// 不动产买卖合约模板
// 覆盖：CN/HK/SG/AE/US/DE/FR/JP/KR/AU/GB
// 每个辖区的不动产合约都有其独特的法律要求

use crate::{ContractField, ContractTemplate, ContractTemplateType, FieldType};

pub fn get_template(jurisdiction: &str) -> Option<ContractTemplate> {
    match jurisdiction.to_uppercase().as_str() {
        "CN" => Some(cn_real_estate_template()),
        "HK" => Some(hk_real_estate_template()),
        "SG" => Some(sg_real_estate_template()),
        "AE" => Some(ae_real_estate_template()),
        "US" => Some(us_real_estate_template()),
        "DE" => Some(de_real_estate_template()),
        "FR" => Some(fr_real_estate_template()),
        "JP" => Some(jp_real_estate_template()),
        "KR" => Some(kr_real_estate_template()),
        "AU" => Some(au_real_estate_template()),
        "GB" => Some(gb_real_estate_template()),
        _ => None,
    }
}

fn cn_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-CN-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "CN".to_string(),
        counterpart_jurisdiction: None,
        name: "中国不动产买卖合同（网签版）".to_string(),
        description: "适用于中国境内不动产（住宅/商业/工业）买卖，须在房管局网签备案".to_string(),
        legal_system: "大陆法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "seller_name".to_string(),
                label: "出卖人姓名/名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "出卖人的完整法定姓名或企业名称".to_string(),
                legal_basis: Some("《合同法》第12条".to_string()),
                example: Some("张三 / 北京某房地产有限公司".to_string()),
            },
            ContractField {
                name: "seller_id".to_string(),
                label: "出卖人身份证/统一社会信用代码".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "出卖人的有效身份证件号码".to_string(),
                legal_basis: Some("《不动产登记暂行条例》第16条".to_string()),
                example: None,
            },
            ContractField {
                name: "buyer_name".to_string(),
                label: "买受人姓名/名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买受人的完整法定姓名或企业名称".to_string(),
                legal_basis: Some("《合同法》第12条".to_string()),
                example: None,
            },
            ContractField {
                name: "buyer_id".to_string(),
                label: "买受人身份证/统一社会信用代码".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买受人的有效身份证件号码".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "房屋坐落地址".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "不动产的完整地址，与不动产权证一致".to_string(),
                legal_basis: Some("《不动产登记暂行条例》".to_string()),
                example: Some("北京市朝阳区某街道某号某楼某单元某室".to_string()),
            },
            ContractField {
                name: "property_certificate_no".to_string(),
                label: "不动产权证书编号".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "不动产权证书的唯一编号".to_string(),
                legal_basis: Some("《不动产登记暂行条例》第22条".to_string()),
                example: None,
            },
            ContractField {
                name: "land_use_right_type".to_string(),
                label: "土地使用权性质".to_string(),
                field_type: FieldType::Enum(vec!["出让".to_string(), "划拨".to_string(), "集体".to_string()]),
                required: true,
                description: "土地使用权的取得方式，影响交易合法性".to_string(),
                legal_basis: Some("《城镇国有土地使用权出让和转让暂行条例》".to_string()),
                example: None,
            },
            ContractField {
                name: "land_use_years_remaining".to_string(),
                label: "土地使用权剩余年限".to_string(),
                field_type: FieldType::Number,
                required: true,
                description: "土地使用权证上的剩余年限".to_string(),
                legal_basis: None,
                example: Some("70（住宅）/ 40（商业）/ 50（工业）".to_string()),
            },
            ContractField {
                name: "building_area".to_string(),
                label: "建筑面积（平方米）".to_string(),
                field_type: FieldType::Number,
                required: true,
                description: "不动产权证上的建筑面积".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "transaction_price".to_string(),
                label: "成交价格（人民币元）".to_string(),
                field_type: FieldType::Currency { currency_code: "CNY".to_string() },
                required: true,
                description: "买卖双方协商确定的成交价格".to_string(),
                legal_basis: Some("《合同法》第12条".to_string()),
                example: None,
            },
            ContractField {
                name: "payment_method".to_string(),
                label: "付款方式".to_string(),
                field_type: FieldType::Enum(vec!["全款".to_string(), "按揭贷款".to_string(), "公积金贷款".to_string(), "组合贷款".to_string()]),
                required: true,
                description: "买受人的付款方式".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "delivery_date".to_string(),
                label: "交房日期".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "出卖人向买受人交付房屋的约定日期".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "household_registration_commitment".to_string(),
                label: "户口迁出承诺".to_string(),
                field_type: FieldType::Boolean,
                required: true,
                description: "出卖人承诺在交房前迁出户口".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        optional_fields: vec![
            ContractField {
                name: "mortgage_status".to_string(),
                label: "抵押状态".to_string(),
                field_type: FieldType::Enum(vec!["无抵押".to_string(), "有抵押（须还清）".to_string()]),
                required: false,
                description: "房屋是否存在抵押".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "decoration_status".to_string(),
                label: "装修状况".to_string(),
                field_type: FieldType::Enum(vec!["毛坯".to_string(), "简装".to_string(), "精装".to_string()]),
                required: false,
                description: "房屋的装修状况".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        required_attachments: vec![
            "不动产权证书（原件）".to_string(),
            "出卖人身份证（复印件）".to_string(),
            "买受人身份证（复印件）".to_string(),
            "婚姻状况证明（已婚须配偶同意书）".to_string(),
            "网签备案回执".to_string(),
        ],
        special_requirements: vec![
            "须在当地房管局进行网签备案（住宅必须）".to_string(),
            "须缴纳契税（买方）、增值税（卖方）、个人所得税（卖方）".to_string(),
            "须在不动产登记中心完成产权转移登记".to_string(),
            "外资买家须提供在华工作/学习证明（住宅）".to_string(),
        ],
        applicable_taxes: vec![
            "契税：1%-3%（买方，首套1%，二套3%）".to_string(),
            "增值税：5%（不满2年），满2年普通住宅免征".to_string(),
            "个人所得税：差价×20%（满5年唯一住房免征）".to_string(),
            "印花税：0.05%".to_string(),
        ],
        dispute_resolution_suggestion: "适用中华人民共和国法律；争议提交不动产所在地人民法院或CIETAC仲裁".to_string(),
        language_requirements: vec!["中文（正本）".to_string()],
    }
}

fn hk_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-HK-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "HK".to_string(),
        counterpart_jurisdiction: None,
        name: "香港物业买卖合约（PASP + ASP）".to_string(),
        description: "适用于香港不动产买卖，包含临时买卖合约和正式买卖合约".to_string(),
        legal_system: "普通法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "vendor_name".to_string(),
                label: "卖方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方的完整法定姓名或公司名称".to_string(),
                legal_basis: Some("《印花税条例》".to_string()),
                example: None,
            },
            ContractField {
                name: "purchaser_name".to_string(),
                label: "买方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方的完整法定姓名或公司名称".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "物业地址".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "物业的完整地址，与土地注册处记录一致".to_string(),
                legal_basis: None,
                example: Some("香港九龙某街道某号某楼某室".to_string()),
            },
            ContractField {
                name: "lot_number".to_string(),
                label: "地段编号（Lot Number）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "土地注册处的地段编号".to_string(),
                legal_basis: Some("《土地注册条例》".to_string()),
                example: None,
            },
            ContractField {
                name: "purchase_price".to_string(),
                label: "成交价格（港元）".to_string(),
                field_type: FieldType::Currency { currency_code: "HKD".to_string() },
                required: true,
                description: "买卖双方协商的成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "initial_deposit".to_string(),
                label: "临时订金（港元）".to_string(),
                field_type: FieldType::Currency { currency_code: "HKD".to_string() },
                required: true,
                description: "签署PASP时支付的临时订金，通常为成交价的3%-5%".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "completion_date".to_string(),
                label: "成交日期".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "完成交割的约定日期".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_nationality".to_string(),
                label: "买方国籍".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "用于确定适用的印花税税率（外资买家须缴纳BSD）".to_string(),
                legal_basis: Some("《印花税条例》BSD条款".to_string()),
                example: None,
            },
        ],
        optional_fields: vec![
            ContractField {
                name: "mortgage_redemption".to_string(),
                label: "按揭赎回安排".to_string(),
                field_type: FieldType::Text,
                required: false,
                description: "如物业有按揭，须说明赎回安排".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        required_attachments: vec![
            "临时买卖合约（PASP）".to_string(),
            "正式买卖合约（ASP）".to_string(),
            "土地查册文件（Land Search）".to_string(),
            "印花税缴纳证明（IRAS）".to_string(),
            "律师行转让契（Assignment）".to_string(),
        ],
        special_requirements: vec![
            "须在14天内缴纳从价印花税（AVD）".to_string(),
            "外资买家须额外缴纳买家印花税（BSD）15%".to_string(),
            "须通过持牌律师行完成转让".to_string(),
            "须在土地注册处完成产权登记".to_string(),
        ],
        applicable_taxes: vec![
            "从价印花税（AVD）：最高15%（住宅）".to_string(),
            "买家印花税（BSD）：15%（非香港永久居民）".to_string(),
        ],
        dispute_resolution_suggestion: "适用香港法律；争议提交香港高等法院或HKIAC仲裁".to_string(),
        language_requirements: vec!["中文或英文（均具法律效力）".to_string()],
    }
}

fn sg_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-SG-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "SG".to_string(),
        counterpart_jurisdiction: None,
        name: "新加坡房产买卖协议（OTP + S&P）".to_string(),
        description: "适用于新加坡私人住宅和商业不动产买卖".to_string(),
        legal_system: "普通法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "vendor_name".to_string(),
                label: "卖方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "purchaser_name".to_string(),
                label: "买方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "物业地址".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "物业完整地址".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "title_number".to_string(),
                label: "地契编号（Title Number）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "SLA土地注册处的地契编号".to_string(),
                legal_basis: Some("《土地所有权法》".to_string()),
                example: None,
            },
            ContractField {
                name: "purchase_price".to_string(),
                label: "成交价格（新加坡元）".to_string(),
                field_type: FieldType::Currency { currency_code: "SGD".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_residency_status".to_string(),
                label: "买方居民身份".to_string(),
                field_type: FieldType::Enum(vec![
                    "新加坡公民".to_string(),
                    "新加坡永久居民".to_string(),
                    "外国人".to_string(),
                    "公司实体".to_string(),
                ]),
                required: true,
                description: "用于确定ABSD税率".to_string(),
                legal_basis: Some("《印花税法》ABSD条款".to_string()),
                example: None,
            },
            ContractField {
                name: "completion_date".to_string(),
                label: "完成日期".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "完成交割的约定日期".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "购房意向书（OTP）".to_string(),
            "买卖合约（S&P）".to_string(),
            "IRAS印花税缴纳证明".to_string(),
            "律师行转让文件".to_string(),
        ],
        special_requirements: vec![
            "须在14天内缴纳BSD印花税".to_string(),
            "外资买家须缴纳ABSD 60%（2023年4月起）".to_string(),
            "须在SLA完成产权转移登记".to_string(),
        ],
        applicable_taxes: vec![
            "买方印花税（BSD）：最高4%".to_string(),
            "额外买方印花税（ABSD）：外国人60%，PR 5%-15%，公民0%-15%".to_string(),
        ],
        dispute_resolution_suggestion: "适用新加坡法律；争议提交新加坡高等法院或SIAC仲裁".to_string(),
        language_requirements: vec!["英文".to_string()],
    }
}

fn ae_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-AE-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "AE".to_string(),
        counterpart_jurisdiction: None,
        name: "阿联酋（迪拜）不动产买卖合约（MOU + Form F）".to_string(),
        description: "适用于迪拜Freehold区域不动产买卖，须通过DLD完成登记".to_string(),
        legal_system: "混合法系（民法+伊斯兰法）".to_string(),
        required_fields: vec![
            ContractField {
                name: "seller_name".to_string(),
                label: "卖方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_name".to_string(),
                label: "买方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "物业地址".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "物业完整地址，须在DLD Freehold区域内".to_string(),
                legal_basis: Some("迪拜土地局条例".to_string()),
                example: None,
            },
            ContractField {
                name: "title_deed_no".to_string(),
                label: "产权证编号（Title Deed No.）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "DLD颁发的产权证编号".to_string(),
                legal_basis: Some("《不动产登记法》".to_string()),
                example: None,
            },
            ContractField {
                name: "purchase_price".to_string(),
                label: "成交价格（阿联酋迪拉姆）".to_string(),
                field_type: FieldType::Currency { currency_code: "AED".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "noc_required".to_string(),
                label: "是否需要NOC（无异议证明）".to_string(),
                field_type: FieldType::Boolean,
                required: true,
                description: "期房或有开发商管理的物业须获取NOC".to_string(),
                legal_basis: Some("DLD要求".to_string()),
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "MOU（备忘录）".to_string(),
            "NOC（无异议证明，开发商出具）".to_string(),
            "Form A（卖方委托书）".to_string(),
            "Form B（买方委托书）".to_string(),
            "Form F（最终合约）".to_string(),
            "护照复印件（买卖双方）".to_string(),
        ],
        special_requirements: vec![
            "须在DLD完成产权转移，缴纳4%转让费".to_string(),
            "NOC须在交割前获取".to_string(),
            "须通过DLD认证的房产中介或律师".to_string(),
        ],
        applicable_taxes: vec![
            "DLD转让费：4%（买方）".to_string(),
            "VAT：5%（商业不动产）".to_string(),
            "阿联酋无资本利得税、无遗产税".to_string(),
        ],
        dispute_resolution_suggestion: "适用阿联酋法律；争议提交RERA（迪拜房地产监管局）或DIAC仲裁".to_string(),
        language_requirements: vec!["阿拉伯文（正本）".to_string(), "英文（副本）".to_string()],
    }
}

fn us_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-US-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "US".to_string(),
        counterpart_jurisdiction: None,
        name: "美国房地产买卖合同（Purchase Agreement）".to_string(),
        description: "适用于美国不动产买卖，各州法律有差异，本模板基于通用原则".to_string(),
        legal_system: "普通法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "seller_name".to_string(),
                label: "卖方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_name".to_string(),
                label: "买方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "物业地址".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "物业完整地址，含州、县、邮编".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "legal_description".to_string(),
                label: "法律描述（Legal Description）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "地契上的法律描述，用于精确识别不动产".to_string(),
                legal_basis: Some("各州产权登记法".to_string()),
                example: None,
            },
            ContractField {
                name: "purchase_price".to_string(),
                label: "成交价格（美元）".to_string(),
                field_type: FieldType::Currency { currency_code: "USD".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "earnest_money".to_string(),
                label: "诚意金（Earnest Money）".to_string(),
                field_type: FieldType::Currency { currency_code: "USD".to_string() },
                required: true,
                description: "买方支付的诚意金，通常为成交价的1%-3%".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "closing_date".to_string(),
                label: "交割日期（Closing Date）".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "完成交割的约定日期".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "seller_is_foreign_person".to_string(),
                label: "卖方是否为外国人（FIRPTA）".to_string(),
                field_type: FieldType::Boolean,
                required: true,
                description: "用于确定是否适用FIRPTA预扣税要求".to_string(),
                legal_basis: Some("《外国人房地产投资税法》（FIRPTA）".to_string()),
                example: None,
            },
        ],
        optional_fields: vec![
            ContractField {
                name: "inspection_contingency".to_string(),
                label: "房屋检查条件（Inspection Contingency）".to_string(),
                field_type: FieldType::Boolean,
                required: false,
                description: "买方是否保留房屋检查后退出的权利".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "financing_contingency".to_string(),
                label: "融资条件（Financing Contingency）".to_string(),
                field_type: FieldType::Boolean,
                required: false,
                description: "买方是否保留贷款未获批后退出的权利".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        required_attachments: vec![
            "产权保险（Title Insurance）".to_string(),
            "地契（Deed：Warranty Deed/Quitclaim Deed）".to_string(),
            "结算声明（Closing Disclosure）".to_string(),
            "FIRPTA证明（外资卖方）".to_string(),
        ],
        special_requirements: vec![
            "须购买产权保险（Title Insurance）".to_string(),
            "须通过托管（Escrow）完成资金交割".to_string(),
            "须在县级登记处完成地契记录（Deed Recording）".to_string(),
            "外资卖方须遵守FIRPTA预扣15%税款".to_string(),
            "涉及军事基地附近须通过CFIUS审查".to_string(),
        ],
        applicable_taxes: vec![
            "转让税：各州不同，约0.1%-2%".to_string(),
            "FIRPTA预扣税：外资卖方15%".to_string(),
            "资本利得税：长期20%，短期按普通所得税率".to_string(),
        ],
        dispute_resolution_suggestion: "适用物业所在州法律；争议提交所在州法院或AAA仲裁".to_string(),
        language_requirements: vec!["英文".to_string()],
    }
}

fn de_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-DE-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "DE".to_string(),
        counterpart_jurisdiction: None,
        name: "德国不动产买卖公证合同（Notarvertrag）".to_string(),
        description: "适用于德国不动产买卖，须通过公证人签署，否则合同无效（BGB §311b）".to_string(),
        legal_system: "大陆法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "verkaeufer_name".to_string(),
                label: "出卖人姓名/公司名称（Verkäufer）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "出卖人完整法定姓名".to_string(),
                legal_basis: Some("BGB §311b".to_string()),
                example: None,
            },
            ContractField {
                name: "kaeufer_name".to_string(),
                label: "买受人姓名/公司名称（Käufer）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买受人完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "grundbuch_info".to_string(),
                label: "土地登记册信息（Grundbuchinformation）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "土地登记册（Grundbuch）中的地块编号和登记信息".to_string(),
                legal_basis: Some("《土地登记条例》（GBO）".to_string()),
                example: Some("Amtsgericht XXX, Grundbuch von XXX, Blatt XXX".to_string()),
            },
            ContractField {
                name: "flurstueck_nr".to_string(),
                label: "地块编号（Flurstücknummer）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "地籍图上的地块编号".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "kaufpreis".to_string(),
                label: "成交价格（欧元）（Kaufpreis）".to_string(),
                field_type: FieldType::Currency { currency_code: "EUR".to_string() },
                required: true,
                description: "买卖双方协商的成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "uebergabedatum".to_string(),
                label: "交付日期（Übergabedatum）".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "不动产交付日期".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "notar_name".to_string(),
                label: "公证人姓名（Notar）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "负责公证的公证人姓名和执照号".to_string(),
                legal_basis: Some("《公证人法》（BNotO）".to_string()),
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "土地登记摘录（Grundbuchauszug）".to_string(),
            "能源证书（Energieausweis）".to_string(),
            "土地转让税完税证明（Unbedenklichkeitsbescheinigung）".to_string(),
            "建筑许可证（如适用）".to_string(),
        ],
        special_requirements: vec![
            "必须通过公证人（Notar）签署公证合同，否则合同无效（BGB §311b）".to_string(),
            "须申请预告登记（Auflassungsvormerkung）保护买方权益".to_string(),
            "须缴纳土地转让税（GrESt）3.5%-6.5%（各州不同）".to_string(),
            "须在土地登记处（Grundbuchamt）完成产权转移登记（Auflassung）".to_string(),
        ],
        applicable_taxes: vec![
            "土地转让税（GrESt）：3.5%-6.5%（各州不同）".to_string(),
            "公证费：约1%-1.5%".to_string(),
            "土地登记费：约0.5%".to_string(),
            "资本利得税：25%（持有10年以上免征）".to_string(),
        ],
        dispute_resolution_suggestion: "适用德国法律；争议提交不动产所在地法院或DIS仲裁".to_string(),
        language_requirements: vec!["德文（正本）".to_string()],
    }
}

fn fr_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-FR-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "FR".to_string(),
        counterpart_jurisdiction: None,
        name: "法国不动产买卖公证合同（Acte authentique de vente）".to_string(),
        description: "适用于法国不动产买卖，须通过公证人签署".to_string(),
        legal_system: "大陆法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "vendeur_name".to_string(),
                label: "出卖人姓名/公司名称（Vendeur）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "出卖人完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "acquereur_name".to_string(),
                label: "买受人姓名/公司名称（Acquéreur）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买受人完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "adresse_bien".to_string(),
                label: "物业地址（Adresse du bien）".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "物业完整地址".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "reference_cadastrale".to_string(),
                label: "地籍参考编号（Référence cadastrale）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "法国地籍局的地块参考编号".to_string(),
                legal_basis: Some("《土地公示法》".to_string()),
                example: None,
            },
            ContractField {
                name: "prix_vente".to_string(),
                label: "成交价格（欧元）（Prix de vente）".to_string(),
                field_type: FieldType::Currency { currency_code: "EUR".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "date_signature".to_string(),
                label: "签署日期".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "公证合同签署日期".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "预售合同（Compromis de vente）".to_string(),
            "诊断报告（DPE能源诊断、铅/石棉检测等）".to_string(),
            "产权证明文件".to_string(),
            "税务证明".to_string(),
        ],
        special_requirements: vec![
            "必须通过公证人（Notaire）签署公证合同".to_string(),
            "买方享有10天冷静期（Délai de rétractation）".to_string(),
            "须在土地公示局完成登记".to_string(),
            "须缴纳注册税（Droits d'enregistrement）约5.8%（旧房）".to_string(),
        ],
        applicable_taxes: vec![
            "注册税（旧房）：约5.8%".to_string(),
            "增值税（新房）：20%".to_string(),
            "资本利得税：30%（含社会税17.2%）".to_string(),
        ],
        dispute_resolution_suggestion: "适用法国法律；争议提交法国法院或ICC仲裁".to_string(),
        language_requirements: vec!["法文（正本）".to_string()],
    }
}

fn jp_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-JP-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "JP".to_string(),
        counterpart_jurisdiction: None,
        name: "日本不動産売買契約書".to_string(),
        description: "适用于日本不动产买卖，须通过司法书士办理登记".to_string(),
        legal_system: "大陆法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "seller_name".to_string(),
                label: "売主（卖方）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_name".to_string(),
                label: "買主（买方）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_location".to_string(),
                label: "物件の所在地（物业地址）".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "不动产完整地址".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "chiban".to_string(),
                label: "地番（地块编号）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "法务局登记的地块编号".to_string(),
                legal_basis: Some("《不動産登記法》".to_string()),
                example: None,
            },
            ContractField {
                name: "sale_price".to_string(),
                label: "売買代金（成交价格，日元）".to_string(),
                field_type: FieldType::Currency { currency_code: "JPY".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "handover_date".to_string(),
                label: "引渡日（交付日期）".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "不动产交付日期".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "登記識別情報（登记识别信息）".to_string(),
            "印鑑証明書（印章证明）".to_string(),
            "固定資産評価証明書（固定资产评价证明）".to_string(),
            "住民票/护照".to_string(),
        ],
        special_requirements: vec![
            "须委托司法书士（Judicial Scrivener）办理所有权移转登记".to_string(),
            "须缴纳不動産取得税（不动产取得税）4%".to_string(),
            "须缴纳登記免許税（登记免许税）2%（所有权移转）".to_string(),
            "外资须遵守外为法申报要求".to_string(),
        ],
        applicable_taxes: vec![
            "不動産取得税：4%（土地3%）".to_string(),
            "登記免許税：2%（所有权移转）".to_string(),
            "印紙税：按合同金额".to_string(),
            "固定資産税：1.4%/年".to_string(),
        ],
        dispute_resolution_suggestion: "适用日本法律；争议提交日本法院或JCAA仲裁".to_string(),
        language_requirements: vec!["日文（正本）".to_string()],
    }
}

fn kr_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-KR-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "KR".to_string(),
        counterpart_jurisdiction: None,
        name: "한국 부동산 매매계약서（韩国不动产买卖合同）".to_string(),
        description: "适用于韩国不动产买卖".to_string(),
        legal_system: "大陆法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "seller_name".to_string(),
                label: "매도인（卖方）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_name".to_string(),
                label: "매수인（买方）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "부동산 소재지（物业地址）".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "不动产完整地址".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "sale_price".to_string(),
                label: "매매대금（成交价格，韩元）".to_string(),
                field_type: FieldType::Currency { currency_code: "KRW".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_is_foreigner".to_string(),
                label: "외국인 여부（买方是否为外国人）".to_string(),
                field_type: FieldType::Boolean,
                required: true,
                description: "用于确定外国人土地取得申报要求".to_string(),
                legal_basis: Some("《외국인토지법》（外国人土地法）".to_string()),
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "등기권리증（登记权利证）".to_string(),
            "인감증명서（印章证明）".to_string(),
            "외국인토지취득신고서（外国人土地取得申报书，外资）".to_string(),
        ],
        special_requirements: vec![
            "外资须向土地管理事务所提交外国人土地取得申报".to_string(),
            "须缴纳취득세（取得税）1%-4%".to_string(),
            "须在登记所完成所有权移转登记".to_string(),
        ],
        applicable_taxes: vec![
            "취득세（取得税）：1%-4%".to_string(),
            "양도소득세（转让所得税）：最高45%（短期持有）".to_string(),
            "부가가치세（增值税）：10%（商业不动产）".to_string(),
        ],
        dispute_resolution_suggestion: "适用韩国法律；争议提交韩国法院或KCAB仲裁".to_string(),
        language_requirements: vec!["韩文（正本）".to_string()],
    }
}

fn au_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-AU-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "AU".to_string(),
        counterpart_jurisdiction: None,
        name: "澳大利亚房产买卖合同（Contract of Sale）".to_string(),
        description: "适用于澳大利亚不动产买卖，各州合同格式略有不同".to_string(),
        legal_system: "普通法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "vendor_name".to_string(),
                label: "卖方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "purchaser_name".to_string(),
                label: "买方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "物业地址".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "物业完整地址，含州、邮编".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "title_reference".to_string(),
                label: "地契参考号（Title Reference）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "州土地产权局的地契参考号".to_string(),
                legal_basis: Some("《托伦斯土地所有权法》".to_string()),
                example: None,
            },
            ContractField {
                name: "purchase_price".to_string(),
                label: "成交价格（澳元）".to_string(),
                field_type: FieldType::Currency { currency_code: "AUD".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_is_foreign_person".to_string(),
                label: "买方是否为外国人（FIRB）".to_string(),
                field_type: FieldType::Boolean,
                required: true,
                description: "用于确定是否需要FIRB批准".to_string(),
                legal_basis: Some("《外国收购和接管法》（FATA）".to_string()),
                example: None,
            },
            ContractField {
                name: "settlement_date".to_string(),
                label: "交割日期（Settlement Date）".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "完成交割的约定日期".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "FIRB批准函（外资买家）".to_string(),
            "印花税缴纳证明".to_string(),
            "产权转移文件（Transfer of Land）".to_string(),
        ],
        special_requirements: vec![
            "外资须事先获得FIRB批准".to_string(),
            "须缴纳印花税（各州不同）".to_string(),
            "外资须缴纳外资附加印花税（各州7%-8%）".to_string(),
            "须在州土地产权局完成产权转移登记".to_string(),
        ],
        applicable_taxes: vec![
            "印花税：各州3%-5.5%".to_string(),
            "外资附加印花税：各州7%-8%".to_string(),
            "资本利得税：最高45%（持有1年以上享50%折扣）".to_string(),
            "GST：10%（新建住宅）".to_string(),
        ],
        dispute_resolution_suggestion: "适用物业所在州法律；争议提交州法院或ACICA仲裁".to_string(),
        language_requirements: vec!["英文".to_string()],
    }
}

fn gb_real_estate_template() -> ContractTemplate {
    ContractTemplate {
        template_id: "RE-GB-001".to_string(),
        template_type: ContractTemplateType::RealEstateSale,
        jurisdiction: "GB".to_string(),
        counterpart_jurisdiction: None,
        name: "英国房产买卖合同（Contract for Sale）".to_string(),
        description: "适用于英格兰和威尔士不动产买卖".to_string(),
        legal_system: "普通法系".to_string(),
        required_fields: vec![
            ContractField {
                name: "seller_name".to_string(),
                label: "卖方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "卖方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_name".to_string(),
                label: "买方姓名/公司名称".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "买方完整法定姓名".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "property_address".to_string(),
                label: "物业地址".to_string(),
                field_type: FieldType::Address,
                required: true,
                description: "物业完整地址，含邮编".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "title_number".to_string(),
                label: "产权编号（Title Number）".to_string(),
                field_type: FieldType::Text,
                required: true,
                description: "HM Land Registry的产权编号".to_string(),
                legal_basis: Some("《土地登记法》2002".to_string()),
                example: None,
            },
            ContractField {
                name: "purchase_price".to_string(),
                label: "成交价格（英镑）".to_string(),
                field_type: FieldType::Currency { currency_code: "GBP".to_string() },
                required: true,
                description: "成交价格".to_string(),
                legal_basis: None,
                example: None,
            },
            ContractField {
                name: "buyer_is_overseas_entity".to_string(),
                label: "买方是否为海外实体（ROE）".to_string(),
                field_type: FieldType::Boolean,
                required: true,
                description: "用于确定是否需要在海外实体登记册（ROE）登记".to_string(),
                legal_basis: Some("《经济犯罪（透明度和执法）法》2022".to_string()),
                example: None,
            },
            ContractField {
                name: "completion_date".to_string(),
                label: "完成日期（Completion Date）".to_string(),
                field_type: FieldType::Date,
                required: true,
                description: "完成交割的约定日期".to_string(),
                legal_basis: None,
                example: None,
            },
        ],
        optional_fields: vec![],
        required_attachments: vec![
            "产权文件（Official Copies from HMLR）".to_string(),
            "SDLT申报表（SDLT1）".to_string(),
            "转让契约（TR1 Transfer Deed）".to_string(),
            "海外实体登记证明（海外实体买家）".to_string(),
        ],
        special_requirements: vec![
            "须在30天内缴纳印花税土地税（SDLT）".to_string(),
            "海外实体须在ROE登记并披露最终受益所有人（UBO）".to_string(),
            "须在HM Land Registry完成产权登记".to_string(),
            "须通过持牌律师完成交割".to_string(),
        ],
        applicable_taxes: vec![
            "印花税土地税（SDLT）：住宅最高12%".to_string(),
            "海外买家附加税：2%".to_string(),
            "资本利得税（CGT）：不动产24%（2024年起）".to_string(),
            "增值税（VAT）：20%（商业不动产）".to_string(),
        ],
        dispute_resolution_suggestion: "适用英格兰和威尔士法律；争议提交高等法院或LCIA仲裁".to_string(),
        language_requirements: vec!["英文".to_string()],
    }
}