//! NVM字节码生成模块
//!
//! 将CNNL条款编译为NVM宪法指令（0xE0-0xEF）

/// NVM宪法指令操作码
#[repr(u8)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ConstitutionalOpcode {
    ClauseLoad = 0xE0,      // 加载宪法条款
    ClauseVerify = 0xE1,    // 验证宪法条款
    ParamGet = 0xE2,        // 获取宪法参数
    PredicateEval = 0xE3,   // 执行宪法谓词
    ObligationCheck = 0xE4, // 检查义务履行
    ReceiptIssue = 0xE5,    // 签发宪政收据
    AmendmentPropose = 0xE6,// 提出修正案
    AmendmentVote = 0xE7,   // 投票修正案
}

pub mod bytecode_generator;

pub use bytecode_generator::BytecodeGenerator;

/// 字节码生成器
pub struct CodeGenerator {
    bytecode_gen: BytecodeGenerator,
}

impl CodeGenerator {
    pub fn new() -> Self {
        Self {
            bytecode_gen: BytecodeGenerator::new(),
        }
    }

    pub fn generate(&mut self, ast: &crate::parser::Program) -> Result<Vec<u8>, String> {
        self.bytecode_gen.generate_program(ast)
    }
}

impl Default for CodeGenerator {
    fn default() -> Self {
        Self::new()
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_opcode_values() {
        assert_eq!(ConstitutionalOpcode::ClauseLoad as u8, 0xE0);
        assert_eq!(ConstitutionalOpcode::ClauseVerify as u8, 0xE1);
        assert_eq!(ConstitutionalOpcode::ParamGet as u8, 0xE2);
    }
}