/**
 * Presale Configuration Database Helpers
 *
 * Manages the presale_config table — a key-value store for
 * admin-editable presale parameters.
 *
 * Default values are seeded on first access if not present.
 */

import { eq } from "drizzle-orm";
import { getDb } from "./db";
import { presaleConfig } from "../drizzle/schema";

// ─── Default configuration values ─────────────────────────────────────────────
export const DEFAULT_CONFIG: Array<{
  key: string;
  value: string;
  label: string;
  description: string;
  type: string;
}> = [
  {
    key: "presaleEndDate",
    value: "2026-06-30T23:59:59Z",
    label: "预售结束时间 (Presale End Date)",
    description: "ISO 8601 格式，例如：2026-06-30T23:59:59Z",
    type: "date",
  },
  {
    key: "tokenPrice",
    value: "0.02",
    label: "代币价格 (Token Price, USDT)",
    description: "每枚 XIC 的 USDT 价格",
    type: "number",
  },
  {
    key: "hardCap",
    value: "5000000",
    label: "硬顶 (Hard Cap, USDT)",
    description: "预售最大募资额（USDT）",
    type: "number",
  },
  {
    key: "listingPrice",
    value: "0.10",
    label: "上市目标价格 (Target Listing Price, USDT)",
    description: "预计上市价格（仅展示用）",
    type: "number",
  },
  {
    key: "totalSupply",
    value: "100000000000",
    label: "总供应量 (Total Supply)",
    description: "XIC 代币总供应量",
    type: "number",
  },
  {
    key: "maxPurchaseUsdt",
    value: "50000",
    label: "单笔最大购买额 (Max Purchase, USDT)",
    description: "单笔购买最大 USDT 金额",
    type: "number",
  },
  {
    key: "presaleStatus",
    value: "live",
    label: "预售状态 (Presale Status)",
    description: "live = 进行中，paused = 暂停，ended = 已结束",
    type: "text",
  },
  {
    key: "heroTitle",
    value: "XIC Token Presale",
    label: "首页标题 (Hero Title)",
    description: "首页大标题文字",
    type: "text",
  },
  {
    key: "heroSubtitle",
    value: "New AssetChain — The next-generation RWA native blockchain with AI-native compliance, CBPP consensus, and Charter smart contracts.",
    label: "首页副标题 (Hero Subtitle)",
    description: "首页副标题文字",
    type: "text",
  },
  {
    key: "tronReceivingAddress",
    value: "TWc2ugYBFN5aSoimAh4qGt9oMyket6NYZp",
    label: "TRC20 收款地址 (TRON Receiving Address)",
    description: "接收 TRC20 USDT 的 TRON 地址",
    type: "text",
  },
  {
    key: "telegramBotToken",
    value: "",
    label: "Telegram Bot Token",
    description: "从 @BotFather 获取的 Bot Token，用于发送购买通知",
    type: "text",
  },
  {
    key: "telegramChatId",
    value: "",
    label: "Telegram Chat ID",
    description: "接收通知的 Chat ID（个人账号或群组）",
    type: "text",
  },
];

export interface ConfigMap {
  [key: string]: string;
}

/**
 * Seed default config values if not already present.
 */
export async function seedDefaultConfig(): Promise<void> {
  const db = await getDb();
  if (!db) return;

  for (const item of DEFAULT_CONFIG) {
    try {
      const existing = await db
        .select()
        .from(presaleConfig)
        .where(eq(presaleConfig.key, item.key))
        .limit(1);

      if (existing.length === 0) {
        await db.insert(presaleConfig).values({
          key: item.key,
          value: item.value,
          label: item.label,
          description: item.description,
          type: item.type,
        });
      }
    } catch (e) {
      console.warn(`[Config] Failed to seed ${item.key}:`, e);
    }
  }
}

/**
 * Get all config values as a key-value map.
 * Falls back to DEFAULT_CONFIG values if DB is unavailable.
 */
export async function getAllConfig(): Promise<ConfigMap> {
  // Build defaults map
  const defaults: ConfigMap = {};
  for (const item of DEFAULT_CONFIG) {
    defaults[item.key] = item.value;
  }

  const db = await getDb();
  if (!db) return defaults;

  try {
    const rows = await db.select().from(presaleConfig);
    const result: ConfigMap = { ...defaults };
    for (const row of rows) {
      result[row.key] = row.value;
    }
    return result;
  } catch (e) {
    console.warn("[Config] Failed to read config:", e);
    return defaults;
  }
}

/**
 * Get a single config value by key.
 */
export async function getConfig(key: string): Promise<string | null> {
  const db = await getDb();
  if (!db) {
    const def = DEFAULT_CONFIG.find((c) => c.key === key);
    return def?.value ?? null;
  }

  try {
    const rows = await db
      .select()
      .from(presaleConfig)
      .where(eq(presaleConfig.key, key))
      .limit(1);

    if (rows.length > 0) return rows[0].value;

    // Fall back to default
    const def = DEFAULT_CONFIG.find((c) => c.key === key);
    return def?.value ?? null;
  } catch (e) {
    console.warn(`[Config] Failed to read ${key}:`, e);
    return null;
  }
}

/**
 * Update a single config value.
 */
export async function setConfig(key: string, value: string): Promise<void> {
  const db = await getDb();
  if (!db) throw new Error("DB unavailable");

  const existing = await db
    .select()
    .from(presaleConfig)
    .where(eq(presaleConfig.key, key))
    .limit(1);

  if (existing.length > 0) {
    await db
      .update(presaleConfig)
      .set({ value })
      .where(eq(presaleConfig.key, key));
  } else {
    const def = DEFAULT_CONFIG.find((c) => c.key === key);
    await db.insert(presaleConfig).values({
      key,
      value,
      label: def?.label ?? key,
      description: def?.description ?? "",
      type: def?.type ?? "text",
    });
  }
}