/**
 * 积分系统 API 封装
 * 对齐后端 staging 实测最终契约（2026-09-16）
 *
 * 当前 POINTS_API_MOCK=true：使用 MOCK_* 常量 + setTimeout 模拟延迟，
 * 等后端 P0（支付通道接入、change-plan 校验）稳定后切 false 联调。
 *
 * 会员/订阅 API 在 @/api/subscription 中定义，避免重复封装。
 */
import apiClient from "../client"
import type {
  PointsBalance,
  PointsRulesResponse,
  PointsPackagesResponse,
  PointsTransaction,
  PointsTransactionsResponse,
  PointsCheckRequest,
  PointsCheckResponse,
  CreateRechargeOrderRequest,
  CreateRechargeOrderResponse,
  DailyUsage,
  MembershipResponse,
} from "./types"

/** 模拟网络延迟（ms） */
const MOCK_DELAY = 500

/* ================================================================
 * Mock 数据
 * ================================================================ */

/** mock 余额（无 free_clips_* 字段，已拆分到 dailyUsage） */
const MOCK_BALANCE: PointsBalance = {
  balance: 258,
  total_earned: 500,
  total_spent: 242,
  is_member: false,
  member_type: null,
  member_expires_at: null,
}

const MOCK_RULES: PointsRulesResponse = {
  rules: [
    {
      scene_key: "ai_voice",
      name: "AI 配音",
      base_points: 2,
      unit: "次",
      description: "单次配音消耗 2 积分，超 30 秒每 30 秒 +1 积分",
      extra_per_30s: 1,
    },
    {
      scene_key: "ai_video",
      name: "AI 视频生成",
      base_points: 8,
      unit: "条",
      description: "单条视频 8 积分起，按视频时长加收",
      extra_per_30s: 3,
    },
    {
      scene_key: "ai_digital_human",
      name: "AI 数字人",
      base_points: 15,
      unit: "次",
      description: "数字人生成 15 积分起",
      extra_per_30s: 5,
    },
    {
      scene_key: "voice_clone_train",
      name: "声音克隆训练",
      base_points: 20,
      unit: "次",
      description: "声音模型训练一次性消耗 20 积分",
    },
    {
      scene_key: "voice_clone_synth",
      name: "声音克隆合成",
      base_points: 3,
      unit: "次",
      description: "使用克隆声音合成音频每次 3 积分",
    },
    {
      scene_key: "douyin_extract",
      name: "抖音文案提取",
      base_points: 1,
      unit: "次",
      description: "提取抖音视频文案每次 1 积分",
    },
    {
      scene_key: "ai_rewrite",
      name: "AI 文案改写",
      base_points: 2,
      unit: "次",
      description: "AI 改写文案每次 2 积分",
    },
    {
      scene_key: "ai_title",
      name: "AI 标题生成",
      base_points: 1,
      unit: "次",
      description: "AI 生成标题每次 1 积分，一次生成多条",
    },
    {
      scene_key: "ai_cover",
      name: "AI 封面生成",
      base_points: 3,
      unit: "次",
      description: "AI 生成封面每次 3 积分",
    },
  ],
  free_user_multiplier: 1.15,
}

const MOCK_PACKAGES: PointsPackagesResponse = {
  packages: [
    { code: "points_100", name: "100 积分", points: 100, price_cents: 990, unit_price: 0.099 },
    { code: "points_500", name: "500 积分", points: 500, price_cents: 4490, unit_price: 0.0898 },
    { code: "points_1000", name: "1000 积分", points: 1000, price_cents: 7990, unit_price: 0.0799 },
    {
      code: "points_3000",
      name: "3000 积分",
      points: 3000,
      price_cents: 19900,
      unit_price: 0.0663,
    },
  ],
  user_discount: null,
}

const MOCK_TRANSACTIONS: PointsTransaction[] = [
  {
    id: 1,
    type: "deduct",
    source: "ai_video",
    amount: 10,
    balance_after: 248,
    description: "AI 视频生成 ×1（非会员倍率）",
    ref_id: "task_abc123",
    created_at: "2026-09-16T08:30:00Z",
  },
  {
    id: 2,
    type: "add",
    source: "recharge",
    amount: 100,
    balance_after: 258,
    description: "充值 100 积分",
    ref_id: "order_xyz789",
    created_at: "2026-09-15T14:20:00Z",
  },
  {
    id: 3,
    type: "deduct",
    source: "ai_voice",
    amount: 3,
    balance_after: 158,
    description: "AI 配音 ×1（45s 加收）",
    ref_id: "",
    created_at: "2026-09-15T10:15:00Z",
  },
  {
    id: 4,
    type: "add",
    source: "sign_up",
    amount: 60,
    balance_after: 161,
    description: "新用户注册赠送",
    ref_id: "",
    created_at: "2026-09-10T09:00:00Z",
  },
  {
    id: 5,
    type: "deduct",
    source: "ai_title",
    amount: 1,
    balance_after: 101,
    description: "AI 标题生成 ×1",
    ref_id: "",
    created_at: "2026-09-14T16:45:00Z",
  },
]

const MOCK_DAILY_USAGE: DailyUsage = {
  free_clips_used: 1,
  free_clips_limit: 3,
  free_clips_remaining: 2,
  reset_at: new Date(Date.now() + 8 * 3600_000).toISOString(),
}

const MOCK_MEMBERSHIP: MembershipResponse = {
  is_member: false,
  member_type: null,
  member_expires_at: null,
  points_balance: 258,
  max_resolution: "720p",
}

/* ================================================================
 * 积分 API
 * ================================================================ */

/** 获取积分余额 */
export async function getPointsBalance(): Promise<PointsBalance> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY))
    return { ...MOCK_BALANCE }
  }
  const { data } = await apiClient.get(`/points/balance`)
  return data
}

/** 获取积分消耗规则 */
export async function getPointsRules(): Promise<PointsRulesResponse> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY))
    return { rules: [...MOCK_RULES.rules], free_user_multiplier: MOCK_RULES.free_user_multiplier }
  }
  const { data } = await apiClient.get(`/points/rules`)
  return data
}

/** 获取充值包列表 */
export async function getPointsPackages(): Promise<PointsPackagesResponse> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY))
    return { packages: MOCK_PACKAGES.packages.map((p) => ({ ...p })), user_discount: null }
  }
  const { data } = await apiClient.get(`/points/packages`)
  return data
}

/**
 * 获取积分流水（分页）
 */
export async function getPointsTransactions(
  page = 1,
  pageSize = 20,
): Promise<PointsTransactionsResponse> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY))
    const start = (page - 1) * pageSize
    const items = MOCK_TRANSACTIONS.slice(start, start + pageSize)
    return {
      items: items.map((t) => ({ ...t })),
      total: MOCK_TRANSACTIONS.length,
      page,
      page_size: pageSize,
    }
  }
  const { data } = await apiClient.get(`/points/transactions`, {
    params: { page, page_size: pageSize },
  })
  return data
}

/**
 * 创建充值订单
 * 注意：当前 pay_params 返回空对象 {}（支付通道未接入），
 * 前端可以完成订单创建 UI，但无法发起真实支付，待后续支付通道接入后联调。
 */
export async function createPointsOrder(
  data: CreateRechargeOrderRequest,
): Promise<CreateRechargeOrderResponse> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY * 2))
    const pkg = MOCK_PACKAGES.packages.find((p) => p.code === data.package_id)
    if (!pkg) throw new Error("充值包不存在")
    return {
      id: `mock_order_${Date.now()}`,
      order_type: "points_recharge",
      product_code: pkg.code,
      amount_cents: pkg.price_cents,
      points_amount: pkg.points,
      status: "pending",
      pay_params: {},
      expire_at: new Date(Date.now() + 30 * 60_000).toISOString(),
      created_at: new Date().toISOString(),
    }
  }
  const { data: d } = await apiClient.post(`/points/recharge`, data)
  return d
}

/**
 * 积分预检查（消耗前调用）
 */
export async function checkPoints(data: PointsCheckRequest): Promise<PointsCheckResponse> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY))
    const rule = MOCK_RULES.rules.find((r) => r.scene_key === data.scene_key)
    if (!rule) {
      throw {
        error: {
          code: 400,
          message: `未知场景：${data.scene_key}`,
          valid_scenes: MOCK_RULES.rules.map((r) => r.scene_key),
        },
      }
    }
    const durationExtra =
      data.duration_minutes && data.duration_minutes > 0.5 && rule.extra_per_30s
        ? Math.ceil((data.duration_minutes * 60 - 30) / 30) * rule.extra_per_30s
        : 0
    const base = (rule.base_points + durationExtra) * data.quantity
    const balance = MOCK_BALANCE.balance
    const multiplier = MOCK_BALANCE.is_member ? 1 : MOCK_RULES.free_user_multiplier
    const required = Math.ceil(base * multiplier)
    // 免费额度抵扣
    const isFreeQuota = !MOCK_BALANCE.is_member && MOCK_DAILY_USAGE.free_clips_remaining > 0
    const finalRequired = isFreeQuota ? 0 : required
    return {
      allowed: balance >= finalRequired,
      required_points: finalRequired,
      current_balance: balance,
      remaining_after: balance - finalRequired,
      is_free_quota: isFreeQuota,
    }
  }
  const { data: d2 } = await apiClient.post(`/points/check`, data)
  return d2
}

/* ================================================================
 * 每日免费额度 + 会员聚合信息（新接口）
 * ================================================================ */

/** 获取每日免费额度使用情况 */
export async function getDailyUsage(): Promise<DailyUsage> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY))
    return { ...MOCK_DAILY_USAGE }
  }
  const { data } = await apiClient.get(`/usage/daily`)
  return data
}

/** 获取会员聚合信息（创作页可用来判断 max_resolution） */
export async function getMembership(): Promise<MembershipResponse> {
  if (process.env.POINTS_API_MOCK === "true") {
    await new Promise((resolve) => setTimeout(resolve, MOCK_DELAY))
    return { ...MOCK_MEMBERSHIP }
  }
  const { data } = await apiClient.get(`/points/subscription/membership`)
  return data
}