/**
 * 管理后台 API 客户端 - 统一走后端接口（MongoDB）
 * 前端仅通过此模块请求数据，不再直连 Dexie
 */

const BASE = "/api/admin"

async function fetchJson<T>(url: string, init?: RequestInit): Promise<{ success: boolean; data?: T; message?: string }> {
  const res = await fetch(url, { ...init, headers: { "Content-Type": "application/json", ...init?.headers } })
  const json = await res.json().catch(() => ({}))
  if (!res.ok) return { success: false, message: json.message ?? res.statusText }
  return json
}

export interface DashboardData {
  stats: {
    totalUsers: number
    totalStreamers: number
    totalOrders: number
    totalRevenue: number
    todayNewUsers: number
    todayOrders: number
    activeStreamers: number
    pendingPawns: number
  }
  recentUsers: { id: string; name?: string; avatar?: string; phone?: string; createdAt?: string }[]
  recentOrders: { orderNo: string; itemName: string; amount: number; createdAt: string }[]
}

export async function getDashboard(): Promise<DashboardData | null> {
  const r = await fetchJson<{ data: DashboardData }>(`${BASE}/dashboard`)
  return r.success && r.data ? r.data : null
}

export async function getUsers(): Promise<Record<string, unknown>[]> {
  const r = await fetchJson<{ data: Record<string, unknown>[] }>(`${BASE}/users`)
  return r.success && r.data ? r.data : []
}

export async function updateUser(id: string, body: Record<string, unknown>): Promise<boolean> {
  const r = await fetchJson(`${BASE}/users/${id}`, { method: "PATCH", body: JSON.stringify(body) })
  return r.success === true
}

export async function deleteUser(id: string): Promise<boolean> {
  const r = await fetchJson(`${BASE}/users/${id}`, { method: "DELETE" })
  return r.success === true
}

/** 用户详情（本库 + 用户资产 API 补充：消费记录、绑定主播），用于管理端点击查询 */
export interface UserDetailEnriched {
  user: { user_id?: string; name?: string; gender?: string; phone?: string; created_at?: string; [k: string]: unknown } | null
  consumption: { amount?: number; timestamp?: string; [k: string]: unknown }[]
  boundStreamer: { streamer_id?: string; streamer_name?: string; [k: string]: unknown } | null
  fromExternal: boolean
}

export async function getUserDetail(id: string): Promise<{
  local: Record<string, unknown>
  enriched: UserDetailEnriched
} | null> {
  const r = await fetchJson<{ data: { local: Record<string, unknown>; enriched: UserDetailEnriched } }>(
    `${BASE}/users/${id}/detail`
  )
  return r.success && r.data ? r.data : null
}

export async function getStreamers(): Promise<Record<string, unknown>[]> {
  const r = await fetchJson<{ data: Record<string, unknown>[] }>(`${BASE}/streamers`)
  return r.success && r.data ? r.data : []
}

/** 单条主播详情（含公会名、绑定统计，后端若已实现则返回） */
export async function getStreamer(id: string): Promise<Record<string, unknown> | null> {
  const r = await fetchJson<{ data: Record<string, unknown> }>(`${BASE}/streamers/${id}`)
  return r.success && r.data ? r.data : null
}

export async function createStreamer(body: Record<string, unknown>): Promise<{ id: string } | null> {
  const r = await fetchJson<{ data: { id: string } }>(`${BASE}/streamers`, { method: "POST", body: JSON.stringify(body) })
  return r.success && r.data ? r.data : null
}

export async function updateStreamer(id: string, body: Record<string, unknown>): Promise<boolean> {
  const r = await fetchJson(`${BASE}/streamers/${id}`, { method: "PATCH", body: JSON.stringify(body) })
  return r.success === true
}

export async function deleteStreamer(id: string): Promise<boolean> {
  const r = await fetchJson(`${BASE}/streamers/${id}`, { method: "DELETE" })
  return r.success === true
}

export async function getProducts(): Promise<Record<string, unknown>[]> {
  const r = await fetchJson<{ data: Record<string, unknown>[] }>(`${BASE}/products`)
  return r.success && r.data ? r.data : []
}

export async function createProduct(body: Record<string, unknown>): Promise<{ id: string } | null> {
  const r = await fetchJson<{ data: { id: string } }>(`${BASE}/products`, { method: "POST", body: JSON.stringify(body) })
  return r.success && r.data ? r.data : null
}

export async function updateProduct(id: string, body: Record<string, unknown>): Promise<boolean> {
  const r = await fetchJson(`${BASE}/products/${id}`, { method: "PATCH", body: JSON.stringify(body) })
  return r.success === true
}

export async function deleteProduct(id: string): Promise<boolean> {
  const r = await fetchJson(`${BASE}/products/${id}`, { method: "DELETE" })
  return r.success === true
}

export async function getPawns(): Promise<Record<string, unknown>[]> {
  const r = await fetchJson<{ data: Record<string, unknown>[] }>(`${BASE}/pawns`)
  return r.success && r.data ? r.data : []
}

export async function updatePawn(id: string, body: Record<string, unknown>): Promise<boolean> {
  const r = await fetchJson(`${BASE}/pawns/${id}`, { method: "PATCH", body: JSON.stringify(body) })
  return r.success === true
}

export interface AdminOrder {
  id: string
  orderNo: string
  type: string
  itemName: string
  amount: number
  status: string
  userId?: string
  createdAt: string
  sourceTable: string
}

export async function getOrders(): Promise<AdminOrder[]> {
  const r = await fetchJson<{ data: AdminOrder[] }>(`${BASE}/orders`)
  return r.success && r.data ? r.data : []
}

export async function updateOrderStatus(id: string, sourceTable: string, status: string): Promise<boolean> {
  const r = await fetchJson(`${BASE}/orders/status`, {
    method: "PATCH",
    body: JSON.stringify({ id, sourceTable, status }),
  })
  return r.success === true
}