import { apiFetch, apiFetchBlob, downloadBlob } from "@/lib/api";

/** 统一分页响应（后端 utils.pagination.pagination_result）。 */
export interface Page<T> {
  items: T[];
  total: number;
  page: number;
  page_size: number;
  total_pages: number;
}

export interface TodoItem {
  id: number;
  todo_type: string;
  customer_id: number | null;
  priority: string;
  status: string;
  due_at: string | null;
}

export interface DashboardData {
  todos?: { pending?: number; items?: TodoItem[] };
  overview?: {
    total_customers?: number;
    signed_customers?: number;
    closed_customers?: number;
    churn_rate?: number;
    total_aum?: string;
    reports_sent?: number;
    reports_draft?: number;
    visits_count?: number;
  };
  customer_levels?: Record<string, number>;
}

export interface Customer {
  customer_id: number;
  real_name: string | null;
  phone: string | null;
  risk_level: string | null;
  customer_level: string | null;
  relation_status: string;
  total_assets: number | null;
}

export interface CustomerDetail extends Customer {
  risk_score?: number | null;
  signed_time?: string | null;
  assigned_time?: string | null;
}

export interface Holding {
  product_id: number;
  product_code: string | null;
  product_name: string | null;
  risk_level: string | null;
  shares: string;
  cost_amount: string;
  current_value: string;
  profit_loss: string;
  profit_ratio: string;
  status: string;
}

export interface ReportItem {
  report_id: string;
  intent: string | null;
  title: string | null;
  send_status: string;
  send_time: string | null;
}

export interface Visit {
  id: number;
  customer_id: number;
  advisor_id: number;
  visit_type: string;
  visit_time: string;
  summary: string | null;
  audio_url: string | null;
  create_time: string | null;
}

export interface Diagnosis {
  total_value: string;
  allocation: Record<string, string>;
  concentration: { top_product_ratio: number; top_product: { product_name: string | null } | null };
  holdings: { product_code: string | null; product_name: string | null; product_type: string; current_value: string }[];
}

export interface RiskAlert {
  id: number;
  customer_id: number | null;
  order_id: number | null;
  alert_type: string;
  alert_level: string;
  trigger_detail: string | null;
  transaction_ids: unknown;
  confidence: number | null;
  status: string;
  handler_id: number | null;
  handle_result: string | null;
  handle_time: string | null;
  create_time: string | null;
}

export interface WorkOrder {
  id: number;
  work_order_no: string;
  order_type: string;
  sub_type: string | null;
  customer_id: number | null;
  submitter_id: number | null;
  handler_id: number | null;
  current_node: string | null;
  priority: string;
  status: string;
  biz_content: Record<string, unknown> | null;
  create_time: string | null;
  update_time: string | null;
}

export interface FundProduct {
  id: number;
  product_code: string;
  product_name: string;
  product_type: string;
  risk_level: string;
  nav: number | null;
  nav_date: string | null;
  fund_manager: string | null;
  status: string;
}

export interface Draft {
  draft_id?: string;
  id?: string;
  title?: string;
  content?: string;
  status?: string;
  customer_id?: number | null;
  intent?: string | null;
  create_time?: string | null;
  update_time?: string | null;
}

export interface TalkTemplate {
  scene: string;
  content: string;
}

export interface PersonalReport {
  total_aum: string;
  total_customers: number;
  signed_customers: number;
  reports_sent: number;
  visits_count: number;
}

export interface AuditRow {
  id: number;
  username: string | null;
  module: string | null;
  action: string | null;
  target: string | null;
  detail: string | null;
  status: string | null;
  create_time: string | null;
}

/** GET /products/{code}/history —— 走势图数据（series=nav|return）。 */
export interface FundNavHistory {
  product_code: string;
  series: string;
  total_growth_rate: number;
  max_return_rate: number;
  max_drawdown_rate: number;
  items: { nav_date: string; nav?: number | null; return_rate?: number | null }[];
}

/** POST /advisor/data-query —— 工作台代理的 NL2SQL 查询结果。 */
export interface AdvisorDataQueryResult {
  query_id?: string;
  answer?: string;
  summary?: string;
  columns?: string[];
  rows?: Record<string, unknown>[];
  row_count?: number;
  truncated?: boolean;
  [key: string]: unknown;
}

/** GET /profile/composed —— 画像 + 记忆 + 持仓三源整合结果。 */
export interface ComposedProfile {
  customer_id?: number;
  profile?: Record<string, unknown> | null;
  memories?: unknown[];
  holdings?: unknown[];
  [key: string]: unknown;
}

/** GET /health/ready —— 四库就绪探测。 */
export interface HealthReady {
  ready?: boolean;
  checks?: Record<string, unknown>;
  [key: string]: unknown;
}

function qs(params: Record<string, string | number | undefined | null>) {
  const search = new URLSearchParams();
  for (const [key, value] of Object.entries(params)) {
    if (value !== undefined && value !== null && value !== "") search.set(key, String(value));
  }
  const text = search.toString();
  return text ? `?${text}` : "";
}

export const adminApi = {
  me: () => apiFetch<{ user: import("@/types/api").UserPayload }>("/auth/me").then((r) => r.user),

  dashboard: () => apiFetch<DashboardData>("/advisor/dashboard"),
  personalReport: () => apiFetch<PersonalReport>("/advisor/report/personal"),

  customers: (params: { status?: string; keyword?: string; page?: number; page_size?: number }) =>
    apiFetch<Page<Customer>>(`/advisor/customers${qs(params)}`),
  customer: (id: number, unmask = false) =>
    apiFetch<CustomerDetail>(`/advisor/customers/${id}${qs({ unmask: unmask ? "true" : null })}`),
  holdings: (id: number) => apiFetch<Holding[]>(`/advisor/customers/${id}/holdings`),
  reports: (id: number, page = 1, page_size = 10) =>
    apiFetch<Page<ReportItem>>(`/advisor/customers/${id}/reports${qs({ page, page_size })}`),
  diagnosis: (id: number) => apiFetch<Diagnosis>(`/advisor/diagnosis/${id}`),
  setRelation: (id: number, action: "sign" | "close", reason?: string) =>
    apiFetch<{ customer_id: number; status: string }>(`/advisor/customers/${id}/relation`, {
      method: "POST",
      body: JSON.stringify({ action, reason: reason || null }),
    }),

  todos: (params: { status?: string; todo_type?: string; page?: number; page_size?: number }) =>
    apiFetch<Page<TodoItem>>(`/advisor/todos${qs(params)}`),
  handleTodo: (id: number, action: "process" | "done") =>
    apiFetch<unknown>(`/advisor/todos/${id}/handle`, {
      method: "POST",
      body: JSON.stringify({ action }),
    }),

  visits: (params: { customer_id?: number; page?: number; page_size?: number }) =>
    apiFetch<Page<Visit>>(`/advisor/visits${qs(params)}`),
  createVisit: (body: { customer_id: number; visit_type: string; visit_time: string; summary?: string }) =>
    apiFetch<{ visit_id: number }>("/advisor/visits", { method: "POST", body: JSON.stringify(body) }),
  updateVisit: (id: number, body: Partial<{ visit_type: string; visit_time: string; summary: string }>) =>
    apiFetch<Visit>(`/advisor/visits/${id}`, { method: "PUT", body: JSON.stringify(body) }),
  talkTemplates: () => apiFetch<TalkTemplate[]>("/advisor/talk-templates"),
  touchLogs: (customerId: number, page = 1, page_size = 10) =>
    apiFetch<{ messages: unknown[]; visits: Visit[] }>(`/advisor/touch-logs${qs({ customer_id: customerId, page, page_size })}`),

  drafts: (params: { customer_id?: number; status?: string; page?: number; page_size?: number } = {}) =>
    apiFetch<Page<Draft>>(`/advisor/drafts${qs(params)}`),
  draft: (draftId: string) => apiFetch<Draft>(`/advisor/drafts/${draftId}`),
  saveDraft: (draftId: string, body: { title?: string; content?: string }) =>
    apiFetch<unknown>(`/advisor/drafts/${draftId}/save`, { method: "PUT", body: JSON.stringify(body) }),
  discardDraft: (draftId: string) =>
    apiFetch<unknown>(`/advisor/drafts/${draftId}/discard`, { method: "POST" }),
  sendDraft: (draftId: string) =>
    apiFetch<unknown>(`/advisor/drafts/${draftId}/send`, { method: "POST" }),
  runRebalance: (query: string) =>
    apiFetch<unknown>("/advisor/rebalance/run", { method: "POST", body: JSON.stringify({ query }) }),
  generateTalkScript: (query: string) =>
    apiFetch<{ script?: string; content?: string }>("/advisor/talk-script", {
      method: "POST",
      body: JSON.stringify({ query }),
    }),

  strategies: () => apiFetch<{ risk_level: string; target_allocation: unknown; drift_threshold: number }[]>("/advisor/strategies"),
  funds: (params: { keyword?: string; product_type?: string; risk_level?: string; page?: number; page_size?: number }) =>
    apiFetch<Page<FundProduct>>(`/advisor/funds${qs(params)}`),
  auditLedger: (params: { page?: number; page_size?: number; action?: string } = {}) =>
    apiFetch<Page<AuditRow>>(`/advisor/audit/ledger${qs(params)}`),

  alerts: (params: { status?: string; page?: number; page_size?: number } = {}) =>
    apiFetch<Page<RiskAlert>>(`/risk/alert/list${qs(params)}`),
  alertAction: (id: number, action: "release" | "block" | "freeze") =>
    apiFetch<Record<string, unknown>>(`/risk/alert/${id}/${action}`, { method: "POST" }),

  workOrders: (params: { status?: string; page?: number; page_size?: number } = {}) =>
    apiFetch<Page<WorkOrder>>(`/work-order/list${qs(params)}`),
  workOrder: (id: number) => apiFetch<WorkOrder>(`/work-order/${id}`),
  claimWorkOrder: (id: number) =>
    apiFetch<unknown>("/work-order/claim", { method: "POST", body: JSON.stringify({ work_order_id: id }) }),
  submitWorkOrder: (id: number) =>
    apiFetch<unknown>("/work-order/submit-review", { method: "POST", body: JSON.stringify({ work_order_id: id }) }),
  reviewWorkOrder: (id: number, approve: boolean, comment: string) =>
    apiFetch<unknown>("/work-order/review", {
      method: "POST",
      body: JSON.stringify({ work_order_id: id, approve, comment }),
    }),

  products: (params: { keyword?: string; page?: number; page_size?: number } = {}) =>
    apiFetch<Page<FundProduct>>(`/products${qs(params)}`),

  /** GET /products/{product_code}/history —— 历史净值/收益序列，series 仅支持 nav|return。 */
  productHistory: (
    productCode: string,
    params: { start_date?: string; end_date?: string; series?: "nav" | "return" } = {}
  ) =>
    apiFetch<FundNavHistory>(`/products/${encodeURIComponent(productCode)}/history${qs(params)}`),

  /** POST /advisor/data-query —— 工作台侧代理的 NL2SQL 客户数据查询。 */
  advisorDataQuery: (body: {
    query: string;
    session_id?: string;
    max_rows?: number;
    page?: number;
    page_size?: number;
  }) =>
    apiFetch<AdvisorDataQueryResult>("/advisor/data-query", {
      method: "POST",
      body: JSON.stringify(body),
    }),

  /** GET /advisor/visits/{id} —— 回访详情（列表接口之外的单条读取）。 */
  visit: (visitId: number) => apiFetch<Visit>(`/advisor/visits/${visitId}`),

  /** GET /advisor/audit/export —— 导出本人审计台账 CSV。 */
  exportAuditLedger: async (params: { action?: string } = {}) => {
    const blob = await apiFetchBlob(`/advisor/audit/export${qs(params)}`);
    downloadBlob(blob, `audit-ledger-${new Date().toISOString().slice(0, 10)}.csv`);
  },

  /** GET /profile/composed —— 画像 + 记忆 + 持仓三源整合，仅员工可查。 */
  composedProfile: (customerId: number) =>
    apiFetch<ComposedProfile>(`/profile/composed${qs({ customer_id: customerId })}`),

  /** GET /health/ready —— 四库就绪探测。 */
  healthReady: () => apiFetch<HealthReady>("/health/ready"),
};

/** 统一错误信息提取，避免每个组件重复判断。 */
export function errMessage(error: unknown, fallback = "操作失败") {
  return error instanceof Error ? error.message : fallback;
}