/**
 * 租户管理 API
 */

import { getAccessToken } from '../../../../framework/auth/api';

const API_BASE = '/api/admin/tenants';
const MODULES_API = '/api/admin/modules';

function getAuthHeaders(): HeadersInit {
  const headers: Record<string, string> = {
    'Content-Type': 'application/json',
  };
  const token = getAccessToken();
  if (token) {
    headers['Authorization'] = `Bearer ${token}`;
  }
  return headers;
}

// ==================== 类型定义 ====================

export type TenantType = 'HOSPITAL' | 'PHARMA' | 'JOURNAL' | 'INTERNAL' | 'PUBLIC';
export type TenantStatus = 'ACTIVE' | 'SUSPENDED' | 'EXPIRED';
export type JournalLanguage = 'ZH' | 'EN' | 'OTHER';

export interface TenantInfo {
  id: string;
  code: string;
  name: string;
  type: TenantType;
  journalLanguage?: JournalLanguage | null;
  journalFullName?: string | null;
  logoUrl?: string | null;
  brandColor?: string | null;
  loginBackgroundUrl?: string | null;
  status: TenantStatus;
  contactName?: string | null;
  contactPhone?: string | null;
  contactEmail?: string | null;
  expiresAt?: string | null;
  createdAt: string;
  updatedAt: string;
}

export interface TenantModuleConfig {
  code: string;
  name: string;
  enabled: boolean;
  expiresAt?: string | null;
}

export interface TenantDetail extends TenantInfo {
  modules: TenantModuleConfig[];
  userCount: number;
}

export interface ModuleInfo {
  code: string;
  name: string;
  description?: string | null;
  icon?: string | null;
}

export interface CreateTenantRequest {
  code: string;
  name: string;
  type: TenantType;
  journalLanguage?: JournalLanguage;
  journalFullName?: string;
  logoUrl?: string;
  brandColor?: string;
  loginBackgroundUrl?: string;
  contactName?: string;
  contactPhone?: string;
  contactEmail?: string;
  expiresAt?: string;
  modules?: string[];
}

export interface UpdateTenantRequest {
  name?: string;
  type?: TenantType;
  journalLanguage?: JournalLanguage | null;
  journalFullName?: string | null;
  logoUrl?: string | null;
  brandColor?: string | null;
  loginBackgroundUrl?: string | null;
  contactName?: string;
  contactPhone?: string;
  contactEmail?: string;
  expiresAt?: string | null;
}

export interface TenantListResponse {
  success: boolean;
  data: TenantInfo[];
  total: number;
  page: number;
  limit: number;
  totalPages: number;
}

// ==================== API 函数 ====================

/**
 * 获取租户列表
 */
export async function fetchTenantList(params?: {
  type?: TenantType;
  status?: TenantStatus;
  search?: string;
  page?: number;
  limit?: number;
}): Promise<TenantListResponse> {
  const searchParams = new URLSearchParams();
  if (params?.type) searchParams.set('type', params.type);
  if (params?.status) searchParams.set('status', params.status);
  if (params?.search) searchParams.set('search', params.search);
  if (params?.page) searchParams.set('page', String(params.page));
  if (params?.limit) searchParams.set('limit', String(params.limit));

  const url = `${API_BASE}?${searchParams.toString()}`;
  const response = await fetch(url, {
    method: 'GET',
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '获取租户列表失败');
  }

  return response.json();
}

/**
 * 获取租户详情
 */
export async function fetchTenantDetail(id: string): Promise<TenantDetail> {
  const response = await fetch(`${API_BASE}/${id}`, {
    method: 'GET',
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '获取租户详情失败');
  }

  const result = await response.json();
  return result.data;
}

/**
 * 创建租户
 */
export async function createTenant(data: CreateTenantRequest): Promise<TenantInfo> {
  const response = await fetch(API_BASE, {
    method: 'POST',
    headers: getAuthHeaders(),
    body: JSON.stringify(data),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '创建租户失败');
  }

  const result = await response.json();
  return result.data;
}

/**
 * 更新租户信息
 */
export async function updateTenant(id: string, data: UpdateTenantRequest): Promise<TenantInfo> {
  const response = await fetch(`${API_BASE}/${id}`, {
    method: 'PUT',
    headers: getAuthHeaders(),
    body: JSON.stringify(data),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '更新租户失败');
  }

  const result = await response.json();
  return result.data;
}

/**
 * 更新租户状态
 */
export async function updateTenantStatus(id: string, status: TenantStatus): Promise<void> {
  const response = await fetch(`${API_BASE}/${id}/status`, {
    method: 'PUT',
    headers: getAuthHeaders(),
    body: JSON.stringify({ status }),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '更新租户状态失败');
  }
}

/**
 * 删除租户
 */
export async function deleteTenant(id: string): Promise<void> {
  const response = await fetch(`${API_BASE}/${id}`, {
    method: 'DELETE',
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '删除租户失败');
  }
}

/**
 * 配置租户模块
 */
export async function configureModules(
  tenantId: string,
  modules: { code: string; enabled: boolean; expiresAt?: string | null }[]
): Promise<TenantModuleConfig[]> {
  const response = await fetch(`${API_BASE}/${tenantId}/modules`, {
    method: 'PUT',
    headers: getAuthHeaders(),
    body: JSON.stringify({ modules }),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '配置租户模块失败');
  }

  const result = await response.json();
  return result.data;
}

/**
 * 获取所有可用模块列表
 */
export async function fetchModuleList(): Promise<ModuleInfo[]> {
  const response = await fetch(MODULES_API, {
    method: 'GET',
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '获取模块列表失败');
  }

  const result = await response.json();
  return result.data;
}

// ==================== RVW Config API ====================

/** 租户审稿配置 */
export interface TenantRvwConfig {
  id: string;
  tenantId: string;
  editorialBaseStandard: 'zh' | 'en';
  editorialExpertPrompt: string | null;
  editorialHandlebarsTemplate: string | null;
  methodologyExpertPrompt: string | null;
  methodologyHandlebarsTemplate: string | null;
  dataForensicsExpertPrompt: string | null;
  dataForensicsHandlebarsTemplate: string | null;
  clinicalExpertPrompt: string | null;
  clinicalHandlebarsTemplate: string | null;
  createdAt: string;
  updatedAt: string;
}

/** 更新审稿配置请求 */
export interface UpdateRvwConfigRequest {
  editorialBaseStandard?: 'zh' | 'en';
  editorialExpertPrompt?: string | null;
  editorialHandlebarsTemplate?: string | null;
  methodologyExpertPrompt?: string | null;
  methodologyHandlebarsTemplate?: string | null;
  dataForensicsExpertPrompt?: string | null;
  dataForensicsHandlebarsTemplate?: string | null;
  clinicalExpertPrompt?: string | null;
  clinicalHandlebarsTemplate?: string | null;
}

/**
 * 获取租户智能审稿配置
 */
export async function fetchRvwConfig(tenantId: string): Promise<TenantRvwConfig | null> {
  const response = await fetch(`${API_BASE}/${tenantId}/rvw-config`, {
    headers: getAuthHeaders(),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '获取审稿配置失败');
  }

  const result = await response.json();
  return result.data;
}

/**
 * 保存（UPSERT）租户智能审稿配置
 */
export async function saveRvwConfig(tenantId: string, data: UpdateRvwConfigRequest): Promise<TenantRvwConfig> {
  const response = await fetch(`${API_BASE}/${tenantId}/rvw-config`, {
    method: 'PUT',
    headers: getAuthHeaders(),
    body: JSON.stringify(data),
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.message || '保存审稿配置失败');
  }

  const result = await response.json();
  return result.data;
}