import { getReadingPlatformAPI } from './generated';
import { axios } from './generated/mutator';

// 创建 API 实例
const api = getReadingPlatformAPI();

// ============= 类型定义（保持向后兼容） =============

export interface CourseQueryParams {
  pageNum?: number;
  pageSize?: number;
  grade?: string;
  status?: string;
  keyword?: string;
  /** 审核管理页专用：仅返回待审核和已驳回，排除已通过 */
  reviewOnly?: boolean;
}

export interface Course {
  id: number;
  name: string;
  description?: string;
  pictureBookName?: string;
  grades: string[];
  status: string;
  version: string;
  usageCount: number;
  teacherCount: number;
  avgRating: number;
  createdAt: Date;
  updatedAt: Date;
  submittedAt?: Date;
  reviewedAt?: Date;
  reviewComment?: string;
  // 新增字段
  themeId?: number;
  theme?: { id: number; name: string };
  coreContent?: string;
  coverImagePath?: string;
  domainTags?: string[];
  gradeTags?: string[];
  duration?: number;
  // 课程介绍字段
  introSummary?: string;
  introHighlights?: string;
  introGoals?: string;
  introSchedule?: string;
  introKeyPoints?: string;
  introMethods?: string;
  introEvaluation?: string;
  introNotes?: string;
  // 排课计划参考
  scheduleRefData?: string;
  // 环创建设
  environmentConstruction?: string;
  // 关联课程
  courseLessons?: CourseLesson[];
}

export interface CourseLesson {
  id: number;
  courseId: number;
  lessonType: string;
  name: string;
  description?: string;
  duration: number;
  videoPath?: string;
  videoName?: string;
  pptPath?: string;
  pptName?: string;
  pdfPath?: string;
  pdfName?: string;
  objectives?: string;
  preparation?: string;
  extension?: string;
  reflection?: string;
  assessmentData?: string;
  useTemplate: boolean;
  sortOrder: number;
  steps?: LessonStep[];
}

export interface LessonStep {
  id: number;
  lessonId: number;
  name: string;
  content?: string;
  duration: number;
  objective?: string;
  resourceIds?: string;
  sortOrder: number;
}

export interface ValidationResult {
  valid: boolean;
  errors: ValidationError[];
  warnings: ValidationWarning[];
}

export interface ValidationError {
  field: string;
  message: string;
  code: string;
}

export interface ValidationWarning {
  field: string;
  message: string;
  code: string;
}

// ============= API 函数（使用生成的客户端） =============

// 转换查询参数类型
const toFindAllParams = (params: CourseQueryParams): any => ({
  pageNum: params.pageNum ?? 1,
  pageSize: params.pageSize ?? 10,
  keyword: params.keyword,
  category: params.grade,
  status: params.status || undefined,
  reviewOnly: params.reviewOnly,
});

// 后端 PageResult 返回 list，前端统一转为 items
function normalizePageResult(raw: any): {
  items: Course[];
  total: number;
  page: number;
  pageSize: number;
} {
  const list = raw?.list ?? raw?.items ?? [];
  return {
    items: Array.isArray(list) ? list : [],
    total: raw?.total ?? 0,
    page: raw?.pageNum ?? raw?.page ?? 1,
    pageSize: raw?.pageSize ?? 10,
  };
}

// 获取课程包列表
export function getCourses(params: CourseQueryParams): Promise<{
  items: Course[];
  total: number;
  page: number;
  pageSize: number;
}> {
  return api.getCoursePage1(toFindAllParams(params)).then(normalizePageResult) as any;
}

// 获取审核列表（仅返回待审核和已驳回，不含已通过）
export function getReviewList(params: CourseQueryParams): Promise<{
  items: Course[];
  total: number;
  page: number;
  pageSize: number;
}> {
  return api.getCoursePage1(toFindAllParams({ ...params, reviewOnly: true })).then(normalizePageResult) as any;
}

// 获取课程包详情（id 支持 number | string，避免大整数精度丢失）
export function getCourse(id: number | string): Promise<any> {
  return api.getCourse1(id as number) as any;
}

// 创建课程包
export function createCourse(data: any): Promise<any> {
  return api.createCourse(data) as any;
}

// 更新课程包
export function updateCourse(id: number | string, data: any): Promise<any> {
  return api.updateCourse(id as number, data) as any;
}

// 删除课程包
export function deleteCourse(id: number | string): Promise<any> {
  return api.deleteCourse(id as number) as any;
}

// 验证课程完整性 (暂时返回 true，后端可能没有此接口)
export function validateCourse(id: number): Promise<ValidationResult> {
  return Promise.resolve({ valid: true, errors: [], warnings: [] });
}

// 提交审核
export function submitCourse(id: number, copyrightConfirmed?: boolean): Promise<any> {
  return api.submit(id) as any;
}

// 撤销审核 (暂时使用更新接口，需要确认后端是否有此功能)
export function withdrawCourse(id: number): Promise<any> {
  return api.updateCourse(id, { status: 'DRAFT' }) as any;
}

// 审核通过
export function approveCourse(id: number, data: { checklist?: any; comment?: string }): Promise<any> {
  return api.publishCourse(id) as any;
}

// 审核驳回（课程专用，调用 POST /api/v1/admin/courses/{id}/reject）
export function rejectCourse(id: number, data: { checklist?: any; comment: string }): Promise<any> {
  return axios.post(`/api/v1/admin/courses/${id}/reject`, { comment: data.comment }).then((res: any) => {
    const body = res?.data;
    if (body && typeof body === 'object' && 'code' in body && body.code !== 200 && body.code !== 0) {
      throw new Error(body.message || '驳回失败');
    }
    return body?.data;
  });
}

// 直接发布（超级管理员）
export function directPublishCourse(id: number, skipValidation?: boolean): Promise<any> {
  return api.publishCourse(id) as any;
}

// 发布课程包
export function publishCourse(id: number): Promise<any> {
  return api.publishCourse(id) as any;
}

// 下架课程包
export function unpublishCourse(id: number): Promise<any> {
  return api.archiveCourse(id) as any;
}

// 重新发布 (使用发布接口)
export function republishCourse(id: number): Promise<any> {
  return api.publishCourse(id) as any;
}

// 获取课程包统计数据 (暂时返回空对象)
export function getCourseStats(id: number | string): Promise<any> {
  return Promise.resolve({});
}

// 获取版本历史 (暂时返回空数组)
export function getCourseVersions(id: number): Promise<any[]> {
  return Promise.resolve([]);
}

// ============= 常量 =============

// 课程状态映射
export const COURSE_STATUS_MAP: Record<string, { label: string; color: string }> = {
  DRAFT: { label: '草稿', color: 'default' },
  PENDING: { label: '审核中', color: 'processing' },
  REJECTED: { label: '已驳回', color: 'error' },
  PUBLISHED: { label: '已发布', color: 'success' },
  ARCHIVED: { label: '已下架', color: 'warning' },
};

// 获取状态显示信息
export function getCourseStatusInfo(status: string) {
  return COURSE_STATUS_MAP[status] || { label: status, color: 'default' };
}