import { request } from '../utils/request'
import type {
  Question,
  SubmitAnswer,
  AnswerResult,
  Statistics,
  ApiResponse,
  WrongQuestion,
  WrongQuestionStats,
  WrongQuestionFilter
} from '../types/question'

// 获取题目列表
export const getQuestions = (params?: { type?: string; search?: string }) => {
  return request.get<ApiResponse<Question[]>>('/practice/questions', { params })
}

// 获取指定题目
export const getQuestionById = (id: number) => {
  return request.get<ApiResponse<Question>>(`/practice/questions/${id}`)
}

// 提交答案
export const submitAnswer = (data: SubmitAnswer) => {
  return request.post<ApiResponse<AnswerResult>>('/practice/submit', data)
}

// 获取统计数据
export const getStatistics = () => {
  return request.get<ApiResponse<Statistics>>('/practice/statistics')
}

// ========== 练习进度相关 API ==========

// 答题记录
export interface AnsweredQuestion {
  question_id: number
  record_id: number
  is_correct: boolean
  user_answer: any
  correct_answer: any  // 正确答案
  answered_at: string
  // AI 评分相关（仅简答题有值）
  ai_score?: number
  ai_feedback?: string
  ai_suggestion?: string
}

// 进度数据（按题目类型）
export interface PracticeProgressData {
  type: string
  current_question_id: number
  answered_questions: AnsweredQuestion[]
}

// 获取练习进度（可选type参数）
export const getPracticeProgress = (type?: string) => {
  const params = type ? { type } : undefined
  return request.get<ApiResponse<PracticeProgressData[]>>('/practice/progress', { params })
}

// 清除练习进度（可选type参数，指定类型则只清除该类型的进度）
export const clearPracticeProgress = (type?: string) => {
  const params = type ? { type } : undefined
  return request.delete<ApiResponse<null>>('/practice/progress', { params })
}

// 重置进度 (暂时返回模拟数据，后续实现)
export const resetProgress = async () => {
  // TODO: 实现真实的重置接口
  return {
    success: true,
    data: null
  }
}

// ========== 错题本相关 API ==========

// 获取错题列表（支持筛选和排序）
export const getWrongQuestions = (filter?: WrongQuestionFilter) => {
  const params: Record<string, string> = {}
  if (filter?.is_mastered !== undefined) {
    params.is_mastered = filter.is_mastered ? 'true' : 'false'
  }
  if (filter?.tag) params.tag = filter.tag
  if (filter?.type) params.type = filter.type
  if (filter?.sort) params.sort = filter.sort

  return request.get<ApiResponse<WrongQuestion[]>>('/wrong-questions', { params })
}

// 获取错题详情（包含完整历史）
export const getWrongQuestionDetail = (id: number) => {
  return request.get<ApiResponse<WrongQuestion>>(`/wrong-questions/${id}`)
}

// 获取错题统计（含趋势数据）
export const getWrongQuestionStats = () => {
  return request.get<ApiResponse<WrongQuestionStats>>('/wrong-questions/stats')
}

// 获取推荐练习的错题（智能推荐）
export const getRecommendedWrongQuestions = (limit: number = 10, excludeQuestionID?: number) => {
  const params: Record<string, any> = { limit }
  if (excludeQuestionID) {
    params.exclude = excludeQuestionID
  }
  return request.get<ApiResponse<WrongQuestion[]>>('/wrong-questions/recommended', {
    params
  })
}

// 删除错题
export const deleteWrongQuestion = (id: number) => {
  return request.delete<ApiResponse<null>>(`/wrong-questions/${id}`)
}

// 清空错题本
export const clearWrongQuestions = () => {
  return request.delete<ApiResponse<null>>('/wrong-questions')
}

// ========== 题库管理相关 API ==========

// 创建题目
export const createQuestion = (data: {
  type: string
  type_name?: string
  question: string
  answer: any
  options?: Record<string, string>
}) => {
  return request.post<ApiResponse<Question>>('/practice/questions', data)
}

// 更新题目
export const updateQuestion = (id: number, data: {
  type?: string
  type_name?: string
  question?: string
  answer?: any
  options?: Record<string, string>
}) => {
  return request.put<ApiResponse<Question>>(`/practice/questions/${id}`, data)
}

// 删除题目
export const deleteQuestion = (id: number) => {
  return request.delete<ApiResponse<null>>(`/practice/questions/${id}`)
}

// 获取题目解析（AI）
export const explainQuestion = (questionId: number) => {
  return request.post<ApiResponse<{ explanation: string }>>('/practice/explain', { question_id: questionId })
}

// ========== 用户管理相关 API（仅管理员） ==========

// 用户统计信息
export interface UserStats {
  user_id: number
  username: string
  nickname: string
  avatar: string
  user_type: string
  total_answers: number
  correct_count: number
  wrong_count: number
  accuracy: number
  created_at: string
  last_answer_at?: string
}

// 用户详细统计
export interface UserDetailStats {
  user_info: UserStats
  type_stats: Array<{
    question_type: string
    question_type_name: string
    total_answers: number
    correct_count: number
    accuracy: number
  }>
}

// 获取所有用户及统计（仅yanlongqi用户可访问）
export const getAllUsersWithStats = () => {
  return request.get<ApiResponse<UserStats[]>>('/admin/users')
}

// 获取用户详细统计（仅yanlongqi用户可访问）
export const getUserDetailStats = (userId: number) => {
  return request.get<ApiResponse<UserDetailStats>>(`/admin/users/${userId}`)
}

// ========== 排行榜相关 API ==========

// 获取今日排行榜
export const getDailyRanking = (limit: number = 10) => {
  return request.get<ApiResponse<UserStats[]>>('/ranking/daily', { params: { limit } })
}

// 获取总排行榜
export const getTotalRanking = (limit: number = 10) => {
  return request.get<ApiResponse<UserStats[]>>('/ranking/total', { params: { limit } })
}