import type { AffinityRule, AffinityLevel } from "./types"
import { apiClient } from "./client"
import type { PaginatedResponse, PaginationParams } from "./client"

// 将后端 AffinityRule 数据映射到前端类型
function mapBackendRule(r: any): AffinityRule {
  return {
    id: String(r.id),
    action: r.name,
    points: r.points || 0,
    description: r.description || "",
    dailyLimit: r.daily_limit ?? undefined,
  }
}

// 将后端 AffinityLevel 数据映射到前端类型
function mapBackendLevel(l: any): AffinityLevel {
  return {
    id: String(l.id),
    level: l.level,
    name: l.name,
    description: l.description || "",
    requiredPoints: l.required_points,
    rewards: Array.isArray(l.rewards) ? l.rewards : [],
  }
}

// ── 好感度规则 ────────────────────────────────────────────

export const getAffinityRules = async (params?: PaginationParams): Promise<PaginatedResponse<AffinityRule>> => {
  const page = params?.page || 1
  const pageSize = params?.pageSize || 10

  const response = await apiClient.get(`/user/affinity-rules/?page=${page}&page_size=${pageSize}`)
  const data = response.data?.data || response.data
  const results: any[] = data.results || (Array.isArray(data) ? data : [])
  const total = data.count || results.length

  return {
    items: results.map(mapBackendRule),
    total,
    page,
    pageSize,
    totalPages: Math.ceil(total / pageSize),
  }
}

export const getAffinityRule = async (id: string): Promise<AffinityRule> => {
  const response = await apiClient.get(`/user/affinity-rules/${id}/`)
  const data = response.data?.data || response.data
  return mapBackendRule(data)
}

export const createAffinityRule = async (ruleData: Partial<AffinityRule>): Promise<AffinityRule> => {
  const payload = {
    name: ruleData.action,
    description: ruleData.description || "",
    points: ruleData.points || 0,
    daily_limit: ruleData.dailyLimit ?? null,
    is_active: true,
  }
  const response = await apiClient.post(`/user/affinity-rules/`, payload)
  const data = response.data?.data || response.data
  return mapBackendRule(data)
}

export const updateAffinityRule = async (id: string, ruleData: Partial<AffinityRule>): Promise<AffinityRule> => {
  const payload: any = {}
  if (ruleData.action !== undefined) payload.name = ruleData.action
  if (ruleData.description !== undefined) payload.description = ruleData.description
  if (ruleData.points !== undefined) payload.points = ruleData.points
  if (ruleData.dailyLimit !== undefined) payload.daily_limit = ruleData.dailyLimit

  const response = await apiClient.patch(`/user/affinity-rules/${id}/`, payload)
  const data = response.data?.data || response.data
  return mapBackendRule(data)
}

export const deleteAffinityRule = async (id: string): Promise<boolean> => {
  await apiClient.delete(`/user/affinity-rules/${id}/`)
  return true
}

// ── 好感度等级 ────────────────────────────────────────────

export const getAffinityLevels = async (params?: PaginationParams): Promise<PaginatedResponse<AffinityLevel>> => {
  const page = params?.page || 1
  const pageSize = params?.pageSize || 50  // 等级数量通常较少，一次全取

  const response = await apiClient.get(`/user/affinity-levels/?page=${page}&page_size=${pageSize}`)
  const data = response.data?.data || response.data
  const results: any[] = data.results || (Array.isArray(data) ? data : [])
  const total = data.count || results.length

  return {
    items: results.map(mapBackendLevel),
    total,
    page,
    pageSize,
    totalPages: Math.ceil(total / pageSize),
  }
}

export const getAffinityLevel = async (id: string): Promise<AffinityLevel> => {
  const response = await apiClient.get(`/user/affinity-levels/${id}/`)
  const data = response.data?.data || response.data
  return mapBackendLevel(data)
}

export const createAffinityLevel = async (levelData: Partial<AffinityLevel>): Promise<AffinityLevel> => {
  const payload = {
    level: levelData.level,
    name: levelData.name,
    description: levelData.description || "",
    required_points: levelData.requiredPoints || 0,
    rewards: levelData.rewards || [],
  }
  const response = await apiClient.post(`/user/affinity-levels/`, payload)
  const data = response.data?.data || response.data
  return mapBackendLevel(data)
}

export const updateAffinityLevel = async (id: string, levelData: Partial<AffinityLevel>): Promise<AffinityLevel> => {
  const payload: any = {}
  if (levelData.name !== undefined) payload.name = levelData.name
  if (levelData.description !== undefined) payload.description = levelData.description
  if (levelData.requiredPoints !== undefined) payload.required_points = levelData.requiredPoints
  if (levelData.rewards !== undefined) payload.rewards = levelData.rewards

  const response = await apiClient.patch(`/user/affinity-levels/${id}/`, payload)
  const data = response.data?.data || response.data
  return mapBackendLevel(data)
}

export const deleteAffinityLevel = async (id: string): Promise<boolean> => {
  await apiClient.delete(`/user/affinity-levels/${id}/`)
  return true
}