import { defineStore } from 'pinia'
import { ref, computed } from 'vue'

export interface User {
  id: string
  name: string
  email: string
  avatar?: string
}

export const useUserStore = defineStore('user', () => {
  const user = ref<User | null>(null)
  const isAuthenticated = computed(() => user.value !== null)

  // 登录
  const login = async (account: string, password: string) => {
    try {
      // 模拟 API 调用 - 你需要替换为真实的登录 API
      // const response = await $fetch('/api/auth/login', {
      //   method: 'POST',
      //   body: { account, password }
      // })

      // 模拟延迟
      await new Promise(resolve => setTimeout(resolve, 1000))

      // 判断账号类型并提取用户名
      let username = account
      if (account.includes('@')) {
        // 邮箱：使用 @ 前面的部分
        username = account.split('@')[0]
      } else if (/^1[3-9]\d{9}$/.test(account)) {
        // 手机号：使用后4位
        username = 'User_' + account.slice(-4)
      }
      // 其他情况：直接使用账号作为用户名

      // 模拟成功登录
      user.value = {
        id: '1',
        name: username,
        email: account.includes('@') ? account : `${account}@example.com`,
        avatar: `https://ui-avatars.com/api/?name=${encodeURIComponent(username)}&background=000&color=fff&size=128`
      }

      // 保存到 localStorage
      if (typeof window !== 'undefined') {
        localStorage.setItem('user', JSON.stringify(user.value))
      }

      return { success: true }
    } catch (error) {
      console.error('Login error:', error)
      return { success: false, error: 'Login failed' }
    }
  }

  // 登出
  const logout = () => {
    user.value = null
    if (typeof window !== 'undefined') {
      localStorage.removeItem('user')
    }
  }

  // 注册
  const register = async (data: { username: string; email: string; phone?: string; password: string }) => {
    try {
      // 模拟 API 调用 - 你需要替换为真实的注册 API
      // const response = await $fetch('/api/auth/register', {
      //   method: 'POST',
      //   body: data
      // })

      // 模拟延迟
      await new Promise(resolve => setTimeout(resolve, 1000))

      // 模拟成功注册并自动登录
      user.value = {
        id: Date.now().toString(),
        name: data.username,
        email: data.email,
        avatar: `https://ui-avatars.com/api/?name=${encodeURIComponent(data.username)}&background=000&color=fff&size=128`
      }

      // 保存到 localStorage
      if (typeof window !== 'undefined') {
        localStorage.setItem('user', JSON.stringify(user.value))
      }

      return { success: true }
    } catch (error) {
      console.error('Register error:', error)
      return { success: false, error: 'Registration failed' }
    }
  }

  // 从 localStorage 恢复用户状态
  const restoreUser = () => {
    if (typeof window !== 'undefined') {
      const savedUser = localStorage.getItem('user')
      if (savedUser) {
        try {
          user.value = JSON.parse(savedUser)
        } catch (error) {
          console.error('Failed to restore user:', error)
          localStorage.removeItem('user')
        }
      }
    }
  }

  return {
    user,
    isAuthenticated,
    login,
    logout,
    register,
    restoreUser,
  }
})