"use client"

import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group"
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"
import { Separator } from "@/components/ui/separator"
import { Switch } from "@/components/ui/switch"
import { Textarea } from "@/components/ui/textarea"
import { getCurrentUserForLogin, switchCurrentRole, updateCurrentUser, uploadFile } from "@/lib/api"
import { toApiError } from "@/lib/errors"
import { notifyInfo, notifySuccess } from "@/lib/toast"
import type { UserRole } from "@/lib/types"
import type { ThemePreference } from "@/store/auth"
import { useAuthStore } from "@/store/auth"
import { Camera } from "lucide-react"
import { useTheme } from "next-themes"
import Link from "next/link"
import { useRef, useState } from "react"

export default function SettingsPage() {
  const { currentRole, verifiedRoles, user, login, notificationPrefs, setNotificationPref } =
    useAuthStore()
  const [nickname, setNickname] = useState(user?.nickname ?? "")
  const [bio, setBio] = useState(user?.bio ?? "")
  const [avatar, setAvatar] = useState(user?.avatar ?? "")
  const [uploadingAvatar, setUploadingAvatar] = useState(false)
  const fileRef = useRef<HTMLInputElement>(null)

  const isRoleVerified = (role: UserRole) => verifiedRoles.includes(role)
  const { theme, setTheme } = useTheme()
  const setThemePreference = useAuthStore((s) => s.setThemePreference)

  function handleThemeChange(value: string) {
    const pref = value as ThemePreference
    setTheme(pref)
    setThemePreference(pref)
  }

  async function handleAvatarFile(file: File, resetInput: () => void) {
    setUploadingAvatar(true)
    try {
      const url = await uploadFile(file, "avatar")
      setAvatar(url)
      notifySuccess("头像已上传")
    } catch (error) {
      notifyInfo(toApiError(error).msg)
    } finally {
      setUploadingAvatar(false)
      resetInput()
    }
  }

  async function handleProfileSave() {
    if (!user) {
      notifyInfo("请先登录")
      return
    }

    try {
      const updated = await updateCurrentUser({
        nickname: nickname.trim() || user.nickname,
        bio: bio.trim(),
        avatar,
      })
      login(updated, updated.verifiedRoles ?? [updated.role])
      notifySuccess("资料已保存")
    } catch (error) {
      notifyInfo(toApiError(error).msg)
    }
  }

  async function handleRoleChange(value: string) {
    const role = value as UserRole
    if (!isRoleVerified(role) || role === currentRole) return

    try {
      await switchCurrentRole(role)
      const updated = await getCurrentUserForLogin()
      login(updated, updated.verifiedRoles ?? [updated.role])
      notifySuccess("身份已切换")
    } catch (error) {
      notifyInfo(toApiError(error).msg)
    }
  }

  return (
    <div className="container mx-auto max-w-2xl px-4 py-8 space-y-6">
      <h1 className="text-2xl font-bold">个人设置</h1>

      <Card>
        <CardHeader>
          <CardTitle className="text-base">头像</CardTitle>
        </CardHeader>
        <CardContent className="flex items-center gap-4">
          <div className="relative">
            <Avatar className="h-20 w-20">
              <AvatarImage src={avatar} />
              <AvatarFallback className="text-lg">{user?.nickname?.[0] ?? "?"}</AvatarFallback>
            </Avatar>
            <input
              ref={fileRef}
              type="file"
              accept="image/*"
              className="hidden"
              onChange={(event) => {
                const target = event.currentTarget
                const file = target.files?.[0]
                if (!file) return
                void handleAvatarFile(file, () => {
                  target.value = ""
                })
              }}
            />
            <button
              type="button"
              disabled={uploadingAvatar}
              className="absolute bottom-0 right-0 h-7 w-7 rounded-full bg-primary text-primary-foreground flex items-center justify-center"
              onClick={() => fileRef.current?.click()}
            >
              <Camera className="h-3.5 w-3.5" />
            </button>
          </div>
          <p className="text-sm text-muted-foreground">
            {uploadingAvatar ? "头像上传中..." : "点击上传头像，支持 JPG、PNG 格式"}
          </p>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle className="text-base">基本信息</CardTitle>
        </CardHeader>
        <CardContent className="space-y-4">
          <div className="space-y-2">
            <Label htmlFor="nickname">昵称</Label>
            <Input
              id="nickname"
              value={nickname}
              onChange={(event) => setNickname(event.target.value)}
            />
          </div>
          <div className="space-y-2">
            <Label htmlFor="bio">个人简介</Label>
            <Textarea
              id="bio"
              value={bio}
              onChange={(event) => setBio(event.target.value)}
              rows={3}
            />
          </div>
          <div className="space-y-2">
            <Label htmlFor="phone">手机号</Label>
            <Input id="phone" defaultValue={user?.phone ?? ""} disabled />
            <p className="text-xs text-muted-foreground">如需更换手机号请联系客服</p>
          </div>
          <Button
            onClick={() => {
              void handleProfileSave()
            }}
          >
            保存修改
          </Button>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle className="text-base">身份切换</CardTitle>
        </CardHeader>
        <CardContent className="space-y-3">
          <p className="text-sm text-muted-foreground">切换身份后,导航和功能将对应变化</p>
          <RadioGroup
            value={currentRole}
            onValueChange={(v) => {
              void handleRoleChange(v)
            }}
          >
            <div className="flex items-center justify-between">
              <div className="flex items-center space-x-2">
                <RadioGroupItem value="consumer" id="role-consumer" />
                <Label htmlFor="role-consumer">客户</Label>
              </div>
            </div>
            <div className="flex items-center justify-between">
              <div className="flex items-center space-x-2">
                <RadioGroupItem
                  value="player"
                  id="role-player"
                  disabled={!isRoleVerified("player")}
                />
                <Label
                  htmlFor="role-player"
                  className={!isRoleVerified("player") ? "text-muted-foreground" : ""}
                >
                  打手
                </Label>
              </div>
              {!isRoleVerified("player") && (
                <Link href="/verify" className="text-sm text-primary hover:underline">
                  去认证
                </Link>
              )}
            </div>
            <div className="flex items-center justify-between">
              <div className="flex items-center space-x-2">
                <RadioGroupItem value="owner" id="role-owner" disabled={!isRoleVerified("owner")} />
                <Label
                  htmlFor="role-owner"
                  className={!isRoleVerified("owner") ? "text-muted-foreground" : ""}
                >
                  店主
                </Label>
              </div>
              {!isRoleVerified("owner") && (
                <Link href="/verify" className="text-sm text-primary hover:underline">
                  去认证
                </Link>
              )}
            </div>
          </RadioGroup>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle className="text-base">外观设置</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="flex items-center justify-between">
            <Label>主题模式</Label>
            <Select value={theme} onValueChange={handleThemeChange}>
              <SelectTrigger className="w-32">
                <SelectValue placeholder="选择主题" />
              </SelectTrigger>
              <SelectContent>
                <SelectItem value="light">浅色模式</SelectItem>
                <SelectItem value="dark">深色模式</SelectItem>
                <SelectItem value="system">跟随系统</SelectItem>
              </SelectContent>
            </Select>
          </div>
        </CardContent>
      </Card>

      <Card>
        <CardHeader>
          <CardTitle className="text-base">通知偏好</CardTitle>
        </CardHeader>
        <CardContent className="space-y-4">
          <div className="flex items-center justify-between">
            <div>
              <p className="text-sm font-medium">订单通知</p>
              <p className="text-xs text-muted-foreground">接单、完成、争议等状态变更</p>
            </div>
            <Switch
              checked={notificationPrefs.order}
              onCheckedChange={(checked) => setNotificationPref("order", checked)}
            />
          </div>
          <Separator />
          <div className="flex items-center justify-between">
            <div>
              <p className="text-sm font-medium">社区通知</p>
              <p className="text-xs text-muted-foreground">点赞、评论、关注</p>
            </div>
            <Switch
              checked={notificationPrefs.community}
              onCheckedChange={(checked) => setNotificationPref("community", checked)}
            />
          </div>
          <Separator />
          <div className="flex items-center justify-between">
            <div>
              <p className="text-sm font-medium">系统通知</p>
              <p className="text-xs text-muted-foreground">平台公告、活动推送</p>
            </div>
            <Switch
              checked={notificationPrefs.system}
              onCheckedChange={(checked) => setNotificationPref("system", checked)}
            />
          </div>
        </CardContent>
      </Card>
    </div>
  )
}