<?php

namespace app\controller\admin;

use support\Request;
use support\think\Db;

class UsersController
{
    public function overview(Request $request)
    {
        $this->ensurePasswordColumn();
        return api_success([
            'cards' => [
                [
                    'title' => '用户总量',
                    'value' => (int)Db::name('users')->count(),
                    'desc' => '当前数据库中的用户数量',
                ],
                [
                    'title' => '正常用户',
                    'value' => (int)Db::name('users')->where('status', 'enabled')->count(),
                    'desc' => '当前可正常使用系统的用户数量',
                ],
                [
                    'title' => '地址数量',
                    'value' => (int)Db::name('user_addresses')->count(),
                    'desc' => '用户维护的寄送与收货地址总数',
                ],
                [
                    'title' => '消息总量',
                    'value' => (int)Db::name('user_messages')->count(),
                    'desc' => '已发送给用户的站内消息数量',
                ],
            ],
        ]);
    }

    public function index(Request $request)
    {
        $this->ensurePasswordColumn();
        $keyword = trim((string)$request->input('keyword', ''));
        $status = trim((string)$request->input('status', ''));

        $query = Db::name('users')
            ->alias('u')
            ->leftJoin('user_addresses a', 'a.user_id = u.id AND a.is_default = 1')
            ->field([
                'u.id',
                'u.nickname',
                'u.mobile',
                'u.password',
                'u.status',
                'u.created_at',
                'u.updated_at',
                'a.province',
                'a.city',
                'a.district',
                'a.detail_address',
            ])
            ->order('u.id', 'desc');

        if ($keyword !== '') {
            $query->where(function ($builder) use ($keyword) {
                $builder->whereLike('u.nickname', "%{$keyword}%")
                    ->whereOrLike('u.mobile', "%{$keyword}%");
            });
        }

        if ($status !== '') {
            $query->where('u.status', $status);
        }

        $rows = $query->select()->toArray();

        $list = array_map(function (array $item) {
            $userId = (int)$item['id'];

            return [
                'id' => $userId,
                'nickname' => $item['nickname'] ?: '未命名用户',
                'mobile' => $item['mobile'] ?: '',
                'status' => $item['status'],
                'status_text' => $this->userStatusText($item['status']),
                'password_set' => ((string)($item['password'] ?? '')) !== '',
                'default_address' => trim(sprintf(
                    '%s%s%s%s',
                    $item['province'] ?? '',
                    $item['city'] ?? '',
                    $item['district'] ?? '',
                    $item['detail_address'] ?? ''
                )),
                'order_count' => (int)Db::name('orders')->where('user_id', $userId)->count(),
                'message_count' => (int)Db::name('user_messages')->where('user_id', $userId)->count(),
                'ticket_count' => (int)Db::name('tickets')->where('user_id', $userId)->count(),
                'created_at' => $item['created_at'],
                'updated_at' => $item['updated_at'],
            ];
        }, $rows);

        return api_success(['list' => $list]);
    }

    public function detail(Request $request)
    {
        $this->ensurePasswordColumn();
        $id = (int)$request->input('id', 0);
        if ($id <= 0) {
            return api_error('用户 ID 不能为空', 422);
        }

        $user = Db::name('users')->where('id', $id)->find();
        if (!$user) {
            return api_error('用户不存在', 404);
        }

        $addresses = Db::name('user_addresses')
            ->where('user_id', $id)
            ->order('is_default', 'desc')
            ->order('id', 'desc')
            ->select()
            ->toArray();

        $recentOrders = Db::name('orders')
            ->where('user_id', $id)
            ->order('id', 'desc')
            ->limit(5)
            ->select()
            ->toArray();

        $recentMessages = Db::name('user_messages')
            ->where('user_id', $id)
            ->order('id', 'desc')
            ->limit(5)
            ->select()
            ->toArray();

        return api_success([
            'user_info' => [
                'id' => (int)$user['id'],
                'nickname' => $user['nickname'] ?: '未命名用户',
                'mobile' => $user['mobile'] ?: '',
                'status' => $user['status'],
                'status_text' => $this->userStatusText($user['status']),
                'password_set' => ((string)($user['password'] ?? '')) !== '',
                'created_at' => $user['created_at'],
                'updated_at' => $user['updated_at'],
            ],
            'addresses' => array_map(fn (array $item) => [
                'consignee' => $item['consignee'],
                'mobile' => $item['mobile'],
                'full_address' => trim(sprintf('%s%s%s%s', $item['province'], $item['city'], $item['district'], $item['detail_address'])),
                'is_default' => (bool)$item['is_default'],
            ], $addresses),
            'recent_orders' => array_map(fn (array $item) => [
                'order_no' => $item['order_no'],
                'display_status' => $item['display_status'],
                'pay_amount' => (float)$item['pay_amount'],
                'created_at' => $item['created_at'],
            ], $recentOrders),
            'recent_messages' => array_map(fn (array $item) => [
                'title' => $item['title'],
                'content' => $item['content'],
                'is_read' => (bool)$item['is_read'],
                'created_at' => $item['created_at'],
            ], $recentMessages),
        ]);
    }

    public function save(Request $request)
    {
        $this->ensurePasswordColumn();
        $id = (int)$request->input('id', 0);
        $nickname = trim((string)$request->input('nickname', ''));
        $mobile = trim((string)$request->input('mobile', ''));
        $status = trim((string)$request->input('status', 'enabled'));
        $password = trim((string)$request->input('password', ''));

        if ($nickname === '' || $mobile === '') {
            return api_error('昵称和手机号不能为空', 422);
        }

        $now = date('Y-m-d H:i:s');
        $payload = [
            'nickname' => $nickname,
            'mobile' => $mobile,
            'status' => $status !== '' ? $status : 'enabled',
            'updated_at' => $now,
        ];
        if ($password !== '') {
            $payload['password'] = password_hash($password, PASSWORD_BCRYPT);
        }

        if ($id > 0) {
            $user = Db::name('users')->where('id', $id)->find();
            if (!$user) {
                return api_error('用户不存在', 404);
            }

            $exists = Db::name('users')
                ->where('mobile', $mobile)
                ->where('id', '<>', $id)
                ->find();
            if ($exists) {
                return api_error('手机号已存在', 422);
            }

            Db::name('users')->where('id', $id)->update($payload);
            return api_success(['id' => $id], '用户已更新');
        }

        $exists = Db::name('users')->where('mobile', $mobile)->find();
        if ($exists) {
            return api_error('手机号已存在', 422);
        }

        $payload['avatar'] = '';
        $payload['password'] = $payload['password'] ?? '';
        $payload['last_login_at'] = null;
        $payload['created_at'] = $now;
        $newId = (int)Db::name('users')->insertGetId($payload);

        return api_success(['id' => $newId], '用户已创建');
    }

    private function userStatusText(string $status): string
    {
        return match ($status) {
            'enabled' => '正常',
            'disabled' => '已停用',
            default => $status,
        };
    }

    private function ensurePasswordColumn(): void
    {
        $column = Db::query("SHOW COLUMNS FROM users LIKE 'password'");
        if ($column) {
            return;
        }

        Db::execute("ALTER TABLE users ADD COLUMN password VARCHAR(255) NOT NULL DEFAULT '' AFTER mobile");
    }
}