<?php

namespace app\api\controller;

use think\Db;

/**
 * 用户端 · 信息发布与详情（Module-POST）
 * 路由：
 *   POST   /api/v1/post/create           P1 发布信息
 *   GET    /api/v1/post/drafts           P2 草稿列表
 *   POST   /api/v1/post/draft            P3 保存草稿
 *   DELETE /api/v1/post/:id              P4 删除信息
 *   GET    /api/v1/post/:id              P5 信息详情
 *   POST   /api/v1/post/:id/pay-view     P6 付费查看联系方式
 *   POST   /api/v1/post/:id/comment      P7 发表评价
 */
class Post extends V1
{
    /**
     * P1 发布信息
     * POST /api/v1/post/create
     *   入参 {categoryId,title,content,media[],contact,phone,address,area,price,priceUnit,tags,paid,amount,payType}
     *   →  {postId,auditStatus,order}
     * 规则 BR-03/BR-04/BR-02
     */
    public function create()
    {
        $user = $this->auth();

        $categoryId = (int)$this->input('categoryId', 0);
        $title = trim((string)$this->input('title', ''));
        $content = trim((string)$this->input('content', ''));

        if ($categoryId <= 0) {
            $this->fail('分类不能为空');
        }
        if ($title === '') {
            $this->fail('标题不能为空');
        }
        if ($content === '') {
            $this->fail('内容不能为空');
        }
        if (mb_strlen($title) > 40) {
            $this->fail('标题不能超过 40 字');
        }
        if (mb_strlen($content) > 500) {
            $this->fail('内容不能超过 500 字');
        }

        $phone = trim((string)$this->input('phone', ''));
        if ($phone !== '' && !preg_match('/^1\d{10}$/', $phone)) {
            $this->fail('手机号格式不正确');
        }

        $paid = (bool)$this->input('paid', false);
        $payType = (string)$this->input('payType', '');
        $amount = 0;
        if ($paid) {
            $amount = $this->input('amount', null);
            if ($amount === null || $amount === '') {
                $amount = $this->cfg('fee.singlePost', 5);
            }
            $amount = round((float)$amount, 2);
        }

        $now = time();
        $postId = Db::name('fc_post')->insertGetId([
            'user_id'       => $user['id'],
            'category_id'   => $categoryId,
            'title'         => $title,
            'content'       => $content,
            'cover'         => '',
            'media'         => json_encode($this->mediaArray(), JSON_UNESCAPED_UNICODE),
            'price'         => round((float)$this->input('price', 0), 2),
            'price_unit'    => (string)$this->input('priceUnit', ''),
            'area'          => (string)$this->input('area', ''),
            'address'       => (string)$this->input('address', ''),
            'contact'       => (string)$this->input('contact', ''),
            'phone'         => $phone,
            'wechat'        => '',
            'tags'          => $this->tagsString(),
            'is_paid'       => $paid ? 1 : 0,
            'amount'        => $paid ? $amount : 0,
            'pay_type'      => $paid ? $payType : '',
            'audit_status'  => 0,
            'views'         => 0,
            'likes'         => 0,
            'comment_count' => 0,
            'status'        => 1,
            'createtime'    => $now,
            'updatetime'    => $now,
        ]);

        $order = null;
        if ($paid) {
            $orderNo = $this->orderNo('PO');
            Db::name('fc_order')->insert([
                'order_no'   => $orderNo,
                'user_id'    => $user['id'],
                'type'       => 'post',
                'title'      => $title,
                'amount'     => $amount,
                'pay_type'   => $payType,
                'status'     => 'pending',
                'related_id' => $postId,
                'createtime' => $now,
                'updatetime' => $now,
            ]);
            $order = ['orderNo' => $orderNo, 'amount' => $amount, 'payType' => $payType];
        }

        $this->ok([
            'postId'      => $postId,
            'auditStatus' => 0,
            'order'       => $order,
        ]);
    }

    /**
     * P2 草稿列表
     * GET /api/v1/post/drafts  →  [{draftId,title,content,categoryId,savedAt}]
     */
    public function drafts()
    {
        $user = $this->auth();

        $rows = Db::name('fc_draft')
            ->where('user_id', $user['id'])
            ->order('savedat desc')
            ->select();

        $list = [];
        foreach ($rows as $row) {
            $list[] = [
                'draftId'    => (int)$row['id'],
                'title'      => (string)$row['title'],
                'content'    => (string)$row['content'],
                'categoryId' => (int)$row['category_id'],
                'savedAt'    => $this->iso($row['savedat']),
            ];
        }
        $this->ok($list);
    }

    /**
     * P3 保存草稿
     * POST /api/v1/post/draft  {draftId?,categoryId?,title?,content?,media?,contact?,phone?,address?}
     *   →  {draftId,savedAt,categoryId,title,content}
     */
    public function saveDraft()
    {
        $user = $this->auth();

        $draftId = (int)$this->input('draftId', 0);
        $categoryId = (int)$this->input('categoryId', 0);
        $title = (string)$this->input('title', '');
        $content = (string)$this->input('content', '');
        $now = time();

        $data = [
            'user_id'    => $user['id'],
            'category_id' => $categoryId,
            'title'      => $title,
            'content'    => $content,
            'media'      => json_encode($this->mediaArray(), JSON_UNESCAPED_UNICODE),
            'contact'    => (string)$this->input('contact', ''),
            'phone'      => (string)$this->input('phone', ''),
            'address'    => (string)$this->input('address', ''),
            'savedat'    => $now,
            'updatetime' => $now,
        ];

        if ($draftId > 0) {
            $exist = Db::name('fc_draft')->where('id', $draftId)->find();
            if (!$exist || (int)$exist['user_id'] !== (int)$user['id']) {
                $this->fail('草稿不存在');
            }
            Db::name('fc_draft')->where('id', $draftId)->update($data);
        } else {
            $data['createtime'] = $now;
            $draftId = Db::name('fc_draft')->insertGetId($data);
        }

        $this->ok([
            'draftId'    => $draftId,
            'savedAt'    => $this->iso($now),
            'categoryId' => $categoryId,
            'title'      => $title,
            'content'    => $content,
        ]);
    }

    /**
     * P4 删除信息（软删）
     * DELETE /api/v1/post/:id  →  {deleted:true}
     * 规则：仅能删除本人发布
     */
    public function remove()
    {
        $user = $this->auth();
        $id = $this->routeId();

        $post = Db::name('fc_post')->where('id', $id)->whereNull('deletetime')->find();
        if (!$post) {
            $this->fail('信息不存在', 404);
        }
        if ((int)$post['user_id'] !== (int)$user['id']) {
            $this->fail('无权操作');
        }

        Db::name('fc_post')->where('id', $id)->update([
            'deletetime' => time(),
            'updatetime' => time(),
        ]);

        $this->ok(['deleted' => true]);
    }

    /**
     * P5 信息详情
     * GET /api/v1/post/:id  →  Post 结构（contact 为脱敏串，绝不返回完整手机号）
     * 规则：允许游客；不存在 fail('信息不存在',404)；每次浏览 views+1
     */
    public function detail()
    {
        // GET /post/:id（详情）与 DELETE /post/:id（软删）共用同一路径，
        // PHP 数组键无法为同一路径注册两条规则，故在此按请求方法分派。
        if ($this->request->isDelete()) {
            $this->remove();
        }

        $id = $this->routeId();

        $post = Db::name('fc_post')->where('id', $id)->whereNull('deletetime')->find();
        if (!$post) {
            $this->fail('信息不存在', 404);
        }

        Db::name('fc_post')->where('id', $id)->setInc('views');
        $post['views'] = (int)$post['views'] + 1;

        $this->ok($this->buildPost($post));
    }

    /**
     * P6 付费查看联系方式
     * POST /api/v1/post/:id/pay-view  {payType}
     *   →  {unlocked:true,contact:{phone,wechat}}
     * 规则 BR-05；金额取 fee.payView；会员或已解锁免费
     */
    public function payView()
    {
        $user = $this->auth();
        $id = $this->routeId();

        $payType = (string)$this->input('payType', '');
        if (!in_array($payType, ['wxpay', 'balance'], true)) {
            $this->fail('支付方式不支持');
        }

        $post = Db::name('fc_post')->where('id', $id)->whereNull('deletetime')->find();
        if (!$post) {
            $this->fail('信息不存在', 404);
        }

        $contact = [
            'phone'  => (string)$post['phone'],
            'wechat' => $post['wechat'] !== '' ? (string)$post['wechat'] : ('tongcheng_' . $id),
        ];

        // 已解锁直接返回
        $exist = Db::name('fc_pay_view')
            ->where('user_id', $user['id'])
            ->where('post_id', $id)
            ->find();
        if ($exist) {
            $this->ok(['unlocked' => true, 'contact' => $contact]);
        }

        $amount = round((float)$this->cfg('fee.payView', 2), 2);
        $now = time();

        $ext = $this->ext($user['id']);
        $isMember = (int)$ext['is_member'] === 1
            && (!$ext['member_expiretime'] || $ext['member_expiretime'] > $now);

        $orderId = 0;
        if ($isMember) {
            // 会员免费解锁
            $amount = 0;
            $payType = 'free';
        } elseif ($payType === 'balance') {
            $balance = (float)$user['money'];
            if ($balance < $amount) {
                $this->fail('余额不足');
            }
            $balance = round($balance - $amount, 2);
            Db::name('user')->where('id', $user['id'])->update([
                'money'      => $balance,
                'updatetime' => $now,
            ]);
            $this->flow('expense', '付费查看', $amount, $balance, $id);
        } else {
            // 微信支付：创建已支付订单
            $orderId = Db::name('fc_order')->insertGetId([
                'order_no'   => $this->orderNo('VO'),
                'user_id'    => $user['id'],
                'type'       => 'post',
                'title'      => '付费查看 #' . $id,
                'amount'     => $amount,
                'pay_type'   => $payType,
                'status'     => 'paid',
                'paytime'    => $now,
                'related_id' => $id,
                'createtime' => $now,
                'updatetime' => $now,
            ]);
        }

        Db::name('fc_pay_view')->insert([
            'user_id'    => $user['id'],
            'post_id'    => $id,
            'pay_type'   => $payType,
            'amount'     => $amount,
            'order_id'   => $orderId,
            'createtime' => $now,
        ]);

        $this->ok(['unlocked' => true, 'contact' => $contact]);
    }

    /**
     * P7 发表评价
     * POST /api/v1/post/:id/comment  {score,content}  →  {commentId}
     * 规则 BR-06
     */
    public function comment()
    {
        $user = $this->auth();
        $id = $this->routeId();

        $content = trim((string)$this->input('content', ''));
        if ($content === '') {
            $this->fail('评价内容不能为空');
        }

        $score = (int)$this->input('score', 5);
        if ($score < 1 || $score > 5) {
            $this->fail('评分需在 1-5 之间');
        }

        $post = Db::name('fc_post')->where('id', $id)->whereNull('deletetime')->find();
        if (!$post) {
            $this->fail('信息不存在', 404);
        }

        $now = time();
        $commentId = Db::name('fc_comment')->insertGetId([
            'post_id'    => $id,
            'user_id'    => $user['id'],
            'score'      => $score,
            'content'    => $content,
            'images'     => '',
            'reply'      => '',
            'top'        => 0,
            'status'     => 1,
            'createtime' => $now,
            'updatetime' => $now,
        ]);

        Db::name('fc_post')->where('id', $id)->setInc('comment_count');

        $this->notify(
            $post['user_id'],
            'interact',
            '收到新评价',
            '用户「' . (string)$user['nickname'] . '」评价了您的信息：' . $content
        );

        $this->ok(['commentId' => $commentId]);
    }

    /**
     * 读取路由 :id 参数（兼容 POST 体/查询串传入）
     * @return int
     */
    protected function routeId()
    {
        $id = (int)$this->input('id', 0);
        if ($id <= 0) {
            $id = (int)$this->request->param('id', 0);
        }
        return $id;
    }

    /**
     * media 入参归一化为数组
     * @return array
     */
    protected function mediaArray()
    {
        $media = $this->input('media', []);
        if (is_string($media)) {
            $decoded = json_decode($media, true);
            $media = is_array($decoded) ? $decoded : [];
        }
        return is_array($media) ? array_values($media) : [];
    }

    /**
     * tags 入参归一化为逗号分隔字符串
     * @return string
     */
    protected function tagsString()
    {
        $tags = $this->input('tags', []);
        if (is_array($tags)) {
            $tags = implode(',', $tags);
        }
        return (string)$tags;
    }

    /**
     * 组装 Post 结构（与前端 mock 数据字段严格对齐）
     * @param array $row fc_post 行
     * @return array
     */
    protected function buildPost($row)
    {
        $categoryName = '';
        if (!empty($row['category_id'])) {
            $cat = Db::name('fc_category')->where('id', $row['category_id'])->find();
            if ($cat) {
                $categoryName = (string)$cat['name'];
            }
        }

        $publisher = ['id' => 0, 'name' => '', 'avatar' => '', 'isMerchant' => false, 'verified' => false];
        if (!empty($row['user_id'])) {
            $pub = Db::name('user')->where('id', $row['user_id'])->find();
            if ($pub) {
                $pubExt = Db::name('fc_user_ext')->where('user_id', $pub['id'])->find();
                $isMerchant = $pubExt && (int)$pubExt['user_type'] === 2;
                $publisher = [
                    'id'         => (int)$pub['id'],
                    'name'       => (string)$pub['nickname'],
                    'avatar'     => (string)$pub['avatar'],
                    'isMerchant' => (bool)$isMerchant,
                    'verified'   => (bool)$isMerchant,
                ];
            }
        }

        $tags = [];
        if (!empty($row['tags'])) {
            foreach (explode(',', (string)$row['tags']) as $tag) {
                $tag = trim($tag);
                if ($tag !== '') {
                    $tags[] = $tag;
                }
            }
        }

        return [
            'id'           => (int)$row['id'],
            'categoryId'   => (int)$row['category_id'],
            'categoryName' => $categoryName,
            'title'        => (string)$row['title'],
            'content'      => (string)$row['content'],
            'cover'        => (string)$row['cover'],
            'price'        => (float)$row['price'],
            'priceUnit'    => (string)$row['price_unit'],
            'area'         => (string)$row['area'],
            'address'      => (string)$row['address'],
            'contact'      => $this->maskPhone($row['phone']),
            'views'        => (int)$row['views'],
            'likes'        => (int)$row['likes'],
            'isPaid'       => (int)$row['is_paid'] === 1,
            'auditStatus'  => (int)$row['audit_status'],
            'createdAt'    => $this->iso($row['createtime']),
            'tags'         => $tags,
            'publisher'    => $publisher,
            'commentCount' => (int)$row['comment_count'],
            'distance'     => (int)$row['distance'],
        ];
    }
}