<?php

namespace app\api\controller;

use think\Db;

/**
 * 首页 / 服务类目 / 服务项目 / 费用试算
 */
class Home extends Base
{
    protected $noNeedLogin = ['index', 'cats', 'services', 'detail'];

    /**
     * 首页聚合：类目 + 热门服务 + 我的角标
     */
    public function index()
    {
        $cats = Db::name('service_cat')
            ->field('id,name,icon')
            ->where('status', 'normal')
            ->order('weigh desc,id asc')
            ->select();

        $hot = Db::name('service')
            ->field('id,cat_id,name,price_type,base_price,max_price,unit,image,sales')
            ->where('status', 'normal')
            ->order('sales desc,id asc')
            ->limit(6)
            ->select();

        $data = [
            'cats'     => $cats,
            'hot'      => $this->formatServices($hot),
            'banners'  => $this->banners(),
            'assures'  => $this->configList('home_assure', '平台认证,先行赔付,极速上门,售后无忧'),
            'tutorial' => $this->tutorial(),
            'badge'    => ['coupon' => 0, 'unread' => 0],
        ];

        if ($this->auth->isLogin()) {
            $uid = $this->uid();
            $data['badge']['coupon'] = (int)Db::name('user_coupon')->where('user_id', $uid)->where('status', 'unused')->count();
            $data['badge']['unread'] = (int)Db::name('message')->where('receive_type', 'user')->where('receive_id', $uid)->where('is_read', 0)->count();
        }

        $this->success('', $data);
    }

    /**
     * 全部类目
     */
    public function cats()
    {
        $cats = Db::name('service_cat')
            ->field('id,name,icon')
            ->where('status', 'normal')
            ->order('weigh desc,id asc')
            ->select();
        $this->success('', ['list' => $cats]);
    }

    /**
     * 类目下的服务列表
     */
    public function services()
    {
        $catId = (int)$this->request->param('cat_id');
        $keyword = trim((string)$this->request->param('keyword'));
        if ($catId <= 0 && $keyword === '') {
            $this->error('请选择服务类目');
        }
        $query = Db::name('service')->where('status', 'normal');
        if ($catId > 0) {
            $query->where('cat_id', $catId);
        }
        if ($keyword !== '') {
            $query->where('name', 'like', '%' . $keyword . '%');
        }
        $list = $query->order('weigh desc,sales desc,id asc')->select();
        $this->success('', ['list' => $this->formatServices($list)]);
    }

    /**
     * 服务详情
     */
    public function detail()
    {
        $id = (int)$this->request->param('id');
        $service = Db::name('service')->where('id', $id)->where('status', 'normal')->find();
        if (!$service) {
            $this->error('服务不存在');
        }
        $cat = Db::name('service_cat')->where('id', $service['cat_id'])->find();
        $service['cat_name'] = $cat ? $cat['name'] : '';
        $this->success('', ['detail' => $this->formatService($service)]);
    }

    /**
     * 费用试算（基础价 + 楼层费 + 加急费 - 优惠）
     * 支持下单页实时切换：一口价 / 师傅报价 / 用户自主定价
     */
    public function calc()
    {
        $serviceId = (int)$this->request->param('service_id');
        $service = Db::name('service')->where('id', $serviceId)->where('status', 'normal')->find();
        if (!$service) {
            $this->error('服务不存在');
        }
        $result = $this->calcAmount($service, [
            'floor'        => (int)$this->request->param('floor', 1),
            'has_elevator' => (int)$this->request->param('has_elevator', 1),
            'urgent'       => (int)$this->request->param('urgent', 0),
        ], (int)$this->request->param('coupon_id', 0), $this->uid(),
            (string)$this->request->param('price_type', ''),
            (float)$this->request->param('user_price', 0));

        $this->success('', $result);
    }

    /**
     * 金额计算（下单与试算共用，保证前后端口径一致）
     *
     * @param array  $service   服务行
     * @param array  $params    floor / has_elevator / urgent
     * @param int    $couponId  用户优惠券 id
     * @param int    $uid       用户 id
     * @param string $priceType 计价方式：fixed 一口价 / quote 师傅报价 / custom 用户自主定价
     * @param float  $userPrice 用户自主定价金额（总价，含楼层/加急）
     */
    public static function calcAmount($service, $params, $couponId = 0, $uid = 0, $priceType = '', $userPrice = 0)
    {
        $allowTypes = ['fixed', 'quote', 'range', 'custom'];
        $type = in_array($priceType, $allowTypes, true) ? $priceType : $service['price_type'];

        $base = (float)$service['base_price'];
        $floorAmount = 0;
        $urgentAmount = 0;

        if ($type === 'custom') {
            // 用户自主定价：出价即订单总价，已包含楼层费/加急费，师傅按此价接单
            $base = max(0, round((float)$userPrice, 2));
            $total = $base;
        } else {
            $floor = max(0, (int)$params['floor']);
            $freeFloor = (int)$service['free_floor'];
            $floorFee = (float)$service['floor_fee'];

            if ((int)$params['has_elevator'] === 0 && $floor > $freeFloor) {
                $floorAmount = ($floor - $freeFloor) * $floorFee;
            }

            $urgentAmount = (int)$params['urgent'] === 1 ? round($base * 0.2, 2) : 0;
            $total = round($base + $floorAmount + $urgentAmount, 2);
        }

        $discount = 0;
        $couponInfo = null;
        if ($couponId > 0 && $uid > 0) {
            $uc = Db::name('user_coupon')->where('id', $couponId)->where('user_id', $uid)->where('status', 'unused')->find();
            if ($uc) {
                $coupon = Db::name('coupon')->where('id', $uc['coupon_id'])->where('status', 'normal')->find();
                $notExpired = $coupon && (int)$coupon['end_time'] === 0 ? true : ($coupon && $coupon['end_time'] > time());
                if ($notExpired && $total >= (float)$coupon['min_amount']) {
                    $discount = $coupon['type'] === 'cash'
                        ? (float)$coupon['amount']
                        : round($total * (1 - (float)$coupon['discount']), 2);
                    $discount = min($discount, $total);
                    $couponInfo = ['id' => (int)$uc['id'], 'name' => $coupon['name']];
                }
            }
        }

        return [
            'price_type'      => $type,
            'user_price'      => $type === 'custom' ? round($base, 2) : 0,
            'base_amount'     => round($base, 2),
            'floor_amount'    => round($floorAmount, 2),
            'urgent_amount'   => round($urgentAmount, 2),
            'total_amount'    => $total,
            'discount_amount' => round($discount, 2),
            'pay_amount'      => max(0, round($total - $discount, 2)),
            'coupon'          => $couponInfo,
            'free_floor'      => $type === 'custom' ? 0 : (int)$service['free_floor'],
            'floor_fee'       => $type === 'custom' ? 0 : round((float)$service['floor_fee'], 2),
        ];
    }

    /**
     * 首页运营位（后台 fa_banner 可管，缺省回落到内置文案）
     */
    protected function banners()
    {
        $rows = Db::name('banner')->where('status', 'normal')->order('weigh desc,id desc')->limit(5)->select();
        if (!$rows) {
            return [[
                'id' => 0, 'badge' => '家装季', 'title' => '双11 狂欢大促',
                'subtitle' => '下单立减 · 满额再返券', 'date_text' => '10.23 - 11.15',
                'image' => '', 'link' => '',
            ]];
        }
        $ret = [];
        foreach ($rows as $r) {
            $ret[] = [
                'id'        => (int)$r['id'],
                'badge'     => $r['badge'],
                'title'     => $r['title'],
                'subtitle'  => $r['subtitle'],
                'date_text' => $r['date_text'],
                'image'     => $r['image'],
                'link'      => $r['link'],
            ];
        }
        return $ret;
    }

    /**
     * 读取 fa_config 中的逗号分隔列表
     */
    protected function configList($name, $default = '')
    {
        $v = Db::name('config')->where('name', $name)->value('value');
        if (!$v) {
            $v = $default;
        }
        return array_values(array_filter(array_map('trim', explode(',', (string)$v))));
    }

    /**
     * 首页教程卡（fa_config: 标题|副标题）
     */
    protected function tutorial()
    {
        $v = Db::name('config')->where('name', 'home_tutorial')->value('value');
        if (!$v) {
            return ['title' => '下单找师傅教程', 'sub' => '3 分钟看懂，下单不踩坑'];
        }
        $parts = explode('|', (string)$v);
        return [
            'title' => trim($parts[0]),
            'sub'   => isset($parts[1]) ? trim($parts[1]) : '',
        ];
    }

    /**
     * 列表格式化
     */
    public function formatServices($list)
    {
        $ret = [];
        foreach ($list as $row) {
            $ret[] = $this->formatService($row);
        }
        return $ret;
    }

    /**
     * 单项格式化（价格文案统一由此输出）
     */
    public function formatService($row)
    {
        $type = $row['price_type'];
        $priceText = '¥' . (float)$row['base_price'] . '起';
        if ($type === 'range') {
            $priceText = '¥' . (float)$row['base_price'] . '-' . (float)$row['max_price'] . '/' . $row['unit'];
        } elseif ($type === 'quote') {
            $priceText = '¥' . (float)$row['base_price'] . '起 · 师傅报价';
        }
        return [
            'id'              => (int)$row['id'],
            'cat_id'          => (int)$row['cat_id'],
            'name'            => $row['name'],
            'cat_name'        => isset($row['cat_name']) ? $row['cat_name'] : '',
            'image'           => $row['image'],
            'price_type'      => $type,
            'price_type_text' => $type === 'fixed' ? '一口价' : ($type === 'quote' ? '师傅报价' : '按面积计价'),
            'base_price'      => (float)$row['base_price'],
            'max_price'       => (float)$row['max_price'],
            'unit'            => $row['unit'],
            'price_text'      => $priceText,
            'sales'           => (int)$row['sales'],
            'floor_fee'       => isset($row['floor_fee']) ? (float)$row['floor_fee'] : 0,
            'free_floor'      => isset($row['free_floor']) ? (int)$row['free_floor'] : 0,
            'need_model'      => isset($row['need_model']) ? (int)$row['need_model'] : 1,
            'description'     => isset($row['description']) ? $row['description'] : '',
        ];
    }
}