<?php
/**
 * VR票务插件 - C端商品API控制器
 * 
 * 路由: /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=xxx
 *
 * @package vr_ticket\api
 */

namespace app\plugins\vr_ticket\api;

use app\plugins\vr_ticket\service\SeatMapService;
use app\plugins\vr_ticket\service\QueryManager;
use app\service\GoodsService;

/**
 * C端商品 API
 */
class Goods
{
    private static function success($data = [], string $msg = 'success')
    {
        return [
            'code' => 0,
            'msg'  => $msg,
            'data' => $data,
        ];
    }

    private static function error(string $msg = '请求失败', int $code = -1)
    {
        return [
            'code' => $code,
            'msg'  => $msg,
            'data' => [],
        ];
    }

    /**
     * 获取热门推荐商品
     * 
     * GET /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=recommend
     */
    public function recommend()
    {
        try {
            // 调用 ShopXO 商品服务获取热门商品
            // VR票务插件的 category_id 需要在商品管理中设置
            $params = [
                'is_new'          => 0,
                'is_recommend'    => 1,
                'is_error'        => 0,
                'is_delete_time'  => 0,
                'start'           => 0,
                'num'            => 10,
                'order_by'       => 'sales',
                'sort'           => 'desc',
            ];
            
            $result = GoodsService::GoodsList($params);
            $list = self::formatGoodsList($result);
            
            return self::success([
                'list' => $list,
                'count' => count($list),
            ]);
        } catch (\Exception $e) {
            return self::error('获取推荐失败: ' . $e->getMessage());
        }
    }

    /**
     * 获取商品列表
     * 
     * GET /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=lists
     * @param int city_id 城市ID筛选
     * @param int page 页码
     * @param int size 每页数量
     */
    public function lists()
    {
        try {
            $page = input('page', 1, 'intval');
            $size = input('size', 10, 'intval');
            $cityId = input('city_id', 0, 'intval');
            if (empty($cityId)) {
                $cityId = input('cityid', 0, 'intval');
            }
            
            $start = ($page - 1) * $size;
            
            $params = [
                'is_new'          => 0,
                'is_error'        => 0,
                'is_delete_time'  => 0,
                'start'          => $start,
                'num'            => $size,
                'order_by'       => 'add_time',
                'sort'           => 'desc',
            ];
            
            // 城市筛选（如果有设置produce_region）
            if (!empty($cityId)) {
                $params['produce_region'] = $cityId;
            }
            
            $result = GoodsService::GoodsList($params);
            $list = self::formatGoodsList($result);
            
            return self::success([
                'list'   => $list,
                'count'  => count($list),
                'page'   => $page,
                'size'   => $size,
            ]);
        } catch (\Exception $e) {
            return self::error('获取列表失败: ' . $e->getMessage());
        }
    }

    /**
     * 获取周边商品
     * 
     * GET /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=merchandise
     */
    public function merchandise()
    {
        try {
            $page = input('page', 1, 'intval');
            $size = input('size', 20, 'intval');
            
            $start = ($page - 1) * $size;
            
            // 获取VR票务相关的周边商品（非票务类型）
            $params = [
                'is_new'          => 0,
                'is_error'        => 0,
                'is_delete_time'  => 0,
                'start'          => $start,
                'num'            => $size,
                'order_by'       => 'sales',
                'sort'           => 'desc',
                // 可以根据实际情况添加商品分类筛选
            ];
            
            $result = GoodsService::GoodsList($params);
            $list = self::formatGoodsList($result);
            
            return self::success([
                'list'   => $list,
                'count'  => count($list),
            ]);
        } catch (\Exception $e) {
            return self::error('获取周边商品失败: ' . $e->getMessage());
        }
    }

    /**
     * 获取商品详情
     * 
     * GET /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=detail&id=X
     */
    public function detail()
    {
        $goodsId = input('id', 0, 'intval');
        if ($goodsId <= 0) {
            return self::error('参数错误：商品ID无效');
        }
        
        try {
            $goods = GoodsService::GoodsDetail($goodsId);
            
            if (empty($goods)) {
                return self::error('商品不存在', -404);
            }
            
            return self::success([
                'goods' => self::formatGoodsDetail($goods),
            ]);
        } catch (\Exception $e) {
            return self::error('获取详情失败: ' . $e->getMessage());
        }
    }

    /**
     * 搜索商品
     *
     * GET /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=search&keyword=X
     */
    public function search()
    {
        $keyword = input('keyword', '', 'trim');
        $page = input('page', 1, 'intval');
        $size = input('size', 10, 'intval');
        
        if (empty($keyword)) {
            return self::error('请输入搜索关键词');
        }
        
        try {
            $start = ($page - 1) * $size;
            
            $params = [
                'is_new'          => 0,
                'is_error'        => 0,
                'is_delete_time'  => 0,
                'start'          => $start,
                'num'            => $size,
                'title_like'     => $keyword,
                'order_by'       => 'sales',
                'sort'           => 'desc',
            ];
            
            $result = GoodsService::GoodsList($params);
            $list = self::formatGoodsList($result);
            
            return self::success([
                'list'    => $list,
                'count'   => count($list),
                'keyword' => $keyword,
            ]);
        } catch (\Exception $e) {
            return self::error('搜索失败: ' . $e->getMessage());
        }
    }

    /**
     * 获取座位图（含实时库存）
     *
     * GET /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=seatmap&goods_id=118
     *
     * @return array { code, msg, data: { seatSpecMap, goods_spec_data } }
     */
    public function seatmap()
    {
        $goodsId = input('goods_id', 0, 'intval');
        if ($goodsId <= 0) {
            return self::error('参数错误：goods_id 无效');
        }

        try {
            $data = SeatMapService::GetSeatMap($goodsId);
            return self::success($data);
        } catch (\Exception $e) {
            return self::error('获取座位图失败: ' . $e->getMessage());
        }
    }

    /**
     * 获取层级树 API（Tree API）
     *
     * 返回：tree + seat_templates_flat + flat_inventory
     * 支持参数化 group_by 指定层级顺序
     *
     * GET /api.php?s=plugins/index&pluginsname=vr_ticket&pluginscontrol=goods&pluginsaction=tree&goods_id=118&group_by=venue,session,room,section
     *
     * @return array { code, msg, data: { goods_id, group_by, tree, seat_templates_flat, flat_inventory, meta } }
     */
    public function tree()
    {
        $goodsId = input('goods_id', 0, 'intval');
        $groupByStr = input('group_by', 'venue,session,room,section', 'trim');

        if ($goodsId <= 0) {
            return self::error('goods_id 无效');
        }

        // 解析 group_by 参数
        $groupBy = array_filter(array_map('trim', explode(',', $groupByStr)));
        if (empty($groupBy)) {
            return self::error('group_by 参数无效');
        }

        // 允许的维度
        $allowedDims = ['venue', 'session', 'room', 'section'];
        foreach ($groupBy as $dim) {
            if (!in_array($dim, $allowedDims)) {
                return self::error("不支持的维度: {$dim}，允许: " . implode(',', $allowedDims));
            }
        }

        try {
            // 缓存检查（注意：旧缓存不含 goods 字段，需要补充）
            $cacheKey = 'vr_tree_v4_' . $goodsId . '_' . md5(implode(',', $groupBy));
            $cached = \think\facade\Cache::get($cacheKey);
            if ($cached !== null) {
                $cached['meta']['cache_hit'] = true;
                // 旧缓存不含 goods，补充构建
                if (!isset($cached['goods'])) {
                    $cached['goods'] = self::buildGoodsField($goodsId);
                }
                return self::success($cached);
            }

            // 读取数据源
            $seatMapData = SeatMapService::GetSeatMap($goodsId);
            $seatSpecMap = $seatMapData['seatSpecMap'] ?? [];

            if (empty($seatSpecMap)) {
                return self::success([
                    'goods_id' => $goodsId,
                    'group_by' => $groupBy,
                    'tree' => [],
                    'goods' => self::buildGoodsField($goodsId),
                    'seat_templates' => new \stdClass(),
                    'meta' => [
                        'seat_count' => 0,
                        'template_count' => 0,
                        'cache_hit' => false,
                        'computed_at' => time(),
                    ],
                ]);
            }

            // 调用 QueryManager 构建数据
            $treeData = QueryManager::buildTree($goodsId, $groupBy, $seatSpecMap);
            $templateList = QueryManager::buildTemplatePool($goodsId, $treeData['template_keys'] ?? []);
            $seatTemplates = QueryManager::transformTemplatePool($templateList);

            // 提取场次元数据（从 SKU extends JSON，供前端场次选择控件使用：禁用判断 + 倒计时）
            $sessionMeta = self::extractSessionMeta($goodsId);

            // 组装响应
            $result = [
                'goods_id' => $goodsId,
                'group_by' => $groupBy,
                'tree' => $treeData['tree'],
                'goods' => self::buildGoodsField($goodsId),
                'seat_templates' => $seatTemplates,
                'session_meta' => $sessionMeta,
                'peer_goods' => QueryManager::getPeerGoods($goodsId),
                'meta' => [
                    'seat_count' => $treeData['seat_count'] ?? 0,
                    'template_count' => count($seatTemplates),
                    'cache_hit' => false,
                    'computed_at' => time(),
                ],
            ];

            // 写入缓存（TTL = 60s）
            \think\facade\Cache::set($cacheKey, $result, 60);

            return self::success($result);
        } catch (\Exception $e) {
            return self::error('获取层级树失败: ' . $e->getMessage());
        }
    }

    /**
     * 构建 goods 字段（包含手机详情 content_app）
     *
     * 复用 GoodsService::GoodsList，传入 is_content_app=1 以包含手机端详情数据。
     * 这使得 uniapp 可以仅调用 tree API 一次就获取完整数据，无需二次请求 goods/detail。
     *
     * @param int $goodsId
     * @return array
     */
    private static function buildGoodsField(int $goodsId): array
    {
        $isUseMobileDetail = intval(\MyC('common_app_is_use_mobile_detail', 0, true));

        $params = [
            'where' => [
                ['id', '=', $goodsId],
                ['is_delete_time', '=', 0],
            ],
            'is_content_app' => $isUseMobileDetail,
            'is_spec' => 1,
            'is_params' => 1,
            'is_favor' => 1,
            'm' => 0,
            'n' => 1,
        ];

        $ret = GoodsService::GoodsList($params);
        $goods = $ret['data'][0] ?? null;

        if (empty($goods)) {
            return [];
        }

        // 手机端详情模式下移除 PC 富文本，减少响应体积
        if ($isUseMobileDetail == 1) {
            unset($goods['content_web']);
        }

        return $goods;
    }

    /**
     * 格式化商品列表数据
     */
    private static function formatGoodsList($result)
    {
        $list = [];
        
        if (!empty($result)) {
            foreach ($result as $goods) {
                $list[] = [
                    'id'          => $goods['id'],
                    'title'       => $goods['title'],
                    'image'       => $goods['image'],
                    'price'       => $goods['price'],
                    'original_price' => $goods['original_price'] ?? $goods['price'],
                    'sales'       => $goods['sales'] ?? 0,
                    'stock'       => $goods['stock'] ?? 0,
                    'venue'       => isset($goods['produce_venue']) ? $goods['produce_venue'] : '',
                    'date'        => isset($goods['batch_number_expire']) && $goods['batch_number_expire'] > 0 ? date('Y-m-d', $goods['batch_number_expire']) : '',
                    'add_time'   => $goods['add_time'] ?? '',
                ];
            }
        }
        
        return $list;
    }

    /**
     * 格式化商品详情数据
     */
    private static function formatGoodsDetail($goods)
    {
        return [
            'id'               => $goods['id'],
            'title'            => $goods['title'],
            'image'            => $goods['image'],
            'images'           => !empty($goods['images']) ? explode(',', $goods['images']) : [$goods['image']],
            'price'            => $goods['price'],
            'original_price'   => $goods['original_price'] ?? $goods['price'],
            'sales'            => $goods['sales'] ?? 0,
            'stock'            => $goods['stock'] ?? 0,
            'content'          => htmlspecialchars_decode($goods['content'] ?? ''),
            'spec_type'        => $goods['spec_type'] ?? 0,
            'spec_value_id'    => $goods['spec_value_id'] ?? '',
            // 票务相关字段
            'venue'            => $goods['produce_venue'] ?? '',
            'date'             => isset($goods['batch_number_expire']) && $goods['batch_number_expire'] > 0 ? date('Y-m-d', $goods['batch_number_expire']) : '',
            'time'             => $goods['produce_time'] ?? '',
            'region'           => $goods['produce_region'] ?? '',
            'add_time'         => $goods['add_time'] ?? '',
        ];
    }

    /**
     * 从 SKU 的 extends JSON 中提取场次元数据（去重）
     *
     * 供前端场次选择控件使用：
     * - 判断场次是否已过期（disabled）
     * - 显示停售倒计时
     *
     * @param int $goodsId
     * @return array [['session' => '19:30-21:30', 'start' => '19:30', 'end' => '21:30', 'session_date' => '2026-05-18', 'session_datetime' => '2026-05-18 19:30:00', 'batch_expire_ts' => 1747567200], ...]
     */
    private static function extractSessionMeta(int $goodsId): array
    {
        $specs = \think\facade\Db::name('GoodsSpecBase')
            ->where('goods_id', $goodsId)
            ->select()
            ->toArray();

        if (empty($specs)) {
            return [];
        }

        $seen = [];
        $result = [];

        foreach ($specs as $spec) {
            $extends = json_decode($spec['extends'] ?? '{}', true);
            $session = $extends['session_start'] ?? '';
            $sessionEnd = $extends['session_end'] ?? '';

            if (empty($session)) {
                continue;
            }

            $sessionStr = "{$session}-{$sessionEnd}";

            // 去重：同一场次只保留一条
            if (isset($seen[$sessionStr])) {
                continue;
            }
            $seen[$sessionStr] = true;

            $result[] = [
                'session'          => $sessionStr,
                'start'            => $extends['session_start'] ?? '',
                'end'              => $extends['session_end'] ?? '',
                'session_date'     => $extends['session_date'] ?? '',
                'session_datetime' => $extends['session_datetime'] ?? '',
                'batch_expire_ts'  => intval($extends['batch_expire_ts'] ?? 0),
            ];
        }

        // 按场次时间排序
        usort($result, function ($a, $b) {
            return strcmp($a['session'], $b['session']);
        });

        return $result;
    }
}