<?php
/**
 * 🔥 热门排行接口
 * 
 * @file      api_hot.php
 * @author    AI Assistant
 * @date      2026-04-12
 * @version   1.1.0
 * @desc      获取热门菜谱、热门食材排行
 * @lastUpdate 2026-04-12 添加评分显示功能，更新字段名 rate_nums/rate_score
 * 
 * 访问地址: /api/api_hot.php
 * 
 * 参数说明:
 * - type: recipe(菜谱) / ingredient(食材)，默认recipe
 * - sort: view(浏览量) / like(点赞数) / rate(评分)，默认view
 * - limit: 返回数量，默认20，最大100
 * - cate_id: 分类ID筛选（可选）
 */

$startTime = microtime(true);

require '../zb_system/function/c_system_base.php';
$zbp->Load();

require_once 'response.php';

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST, OPTIONS');

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
    http_response_code(200);
    exit;
}

$type = strtolower(trim($_GET['type'] ?? 'recipe'));
$sort = strtolower(trim($_GET['sort'] ?? 'view'));
$limit = min((int) ($_GET['limit'] ?? 20), 100);
$limit = max(1, $limit);
$cateId = isset($_GET['cate_id']) ? (int) $_GET['cate_id'] : 0;

$result = array();

switch ($type) {
    case 'recipe':
        $result = get_recipe_hot($sort, $limit, $cateId);
        break;
    case 'ingredient':
        $result = get_ingredient_hot($sort, $limit);
        break;
    case 'all':
        $result = array(
            'code' => 200,
            'message' => 'success',
            'data' => array(
                'recipe_view' => get_recipe_list('view', $limit, $cateId),
                'recipe_like' => get_recipe_list('like', $limit, $cateId),
                'ingredient_view' => get_ingredient_list('view', $limit)
            )
        );
        break;
    default:
        $result = array(
            'code' => 400,
            'message' => '无效的type参数，可选: recipe/ingredient/all',
            'data' => null
        );
}

$result['_query_time'] = round((microtime(true) - $startTime) * 1000, 2) . 'ms';

$format = ApiResponse::getFormat();
ApiResponse::output($result, $format);
exit;

/**
 * 获取热门菜谱
 */
function get_recipe_hot($sort, $limit, $cateId) {
    global $zbp;
    
    $tablePost = $zbp->db->dbpre . 'post';
    $tablePostStat = $zbp->db->dbpre . 'post_stat';
    $tableCategory = $zbp->db->dbpre . 'category';
    
    $whereClauses = array("p.log_Type = 0", "p.log_Status = 0");
    
    if ($cateId > 0) {
        $whereClauses[] = "p.log_CateID = $cateId";
    }
    
    $whereSql = implode(' AND ', $whereClauses);
    
    switch ($sort) {
        case 'like':
            $orderBy = 'COALESCE(s.like_nums, 0) DESC';
            break;
        case 'rate':
            $orderBy = 'COALESCE(s.rate_score, 0) DESC';
            break;
        default:
            $orderBy = 'p.log_ViewNums DESC';
    }
    
    $sql = "SELECT 
                p.log_ID as id, 
                p.log_Title as title, 
                p.log_Intro as intro,
                p.log_CateID as category_id,
                c.cate_Name as category_name,
                p.log_ViewNums as view_count,
                COALESCE(s.like_nums, 0) as like_count,
                COALESCE(s.rate_nums, 0) as rate_count,
                COALESCE(s.rate_score, 0) as rate_score
            FROM $tablePost p
            LEFT JOIN $tablePostStat s ON p.log_ID = s.log_id
            LEFT JOIN $tableCategory c ON p.log_CateID = c.cate_ID
            WHERE $whereSql
            ORDER BY $orderBy
            LIMIT $limit";
    
    $rows = $zbp->db->Query($sql);
    
    $list = array();
    foreach ($rows as $row) {
        $list[] = array(
            'id' => (int) $row['id'],
            'title' => $row['title'],
            'intro' => mb_substr(strip_tags($row['intro']), 0, 100),
            'category_id' => (int) $row['category_id'],
            'category_name' => $row['category_name'],
            'view_count' => (int) $row['view_count'],
            'like_count' => (int) $row['like_count'],
            'rate_count' => (int) $row['rate_count'],
            'rate_score' => (float) $row['rate_score'],
            'rating' => ApiResponse::getRatingSummary(
                (float) $row['rate_score'],
                (int) $row['rate_count']
            ),
            'url' => "?act=detail&id=" . $row['id']
        );
    }
    
    return array(
        'code' => 200,
        'message' => 'success',
        'data' => array(
            'type' => 'recipe',
            'sort' => $sort,
            'category_id' => $cateId,
            'list' => $list,
            'total' => count($list)
        )
    );
}

/**
 * 获取热门食材
 */
function get_ingredient_hot($sort, $limit) {
    global $zbp;
    
    $tableIngredient = $zbp->db->dbpre . 'ingredient_detail';
    $tableIngredientStat = $zbp->db->dbpre . 'ingredient_stat';
    $tableCategory = $zbp->db->dbpre . 'category';
    
    switch ($sort) {
        case 'like':
            $orderBy = 'COALESCE(s.like_nums, 0) DESC';
            break;
        case 'rate':
            $orderBy = 'COALESCE(s.rate_score, 0) DESC';
            break;
        default:
            $orderBy = 'i.view_count DESC';
    }
    
    $sql = "SELECT 
                i.ingredient_id as id, 
                i.name, 
                i.cate_ID as category_id,
                c.cate_Name as category_name,
                i.view_count,
                COALESCE(s.like_nums, 0) as like_count,
                COALESCE(s.rate_nums, 0) as rate_count,
                COALESCE(s.rate_score, 0) as rate_score
            FROM $tableIngredient i
            LEFT JOIN $tableIngredientStat s ON i.ingredient_id = s.ingredient_id
            LEFT JOIN $tableCategory c ON i.cate_ID = c.cate_ID
            ORDER BY $orderBy
            LIMIT $limit";
    
    $rows = $zbp->db->Query($sql);
    
    $list = array();
    foreach ($rows as $row) {
        $list[] = array(
            'id' => (int) $row['id'],
            'name' => $row['name'],
            'category_id' => (int) $row['category_id'],
            'category_name' => $row['category_name'],
            'view_count' => (int) $row['view_count'],
            'like_count' => (int) $row['like_count'],
            'rate_count' => (int) $row['rate_count'],
            'rate_score' => (float) $row['rate_score'],
            'rating' => ApiResponse::getRatingSummary(
                (float) $row['rate_score'],
                (int) $row['rate_count']
            ),
            'url' => "?act=ingredient_detail&id=" . $row['id']
        );
    }
    
    return array(
        'code' => 200,
        'message' => 'success',
        'data' => array(
            'type' => 'ingredient',
            'sort' => $sort,
            'list' => $list,
            'total' => count($list)
        )
    );
}

/**
 * 获取菜谱列表（用于all类型）
 */
function get_recipe_list($sort, $limit, $cateId) {
    $result = get_recipe_hot($sort, $limit, $cateId);
    return $result['data']['list'];
}

/**
 * 获取食材列表（用于all类型）
 */
function get_ingredient_list($sort, $limit) {
    $result = get_ingredient_hot($sort, $limit);
    return $result['data']['list'];
}