package main

// 诊断：复现 FeaturedIDs("images", 30) 的 SQL，验证热门品牌排名数据是否合理。

import (
	"fmt"

	"gorm.io/driver/postgres"
	"gorm.io/gorm"
)

const dsn = "postgres://fashion:fashion_dev_2026@127.0.0.1:5432/fashion?sslmode=disable"

func main() {
	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
	if err != nil {
		panic(err)
	}

	// 1) 复现 FeaturedIDs：按图片总数 DESC 取前 30
	type Row struct {
		BrandID uint32 `gorm:"column:brand_id"`
		Images  int64  `gorm:"column:images"`
		Shows   int64  `gorm:"column:shows"`
	}
	var rows []Row
	db.Raw(`
		SELECT brand_id, COALESCE(SUM(image_count),0) AS images, COUNT(*) AS shows
		FROM brand_runways
		WHERE is_deleted = 0
		GROUP BY brand_id
		ORDER BY images DESC
		LIMIT 30
	`).Scan(&rows)

	fmt.Println("== FeaturedIDs(images, 30) 原始排名 ==")
	for i, r := range rows {
		var name string
		db.Raw(`SELECT name_en FROM brands WHERE id = ?`, r.BrandID).Scan(&name)
		fmt.Printf("%2d. brand_id=%-6d images=%-6d shows=%-4d %s\n", i+1, r.BrandID, r.Images, r.Shows, name)
	}

	// 2) image_count 分布：有多少品牌有图、多少归零
	var zeroBrands, hasImgBrands int64
	var totalRows, zeroRows int64
	db.Raw(`SELECT COUNT(*) FROM (SELECT brand_id, SUM(image_count) s FROM brand_runways WHERE is_deleted=0 GROUP BY brand_id) t WHERE s = 0`).Scan(&zeroBrands)
	db.Raw(`SELECT COUNT(*) FROM (SELECT brand_id, SUM(image_count) s FROM brand_runways WHERE is_deleted=0 GROUP BY brand_id) t WHERE s > 0`).Scan(&hasImgBrands)
	db.Raw(`SELECT COUNT(*) FROM brand_runways WHERE is_deleted=0`).Scan(&totalRows)
	db.Raw(`SELECT COUNT(*) FROM brand_runways WHERE is_deleted=0 AND image_count=0`).Scan(&zeroRows)
	fmt.Printf("\n== image_count 分布 ==\n有图品牌=%d 零图品牌=%d | 走秀总行=%d 其中 image_count=0 的行=%d\n", hasImgBrands, zeroBrands, totalRows, zeroRows)

	// 3) 对比口径：按走秀数(shows) DESC 前 10
	var byShows []Row
	db.Raw(`
		SELECT brand_id, COALESCE(SUM(image_count),0) AS images, COUNT(*) AS shows
		FROM brand_runways
		WHERE is_deleted = 0
		GROUP BY brand_id
		ORDER BY shows DESC
		LIMIT 10
	`).Scan(&byShows)
	fmt.Println("\n== 若按 shows DESC 前 10 ==")
	for i, r := range byShows {
		var name string
		db.Raw(`SELECT name_en FROM brands WHERE id = ?`, r.BrandID).Scan(&name)
		fmt.Printf("%2d. brand_id=%-6d images=%-6d shows=%-4d %s\n", i+1, r.BrandID, r.Images, r.Shows, name)
	}
}