package service

import (
	"os"
	"strconv"
	"testing"

	"github.com/topfans/backend/pkg/database"
	"github.com/topfans/backend/pkg/models"
	"github.com/topfans/backend/services/assetService/repository"
	"gorm.io/gorm"
)

// TestCalculateBuff 纯函数,无需 DB,保留原有行为。
func TestCalculateBuff(t *testing.T) {
	tests := []struct {
		likeCount int
		expected  int
	}{
		{0, 0},
		{4, 0},
		{5, 10},
		{9, 10},
		{10, 20},
		{29, 20},
		{30, 30},
		{100, 30},
	}

	for _, tt := range tests {
		result := CalculateBuff(tt.likeCount)
		if result != tt.expected {
			t.Errorf("CalculateBuff(%d) = %d, want %d", tt.likeCount, result, tt.expected)
		}
	}
}

// assetLevelTestDB 资产级幂等测试专用 DB 连接。
//
// 自包含:
//   - 通过 TEST_DB_HOST/PORT/USER/PASSWORD/NAME 覆盖,默认 localhost:15432 / postgres / 123456 / top-fans。
//   - 连不上 t.Skip(不污染全局 TestMain,避免影响其它测试)。
//   - AutoMigrate asset_level_records / asset_exhibition_hours_log / season / asset_level(幂等所需)。
func assetLevelTestDB(t *testing.T) *gorm.DB {
	t.Helper()
	if os.Getenv("SKIP_DB_TESTS") != "" {
		t.Skip("SKIP_DB_TESTS set")
	}

	host := getEnvOrDefault("TEST_DB_HOST", "localhost")
	portStr := getEnvOrDefault("TEST_DB_PORT", "15432")
	port, _ := strconv.Atoi(portStr)
	if port == 0 {
		port = 15432
	}
	user := getEnvOrDefault("TEST_DB_USER", "postgres")
	password := getEnvOrDefault("TEST_DB_PASSWORD", "123456")
	dbname := getEnvOrDefault("TEST_DB_NAME", "top-fans")

	if err := database.Init(database.Config{
		Host:     host,
		Port:     port,
		User:     user,
		Password: password,
		DBName:   dbname,
		SSLMode:  "disable",
		TimeZone: "Asia/Shanghai",
	}); err != nil {
		t.Skipf("Skipping: failed to connect to test database %s:%d/%s as %s: %v",
			host, port, dbname, user, err)
	}

	db := database.GetDB()

	// AutoMigrate 幂等所需最小表集(若已存在则跳过)。
	if err := db.AutoMigrate(
		&models.Season{},
		&models.AssetLevel{},
		&models.AssetLevelRecord{},
		&models.AssetLevelChangeLog{},
		&models.AssetExhibitionHoursLog{},
	); err != nil {
		t.Logf("Warning: AutoMigrate asset_level tables (may already exist): %v", err)
	}

	// 确保至少存在 N 等级(供 CheckUpgrade 不会因为没有 level 而 panic)。
	var n int64
	db.Model(&models.AssetLevel{}).Where("level = ?", models.LevelN).Count(&n)
	if n == 0 {
		db.Create(&models.AssetLevel{
			Level:        models.LevelN,
			LevelOrder:   1,
			RequireHours: 99999999,
			RequireLikes: 99999999,
		})
	}

	return db
}

func getEnvOrDefault(key, def string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return def
}

// TestAddExhibitionHours_AssetIdempotent 资产级幂等测试。
//
// 验收:
//   - 同一 sourceID 二次调用,不重复累加 SeasonExhibitionHours / LifetimeExhibitionHours。
//   - 二次调用返回 upgraded=false。
//   - asset_exhibition_hours_log 中恰好 1 条记录。
//
// 数据隔离:
//   - 用 sentinel assetID + sourceID,只删自己 sentinel 行,不调用任何全局 cleanup helper。
func TestAddExhibitionHours_AssetIdempotent(t *testing.T) {
	db := assetLevelTestDB(t)

	levelRepo := repository.NewAssetLevelRepository(db)
	seasonRepo := repository.NewSeasonRepository(db)
	decayRepo := repository.NewSeasonDecayConfigRepository(db)
	svc := NewAssetLevelService(levelRepo, seasonRepo, decayRepo)

	assetID := int64(99900091)
	srcID := "test_asset_exh_log_91_001"

	// 先清 sentinel 行(包含上一次失败或并发残留),defer 再清一次确保退出干净。
	db.Exec("DELETE FROM asset_exhibition_hours_log WHERE source_id = ?", srcID)
	db.Exec("DELETE FROM asset_level_records WHERE asset_id = ?", assetID)
	defer func() {
		db.Exec("DELETE FROM asset_exhibition_hours_log WHERE source_id = ?", srcID)
		db.Exec("DELETE FROM asset_level_records WHERE asset_id = ?", assetID)
	}()

	// 1) 首次:应该累加,新等级(sourceID 不同每次应该都能跑完 add 路径)。
	lvl1, up1, err := svc.AddExhibitionHours(assetID, 5, srcID)
	if err != nil {
		t.Fatalf("first AddExhibitionHours err: %v", err)
	}
	_ = lvl1
	_ = up1

	// 2) 二次:同 sourceID,应该跳过累加、不触发升级。
	lvl2, up2, err := svc.AddExhibitionHours(assetID, 5, srcID)
	if err != nil {
		t.Fatalf("second AddExhibitionHours err: %v", err)
	}
	if up2 {
		t.Errorf("want upgraded=false on duplicate source_id, got true (level=%s)", lvl2)
	}
	if lvl2 == "" {
		t.Errorf("want non-empty level on duplicate, got empty string")
	}

	// 3) 校验累加表:SeasonExhibitionHours 应仅为 5(一次生效)。
	var rec models.AssetLevelRecord
	if err := db.Where("asset_id = ?", assetID).First(&rec).Error; err != nil {
		t.Fatalf("read asset level record: %v", err)
	}
	if rec.SeasonExhibitionHours != 5 {
		t.Errorf("want SeasonExhibitionHours=5 (one apply), got %d", rec.SeasonExhibitionHours)
	}
	if rec.LifetimeExhibitionHours != 5 {
		t.Errorf("want LifetimeExhibitionHours=5 (one apply), got %d", rec.LifetimeExhibitionHours)
	}

	// 4) 校验幂等 log 表:恰好 1 条。
	var logCount int64
	if err := db.Model(&models.AssetExhibitionHoursLog{}).
		Where("source_id = ?", srcID).Count(&logCount).Error; err != nil {
		t.Fatalf("count asset exhibition log: %v", err)
	}
	if logCount != 1 {
		t.Errorf("want exactly 1 asset_exhibition_hours_log row, got %d", logCount)
	}
}