package promo

import (
	"context"
	"strings"
	"testing"

	"gorm.io/driver/mysql"
	"gorm.io/gorm"
)

func TestQueryEligibleRulesFiltersByQuantity(t *testing.T) {
	db, err := gorm.Open(mysql.New(mysql.Config{
		DSN:                       "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local",
		SkipInitializeWithVersion: true,
	}), &gorm.Config{DryRun: true, DisableAutomaticPing: true})
	if err != nil {
		t.Fatalf("open dry-run db: %v", err)
	}

	model := &defaultPromoModel{db: db}
	var list []*RuleWithPrice
	tx := model.eligibleRulesQuery(context.Background(), 11, 3).Find(&list)
	stmt := tx.Statement
	sql := stmt.SQL.String()
	if !strings.Contains(sql, "JOIN subscribe_promo AS sp ON sp.promo_rule_id = pr.id AND sp.quantity = ?") {
		t.Fatalf("SQL missing quantity join condition: %s", sql)
	}

	if len(stmt.Vars) < 2 {
		t.Fatalf("SQL vars length = %d, want at least 2; vars=%v", len(stmt.Vars), stmt.Vars)
	}
	if got, want := stmt.Vars[0], int64(3); got != want {
		t.Fatalf("first SQL var = %v, want quantity %d; vars=%v", got, want, stmt.Vars)
	}
	if got, want := stmt.Vars[1], int64(11); got != want {
		t.Fatalf("second SQL var = %v, want subscribe_id %d; vars=%v", got, want, stmt.Vars)
	}
}