package testutil

import (
	"context"
	"fmt"
	"math/rand"
	"sync/atomic"
	"testing"
	"time"

	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/pkg/auth"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	"github.com/redis/go-redis/v9"
	"github.com/stretchr/testify/require"
	"golang.org/x/crypto/bcrypt"
	"gorm.io/gorm"
)

// phoneCounter 用于生成唯一的手机号
var phoneCounter uint64

func init() {
	// 使用当前时间作为随机种子
	rand.Seed(time.Now().UnixNano())
	// 初始化计数器为一个随机值，避免不同测试运行之间的冲突
	phoneCounter = uint64(rand.Intn(10000))
}

// GenerateUniquePhone 生成唯一的测试手机号（导出供测试使用）
func GenerateUniquePhone() string {
	counter := atomic.AddUint64(&phoneCounter, 1)
	timestamp := time.Now().UnixNano() % 10000
	return fmt.Sprintf("139%04d%04d", timestamp, counter%10000)
}

// CreateTestAccount 创建测试账号
// userType: 1=超级管理员, 2=平台用户, 3=代理账号, 4=企业账号
func CreateTestAccount(t *testing.T, db *gorm.DB, username, password string, userType int, shopID, enterpriseID *uint) *model.Account {
	t.Helper()

	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
	require.NoError(t, err)

	phone := GenerateUniquePhone()

	account := &model.Account{
		BaseModel: model.BaseModel{
			Creator: 1,
			Updater: 1,
		},
		Username:     username,
		Phone:        phone,
		Password:     string(hashedPassword),
		UserType:     userType,
		ShopID:       shopID,
		EnterpriseID: enterpriseID,
		Status:       1,
	}

	err = db.Create(account).Error
	require.NoError(t, err)

	return account
}

// GenerateTestToken 为测试账号生成 token
func GenerateTestToken(t *testing.T, rdb *redis.Client, account *model.Account, device string) (accessToken, refreshToken string) {
	t.Helper()

	ctx := context.Background()

	var shopID, enterpriseID uint
	if account.ShopID != nil {
		shopID = *account.ShopID
	}
	if account.EnterpriseID != nil {
		enterpriseID = *account.EnterpriseID
	}

	tokenInfo := &auth.TokenInfo{
		UserID:       account.ID,
		UserType:     account.UserType,
		ShopID:       shopID,
		EnterpriseID: enterpriseID,
		Username:     account.Username,
		Device:       device,
		IP:           "127.0.0.1",
	}

	tokenManager := auth.NewTokenManager(rdb, 24*time.Hour, 7*24*time.Hour)
	accessToken, refreshToken, err := tokenManager.GenerateTokenPair(ctx, tokenInfo)
	require.NoError(t, err)

	return accessToken, refreshToken
}

// usernameCounter 用于生成唯一的用户名
var usernameCounter uint64

func init() {
	usernameCounter = uint64(rand.Intn(100000))
}

// GenerateUniqueUsername 生成唯一的测试用户名（导出供测试使用）
func GenerateUniqueUsername(prefix string) string {
	counter := atomic.AddUint64(&usernameCounter, 1)
	return fmt.Sprintf("%s_%d", prefix, counter)
}

// CreateSuperAdmin 创建或获取超级管理员测试账号
func CreateSuperAdmin(t *testing.T, db *gorm.DB) *model.Account {
	t.Helper()

	var existing model.Account
	err := db.Where("user_type = ?", constants.UserTypeSuperAdmin).First(&existing).Error
	if err == nil {
		return &existing
	}

	return CreateTestAccount(t, db, GenerateUniqueUsername("superadmin"), "password123", constants.UserTypeSuperAdmin, nil, nil)
}

// CreatePlatformUser 创建平台用户测试账号
func CreatePlatformUser(t *testing.T, db *gorm.DB) *model.Account {
	t.Helper()
	return CreateTestAccount(t, db, GenerateUniqueUsername("platformuser"), "password123", constants.UserTypePlatform, nil, nil)
}

// CreateAgentUser 创建代理账号测试账号
func CreateAgentUser(t *testing.T, db *gorm.DB, shopID uint) *model.Account {
	t.Helper()
	return CreateTestAccount(t, db, GenerateUniqueUsername("agentuser"), "password123", constants.UserTypeAgent, &shopID, nil)
}

// CreateEnterpriseUser 创建企业账号测试账号
func CreateEnterpriseUser(t *testing.T, db *gorm.DB, enterpriseID uint) *model.Account {
	t.Helper()
	return CreateTestAccount(t, db, GenerateUniqueUsername("enterpriseuser"), "password123", constants.UserTypeEnterprise, nil, &enterpriseID)
}

// shopCodeCounter 用于生成唯一的商户代码
var shopCodeCounter uint64

// CreateTestShop 创建测试商户
func CreateTestShop(t *testing.T, db *gorm.DB, name, code string, level int, parentID *uint) *model.Shop {
	t.Helper()

	counter := atomic.AddUint64(&shopCodeCounter, 1)
	uniqueCode := fmt.Sprintf("%s_%d_%d", code, time.Now().UnixNano()%10000, counter)
	uniqueName := fmt.Sprintf("%s_%d", name, counter)

	shop := &model.Shop{
		BaseModel: model.BaseModel{
			Creator: 1,
			Updater: 1,
		},
		ShopName: uniqueName,
		ShopCode: uniqueCode,
		Level:    level,
		Status:   1,
	}

	if parentID != nil {
		shop.ParentID = parentID
	}

	err := db.Create(shop).Error
	require.NoError(t, err)

	return shop
}

// SetupAuthMiddleware 设置认证中间件（用于集成测试）
func SetupAuthMiddleware(t *testing.T, tokenManager *auth.TokenManager, allowedUserTypes []int) func(token string) bool {
	t.Helper()

	return func(token string) bool {
		ctx := context.Background()
		tokenInfo, err := tokenManager.ValidateAccessToken(ctx, token)
		if err != nil {
			return false
		}

		// 检查用户类型
		if len(allowedUserTypes) > 0 {
			allowed := false
			for _, userType := range allowedUserTypes {
				if tokenInfo.UserType == userType {
					allowed = true
					break
				}
			}
			if !allowed {
				return false
			}
		}

		return true
	}
}