package service

import (
	"carrotskin/internal/model"
	"carrotskin/pkg/auth"
	"context"
	"testing"

	"go.uber.org/zap"
)

func TestUserServiceImpl_Register(t *testing.T) {
	// 准备依赖
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	// 初始化Service
	// 注意：redisClient 和 storageClient 传入 nil，因为 Register 方法中没有使用它们
	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)

	ctx := context.Background()

	// 测试用例
	tests := []struct {
		name       string
		username   string
		password   string
		email      string
		avatar     string
		wantErr    bool
		errMsg     string
		setupMocks func()
	}{
		{
			name:     "正常注册",
			username: "testuser",
			password: "password123",
			email:    "test@example.com",
			avatar:   "",
			wantErr:  false,
		},
		{
			name:     "用户名已存在",
			username: "existinguser",
			password: "password123",
			email:    "new@example.com",
			avatar:   "",
			wantErr:  true,
			// 服务实现现已统一使用 apperrors.ErrUserAlreadyExists，错误信息为“用户已存在”
			errMsg: "用户已存在",
			setupMocks: func() {
				_ = userRepo.Create(context.Background(), &model.User{
					Username: "existinguser",
					Email:    "old@example.com",
				})
			},
		},
		{
			name:     "邮箱已存在",
			username: "newuser",
			password: "password123",
			email:    "existing@example.com",
			avatar:   "",
			wantErr:  true,
			errMsg:   "邮箱已被注册",
			setupMocks: func() {
				_ = userRepo.Create(context.Background(), &model.User{
					Username: "otheruser",
					Email:    "existing@example.com",
				})
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			// 重置mock状态
			if tt.setupMocks != nil {
				tt.setupMocks()
			}

			user, token, err := userService.Register(ctx, tt.username, tt.password, tt.email, tt.avatar)

			if tt.wantErr {
				if err == nil {
					t.Error("期望返回错误，但实际没有错误")
					return
				}
				if tt.errMsg != "" && err.Error() != tt.errMsg {
					t.Errorf("错误信息不匹配: got %v, want %v", err.Error(), tt.errMsg)
				}
			} else {
				if err != nil {
					t.Errorf("不期望返回错误: %v", err)
					return
				}
				if user == nil {
					t.Error("返回的用户不应为nil")
				}
				if token == "" {
					t.Error("返回的Token不应为空")
				}
				if user.Username != tt.username {
					t.Errorf("用户名不匹配: got %v, want %v", user.Username, tt.username)
				}
			}
		})
	}
}

func TestUserServiceImpl_Login(t *testing.T) {
	// 准备依赖
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	// 预置用户
	password := "password123"
	hashedPassword, _ := auth.HashPassword(password)
	testUser := &model.User{
		Username: "testlogin",
		Email:    "login@example.com",
		Password: hashedPassword,
		Status:   1,
	}
	_ = userRepo.Create(context.Background(), testUser)

	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)

	ctx := context.Background()

	tests := []struct {
		name            string
		usernameOrEmail string
		password        string
		wantErr         bool
		errMsg          string
	}{
		{
			name:            "用户名登录成功",
			usernameOrEmail: "testlogin",
			password:        "password123",
			wantErr:         false,
		},
		{
			name:            "邮箱登录成功",
			usernameOrEmail: "login@example.com",
			password:        "password123",
			wantErr:         false,
		},
		{
			name:            "密码错误",
			usernameOrEmail: "testlogin",
			password:        "wrongpassword",
			wantErr:         true,
			errMsg:          "用户名/邮箱或密码错误",
		},
		{
			name:            "用户不存在",
			usernameOrEmail: "nonexistent",
			password:        "password123",
			wantErr:         true,
			errMsg:          "用户名/邮箱或密码错误",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			user, token, err := userService.Login(ctx, tt.usernameOrEmail, tt.password, "127.0.0.1", "test-agent")

			if tt.wantErr {
				if err == nil {
					t.Error("期望返回错误，但实际没有错误")
				} else if tt.errMsg != "" && err.Error() != tt.errMsg {
					t.Errorf("错误信息不匹配: got %v, want %v", err.Error(), tt.errMsg)
				}
			} else {
				if err != nil {
					t.Errorf("不期望返回错误: %v", err)
				}
				if user == nil {
					t.Error("用户不应为nil")
				}
				if token == "" {
					t.Error("Token不应为空")
				}
			}
		})
	}
}

// TestUserServiceImpl_BasicGetters 测试 GetByID / GetByEmail / UpdateInfo / UpdateAvatar
func TestUserServiceImpl_BasicGettersAndUpdates(t *testing.T) {
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	// 预置用户
	user := &model.User{
		ID:       1,
		Username: "basic",
		Email:    "basic@example.com",
		Avatar:   "",
	}
	_ = userRepo.Create(context.Background(), user)

	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)

	ctx := context.Background()

	// GetByID
	gotByID, err := userService.GetByID(ctx, 1)
	if err != nil || gotByID == nil || gotByID.ID != 1 {
		t.Fatalf("GetByID 返回不正确: user=%+v, err=%v", gotByID, err)
	}

	// GetByEmail
	gotByEmail, err := userService.GetByEmail(ctx, "basic@example.com")
	if err != nil || gotByEmail == nil || gotByEmail.Email != "basic@example.com" {
		t.Fatalf("GetByEmail 返回不正确: user=%+v, err=%v", gotByEmail, err)
	}

	// UpdateInfo
	user.Username = "updated"
	if err := userService.UpdateInfo(ctx, user); err != nil {
		t.Fatalf("UpdateInfo 失败: %v", err)
	}
	updated, _ := userRepo.FindByID(context.Background(), 1)
	if updated.Username != "updated" {
		t.Fatalf("UpdateInfo 未更新用户名, got=%s", updated.Username)
	}

	// UpdateAvatar 只需确认不会返回错误（具体字段更新由仓库层保证）
	if err := userService.UpdateAvatar(ctx, 1, "http://example.com/avatar.png"); err != nil {
		t.Fatalf("UpdateAvatar 失败: %v", err)
	}
}

// TestUserServiceImpl_ChangePassword 测试 ChangePassword
func TestUserServiceImpl_ChangePassword(t *testing.T) {
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	hashed, _ := auth.HashPassword("oldpass")
	user := &model.User{
		ID:       1,
		Username: "changepw",
		Password: hashed,
	}
	_ = userRepo.Create(context.Background(), user)

	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)

	ctx := context.Background()

	// 原密码正确
	if err := userService.ChangePassword(ctx, 1, "oldpass", "newpass"); err != nil {
		t.Fatalf("ChangePassword 正常情况失败: %v", err)
	}

	// 用户不存在
	if err := userService.ChangePassword(ctx, 999, "oldpass", "newpass"); err == nil {
		t.Fatalf("ChangePassword 应在用户不存在时返回错误")
	}

	// 原密码错误
	if err := userService.ChangePassword(ctx, 1, "wrong", "another"); err == nil {
		t.Fatalf("ChangePassword 应在原密码错误时返回错误")
	}
}

// TestUserServiceImpl_ResetPassword 测试 ResetPassword
func TestUserServiceImpl_ResetPassword(t *testing.T) {
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	user := &model.User{
		ID:       1,
		Username: "resetpw",
		Email:    "reset@example.com",
	}
	_ = userRepo.Create(context.Background(), user)

	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)

	ctx := context.Background()

	// 正常重置
	if err := userService.ResetPassword(ctx, "reset@example.com", "newpass"); err != nil {
		t.Fatalf("ResetPassword 正常情况失败: %v", err)
	}

	// 用户不存在
	if err := userService.ResetPassword(ctx, "notfound@example.com", "newpass"); err == nil {
		t.Fatalf("ResetPassword 应在用户不存在时返回错误")
	}
}

// TestUserServiceImpl_ChangeEmail 测试 ChangeEmail
func TestUserServiceImpl_ChangeEmail(t *testing.T) {
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	user1 := &model.User{ID: 1, Email: "user1@example.com"}
	user2 := &model.User{ID: 2, Email: "user2@example.com"}
	_ = userRepo.Create(context.Background(), user1)
	_ = userRepo.Create(context.Background(), user2)

	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)

	ctx := context.Background()

	// 正常修改
	if err := userService.ChangeEmail(ctx, 1, "new@example.com"); err != nil {
		t.Fatalf("ChangeEmail 正常情况失败: %v", err)
	}

	// 邮箱被其他用户占用
	if err := userService.ChangeEmail(ctx, 1, "user2@example.com"); err == nil {
		t.Fatalf("ChangeEmail 应在邮箱被占用时返回错误")
	}
}

// TestUserServiceImpl_ValidateAvatarURL 测试 ValidateAvatarURL
func TestUserServiceImpl_ValidateAvatarURL(t *testing.T) {
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)

	ctx := context.Background()

	tests := []struct {
		name    string
		url     string
		wantErr bool
	}{
		{"空字符串通过", "", false},
		{"相对路径通过", "/images/avatar.png", false},
		{"非法URL格式", "://bad-url", true},
		{"非法协议", "ftp://example.com/avatar.png", true},
		{"缺少主机名", "http:///avatar.png", true},
		{"本地域名通过", "http://localhost/avatar.png", false},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := userService.ValidateAvatarURL(ctx, tt.url)
			if (err != nil) != tt.wantErr {
				t.Fatalf("ValidateAvatarURL(%q) error = %v, wantErr=%v", tt.url, err, tt.wantErr)
			}
		})
	}
}

// TestUserServiceImpl_MaxLimits 测试 GetMaxProfilesPerUser / GetMaxTexturesPerUser
// 现在配置从环境变量读取，测试默认值
func TestUserServiceImpl_MaxLimits(t *testing.T) {
	userRepo := NewMockUserRepository()
	jwtService := auth.NewJWTService("secret", 1)
	logger := zap.NewNop()

	// 未配置时走默认值
	cacheManager := NewMockCacheManager()
	userService := NewUserService(userRepo, jwtService, nil, cacheManager, nil, logger)
	if got := userService.GetMaxProfilesPerUser(); got != 5 {
		t.Fatalf("GetMaxProfilesPerUser 默认值错误, got=%d", got)
	}
	if got := userService.GetMaxTexturesPerUser(); got != 50 {
		t.Fatalf("GetMaxTexturesPerUser 默认值错误, got=%d", got)
	}
}