package services

import (
	"encoding/json"
	"testing"
	"time"

	"git.devices.local/mawas/golang-api-skeleton/lib/cache"
	"git.devices.local/mawas/golang-api-skeleton/lib/common"
	"git.devices.local/mawas/golang-api-skeleton/models"
	"git.devices.local/mawas/golang-api-skeleton/repositories"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

const username = "unittest"

func userServiceMock(t *testing.T) (models.User, *UserService) {
	db, err := gorm.Open(
		sqlite.Open(":memory:"),
		&gorm.Config{DisableForeignKeyConstraintWhenMigrating: true},
	)
	if err != nil {
		t.Error(err)
	}
	if err := db.AutoMigrate(&models.User{}); err != nil {
		t.Error(err)
	}
	if err := db.AutoMigrate(&models.Token{}); err != nil {
		t.Error(err)
	}
	appCache, err := cache.Bootstrap()
	if err != nil {
		t.Error(err)
	}
	userID, err := common.NewGUID()
	if err != nil {
		t.Error(err)
	}
	if err := appCache.Set("user:"+userID.String(), username); err != nil {
		t.Error(err)
	}
	if err := appCache.Set("user:"+username, userID.String()); err != nil {
		t.Error(err)
	}
	user := NewUser(username, "Unit", "Test", "unittest@unittest.test")
	user.ID = userID
	userRepository := repositories.NewUserRepository(db, user.ID.String(), username, appCache)
	return user, NewUserService(userRepository)
}

func validateUserResponse(t *testing.T, response *models.User, user models.User) {
	if response.Username != user.Username {
		t.Errorf("User Username must be \"%s\" but is \"%s\"\n", user.Username, response.Username)
	}
	if response.Firstname != user.Firstname {
		t.Errorf("User Firstname must be \"%s\" but is \"%s\"\n", user.Firstname, response.Firstname)
	}
	if response.Lastname != user.Lastname {
		t.Errorf("User Lastname must be \"%s\" but is \"%s\"\n", user.Lastname, response.Lastname)
	}
	if response.Email != user.Email {
		t.Errorf("User Email must be \"%s\" but is \"%s\"\n", user.Email, response.Email)
	}
	if !response.Active {
		t.Error("User Active must be true")
	}
	if len(response.TokensRef) > 0 {
		t.Error("User TokensRef must be empty")
	}
	if len(response.Tokens) > 0 {
		t.Error("User Tokens must be empty")
	}
	jsonString, err := json.Marshal(response)
	if err != nil {
		t.Error(err)
	}
	var j map[string]interface{}
	if err := json.Unmarshal([]byte(jsonString), &j); err != nil {
		t.Error(err)
	}
	if _, exists := j["id"]; exists {
		t.Error("User ID must be hidden in json")
	}
	if u, exists := j["created_by"]; !exists {
		t.Error("User created_by not in json")
	} else if u != username {
		t.Errorf("User created_by must be \"%s\" but is \"%s\"\n", username, u)
	}
	if u, exists := j["updated_by"]; !exists {
		t.Error("User updated_by not in json")
	} else if u != username {
		t.Errorf("User updated_by must be \"%s\" but is \"%s\"\n", username, u)
	}
	if datetime, exists := j["created_at"]; !exists {
		t.Error("User created_at not in json")
	} else if _, err := time.Parse(time.RFC3339, datetime.(string)); err != nil {
		t.Errorf("User created_at must be a valid rfc 3339 date time in json, but is \"%s\"", datetime)
	}
	if datetime, exists := j["updated_at"]; !exists {
		t.Error("User updated_at not in json")
	} else if _, err := time.Parse(time.RFC3339, datetime.(string)); err != nil {
		t.Errorf("User updated_at must be a valid rfc 3339 date time in json, but is \"%s\"", datetime)
	}
	if _, exists := j["deleted_by"]; exists {
		t.Error("User deleted_by mustn't be set in json")
	}
	if _, exists := j["deleted_at"]; exists {
		t.Error("User deleted_by mustn't be set in json")
	}
}

func TestUserRepository(t *testing.T) {
	user, userService := userServiceMock(t)
	if response, err := userService.Create([]*models.User{&user}); err != nil {
		t.Errorf("userService Create failed with error: %v\n", err)
	} else {
		if len(response) != 1 {
			t.Error("userService Create response must be a list with 1 result in this test")
		} else {
			validateUserResponse(t, response[0], user)
		}
	}
	if response, err := userService.ReadByID(username); err != nil {
		t.Errorf("userService ReadByID failed with error: %v\n", err)
	} else {
		validateUserResponse(t, response, user)
	}
	{
		response, err := userService.ReadAll()
		switch {
		case err != nil:
			t.Errorf("userService ReadAll failed with error: %v\n", err)
		case len(response) != 1:
			t.Error("userService ReadAll failed with worng numer of responses")
		default:
			validateUserResponse(t, response[0], user)
		}
	}
}