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"
	"github.com/oklog/ulid"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

func tokenServiceMock(t *testing.T) (models.Token, *TokenService) {
	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)
	}
	userRepository := repositories.NewUserRepository(db, userID.String(), username, appCache)
	userService := NewUserService(userRepository)
	_, err = userService.Create([]*models.User{{
		ModelHiddenGUIDPK: common.ModelHiddenGUIDPK{ID: userID},
		Username:          username,
		Firstname:         "Unit",
		Lastname:          "Test",
		Email:             "unittest@unittest.test",
		Active:            true,
	}})
	if err != nil {
		t.Error(err)
	}
	token := NewToken(username)
	token.UserID = userID
	tokenRepository := repositories.NewTokenRepository(db, token.UserID.String(), username, appCache)
	return token, NewTokenService(tokenRepository)
}

func validateResponse(t *testing.T, response *models.Token, token models.Token) {
	if response.Username != token.Username {
		t.Errorf("Token Username must be \"%s\" but is \"%s\"\n", token.Username, response.Username)
	}
	if !response.Active {
		t.Error("Token Active must be true")
	}
	if _, err := ulid.Parse(response.Token.String()); err != nil {
		t.Errorf("Token Token must be a valid ULID, %v\n", err)
	}
	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["user_id"]; exists {
		t.Error("Token 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 datetime, exists := j["expires_at"]; !exists {
		t.Error("User expires_at not in json")
	} else if _, err := time.Parse(time.RFC3339, datetime.(string)); err != nil {
		t.Errorf("User expires_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")
	}
	if _, exists := j["last_used"]; exists {
		t.Error("User deleted_by mustn't be set in json")
	}
}

func TestTokenRepository(t *testing.T) {
	token, tokenService := tokenServiceMock(t)
	if response, err := tokenService.Create(&token); err != nil {
		t.Errorf("tokenService Create failed with error: %v\n", err)
	} else {
		validateResponse(t, response, token)
	}
	if response, err := tokenService.ReadByKey(token.Token.String()); err != nil {
		t.Errorf("tokenService ReadByKey failed with error: %v\n", err)
	} else {
		validateResponse(t, response, token)
	}
	{
		response, err := tokenService.ReadAll()
		switch {
		case err != nil:
			t.Errorf("tokenService ReadAll failed with error: %v\n", err)
		case len(response) != 1:
			t.Error("tokenService ReadAll failed with worng numer of responses")
		default:
			validateResponse(t, response[0], token)
		}
	}
}