package user

import (
	"bytes"
	"encoding/json"
	"io/ioutil"
	"net/http/httptest"
	"testing"

	"git.samuelpua.com/telboon/ktm-train-bot/backend/internal/common"
)

func TestRegistration(t *testing.T) {
	db := common.TestDBInit()
	defer common.DestroyTestingDB(db)
	db.AutoMigrate(&User{})
	db.AutoMigrate(&Profile{})
	db.AutoMigrate(&Session{})
	t.Setenv("ALLOW_REGISTRATION", "true")
	router := UserRoutes(db)
	testCases := []struct {
		username   string
		password   string
		statusCode int
	}{
		{
			username:   "testusername",
			password:   "testpassword",
			statusCode: 201,
		},
		{
			username:   "",
			password:   "testpassword",
			statusCode: 422,
		},
		{
			username:   "testusername",
			password:   "",
			statusCode: 422,
		},
		{
			username:   "t",
			password:   "testpassword",
			statusCode: 422,
		},
		{
			username:   "testusername",
			password:   "test",
			statusCode: 422,
		},
	}
	for _, currentTestCase := range testCases {
		rr := httptest.NewRecorder()
		currBody := struct {
			Username string `json:"username"`
			Password string `json:"password"`
		}{
			Username: currentTestCase.username,
			Password: currentTestCase.password,
		}
		reqBody, err := json.Marshal(currBody)
		if err != nil {
			t.Errorf("Error creating a new request body: %v", err)
		}
		reqBodyReader := bytes.NewReader(reqBody)
		req := httptest.NewRequest("POST", "/register", reqBodyReader)
		router.ServeHTTP(rr, req)
		// Check results
		if rr.Code != currentTestCase.statusCode {
			t.Errorf("Expected status code %d, got %d", currentTestCase.statusCode, rr.Code)
		}
	}
}

func TestLogin(t *testing.T) {
	db := common.TestDBInit()
	defer common.DestroyTestingDB(db)
	db.AutoMigrate(&User{})
	db.AutoMigrate(&Profile{})
	db.AutoMigrate(&Session{})
	t.Setenv("ALLOW_REGISTRATION", "true")
	t.Setenv("COOKIE_STRING", "supercustomcookie")
	router := UserRoutes(db)
	testCases := []struct {
		username   string
		password   string
		statusCode int
	}{
		{
			username:   "testusername",
			password:   "testpassword",
			statusCode: 200,
		},
		{
			username:   "",
			password:   "testpassword",
			statusCode: 422,
		},
		{
			username:   "testusername",
			password:   "",
			statusCode: 422,
		},
		{
			username:   "t",
			password:   "testpassword",
			statusCode: 422,
		},
		{
			username:   "testusername",
			password:   "test",
			statusCode: 500,
		},
		{
			username:   "testusername",
			password:   "",
			statusCode: 422,
		},
	}

	// Register user
	rr := httptest.NewRecorder()
	currBody := struct {
		Username string `json:"username"`
		Password string `json:"password"`
	}{
		Username: "testusername",
		Password: "testpassword",
	}
	reqBody, err := json.Marshal(currBody)
	if err != nil {
		t.Errorf("Error creating a new request body: %v", err)
	}
	reqBodyReader := bytes.NewReader(reqBody)
	req := httptest.NewRequest("POST", "/register", reqBodyReader)
	router.ServeHTTP(rr, req)

	// Check registration results
	if rr.Code != 201 {
		t.Errorf("Expected status code %d, got %d", 201, rr.Code)
	}
	for _, currentTestCase := range testCases {

		// Start checking login
		rrLogin := httptest.NewRecorder()
		currBody = struct {
			Username string `json:"username"`
			Password string `json:"password"`
		}{
			Username: currentTestCase.username,
			Password: currentTestCase.password,
		}
		reqBody, err = json.Marshal(currBody)
		if err != nil {
			t.Errorf("Error creating a new request body: %v", err)
		}
		reqBodyReader = bytes.NewReader(reqBody)
		req = httptest.NewRequest("POST", "/login", reqBodyReader)
		router.ServeHTTP(rrLogin, req)

		// Check login results
		if rrLogin.Code != currentTestCase.statusCode {
			t.Errorf("Expected status code %d, got %d", currentTestCase.statusCode, rrLogin.Code)
		}

		if rrLogin.Code == 200 {
			if rrLogin.Header().Get("Set-Cookie") == "" {
				t.Errorf("Expected a cookie to be set, but it wasn't")
			}
		}
	}
}

func TestGetMe(t *testing.T) {
	db := common.TestDBInit()
	defer common.DestroyTestingDB(db)
	db.AutoMigrate(&User{})
	db.AutoMigrate(&Profile{})
	db.AutoMigrate(&Session{})
	t.Setenv("ALLOW_REGISTRATION", "true")
	t.Setenv("COOKIE_STRING", "supercustomcookie")
	router := UserRoutes(db)
	testCases := []struct {
		cookieEnabled bool
		statusCode    int
	}{
		{
			cookieEnabled: true,
			statusCode:    200,
		},
		{
			cookieEnabled: false,
			statusCode:    500,
		},
	}

	// Register user
	rr := httptest.NewRecorder()
	currBody := struct {
		Username string `json:"username"`
		Password string `json:"password"`
	}{
		Username: "testusername",
		Password: "testpassword",
	}
	reqBody, err := json.Marshal(currBody)
	if err != nil {
		t.Errorf("Error creating a new request body: %v", err)
	}
	reqBodyReader := bytes.NewReader(reqBody)
	req := httptest.NewRequest("POST", "/register", reqBodyReader)
	router.ServeHTTP(rr, req)

	// Check registration results
	if rr.Code != 201 {
		t.Errorf("Expected status code %d, got %d", 201, rr.Code)
	}

	// Login to get cookie
	rr = httptest.NewRecorder()
	currBodyLogin := struct {
		Username string `json:"username"`
		Password string `json:"password"`
	}{
		Username: "testusername",
		Password: "testpassword",
	}
	reqBody, err = json.Marshal(currBodyLogin)
	if err != nil {
		t.Errorf("Error creating a new request body: %v", err)
	}
	reqBodyReader = bytes.NewReader(reqBody)
	req = httptest.NewRequest("POST", "/login", reqBodyReader)
	router.ServeHTTP(rr, req)

	for _, currentTestCase := range testCases {
		// Start checking Profile
		rrProfile := httptest.NewRecorder()
		if err != nil {
			t.Errorf("Error creating a new request body: %v", err)
		}
		req = httptest.NewRequest("GET", "/me", nil)
		if currentTestCase.cookieEnabled {
			req.AddCookie(rr.Result().Cookies()[0])
		}
		router.ServeHTTP(rrProfile, req)

		// Check Profile results
		if rrProfile.Code != currentTestCase.statusCode {
			t.Errorf("Expected status code %d, got %d", currentTestCase.statusCode, rrProfile.Code)
		}

		if currentTestCase.statusCode == 200 {
			var resultsObj map[string]any
			resBodyBytes, err := ioutil.ReadAll(rrProfile.Body)
			if err != nil {
				t.Errorf("Error reading response body: %v", err)
			}

			err = json.Unmarshal(resBodyBytes, &resultsObj)
			if err != nil {
				t.Errorf("Error unmarshalling response body: %v", err)
			}

			if resultsObj["username"] != "testusername" {
				t.Errorf("Expected username %s, got %s", "testusername", resultsObj["username"])
			}
		}
	}
}