package Api

import (
	"encoding/json"
	"errors"
	"fmt"
	"math/rand"
	"net/http"
	"net/http/httptest"
	"os"
	"path"
	"runtime"
	"strings"
	"testing"
	"time"

	"git.tovijaeschke.xyz/tovi/SuddenImpactRecords/Api/Auth"
	"git.tovijaeschke.xyz/tovi/SuddenImpactRecords/Database"
	"git.tovijaeschke.xyz/tovi/SuddenImpactRecords/Models"
	"github.com/gorilla/mux"
)

func init() {
	// Fix working directory for tests
	_, filename, _, _ := runtime.Caller(0)
	dir := path.Join(path.Dir(filename), "..")
	err := os.Chdir(dir)
	if err != nil {
		panic(err)
	}

	Database.InitTest()

	r = mux.NewRouter()
}

var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")

func randString(n int) string {
	b := make([]rune, n)
	for i := range b {
		b[i] = letterRunes[rand.Intn(len(letterRunes))]
	}
	return string(b)
}

func createTestUser(random bool) (Models.User, error) {
	now := time.Now()

	email := "email@email.com"
	if random {
		email = fmt.Sprintf("%s@email.com", randString(16))
	}

	password, err := Auth.HashPassword("password")
	if err != nil {
		return Models.User{}, err
	}

	userData := Models.User{
		Email:     email,
		Password:  password,
		LastLogin: &now,
		FirstName: "Hugh",
		LastName:  "Mann",
	}

	err = Database.CreateUser(&userData)
	return userData, err
}

func login() (*http.Cookie, Models.User, error) {
	var (
		c *http.Cookie
		u Models.User
	)

	r.HandleFunc("/admin/login", Auth.Login).Methods("POST")

	ts := httptest.NewServer(r)

	defer ts.Close()

	u, err := createTestUser(true)
	if err != nil {
		return c, u, err
	}

	postJson := `
{
	"email": "%s",
	"password": "password"
}
`
	postJson = fmt.Sprintf(postJson, u.Email)

	res, err := http.Post(ts.URL+"/admin/login", "application/json", strings.NewReader(postJson))
	if err != nil {
		return c, u, err
	}

	if res.StatusCode != http.StatusOK {
		return c, u, errors.New("Invalid res.StatusCode")
	}

	if len(res.Cookies()) != 1 {
		return c, u, errors.New("Invalid cookies length")
	}

	return res.Cookies()[0], u, nil
}

func Test_getUser(t *testing.T) {
	t.Log("Testing getUser...")

	r.HandleFunc("/user/{userID}", getUser).Methods("GET")

	ts := httptest.NewServer(r)

	defer ts.Close()

	c, u, err := login()
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	req, err := http.NewRequest("GET", fmt.Sprintf(
		"%s/user/%s",
		ts.URL,
		u.ID,
	), nil)

	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	req.AddCookie(c)

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	if res.StatusCode != http.StatusOK {
		t.Errorf("Expected %d, recieved %d", http.StatusOK, res.StatusCode)
		t.FailNow()
	}

	getUserData := new(Models.User)
	err = json.NewDecoder(res.Body).Decode(getUserData)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	if getUserData.Email != u.Email {
		t.Errorf("Expected email \"%s\", recieved %s", u.Email, getUserData.Email)
		t.FailNow()
	}

	if getUserData.FirstName != u.FirstName {
		t.Errorf("Expected email \"%s\", recieved %s", u.FirstName, getUserData.FirstName)
		t.FailNow()
	}

	if getUserData.LastName != u.LastName {
		t.Errorf("Expected email \"%s\", recieved %s", u.LastName, getUserData.LastName)
		t.FailNow()
	}
}

func Test_getUsers(t *testing.T) {
	t.Log("Testing getUsers...")

	r.HandleFunc("/user", getUsers).Methods("GET")

	ts := httptest.NewServer(r)
	defer ts.Close()

	c, _, err := login()
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	for i := 0; i < 20; i++ {
		createTestUser(true)
	}

	req, err := http.NewRequest("GET", ts.URL+"/user?page=0&pageSize=10", nil)

	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	req.AddCookie(c)

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	if res.StatusCode != http.StatusOK {
		t.Errorf("Expected %d, recieved %d", http.StatusOK, res.StatusCode)
		t.FailNow()
	}

	getUsersData := new([]Models.User)
	err = json.NewDecoder(res.Body).Decode(getUsersData)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	if len(*getUsersData) != 10 {
		t.Errorf("Expected 10, recieved %d", len(*getUsersData))
		t.FailNow()
	}
}

func Test_createUser(t *testing.T) {
	t.Log("Testing createUser...")

	r.HandleFunc("/user", createUser).Methods("POST")

	ts := httptest.NewServer(r)

	defer ts.Close()

	email := fmt.Sprintf("%s@email.com", randString(16))

	postJson := `
{
	"email": "%s",
	"password": "password",
	"confirm_password": "password",
	"first_name": "Hugh",
	"last_name": "Mann"
}
`
	postJson = fmt.Sprintf(postJson, email)

	res, err := http.Post(ts.URL+"/user", "application/json", strings.NewReader(postJson))
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		return
	}

	if res.StatusCode != http.StatusOK {
		t.Errorf("Expected %d, recieved %d", http.StatusOK, res.StatusCode)
		return
	}
}

func Test_updateUser(t *testing.T) {
	t.Log("Testing updateUser...")

	r.HandleFunc("/user/{userID}", updateUser).Methods("PUT")

	ts := httptest.NewServer(r)

	defer ts.Close()

	c, u, err := login()
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	email := fmt.Sprintf("%s@email.com", randString(16))

	postJson := `
{
	"email": "%s",
	"first_name": "first",
	"last_name": "last"
}
`
	postJson = fmt.Sprintf(postJson, email)

	req, err := http.NewRequest("PUT", fmt.Sprintf(
		"%s/user/%s",
		ts.URL,
		u.ID,
	), strings.NewReader(postJson))

	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
	}

	req.AddCookie(c)

	// Fetch Request
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
	}
	defer res.Body.Close()

	if res.StatusCode != http.StatusOK {
		t.Errorf("Expected %d, recieved %d", http.StatusOK, res.StatusCode)
	}

	updateUserData := new(Models.User)
	err = json.NewDecoder(res.Body).Decode(updateUserData)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
	}

	if updateUserData.Email != email {
		t.Errorf("Expected email \"%s\", recieved %s", email, updateUserData.Email)
	}

	if updateUserData.FirstName != "first" {
		t.Errorf("Expected FirstName \"first\", recieved %s", updateUserData.FirstName)
	}

	if updateUserData.LastName != "last" {
		t.Errorf("Expected LastName \"last\", recieved %s", updateUserData.LastName)
	}
}

func Test_deleteUser(t *testing.T) {
	t.Log("Testing deleteUser...")

	r.HandleFunc("/user/{userID}", deleteUser).Methods("DELETE")

	ts := httptest.NewServer(r)

	defer ts.Close()

	c, _, err := login()
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	userData, err := createTestUser(true)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		t.FailNow()
	}

	req, err := http.NewRequest("DELETE", fmt.Sprintf(
		"%s/user/%s",
		ts.URL,
		userData.ID,
	), nil)

	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
	}

	req.AddCookie(c)

	// Fetch Request
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		t.Errorf("Expected nil, recieved %s", err.Error())
		return
	}
	defer res.Body.Close()

	if res.StatusCode != http.StatusOK {
		t.Errorf("Expected %d, recieved %d", http.StatusOK, res.StatusCode)
	}
}