package handlers

import (
	"context"
	"encoding/json"
	"fmt"
	"go-udemy-web-1/internal/models"
	"log"
	"net/http"
	"net/http/httptest"
	"strconv"
	"strings"
	"testing"
	"time"
)

type postData struct {
	key   string
	value string
}

var theTests = []struct {
	name               string
	url                string
	method             string
	expectedStatusCode int
}{
	{"home", "/", "GET", http.StatusOK},
	{"about", "/about", "GET", http.StatusOK},
	{"gq", "/generals-quarters", "GET", http.StatusOK},
	{"ms", "/majors-suite", "GET", http.StatusOK},
	{"sa", "/availability", "GET", http.StatusOK},
	{"contact", "/contact", "GET", http.StatusOK},

	// {"post-search-avail", "/availability", "POST", []postData{
	// 	{key: "start", value: "2020-01-01"},
	// 	{key: "end", value: "2020-01-02"},
	// }, http.StatusOK},
	// {"post-search-avail-json", "/availability-json", "POST", []postData{
	// 	{key: "start", value: "2020-01-01"},
	// 	{key: "end", value: "2020-01-02"},
	// }, http.StatusOK},
	// {"make-reservation", "/make-reservation", "POST", []postData{
	// 	{key: "first_name", value: "John"},
	// 	{key: "last_name", value: "Smith"},
	// 	{key: "email", value: "me@here.com"},
	// 	{key: "phone", value: "12345"},
	// }, http.StatusOK},
}

func TestHandlers(t *testing.T) {
	routes := getRoutes()
	ts := httptest.NewTLSServer(routes)
	defer ts.Close()

	for _, e := range theTests {
		resp, err := ts.Client().Get(ts.URL + e.url)
		if err != nil {
			t.Log(err)
			t.Fatal(err)
		}
		if resp.StatusCode != e.expectedStatusCode {
			t.Errorf("for %s, expected %d but got %d\n", e.name, e.expectedStatusCode, resp.StatusCode)
		}
	}
}

// {{{ Make Reservation Tests

var makeReservationTests = []struct {
	name               string
	roomID             int
	expectedStatusCode int
}{
	{"ok", 1, http.StatusOK},
	{"no session", 0, http.StatusTemporaryRedirect},
	{"non-existant room", 100, http.StatusTemporaryRedirect},
}

func TestRepository_MakeReservation(t *testing.T) {
	for _, test := range makeReservationTests {
		reservation := models.Reservation{
			RoomID: test.roomID,
			Room: models.Room{
				ID:       test.roomID,
				RoomName: "Room name",
			},
		}
		req, _ := http.NewRequest("GET", "/make-reservation", nil)
		ctx := getCtx(req)
		req = req.WithContext(ctx)
		rr := httptest.NewRecorder()
		if test.roomID == 0 {
			session.Put(ctx, "reservation", nil)
		} else {
			session.Put(ctx, "reservation", reservation)
		}
		handler := http.HandlerFunc(Repo.MakeReservation)

		handler.ServeHTTP(rr, req)

		if rr.Code != test.expectedStatusCode {
			t.Errorf("for %s, reservation handler returned response code: got %d, wanted %d\n",
				test.name, rr.Code, http.StatusOK)
		}
	}
}

// }}}
// {{{ PostMakeReservation tests

var postMakeReservationTests = []struct {
	name            string
	reservationInfo []postData

	expectedStatusCode int
}{
	{
		"ok",
		[]postData{
			{key: "first_name", value: "John"},
			{key: "last_name", value: "Smith"},
			{key: "email", value: "john@smith.com"},
			{key: "phone", value: "1234"},
			{key: "room_id", value: "1"},
			{key: "start_date", value: "2050-01-01"},
			{key: "end_date", value: "2050-01-02"},
		},
		http.StatusSeeOther,
	},
	{
		"no_session",
		[]postData{
			{key: "first_name", value: "John"},
			{key: "last_name", value: "Smith"},
			{key: "email", value: "john@smith.com"},
			{key: "phone", value: "1234"},
			{key: "room_id", value: "0"},
			{key: "start_date", value: "2050-01-01"},
			{key: "end_date", value: "2050-01-02"},
		},
		http.StatusTemporaryRedirect,
	},
	{"no_post_data", []postData{}, http.StatusOK},
	{
		"missing first name",
		[]postData{
			{key: "last_name", value: "Smith"},
			{key: "email", value: "john@smith.com"},
			{key: "phone", value: "1234"},
			{key: "room_id", value: "1"},
			{key: "start_date", value: "2050-01-01"},
			{key: "end_date", value: "2050-01-02"},
		},
		http.StatusOK,
	},
	{
		"wrong first name",
		[]postData{
			{key: "first_name", value: "J"},
			{key: "last_name", value: "Smith"},
			{key: "email", value: "john@smith.com"},
			{key: "phone", value: "1234"},
			{key: "room_id", value: "1"},
			{key: "start_date", value: "2050-01-01"},
			{key: "end_date", value: "2050-01-02"},
		},
		http.StatusOK,
	},
	{
		"wrong email",
		[]postData{
			{key: "first_name", value: "John"},
			{key: "last_name", value: "Smith"},
			{key: "email", value: "john@smith"},
			{key: "phone", value: "1234"},
			{key: "room_id", value: "1"},
			{key: "start_date", value: "2050-01-01"},
			{key: "end_date", value: "2050-01-02"},
		},
		http.StatusOK,
	},
	{
		"insert reservation error",
		[]postData{
			{key: "first_name", value: "John"},
			{key: "last_name", value: "Smith"},
			{key: "email", value: "john@smith.com"},
			{key: "phone", value: "1234"},
			{key: "room_id", value: "2"},
			{key: "start_date", value: "2050-01-01"},
			{key: "end_date", value: "2050-01-02"},
		},
		http.StatusTemporaryRedirect,
	},
	{
		"insert room restriction error",
		[]postData{
			{key: "first_name", value: "John"},
			{key: "last_name", value: "Smith"},
			{key: "email", value: "john@smith.com"},
			{key: "phone", value: "1234"},
			{key: "room_id", value: "100"},
			{key: "start_date", value: "2050-01-01"},
			{key: "end_date", value: "2050-01-02"},
		},
		http.StatusTemporaryRedirect,
	},
}

func TestRepository_PostMakeReservation(t *testing.T) {
	for _, test := range postMakeReservationTests {
		roomID := 1
		var reqBody string
		if len(test.reservationInfo) > 0 {
			if test.reservationInfo[0].key == "room_id" {
				roomID, _ = strconv.Atoi(test.reservationInfo[0].value)
			}
			reqBody = fmt.Sprintf("%s=%s", test.reservationInfo[0].key,
				test.reservationInfo[0].value)
			for _, element := range test.reservationInfo[1:] {
				reqBody = fmt.Sprintf("%s&%s=%s", reqBody, element.key,
					element.value)
				if element.key == "room_id" {
					roomID, _ = strconv.Atoi(element.value)
				}
			}
		}
		layout := "2006-01-02"
		sd, _ := time.Parse(layout, "2050-01-01")
		ed, _ := time.Parse(layout, "2050-01-02")
		reservation := models.Reservation{
			RoomID:    roomID,
			StartDate: sd,
			EndDate:   ed,
		}

		req, _ := http.NewRequest("POST", "/make-reservation", strings.NewReader(reqBody))
		ctx := getCtx(req)
		req = req.WithContext(ctx)
		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

		rr := httptest.NewRecorder()
		if roomID == 0 {
			session.Put(ctx, "reservation", nil)
		} else {
			session.Put(ctx, "reservation", reservation)
		}

		handler := http.HandlerFunc(Repo.PostMakeReservation)
		handler.ServeHTTP(rr, req)

		if rr.Code != test.expectedStatusCode {
			t.Errorf("for %s, reservation handler returned response code: got %d, wanted %d\n",
				test.name, rr.Code, test.expectedStatusCode)
		}
	}
}

// }}}
// {{{ Test AvailabilityJSON

var availabilityJSONTests = []struct {
	name               string
	queryInfo          []postData
	expectedStatusJSON jsonResponse
}{
	{"ok", []postData{
		{key: "start", value: "2050-01-01"},
		{key: "end", value: "2050-01-02"},
		{key: "room_id", value: "1"},
	}, jsonResponse{
		OK:        true,
		Message:   "",
		StartDate: "2050-01-01",
		EndDate:   "2050-01-02",
		RoomID:    "1",
	}},
	{"wrong date", []postData{
		{key: "start", value: "2050-01"},
		{key: "end", value: "2050-01-02"},
		{key: "room_id", value: "1"},
	}, jsonResponse{
		OK:      false,
		Message: "Wrong startDate",
	}},
}

func Test_AvailabilityJSON(t *testing.T) {
	for _, test := range availabilityJSONTests {
		var reqBody string
		reqBody = fmt.Sprintf("%s=%s", test.queryInfo[0].key,
			test.queryInfo[0].value)
		for _, element := range test.queryInfo[1:] {
			reqBody = fmt.Sprintf("%s&%s=%s", reqBody, element.key,
				element.value)
		}

		req, _ := http.NewRequest("POST", "/make-reservation", strings.NewReader(reqBody))
		ctx := getCtx(req)
		req = req.WithContext(ctx)
		req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

		rr := httptest.NewRecorder()

		handler := http.HandlerFunc(Repo.AvailabilityJSON)
		handler.ServeHTTP(rr, req)

		if rr.Code != http.StatusOK {
			t.Errorf("for %s, reservation handler returned response code: got %d, wanted %d\n",
				test.name, rr.Code, http.StatusOK)
		}

		var j jsonResponse
		err := json.Unmarshal(rr.Body.Bytes(), &j)
		if err != nil {
			t.Errorf("for %s, failed to parse json", test.name)
		}
		if j != test.expectedStatusJSON {
			expected, _ := json.MarshalIndent(test.expectedStatusJSON, "", "    ")
			t.Errorf("for %s, returned json is wrong, expected: %s, returned: %s",
				test.name, expected, rr.Body.String())
		}

	}
}

// }}}
// {{{ Test Helpers

func getCtx(req *http.Request) context.Context {
	ctx, err := session.Load(req.Context(), req.Header.Get("X-Session"))
	if err != nil {
		log.Println(err)
	}

	return ctx
}

// }}}