package app

import (
	"context"
	"errors"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"evening_detective_server/internal/repos/teams_repo"
	"evening_detective_server/internal/services/game_service"
)

func TestTeamRegistrationHandler(t *testing.T) {
	valid := `{"name":"Команда","email":"captain@example.org","participantsCount":5}`
	for _, tc := range []struct {
		name, token, auth, gameID, deliveryID, body string
		serviceErr                                  error
		want                                        int
		called                                      bool
	}{
		{"success", "secret", "Bearer secret", "42", "delivery", valid, nil, 200, true},
		{"disabled", "", "Bearer secret", "42", "delivery", valid, nil, 503, false},
		{"no token", "secret", "", "42", "delivery", valid, nil, 401, false},
		{"wrong token", "secret", "Bearer wrong", "42", "delivery", valid, nil, 401, false},
		{"bad game", "secret", "Bearer secret", "0", "delivery", valid, nil, 400, false},
		{"no delivery", "secret", "Bearer secret", "42", "", valid, nil, 400, false},
		{"malformed", "secret", "Bearer secret", "42", "delivery", `{`, nil, 400, false},
		{"extra object", "secret", "Bearer secret", "42", "delivery", valid + ` {}`, nil, 400, false},
		{"unknown field", "secret", "Bearer secret", "42", "delivery", `{"extra":1}`, nil, 400, false},
		{"too large", "secret", "Bearer secret", "42", "delivery", `{"name":"` + strings.Repeat("a", 17000) + `"}`, nil, 400, false},
		{"invalid fields", "secret", "Bearer secret", "42", "delivery", valid, game_service.ErrInvalidRegistration, 400, true},
		{"closed", "secret", "Bearer secret", "42", "delivery", valid, teams_repo.ErrRegistrationClosed, 409, true},
		{"internal", "secret", "Bearer secret", "42", "delivery", valid, errors.New("private database detail"), 500, true},
	} {
		t.Run(tc.name, func(t *testing.T) {
			called := false
			mux := http.NewServeMux()
			mux.Handle("POST /api/games/{id}/registrations", TeamRegistrationHandler(tc.token, func(ctx context.Context, gameID int, deliveryID string, registration game_service.Registration) (int, error) {
				called = true
				if gameID != 42 || deliveryID != "delivery" || registration.Name != "Команда" || registration.Email != "captain@example.org" || registration.ParticipantsCount != 5 {
					t.Fatal("incorrect registration passed to service")
				}
				if _, ok := ctx.Deadline(); !ok {
					t.Fatal("missing deadline")
				}
				return 7, tc.serviceErr
			}))
			req := httptest.NewRequest(http.MethodPost, "/api/games/"+tc.gameID+"/registrations", strings.NewReader(tc.body))
			req.Header.Set("Authorization", tc.auth)
			req.Header.Set("X-Delivery-Id", tc.deliveryID)
			res := httptest.NewRecorder()
			mux.ServeHTTP(res, req)
			if res.Code != tc.want || called != tc.called {
				t.Fatalf("status=%d called=%v body=%s", res.Code, called, res.Body.String())
			}
			if tc.want == 200 && res.Body.String() != "{\"id\":7}\n" {
				t.Fatal(res.Body.String())
			}
			if strings.Contains(res.Body.String(), "private database detail") {
				t.Fatal("private error exposed")
			}
			if tc.name == "malformed" && !strings.Contains(res.Body.String(), "unexpected EOF") {
				t.Fatalf("malformed JSON reason missing: %s", res.Body.String())
			}
			if tc.name == "unknown field" && !strings.Contains(res.Body.String(), "unknown field") {
				t.Fatalf("unknown field reason missing: %s", res.Body.String())
			}
			if tc.name == "extra object" && !strings.Contains(res.Body.String(), "лишние данные") {
				t.Fatalf("extra data reason missing: %s", res.Body.String())
			}
		})
	}
}

func TestCaptainContactOnlyInGameDetails(t *testing.T) {
	team := &game_service.Team{ID: 1, CaptainEmail: "captain@example.org", ParticipantsCount: 5}
	details := mapGame(&game_service.Game{Teams: []*game_service.Team{team}})
	if details.Teams[0].CaptainEmail != team.CaptainEmail || details.Teams[0].ParticipantsCount != 5 {
		t.Fatal("registration details missing from organizer view")
	}
	if mapTeam(team).CaptainEmail != "" {
		t.Fatal("captain email exposed in shared team/results mapping")
	}
}