//go:build test
// +build test

package today

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"crussell/db"
	"crussell/testutils"
	"crussell/testutils/fixtures"
)

func createTodayService(t *testing.T, ctx context.Context, q db.Querier) string {
	t.Helper()
	var svcID string
	err := q.QueryRow(ctx, `
		INSERT INTO services (name, description, price, duration_minutes, is_active, minimum_age_required)
		VALUES ('Test Service', 'Description', 50.00, 60, true, 16)
		RETURNING id
	`).Scan(&svcID)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}
	return svcID
}

func addBookingService(t *testing.T, ctx context.Context, q db.Querier, bookingID, serviceID string) {
	t.Helper()
	_, err := q.Exec(ctx, `
		INSERT INTO booking_services (booking_id, service_id)
		VALUES ($1, $2)
	`, bookingID, serviceID)
	if err != nil {
		t.Fatalf("failed to add booking service: %v", err)
	}
}

func TestGetTodayAppointments_ShowsPreviousNameInAppointment(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var origFirstName, origLastName string
	err = tx.QueryRow(ctx, `SELECT n_first_name, n_last_name FROM users WHERE id = $1`, userID).Scan(&origFirstName, &origLastName)
	if err != nil {
		t.Fatalf("failed to query user name: %v", err)
	}

	_, err = tx.Exec(ctx, `
		INSERT INTO name_history (user_id, previous_first_name, previous_last_name)
		VALUES ($1, 'OldFirst', 'OldLast')
	`, userID)
	if err != nil {
		t.Fatalf("failed to insert name_history: %v", err)
	}

	svcID := createTodayService(t, ctx, tx)

	var bookingID string
	now := time.Now()
	bookingStart := time.Date(now.Year(), now.Month(), now.Day(), 10, 0, 0, 0, now.Location())
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, $2, 'in_progress')
		RETURNING id
	`, userID, bookingStart).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}
	addBookingService(t, ctx, tx, bookingID, svcID)

	req := httptest.NewRequest(http.MethodGet, "/api/admin/today/appointments", nil)
	req = req.WithContext(ctx)
	rr := httptest.NewRecorder()
	GetTodayAppointmentsHandler(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
	}

	var resp TodayAppointmentsResponse
	if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal: %v", err)
	}

	if len(resp.Appointments) == 0 {
		t.Fatal("expected at least 1 appointment")
	}

	found := false
	for _, a := range resp.Appointments {
		if a.UserID == userID {
			found = true
			if a.PreviousFirstName == nil || *a.PreviousFirstName != "OldFirst" {
				t.Errorf("expected previousFirstName 'OldFirst', got %v", a.PreviousFirstName)
			}
			if a.PreviousLastName == nil || *a.PreviousLastName != "OldLast" {
				t.Errorf("expected previousLastName 'OldLast', got %v", a.PreviousLastName)
			}
		}
	}
	if !found {
		t.Error("expected appointment for test user not found in response")
	}
}

func TestGetTodayAppointments_OmitsPreviousNameWhenNoHistory(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	svcID := createTodayService(t, ctx, tx)
	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, NOW() + INTERVAL '5 minutes', 'in_progress')
		RETURNING id
	`, userID).Scan(&bookingID)
	addBookingService(t, ctx, tx, bookingID, svcID)

	req := httptest.NewRequest(http.MethodGet, "/api/admin/today/appointments", nil)
	req = req.WithContext(ctx)
	rr := httptest.NewRecorder()
	GetTodayAppointmentsHandler(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
	}

	var resp TodayAppointmentsResponse
	if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal: %v", err)
	}

	for _, a := range resp.Appointments {
		if a.UserID == userID {
			if a.PreviousFirstName != nil {
				t.Errorf("expected previousFirstName nil (no history), got %v", *a.PreviousFirstName)
			}
			if a.PreviousLastName != nil {
				t.Errorf("expected previousLastName nil (no history), got %v", *a.PreviousLastName)
			}
		}
	}
}

func TestGetTodayAppointments_Empty(t *testing.T) {
	t.Parallel()
	ctx, _ := testutils.SetupTestTx(t)

	req := httptest.NewRequest(http.MethodGet, "/api/admin/today/appointments", nil)
	req = req.WithContext(ctx)
	rr := httptest.NewRecorder()
	GetTodayAppointmentsHandler(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
	}

	var resp TodayAppointmentsResponse
	if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal: %v", err)
	}

	if resp.Appointments == nil {
		t.Error("expected empty array, got nil")
	}
	if len(resp.Appointments) != 0 {
		t.Errorf("expected 0 appointments, got %d", len(resp.Appointments))
	}
}

func TestGetPendingApprovals_ShowsPreviousName(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	var origFirstName, origLastName string
	err = tx.QueryRow(ctx, `SELECT n_first_name, n_last_name FROM users WHERE id = $1`, userID).Scan(&origFirstName, &origLastName)
	if err != nil {
		t.Fatalf("failed to query user name: %v", err)
	}

	_, err = tx.Exec(ctx, `
		INSERT INTO name_history (user_id, previous_first_name, previous_last_name)
		VALUES ($1, 'OldFirst', 'OldLast')
	`, userID)
	if err != nil {
		t.Fatalf("failed to insert name_history: %v", err)
	}

	svcID := createTodayService(t, ctx, tx)
	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, NOW() + INTERVAL '1 day', 'pending')
		RETURNING id
	`, userID).Scan(&bookingID)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}
	addBookingService(t, ctx, tx, bookingID, svcID)

	req := httptest.NewRequest(http.MethodGet, "/api/admin/today/pending-approvals", nil)
	req = req.WithContext(ctx)
	rr := httptest.NewRecorder()
	GetPendingApprovalsHandler(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
	}

	var resp PendingApprovalsResponse
	if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal: %v", err)
	}

	if len(resp.Approvals) == 0 {
		t.Fatal("expected at least 1 pending approval")
	}

	found := false
	for _, a := range resp.Approvals {
		if a.UserID == userID {
			found = true
			if a.PreviousFirstName == nil || *a.PreviousFirstName != "OldFirst" {
				t.Errorf("expected previousFirstName 'OldFirst', got %v", a.PreviousFirstName)
			}
			if a.PreviousLastName == nil || *a.PreviousLastName != "OldLast" {
				t.Errorf("expected previousLastName 'OldLast', got %v", a.PreviousLastName)
			}
		}
	}
	if !found {
		t.Error("expected pending approval for test user not found")
	}
}

func TestGetPendingApprovals_OmitsPreviousNameWhenNoHistory(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	svcID := createTodayService(t, ctx, tx)
	var bookingID string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, NOW() + INTERVAL '1 day', 'pending')
		RETURNING id
	`, userID).Scan(&bookingID)
	addBookingService(t, ctx, tx, bookingID, svcID)

	req := httptest.NewRequest(http.MethodGet, "/api/admin/today/pending-approvals", nil)
	req = req.WithContext(ctx)
	rr := httptest.NewRecorder()
	GetPendingApprovalsHandler(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
	}

	var resp PendingApprovalsResponse
	if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal: %v", err)
	}

	for _, a := range resp.Approvals {
		if a.UserID == userID {
			if a.PreviousFirstName != nil {
				t.Errorf("expected previousFirstName nil (no history), got %v", *a.PreviousFirstName)
			}
			if a.PreviousLastName != nil {
				t.Errorf("expected previousLastName nil (no history), got %v", *a.PreviousLastName)
			}
		}
	}
}

func TestGetPendingApprovals_Empty(t *testing.T) {
	t.Parallel()
	ctx, _ := testutils.SetupTestTx(t)

	req := httptest.NewRequest(http.MethodGet, "/api/admin/today/pending-approvals", nil)
	req = req.WithContext(ctx)
	rr := httptest.NewRecorder()
	GetPendingApprovalsHandler(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
	}

	var resp PendingApprovalsResponse
	if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal: %v", err)
	}

	if resp.Approvals == nil {
		t.Error("expected empty array, got nil")
	}
}

func TestGetCurrentNext_ShowsPreviousNameInAppointment(t *testing.T) {
	t.Parallel()
	ctx, tx := testutils.SetupTestTx(t)

	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}

	_, err = tx.Exec(ctx, `
		INSERT INTO name_history (user_id, previous_first_name, previous_last_name)
		VALUES ($1, 'OldFirst', 'OldLast')
	`, userID)
	if err != nil {
		t.Fatalf("failed to insert name_history: %v", err)
	}

	svcID := createTodayService(t, ctx, tx)

	// Ensure working hours for all weekdays
	for wd := 0; wd <= 6; wd++ {
		tx.Exec(ctx, `
			INSERT INTO working_hours (weekday, start_time, end_time, is_open)
			VALUES ($1, '09:00', '17:00', true)
			ON CONFLICT (weekday) DO UPDATE SET start_time = '09:00', end_time = '17:00', is_open = true
		`, wd)
	}

	var bookingID2 string
	err = tx.QueryRow(ctx, `
		INSERT INTO bookings (user_id, start_time, status)
		VALUES ($1, NOW(), 'confirmed')
		RETURNING id
	`, userID).Scan(&bookingID2)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}
	addBookingService(t, ctx, tx, bookingID2, svcID)

	req := httptest.NewRequest(http.MethodGet, "/api/admin/today/current-next", nil)
	req = req.WithContext(ctx)
	rr := httptest.NewRecorder()
	GetCurrentAndNextHandler(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
	}

	var resp CurrentNextResponse
	if err := json.Unmarshal(rr.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal: %v", err)
	}

	if resp.Current == nil {
		t.Fatal("expected current appointment, got nil")
	}
	if resp.Current.User == nil {
		t.Fatal("expected user info on current appointment")
	}
	if resp.Current.User.PreviousFirstName == nil || *resp.Current.User.PreviousFirstName != "OldFirst" {
		t.Errorf("expected previousFirstName 'OldFirst', got %v", resp.Current.User.PreviousFirstName)
	}
	if resp.Current.User.PreviousLastName == nil || *resp.Current.User.PreviousLastName != "OldLast" {
		t.Errorf("expected previousLastName 'OldLast', got %v", resp.Current.User.PreviousLastName)
	}
}