//go:build test && dev

package bookings

// Package bookings contains targeted coverage improvements for under-tested
// booking handlers and helpers.
//
// Targets:
//   - AdminCreateBookingForUserHandler: override service not in booking, custom
//     override not in booking
//   - AdminRejectEditRequestHandler: invalid request ID edge case
//   - GetOverlappingBookingsHandler: no overlaps, non-existent booking, invalid ID
//   - calculateServiceDurationWithOverrides: direct unit tests

import (
	"context"
	"net/http"
	"testing"
	"time"

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

// =============================================================================
// AdminCreateBookingForUserHandler — additional coverage
// =============================================================================

// TestAdminCreateBookingForUserHandler_OverrideServiceNotInBooking verifies
// that providing an override for a regular service that was NOT added to the
// booking returns 400 Bad Request.
func TestAdminCreateBookingForUserHandler_OverrideServiceNotInBooking(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	adminID, err := fixtures.CreateTestAdminUser(tx)
	if err != nil {
		t.Fatalf("failed to create admin: %v", err)
	}
	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}
	_, err = tx.Exec(ctx, "UPDATE users SET deposits_required = 0 WHERE id = $1", userID)
	if err != nil {
		t.Fatalf("failed to set deposits_required: %v", err)
	}
	serviceA, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service A: %v", err)
	}
	serviceB, err := fixtures.CreateTestService(tx)
	if err != nil {
		t.Fatalf("failed to create service B: %v", err)
	}

	overridePrice := 75.0
	body := AdminCreateBookingForUserRequest{
		UserID:     userID,
		StartTime:  weekdayTime(time.Wednesday, 10),
		ServiceIDs: []string{serviceA},
		// Override references serviceB which is NOT in ServiceIDs
		ServiceOverrides: []ServiceOverride{
			{ServiceID: serviceB, OverridePrice: &overridePrice},
		},
	}

	w := serveChiHandler(AdminCreateBookingForUserHandler, "POST", "/", "/", body,
		func(baseCtx context.Context) context.Context {
			baseCtx = context.WithValue(baseCtx, mw.UserRoleKey, "admin")
			baseCtx = context.WithValue(baseCtx, mw.UserIDKey, adminID)
			return db.ContextWithTx(baseCtx, db.TxFromContext(ctx))
		})

	if w.Code != http.StatusBadRequest {
		t.Errorf("expected 400 for override not in booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

// TestAdminCreateBookingForUserHandler_CustomOverrideNotInBooking verifies that
// providing an override for a custom service not in the booking returns 400.
func TestAdminCreateBookingForUserHandler_CustomOverrideNotInBooking(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	adminID, err := fixtures.CreateTestAdminUser(tx)
	if err != nil {
		t.Fatalf("failed to create admin: %v", err)
	}
	userID, err := fixtures.CreateTestUser(tx)
	if err != nil {
		t.Fatalf("failed to create user: %v", err)
	}
	_, err = tx.Exec(ctx, "UPDATE users SET deposits_required = 0 WHERE id = $1", userID)
	if err != nil {
		t.Fatalf("failed to set deposits_required: %v", err)
	}

	// Insert a custom service
	var customSvcID string
	err = tx.QueryRow(ctx, `
		INSERT INTO custom_services (name, description, price, duration_minutes)
		VALUES ($1, $2, $3, $4)
		RETURNING id
	`, "Test Custom", "Custom service", 60.00, 45).Scan(&customSvcID)
	if err != nil {
		t.Fatalf("failed to create custom service: %v", err)
	}

	// Another custom service that is NOT included in the booking
	var otherCustomSvcID string
	err = tx.QueryRow(ctx, `
		INSERT INTO custom_services (name, description, price, duration_minutes)
		VALUES ($1, $2, $3, $4)
		RETURNING id
	`, "Other Custom", "Not in booking", 40.00, 30).Scan(&otherCustomSvcID)
	if err != nil {
		t.Fatalf("failed to create other custom service: %v", err)
	}

	overridePrice := 50.0
	body := AdminCreateBookingForUserRequest{
		UserID:           userID,
		StartTime:        weekdayTime(time.Wednesday, 10),
		CustomServiceIDs: []string{customSvcID},
		// Override references otherCustomSvcID which is NOT in CustomServiceIDs
		CustomOverrides: []ServiceOverride{
			{ServiceID: otherCustomSvcID, OverridePrice: &overridePrice},
		},
	}

	w := serveChiHandler(AdminCreateBookingForUserHandler, "POST", "/", "/", body,
		func(baseCtx context.Context) context.Context {
			baseCtx = context.WithValue(baseCtx, mw.UserRoleKey, "admin")
			baseCtx = context.WithValue(baseCtx, mw.UserIDKey, adminID)
			return db.ContextWithTx(baseCtx, db.TxFromContext(ctx))
		})

	if w.Code != http.StatusBadRequest {
		t.Errorf("expected 400 for custom override not in booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

// =============================================================================
// AdminRejectEditRequestHandler — additional coverage
// =============================================================================

// TestAdminRejectEditRequestHandler_InvalidRequestID verifies that rejecting
// an edit request with an invalid (non-hex) request ID returns 404.
func TestAdminRejectEditRequestHandler_InvalidRequestID(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	adminID, err := fixtures.CreateTestAdminUser(tx)
	if err != nil {
		t.Fatalf("failed to create admin: %v", err)
	}

	// Route: /api/admin/bookings/{id}/edit-requests/{request_id}/deny
	// Use a booking ID that passes IsValidID but a request_id that does not
	bookingID := "aaaaaaaaaaaa" // valid 12-char hex
	invalidRequestID := "not-a-valid-id"

	w := serveChiHandler(AdminRejectEditRequestHandler, "POST",
		"/api/admin/bookings/"+bookingID+"/edit-requests/"+invalidRequestID+"/deny",
		"/api/admin/bookings/{id}/edit-requests/{request_id}/deny", nil,
		func(baseCtx context.Context) context.Context {
			baseCtx = context.WithValue(baseCtx, mw.UserRoleKey, "admin")
			baseCtx = context.WithValue(baseCtx, mw.UserIDKey, adminID)
			return db.ContextWithTx(baseCtx, db.TxFromContext(ctx))
		})

	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for invalid request ID, got %d. body: %s", w.Code, w.Body.String())
	}
}

// =============================================================================
// GetOverlappingBookingsHandler — additional coverage
// =============================================================================

// TestAdminGetOverlappingBookingsHandler_NoOverlaps verifies that when a booking
// has no overlapping bookings, an empty list is returned.
func TestAdminGetOverlappingBookingsHandler_NoOverlaps(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

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

	// Create a single confirmed booking with no other bookings near it
	baseTime := weekdayTime(time.Wednesday, 10)
	bookingID, err := fixtures.CreateTestBookingAtTime(tx, userID, serviceID, baseTime)
	if err != nil {
		t.Fatalf("failed to create booking: %v", err)
	}
	_, err = tx.Exec(ctx, "UPDATE bookings SET status = 'confirmed' WHERE id = $1", bookingID)
	if err != nil {
		t.Fatalf("failed to confirm booking: %v", err)
	}

	// Query overlapping for the booking — there are no other bookings
	w := serveChiHandler(GetOverlappingBookingsHandler, "GET",
		"/"+bookingID+"/overlapping", "/{id}/overlapping", nil,
		adminCtx(adminID, ctx), ctx)

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

	var resp OverlappingBookingsResponse
	if err := parseResponseBody(w, &resp); err != nil {
		t.Fatalf("failed to parse response: %v", err)
	}
	if len(resp.Bookings) != 0 {
		t.Errorf("expected 0 overlapping bookings, got %d", len(resp.Bookings))
	}
}

// TestAdminGetOverlappingBookingsHandler_NonExistentBooking verifies that
// querying overlapping bookings for a non-existent booking returns 404.
func TestAdminGetOverlappingBookingsHandler_NonExistentBooking(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	adminID, err := fixtures.CreateTestAdminUser(tx)
	if err != nil {
		t.Fatalf("failed to create admin: %v", err)
	}

	// Use a valid 12-char hex ID that does not exist in the DB
	nonExistentID := "aaaaaaaaaaaa"

	w := serveChiHandler(GetOverlappingBookingsHandler, "GET",
		"/"+nonExistentID+"/overlapping", "/{id}/overlapping", nil,
		adminCtx(adminID, ctx), ctx)

	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for non-existent booking, got %d. body: %s", w.Code, w.Body.String())
	}
}

// TestAdminGetOverlappingBookingsHandler_InvalidBookingID verifies that
// querying overlapping bookings with an invalid (non-hex) booking ID returns 404.
func TestAdminGetOverlappingBookingsHandler_InvalidBookingID(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	adminID, err := fixtures.CreateTestAdminUser(tx)
	if err != nil {
		t.Fatalf("failed to create admin: %v", err)
	}

	// Use an invalid ID that fails IsValidID
	invalidID := "not-valid"

	w := serveChiHandler(GetOverlappingBookingsHandler, "GET",
		"/"+invalidID+"/overlapping", "/{id}/overlapping", nil,
		adminCtx(adminID, ctx), ctx)

	if w.Code != http.StatusNotFound {
		t.Errorf("expected 404 for invalid booking ID, got %d. body: %s", w.Code, w.Body.String())
	}
}

// =============================================================================
// calculateServiceDurationWithOverrides — direct unit tests
// =============================================================================

// TestCalculateServiceDurationWithOverrides_Normal verifies that the total
// duration is the sum of all service durations when no overrides are provided.
func TestCalculateServiceDurationWithOverrides_Normal(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	svc1, err := fixtures.CreateTestServiceWithDuration(tx, 60)
	if err != nil {
		t.Fatalf("failed to create service 1: %v", err)
	}
	svc2, err := fixtures.CreateTestServiceWithDuration(tx, 30)
	if err != nil {
		t.Fatalf("failed to create service 2: %v", err)
	}

	// Create a context with the tx so db.Conn routes through it
	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{svc1, svc2}, nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if dur != 90 {
		t.Errorf("expected duration 90 (60+30), got %d", dur)
	}
}

// TestCalculateServiceDurationWithOverrides_WithOverride verifies that when an
// override duration is provided for a regular service, the override is used
// instead of the service's default duration.
func TestCalculateServiceDurationWithOverrides_WithOverride(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	svc1, err := fixtures.CreateTestServiceWithDuration(tx, 60)
	if err != nil {
		t.Fatalf("failed to create service 1: %v", err)
	}
	svc2, err := fixtures.CreateTestServiceWithDuration(tx, 30)
	if err != nil {
		t.Fatalf("failed to create service 2: %v", err)
	}

	overrideDur := 45
	overrides := []ServiceOverrideRequest{
		{ServiceID: svc1, OverrideDurationMinutes: &overrideDur},
	}

	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{svc1, svc2}, overrides)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	// svc1 overridden to 45, svc2 stays at 30 => total 75
	if dur != 75 {
		t.Errorf("expected duration 75 (45+30), got %d", dur)
	}
}

// TestCalculateServiceDurationWithOverrides_CustomService verifies that custom
// services are included in the duration calculation and overrides work for them.
func TestCalculateServiceDurationWithOverrides_CustomService(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	svcID, err := fixtures.CreateTestServiceWithDuration(tx, 60)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	// Create a custom service directly
	var customSvcID string
	err = tx.QueryRow(ctx, `
		INSERT INTO custom_services (name, description, price, duration_minutes)
		VALUES ($1, $2, $3, $4)
		RETURNING id
	`, "Test Custom Svc", "Custom for duration test", 50.00, 45).Scan(&customSvcID)
	if err != nil {
		t.Fatalf("failed to create custom service: %v", err)
	}

	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{svcID, customSvcID}, nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	// svc: 60, custom: 45 => total 105
	if dur != 105 {
		t.Errorf("expected duration 105 (60+45), got %d", dur)
	}

	// Now test with override on the custom service
	overrideDur := 30
	overrides := []ServiceOverrideRequest{
		{ServiceID: customSvcID, OverrideDurationMinutes: &overrideDur},
	}

	dur, err = calculateServiceDurationWithOverrides(txCtx, []string{svcID, customSvcID}, overrides)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	// svc: 60, custom overridden to 30 => total 90
	if dur != 90 {
		t.Errorf("expected duration 90 (60+30), got %d", dur)
	}
}

// TestCalculateServiceDurationWithOverrides_MixedOverrides verifies that when
// some services have overrides and others don't, the correct total is computed.
func TestCalculateServiceDurationWithOverrides_MixedOverrides(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	svc1, err := fixtures.CreateTestServiceWithDuration(tx, 60)
	if err != nil {
		t.Fatalf("failed to create service 1: %v", err)
	}
	svc2, err := fixtures.CreateTestServiceWithDuration(tx, 30)
	if err != nil {
		t.Fatalf("failed to create service 2: %v", err)
	}
	svc3, err := fixtures.CreateTestServiceWithDuration(tx, 90)
	if err != nil {
		t.Fatalf("failed to create service 3: %v", err)
	}

	// Override svc1 to 45 and svc3 to 60; svc2 stays at 30
	override1 := 45
	override3 := 60
	overrides := []ServiceOverrideRequest{
		{ServiceID: svc1, OverrideDurationMinutes: &override1},
		{ServiceID: svc3, OverrideDurationMinutes: &override3},
	}

	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{svc1, svc2, svc3}, overrides)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	// svc1: 45, svc2: 30, svc3: 60 => total 135
	if dur != 135 {
		t.Errorf("expected duration 135 (45+30+60), got %d", dur)
	}
}

// TestCalculateServiceDurationWithOverrides_SingleService verifies that a single
// service with no overrides returns its own duration.
func TestCalculateServiceDurationWithOverrides_SingleService(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	svcID, err := fixtures.CreateTestServiceWithDuration(tx, 45)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{svcID}, nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if dur != 45 {
		t.Errorf("expected duration 45, got %d", dur)
	}
}

// TestCalculateServiceDurationWithOverrides_EmptyServices verifies that an
// empty service list returns 0 duration.
func TestCalculateServiceDurationWithOverrides_EmptyServices(t *testing.T) {
	ctx, _ := testutils.SetupTestTx(t)

	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{}, nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if dur != 0 {
		t.Errorf("expected duration 0 for empty services, got %d", dur)
	}
}

// TestCalculateServiceDurationWithOverrides_NilOverrides verifies that nil
// overrides (when len(overrides)==0) goes through the sum path correctly.
func TestCalculateServiceDurationWithOverrides_NilOverrides(t *testing.T) {
	ctx, tx := testutils.SetupTestTx(t)

	svcID, err := fixtures.CreateTestServiceWithDuration(tx, 60)
	if err != nil {
		t.Fatalf("failed to create service: %v", err)
	}

	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	// Pass nil overrides explicitly
	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{svcID}, nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if dur != 60 {
		t.Errorf("expected duration 60, got %d", dur)
	}
}

// TestCalculateServiceDurationWithOverrides_NonExistentService verifies that
// passing a non-existent service ID returns 0 duration (the SUM will be over
// empty rows).
func TestCalculateServiceDurationWithOverrides_NonExistentService(t *testing.T) {
	ctx, _ := testutils.SetupTestTx(t)

	txCtx := db.ContextWithTx(context.Background(), db.TxFromContext(ctx))

	// A valid hex ID that doesn't exist as a service or custom service
	dur, err := calculateServiceDurationWithOverrides(txCtx, []string{"aaaaaaaaaaaa"}, nil)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if dur != 0 {
		t.Errorf("expected duration 0 for non-existent service, got %d", dur)
	}
}