# 🇮🇪 Irish Localization Implementation Complete

## Overview

Successfully implemented Irish localization for the table tennis booking app, with Monday as the first day of the week and Irish (en-IE) date formatting throughout.

## Key Changes Made

### 1. Utility Functions (`lib/utils.ts`)

-   **Updated `getWeekDays()`**: Now returns Monday-Sunday order with proper JS day values
-   **Added Irish conversion functions**:
    -   `getIrishDayOfWeek()`: Converts JS getDay() (0=Sunday) to Irish standard (0=Monday)
    -   `getJavaScriptDayOfWeek()`: Converts Irish day index back to JS getDay() format
    -   `getIrishDayName()`: Gets day name using Irish week start
-   **Updated `formatDate()`**: Changed from 'en-US' to 'en-IE' locale

### 2. Admin Time Slot Management (`components/admin/AdminTimeSlotManagement.tsx`)

-   **Irish week order**: Days now display Monday through Sunday
-   **Updated constants**: `IRISH_DAY_ORDER = [1, 2, 3, 4, 5, 6, 0]` for correct mapping
-   **Form defaults**: New time slots default to Monday (dayOfWeek: 1)
-   **Display logic**: Correctly maps JS day values to Irish display order
-   **Dropdown options**: Time slot creation shows days in Irish order

### 3. Calendar UI Component (`components/ui/calendar.tsx`)

-   **Added `weekStartsOn={1}`**: Calendar widget now starts with Monday
-   **Updated locale**: Changed month formatting to 'en-IE'
-   **Data attributes**: Updated to use Irish locale for consistency

### 4. Enhanced Booking Calendar (`components/booking/enhanced-booking-calendar.tsx`)

-   **Date formatting**: All `toLocaleDateString()` calls updated to 'en-IE'
-   **Consistent display**: Weekday abbreviations and full date formats use Irish locale
-   **Time slot logic**: Maintains compatibility with JS day values in database

### 5. All Other Components

Updated locale formatting in:

-   `components/dashboard/BookingCalendar.tsx`
-   `components/user/user-profile.tsx`
-   `components/notifications/announcements.tsx`
-   `components/admin/AdminUserManagement.tsx`
-   `components/admin/AdminAnnouncementManagement.tsx`
-   `components/admin/AdminCourtManagement.tsx`

### 6. API Compatibility Fix

-   **Fixed Next.js 15 async params**: Updated time-slots/[id]/route.ts to properly handle async params

## Database Compatibility

-   **No database changes needed**: Database still stores JavaScript's getDay() values (0=Sunday, 6=Saturday)
-   **Mapping handled in UI**: All conversion between JS day values and Irish display order handled in frontend
-   **Backward compatibility**: Existing time slots and bookings work seamlessly

## Technical Implementation

### Day Mapping Logic

```javascript
// JavaScript getDay() values remain in database:
// 0=Sunday, 1=Monday, 2=Tuesday, 3=Wednesday, 4=Thursday, 5=Friday, 6=Saturday

// Irish display order (Monday first):
const IRISH_DAY_ORDER = [1, 2, 3, 4, 5, 6, 0]; // Maps to Monday-Sunday

// Admin panel shows: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
// But stores as:      1,      2,       3,         4,        5,      6,        0
```

### Locale Settings

-   **Calendar**: Starts with Monday (`weekStartsOn={1}`)
-   **Date Format**: Irish format (DD/MM/YYYY pattern via en-IE)
-   **Time Format**: Maintained 24-hour format as requested
-   **Day Names**: All components use Irish week order for display

## User Impact

1. **Admin Interface**: Time slot management shows Monday first, making it intuitive for Irish users
2. **Booking Calendar**: Date selection and display follow Irish conventions
3. **Date Display**: All dates throughout the app use Irish formatting (en-IE)
4. **Week View**: Calendar widgets start with Monday as expected in Ireland

## Testing Verification

-   ✅ Created test script (`scripts/test-irish-localization.js`) to verify settings
-   ✅ Confirmed day mapping logic works correctly
-   ✅ Verified Irish date formatting across all components
-   ✅ Time slot management displays in correct order
-   ✅ Calendar widgets start with Monday

## Benefits

-   **Cultural Alignment**: Follows Irish/European convention of Monday as week start
-   **User Experience**: More intuitive for Irish users
-   **Consistency**: All date formatting uses Irish locale
-   **Maintainable**: Clean separation between database storage and display logic
-   **No Breaking Changes**: Existing bookings and time slots continue to work

## Future Considerations

-   Could extend to full internationalization (i18n) if needed for other locales
-   Day conversion utilities are ready for reuse across the application
-   Database schema remains flexible for any future locale changes