<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Timetable;
use Carbon\Carbon;

class AdminTimetableController extends Controller
{
    public function index()
    {
        if (!session()->has('admin_id')) {
            return redirect()->route('admin.login')->with('error', 'Please login first.');
        }

        // DB එකේ තියෙන ඔක්කොම Timetable entries ගන්නවා
        $allTimetables = Timetable::all();

        // ඊට පස්සේ Time Slot එකයි Day එකයි අනුව Map කරගන්නවා
        $grid = [];
        foreach ($allTimetables as $item) {
            $grid[$item->time_slot][$item->day] = $item;
        }

        $days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday'];
        
        $timeSlots = [
            '08:30 - 10:00',
            '10:45 - 12:15',
            '12:15 - 01:00', // Lunch / Interval
            '01:00 - 03:00'
        ];

        // Today's Day Name
        $today = Carbon::now()->format('l'); 
        $todaySchedule = Timetable::where('day', $today)->get();

        return view('admin.admintimetable', compact('allTimetables', 'days', 'timeSlots', 'grid', 'todaySchedule', 'today'));
    }

    // Save or Update Entry
    public function store(Request $request)
    {
        $request->validate([
            'time_slot'    => 'required|string',
            'day'          => 'required|string',
            'subject_name' => 'required|string|max:255',
            'type'         => 'required|string',
        ]);

        // අදාළ Day එකටයි Time Slot එකටයි කලින් Data තිබුණොත් Update කරනවා, නැත්නම් අලුතෙන් Add කරනවා
        Timetable::updateOrCreate(
            [
                'day'       => $request->day,
                'time_slot' => $request->time_slot,
            ],
            [
                'subject_name'   => $request->subject_name,
                'type'           => $request->type,
                'student_log_id' => $request->student_log_id,
            ]
        );

        return redirect()->back()->with('success', 'Timetable updated successfully!');
    }

    // Delete Single Slot
    public function destroy($id)
    {
        $timetable = Timetable::findOrFail($id);
        $timetable->delete();

        return redirect()->back()->with('success', 'Timetable slot cleared successfully!');
    }
}