<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use App\Models\User;
use App\Models\AttendanceRecord;
use Illuminate\Support\Facades\DB;
use Carbon\Carbon;

class SyncLegacyDailyShifts extends Command
{
    protected $signature = 'import:legacy-shifts {start_date?} {end_date?}';
    protected $description = 'Sweeps legacy employee_daily_shifts to synchronize proper working/rest day tracking into the core attendance engine natively.';

    public function handle()
    {
        $startDate = $this->argument('start_date') ?: '2026-01-11';
        $endDate = $this->argument('end_date') ?: '2026-01-25';

        $this->info("Initializing Legacy Shift Matrix Sync: $startDate to $endDate");

        $employees = User::where('type', 'employee')->whereHas('employee')->get();
        $bar = $this->output->createProgressBar(count($employees));

        $legacyUsers = DB::connection('legacy')->table('users')->get(['id', 'name']);
        
        $newUserIdMap = [];
        foreach ($legacyUsers as $lu) {
            $matchingLocal = User::where('name', $lu->name)->first();
            if ($matchingLocal) {
                // Key = local user ID, Value = legacy user ID
                $newUserIdMap[$matchingLocal->id] = $lu->id;
            }
        }

        foreach ($employees as $user) {
            if (!isset($newUserIdMap[$user->id])) {
                $bar->advance();
                continue;
            }
            
            $legacyUserId = $newUserIdMap[$user->id];

            $currentDate = Carbon::parse($startDate);
            $periodEndObj = Carbon::parse($endDate);

            while ($currentDate->lte($periodEndObj)) {
                $dateString = $currentDate->toDateString();

                // 1. Fetch the master schedule template from the old legacy DB
                $shiftRecord = DB::connection('legacy')
                    ->table('employee_daily_shifts')
                    ->where('user_id', $legacyUserId)
                    ->where('date', $dateString)
                    ->first();

                // If shift_id is physically blank/null, they are totally OFF.
                $isRestDay = (!$shiftRecord || empty($shiftRecord->shift_id));

                if ($isRestDay) {
                    // Update or Force-create an explicit RD token in our local Database
                    AttendanceRecord::updateOrCreate(
                        [
                            'employee_id' => $user->id,
                            'date' => $dateString
                        ],
                        [
                            'is_rest_day' => true,
                            'is_absent' => false,
                            'status' => 'present', // Bypass penalty
                            'created_by' => 1
                        ]
                    );
                }

                $currentDate->addDay();
            }

            $bar->advance();
        }

        $bar->finish();
        $this->info("\nMatrix Sync Complete. Physical Rest Days locked locally.");
    }
}