<?php

namespace App\Http\Controllers;

use App\Models\ReportingCycle;
use App\Models\Submission;
use App\Models\SubmissionResult;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class ReportController extends Controller
{
    public function index(Request $request)
    {
        abort_unless(auth()->user()->can('laporan.lihat'), 403);

        $cycles = ReportingCycle::orderByDesc('renewal_year')->get();
        $cycleId = $request->input('cycle');

        $resultsQuery = SubmissionResult::query()
            ->join('submissions', 'submissions.id', '=', 'submission_results.submission_id')
            ->join('data_centres', 'data_centres.id', '=', 'submissions.data_centre_id')
            ->join('reporting_cycles', 'reporting_cycles.id', '=', 'submissions.reporting_cycle_id')
            ->whereNull('submissions.deleted_at');

        if ($cycleId) {
            $resultsQuery->where('submissions.reporting_cycle_id', $cycleId);
        }

        // Jadual hasil karbon mengikut pusat data + kitaran.
        $rows = (clone $resultsQuery)
            ->select(
                'data_centres.nama_pusat_data',
                'reporting_cycles.reporting_year',
                'submission_results.result_token',
                'submission_results.value'
            )
            ->orderBy('reporting_cycles.reporting_year')
            ->orderBy('data_centres.nama_pusat_data')
            ->get()
            ->groupBy(fn ($r) => $r->nama_pusat_data.'|'.$r->reporting_year);

        // Trend jumlah karbon (A) mengikut tahun pelaporan.
        $trend = (clone $resultsQuery)
            ->where('submission_results.result_token', 'A')
            ->select('reporting_cycles.reporting_year', DB::raw('SUM(submission_results.value) as jumlah'))
            ->groupBy('reporting_cycles.reporting_year')
            ->orderBy('reporting_cycles.reporting_year')
            ->pluck('jumlah', 'reporting_year');

        // Pecahan status serahan.
        $statusBreakdown = Submission::query()
            ->when($cycleId, fn ($q) => $q->where('reporting_cycle_id', $cycleId))
            ->select('status', DB::raw('count(*) as jumlah'))
            ->groupBy('status')->pluck('jumlah', 'status');

        return view('reports.index', compact('cycles', 'cycleId', 'rows', 'trend', 'statusBreakdown'));
    }
}