<?php

declare(strict_types=1);

namespace App\Services;

use DateTimeImmutable;
use DateTimeZone;

/**
 * Génère un bilan annuel synthétique du temps d'un agent, ventilé par motif.
 */
final class AgentTimeSummaryPdfService
{
    private const PAGE_WIDTH = 595.28;
    private const PAGE_HEIGHT = 841.89;
    private const MARGIN = 42.0;

    public function annualSummary(array $agent, array $quota, array $rows): string
    {
        $pdf = new SimplePdf(self::PAGE_WIDTH, self::PAGE_HEIGHT);
        $periodLabel = (string) ($quota['periode_libelle'] ?? ('année ' . ($quota['annee'] ?? date('Y'))));
        $generatedAt = new DateTimeImmutable('now', new DateTimeZone('Europe/Paris'));
        $totals = $this->normalizeTotals($rows);

        $this->drawHeader($pdf, $agent, $periodLabel, $generatedAt);
        $this->drawIdentity($pdf, $agent);
        $this->drawBreakdown($pdf, $totals);
        $this->drawResult($pdf, $quota, $totals);
        $this->drawFooter($pdf, $agent, $generatedAt);

        return $pdf->output();
    }

    private function drawHeader(SimplePdf $pdf, array $agent, string $periodLabel, DateTimeImmutable $generatedAt): void
    {
        $pdf->text(self::MARGIN, 34, 'PTA', 10, true);
        $pdf->text(self::MARGIN, 58, 'Compte-rendu du temps de l\'agent', 17, true);
        $pdf->text(self::MARGIN, 79, 'Synthèse des heures planifiées et décomptées pour la période ' . $periodLabel, 9.5);
        $pdf->text(self::PAGE_WIDTH - 190, 34, 'Édité le ' . $generatedAt->format('d/m/Y'), 8);
        $pdf->line(self::MARGIN, 94, self::PAGE_WIDTH - self::MARGIN, 94, 0.72);
    }

    private function drawIdentity(SimplePdf $pdf, array $agent): void
    {
        $x = self::MARGIN;
        $y = 118.0;
        $w = self::PAGE_WIDTH - (self::MARGIN * 2);
        $h = 90.0;

        $pdf->fillRect($x, $y, $w, 28, 0.93);
        $pdf->rect($x, $y, $w, $h, 0.68);
        $pdf->text($x + 12, $y + 19, 'Agent', 10.5, true);
        $pdf->text($x + 12, $y + 50, 'Nom : ' . (($agent['nom'] ?? '') ?: '-'), 9.2);
        $pdf->text($x + 270, $y + 50, 'Prénom : ' . (($agent['prenom'] ?? '') ?: '-'), 9.2);
        $pdf->text($x + 12, $y + 73, 'Matricule : ' . (($agent['matricule'] ?? '') ?: '-'), 9.2);
        $pdf->text($x + 270, $y + 73, 'Lieu principal : ' . (($agent['structure_principale_nom'] ?? '') ?: 'Non renseigné'), 9.2);
    }

    private function drawBreakdown(SimplePdf $pdf, array $totals): void
    {
        $x = self::MARGIN;
        $y = 232.0;
        $w = self::PAGE_WIDTH - (self::MARGIN * 2);
        $headerH = 31.0;
        $rowH = 43.0;

        $rows = [
            ['TRAVAIL', 'Heures travaillées', $totals['TRAVAIL']],
            ['MALADIE', 'Absence', $totals['MALADIE']],
            ['FORMATION', 'Formation', $totals['FORMATION']],
            ['CONGE', 'Congé', $totals['CONGE']],
            ['AUTRE', 'Absence (non décomptée)', $totals['AUTRE']],
        ];

        $pdf->fillRect($x, $y, $w, $headerH, 0.92);
        $pdf->rect($x, $y, $w, $headerH + (count($rows) * $rowH), 0.65);
        $pdf->text($x + 12, $y + 21, 'Répartition du temps', 11, true);

        $cursorY = $y + $headerH;
        foreach ($rows as [$code, $label, $minutes]) {
            $palette = $this->palette($code);
            $pdf->line($x, $cursorY, $x + $w, $cursorY, 0.83);
            $pdf->fillRectColor($x + 10, $cursorY + 11, 10, 20, $palette['accent']);
            $pdf->text($x + 32, $cursorY + 25, $label, 9.4, true);
            $pdf->text($x + $w - 130, $cursorY + 25, $this->minutesLabel($minutes), 10, true);
            $cursorY += $rowH;
        }
    }

    private function drawResult(SimplePdf $pdf, array $quota, array $totals): void
    {
        $counted = $totals['TRAVAIL'] + $totals['MALADIE'] + $totals['FORMATION'] + $totals['CONGE'] + $totals['OTHER_COUNTED'];
        $target = (int) ($quota['quota_cible_minutes'] ?? 0);
        $remaining = $target - $counted;
        $validated = (int) ($quota['minutes_valides'] ?? 0);
        $draft = (int) ($quota['minutes_brouillon'] ?? 0);

        $x = self::MARGIN;
        $y = 507.0;
        $w = self::PAGE_WIDTH - (self::MARGIN * 2);

        $pdf->line($x, $y, $x + $w, $y, 0.55);
        $pdf->text($x, $y + 32, 'Résultat - heures décomptées', 12, true);
        $pdf->text($x + $w - 150, $y + 32, $this->minutesLabel($counted), 13, true);
        $pdf->text($x, $y + 55, sprintf('Dont %s validées et %s en brouillon.', $this->minutesLabel($validated), $this->minutesLabel($draft)), 8.5);

        $boxY = $y + 82;
        $boxH = 126.0;
        $pdf->fillRect($x, $boxY, $w, $boxH, 0.965);
        $pdf->rect($x, $boxY, $w, $boxH, 0.65);
        $pdf->text($x + 14, $boxY + 27, 'Quota à effectuer sur la période', 10, true);
        $pdf->text($x + $w - 160, $boxY + 27, $this->minutesLabel($target), 11, true);
        $pdf->line($x + 12, $boxY + 43, $x + $w - 12, $boxY + 43, 0.85);
        $pdf->text($x + 14, $boxY + 72, 'Heures décomptées à ce jour', 10, true);
        $pdf->text($x + $w - 160, $boxY + 72, $this->minutesLabel($counted), 11, true);
        $pdf->line($x + 12, $boxY + 88, $x + $w - 12, $boxY + 88, 0.85);
        $pdf->text($x + 14, $boxY + 114, $remaining >= 0 ? 'Heures restant à effectuer' : 'Dépassement du quota', 10.5, true);
        $pdf->textColor($x + $w - 160, $boxY + 114, $this->minutesLabel(abs($remaining)), $remaining >= 0 ? '#1D4ED8' : '#B91C1C', 12, true);

        $noteY = $boxY + $boxH + 27;
        foreach ($pdf->wrap('Le résultat ci-dessus additionne uniquement les motifs qui décomptent le quota annuel. Les absences non décomptées apparaissent dans le détail mais ne réduisent pas le nombre d’heures restant à effectuer.', $w, 8.5) as $line) {
            $pdf->text($x, $noteY, $line, 8.5);
            $noteY += 12;
        }
    }

    private function drawFooter(SimplePdf $pdf, array $agent, DateTimeImmutable $generatedAt): void
    {
        $pdf->text(
            self::MARGIN,
            812,
            sprintf('Document généré par PTA le %s - Référence agent : %s', $generatedAt->format('d/m/Y H:i'), (string) ($agent['matricule'] ?? '-')),
            7
        );
    }

    private function normalizeTotals(array $rows): array
    {
        $totals = [
            'TRAVAIL' => 0,
            'MALADIE' => 0,
            'FORMATION' => 0,
            'CONGE' => 0,
            'AUTRE' => 0,
            'OTHER_COUNTED' => 0,
        ];

        foreach ($rows as $row) {
            $code = strtoupper((string) ($row['motif_code'] ?? 'AUTRE'));
            $minutes = (int) ($row['minutes_total'] ?? 0);
            if (array_key_exists($code, $totals) && $code !== 'OTHER_COUNTED') {
                $totals[$code] += $minutes;
                continue;
            }
            if ((int) ($row['compte_dans_quota'] ?? 0) === 1) {
                $totals['OTHER_COUNTED'] += $minutes;
            } else {
                $totals['AUTRE'] += $minutes;
            }
        }

        return $totals;
    }

    /** @return array{accent:string} */
    private function palette(string $code): array
    {
        return match (strtoupper($code)) {
            'TRAVAIL' => ['accent' => '#2563EB'],
            'FORMATION' => ['accent' => '#7C3AED'],
            'CONGE' => ['accent' => '#059669'],
            'MALADIE' => ['accent' => '#DC2626'],
            default => ['accent' => '#64748B'],
        };
    }

    private function minutesLabel(int $minutes): string
    {
        $sign = $minutes < 0 ? '-' : '';
        $absolute = abs($minutes);
        return sprintf('%s%d h %02d', $sign, intdiv($absolute, 60), $absolute % 60);
    }
}