<?php

declare(strict_types=1);

namespace App\Controllers;

use App\Core\Access;
use App\Core\Controller;
use App\Core\Csrf;
use App\Models\AgentModel;
use App\Models\MotifModel;
use App\Models\StructureModel;
use DateTimeImmutable;
use DateTimeZone;
use PDO;

final class PageController extends Controller
{
    private Access $access;

    public function __construct(private PDO $pdo)
    {
        $this->access = new Access($pdo);
    }

    public function planning(): void
    {
        $this->access->requirePage('planning');
        $forcedStructure = $this->access->editableStructureId();
        $permissions = $this->access->permissions();
        $scripts = ['planning-editor.js'];
        $modules = ['planning'];
        if (!empty($permissions['can_use_templates'])) {
            $scripts[] = 'week-templates.js';
            $modules[] = 'weekTemplates';
        }
        $this->renderPage('planning', 'Saisie du planning', 'planning', [
            'structures' => $this->loadStructures(),
            'motifs' => $this->loadMotifs(),
            'currentWeek' => $this->currentWeek(),
            'scripts' => $scripts,
            'modules' => $modules,
            'pageConfig' => [
                'structureId' => $forcedStructure ?: $this->positiveInt($_GET['structure_id'] ?? null),
                'agentId' => $this->positiveInt($_GET['agent_id'] ?? null),
                'week' => $this->weekValue($_GET['week'] ?? null),
                'focus' => (string) ($_GET['focus'] ?? ''),
                'notice' => trim((string) ($_GET['notice'] ?? '')),
                'structureLocked' => $forcedStructure !== null,
            ],
        ]);
    }

    public function pending(): void
    {
        $this->access->requirePage('pending');
        $this->renderPage('pending', 'Plannings à valider', 'pending', [
            'scripts' => ['pending-validation.js'],
            'modules' => ['pendingValidation'],
        ]);
    }

    public function coverage(): void
    {
        $this->access->requirePage('coverage');
        $forcedStructure = $this->access->role() === Access::ROLE_RESPONSABLE ? $this->access->structureId() : null;
        $this->renderPage('coverage', 'Contrôle de couverture', 'coverage', [
            'structures' => $this->loadStructures(),
            'currentWeek' => $this->weekValue($_GET['week'] ?? null) ?: $this->currentWeek(),
            'scripts' => ['coverage.js'],
            'modules' => ['coverage'],
            'pageConfig' => [
                'structureId' => $forcedStructure ?: $this->positiveInt($_GET['structure_id'] ?? null),
                'structureLocked' => $forcedStructure !== null,
            ],
        ]);
    }

    public function structures(): void
    {
        $this->access->requirePage('structures');
        $forcedStructure = $this->access->role() !== Access::ROLE_SERVICE ? $this->access->structureId() : null;
        $this->renderPage('structures', 'Planning par lieu', 'structures', [
            'structures' => $this->loadStructures(),
            'currentWeek' => $this->weekValue($_GET['week'] ?? null) ?: $this->currentWeek(),
            'scripts' => ['structure-overview.js'],
            'modules' => ['structureOverview'],
            'pageConfig' => [
                'structureId' => $forcedStructure ?: $this->positiveInt($_GET['structure_id'] ?? null),
                'structureLocked' => $forcedStructure !== null,
            ],
        ]);
    }

    public function agents(): void
    {
        $this->access->requirePage('agents');
        $forcedAgent = $this->access->role() === Access::ROLE_AGENT ? $this->access->agentId() : null;
        $this->renderPage('agents', $forcedAgent ? 'Mon planning' : 'Planning par agent', 'agents', [
            'agents' => $this->loadAgents(),
            'structures' => $this->loadStructuresForAgentEditor(),
            'motifs' => $this->loadMotifs(),
            'scripts' => ['agent-overview.js'],
            'modules' => ['agentOverview'],
            'pageConfig' => [
                'agentId' => $forcedAgent ?: $this->positiveInt($_GET['agent_id'] ?? null),
                'month' => $this->monthValue($_GET['month'] ?? null),
                'agentLocked' => $forcedAgent !== null,
            ],
        ]);
    }

    public function annual(): void
    {
        $this->access->requirePage('annual');
        $this->renderPage('annual', 'Vue annuelle du PTA', 'annual', [
            'agents' => (new AgentModel($this->pdo))->allActive(),
            'scripts' => ['annual-overview.js'],
            'modules' => ['annualOverview'],
            'pageConfig' => [
                'agentId' => $this->positiveInt($_GET['agent_id'] ?? null),
                'year' => $this->yearValue($_GET['year'] ?? null),
            ],
        ]);
    }

    public function pta(): void
    {
        $this->access->requirePage('pta');
        $this->renderPage('pta', 'PTA annuel par agent', 'pta', [
            'agents' => (new AgentModel($this->pdo))->allActive(),
            'structures' => (new StructureModel($this->pdo))->allActive(),
            'scripts' => ['pta.js'],
            'modules' => ['pta'],
            'pageConfig' => [
                'agentId' => $this->positiveInt($_GET['agent_id'] ?? null),
                'date' => $this->dateValue($_GET['date'] ?? null),
            ],
        ]);
    }

    public function teams(): void
    {
        $this->access->requirePage('teams');
        $this->renderPage('teams', 'Équipes des mercredis et vacances', 'teams', [
            'agents' => (new AgentModel($this->pdo))->allActive(),
            'structures' => (new StructureModel($this->pdo))->allActive(),
            'scripts' => ['teams.js'],
            'modules' => ['teams'],
            'pageConfig' => [
                'dateDebut' => $this->dateValue($_GET['date_debut'] ?? null),
                'dateFin' => $this->dateValue($_GET['date_fin'] ?? null),
            ],
        ]);
    }

    public function vacations(): void
    {
        $this->access->requirePage('vacations');
        $this->renderPage('vacations', 'Vacances scolaires', 'vacations', [
            'scripts' => ['vacation-calendar.js'],
            'modules' => ['vacationCalendar'],
        ]);
    }

    public function administration(): void
    {
        $this->access->requirePage('administration');
        $this->renderPage('administration', 'Administration', 'administration', [
            'agents' => (new AgentModel($this->pdo))->allActive(),
            'structures' => (new StructureModel($this->pdo))->allActive(),
            'posts' => (new AgentModel($this->pdo))->allPosts(),
            'scripts' => ['administration.js', 'coverage.js'],
            'modules' => ['administration', 'coverage'],
        ]);
    }

    private function renderPage(string $view, string $title, string $activePage, array $data = []): void
    {
        $profile = $this->access->profile();
        $this->render('pages/' . $view, array_merge([
            'pageTitle' => $title,
            'activePage' => $activePage,
            'csrfToken' => Csrf::ensureToken(),
            'scripts' => [],
            'modules' => [],
            'motifs' => [],
            'pageConfig' => [],
            'accessProfile' => $profile,
            'permissions' => $profile['permissions'],
            'allowedPages' => $this->access->allowedPages(),
        ], $data));
    }

    private function loadStructures(): array
    {
        $model = new StructureModel($this->pdo);
        if ($this->access->role() === Access::ROLE_SERVICE) {
            return $model->allActive();
        }
        $structureId = $this->access->structureId();
        if ($structureId === null) {
            return [];
        }
        $structure = $model->findActive($structureId);
        return $structure ? [$structure] : [];
    }

    private function loadStructuresForAgentEditor(): array
    {
        if ($this->access->role() === Access::ROLE_SERVICE) {
            return (new StructureModel($this->pdo))->allActive();
        }
        return $this->loadStructures();
    }

    private function loadAgents(): array
    {
        $model = new AgentModel($this->pdo);
        if ($this->access->role() === Access::ROLE_SERVICE) {
            return $model->allActive();
        }
        if ($this->access->role() === Access::ROLE_AGENT) {
            $agent = $this->access->agentId() ? $model->findActive((int) $this->access->agentId()) : null;
            return $agent ? [$agent] : [];
        }
        $structureId = $this->access->structureId();
        return $structureId ? $model->allVisibleForStructure($structureId) : [];
    }

    private function loadMotifs(): array
    {
        return (new MotifModel($this->pdo))->allActive();
    }

    private function currentWeek(): string
    {
        return (new DateTimeImmutable('now', new DateTimeZone('Europe/Paris')))->format('o-\\WW');
    }

    private function positiveInt(mixed $value): ?int
    {
        $number = filter_var($value, FILTER_VALIDATE_INT, ['options' => ['min_range' => 1]]);
        return $number === false ? null : (int) $number;
    }

    private function weekValue(mixed $value): ?string
    {
        $value = trim((string) $value);
        return preg_match('/^\\d{4}-W\\d{2}$/', $value) === 1 ? $value : null;
    }

    private function dateValue(mixed $value): ?string
    {
        $value = trim((string) $value);
        $date = DateTimeImmutable::createFromFormat('!Y-m-d', $value);
        return $date && $date->format('Y-m-d') === $value ? $value : null;
    }

    private function yearValue(mixed $value): ?int
    {
        $number = filter_var($value, FILTER_VALIDATE_INT, ['options' => ['min_range' => 2000, 'max_range' => 2100]]);
        return $number === false ? null : (int) $number;
    }

    private function monthValue(mixed $value): ?string
    {
        $value = trim((string) $value);
        return preg_match('/^\\d{4}-(0[1-9]|1[0-2])$/', $value) === 1 ? $value : null;
    }
}