<?php

use App\Controllers\PublicController;

/**
 * Structured editing of projects for the admin console (galleries, Instagram,
 * cover). Content lives in cja_projects; the static site reads it at build
 * time, so a save is followed by a rebuild (the console's /devconsole/rebuild).
 *
 *   GET  /api/adminprojects/list             -> [{slug,title,galleryCount,...}]
 *   GET  /api/adminprojects/get?slug=...     -> full editable record
 *   POST /api/adminprojects/save             -> { slug, gallery, links, cover_image }
 *
 * All admin-gated. Only media-related fields are writable here; the freeform
 * agent console handles prose and layout.
 */
class AdminProjects extends PublicController
{
    public function list(): void
    {
        $this->requireAdmin();
        $rows = \Db::select('SELECT slug, title, status, gallery, links
                             FROM cja_projects ORDER BY sort_order ASC');
        $out = array_map(function ($r) {
            $gallery = json_decode($r['gallery'] ?? '[]', true) ?: [];
            $links = json_decode($r['links'] ?? '{}', true) ?: [];
            $filled = count(array_filter($gallery, fn($g) => !empty($g['src'])));
            return [
                'slug'       => $r['slug'],
                'title'      => $r['title'],
                'status'     => $r['status'],
                'gallery'    => count($gallery),
                'galleryFilled' => $filled,
                'hasInstagram'  => !empty($links['instagram']),
            ];
        }, $rows);
        $this->json(['projects' => $out]);
    }

    public function get(): void
    {
        $this->requireAdmin();
        $slug = (string) ($_GET['slug'] ?? '');
        $r = \Db::getRow('SELECT slug, title, cover_image, cover_alt, gallery, links
                          FROM cja_projects WHERE slug = ?', [$slug]);
        if (!$r) {
            $this->json(null, 404, ['code' => 'not_found', 'message' => 'No such project.']);
        }
        $this->json([
            'slug'    => $r['slug'],
            'title'   => $r['title'],
            'cover'   => $r['cover_image'] ?? '',
            'coverAlt'=> $r['cover_alt'] ?? '',
            'gallery' => json_decode($r['gallery'] ?? '[]', true) ?: [],
            'links'   => json_decode($r['links'] ?? '{}', true) ?: [],
        ]);
    }

    public function save(): void
    {
        $this->requireAdmin();
        $this->guardPublic('adminprojects_save', 60, 300);

        $in = json_decode((string) file_get_contents('php://input'), true) ?: [];
        $slug = (string) ($in['slug'] ?? '');

        $id = \Db::getValue('SELECT project_id FROM cja_projects WHERE slug = ?', [$slug]);
        if (!$id) {
            $this->json(null, 404, ['code' => 'not_found', 'message' => 'No such project.']);
        }

        // ---- gallery: array of {src, alt, caption} -------------------------
        $gallery = [];
        foreach ((array) ($in['gallery'] ?? []) as $g) {
            $src = $this->safeMedia((string) ($g['src'] ?? ''));
            $gallery[] = [
                'src'     => $src,
                'alt'     => mb_substr(trim((string) ($g['alt'] ?? '')), 0, 200),
                'caption' => mb_substr(trim((string) ($g['caption'] ?? '')), 0, 120),
            ];
        }

        // ---- links: only known keys, only real URLs ------------------------
        $links = [];
        foreach (['live', 'instagram', 'github'] as $k) {
            $v = trim((string) ($in['links'][$k] ?? ''));
            if ($v !== '' && filter_var($v, FILTER_VALIDATE_URL)) {
                $links[$k] = $v;
            }
        }

        $cover = $this->safeMedia((string) ($in['cover_image'] ?? ''));

        \Db::update('cja_projects', [
            'gallery'     => json_encode($gallery, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE),
            'links'       => json_encode($links, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE),
            'cover_image' => $cover,
        ], 'project_id = ?', [$id]);

        $this->json(['ok' => true, 'slug' => $slug]);
    }

    /**
     * Only allow local media paths (uploads live under /media/ or /projects/),
     * never arbitrary or off-site URLs — the src is rendered into the page.
     */
    private function safeMedia(string $s): string
    {
        $s = trim($s);
        if ($s === '') return '';
        return preg_match('#^/(media|projects|portfolio)/[\w./-]+$#', $s) ? $s : '';
    }
}