<?php
/**
 * @package AKSRT
 */

namespace AKSRT\Core;

defined('ABSPATH') || exit;

/**
 * Featured cover (image / slide / video) for front-end submit.
 */
trait FrontSubmitFeatured {

	/**
	 * @param array<string, mixed> $data
	 */
	private function save_featured_meta(int $post_id, array $data, int $user_id): void {
		if (empty($data['featured_data'])) {
			return;
		}

		$featured = $data['featured_data'] ?? null;
		if (is_string($featured)) {
			$decoded = json_decode(wp_unslash($featured), true);
			$featured = is_array($decoded) ? $decoded : null;
		}
		if (!is_array($featured)) {
			return;
		}

		$type = sanitize_key((string) ($featured['type'] ?? ''));
		$payload = is_array($featured['data'] ?? null) ? $featured['data'] : $featured;

		$post_meta = get_post_meta($post_id, DomainModel::POST_META_KEY, true);
		if (!is_array($post_meta)) {
			$post_meta = DomainModel::default_post_meta();
		}
		$post_meta = array_intersect_key($post_meta, DomainModel::default_post_meta());

		switch ($type) {
			case 'video':
				if (!$this->user_can_cap('new_post_video_cover', $user_id) && !$this->user_can_cap('new_post_image_cover', $user_id)) {
					return;
				}
				$video = esc_url_raw((string) ($payload['url'] ?? ''));
				$video_id = absint($payload['id'] ?? 0);
				if ($video_id > 0 && !$this->can_use_front_submit_video($video_id, $user_id)) {
					$video_id = 0;
				}
				$pic_id = absint($payload['pic_id'] ?? 0);
				if ($pic_id > 0 && !$this->can_use_front_submit_image($pic_id, $user_id)) {
					$pic_id = 0;
				}
				$pic = '';
				if ($pic_id > 0) {
					$pic = (string) wp_get_attachment_image_url($pic_id, 'full');
				}
				if ($pic === '') {
					$pic = esc_url_raw((string) ($payload['pic'] ?? ''));
					if ($pic !== '' && !$this->can_use_front_submit_image_url($pic, $user_id)) {
						$pic = '';
					}
				}
				$post_meta['featured_video'] = $video;
				$post_meta['featured_video_attachment_id'] = $video_id;
				$post_meta['featured_slide'] = '';
				$post_meta['thumbnail_url'] = '';
				$post_meta['cover_image'] = '';
				if ($pic !== '') {
					$post_meta['thumbnail_url'] = $pic;
					$post_meta['cover_image']   = $pic;
					if ($pic_id > 0) {
						set_post_thumbnail($post_id, $pic_id);
					} else {
						$this->maybe_set_thumbnail_url($post_id, $pic);
					}
				} else {
					delete_post_thumbnail($post_id);
				}
				break;

			case 'slide':
				if (!$this->user_can_cap('new_post_slide_cover', $user_id) && !$this->user_can_cap('new_post_image_cover', $user_id)) {
					return;
				}
				$ids  = array_is_list($payload) ? $payload : [];
				$attachment_ids = [];
				$urls = [];
				if (is_string($ids)) {
					$ids = array_filter(array_map('trim', explode(',', $ids)));
				}
				if (is_array($ids)) {
					foreach ($ids as $item) {
						if (is_array($item)) {
							$u = esc_url_raw((string) ($item['url'] ?? ''));
							$attachment_id = absint($item['id'] ?? 0);
							if ($attachment_id > 0 && $this->can_use_front_submit_image($attachment_id, $user_id)) {
								$src = wp_get_attachment_image_url($attachment_id, 'full');
								if ($src) {
									$attachment_ids[] = $attachment_id;
									$urls[] = $src;
								}
							} elseif ($u !== '' && $this->user_can_cap('upload_submit_image', $user_id)) {
								$urls[] = $u;
							}
						} elseif (is_numeric($item)) {
							$attachment_id = (int) $item;
							$src = $this->can_use_front_submit_image($attachment_id, $user_id)
								? wp_get_attachment_image_url($attachment_id, 'full')
								: false;
							if ($src) {
								$attachment_ids[] = $attachment_id;
								$urls[] = $src;
							}
						} else {
							$u = esc_url_raw((string) $item);
							if ($u !== '' && $this->user_can_cap('upload_submit_image', $user_id)) {
								$urls[] = $u;
							}
						}
					}
				}
				$post_meta['featured_slide'] = implode(',', array_values(array_unique($attachment_ids)));
				$post_meta['featured_video'] = '';
				$post_meta['featured_video_attachment_id'] = 0;
				$post_meta['thumbnail_url'] = '';
				$post_meta['cover_image'] = '';
				delete_post_thumbnail($post_id);
				if (!empty($urls[0]) && $this->can_use_front_submit_image_url((string) $urls[0], $user_id)) {
					$post_meta['thumbnail_url'] = $urls[0];
					$post_meta['cover_image']   = $urls[0];
					$this->maybe_set_thumbnail_url($post_id, $urls[0]);
				}
				break;

			case 'image':
				if (!$this->user_can_cap('new_post_image_cover', $user_id)) {
					return;
				}
				$url = esc_url_raw((string) ($payload['url'] ?? ''));
				$id  = absint($payload['id'] ?? 0);
				if ($id > 0 && !$this->can_use_front_submit_image($id, $user_id)) {
					return;
				}
				if ($url === '' && $id > 0) {
					$src = wp_get_attachment_image_url($id, 'full');
					if ($src) {
						$url = $src;
					}
				}
				$post_meta['featured_video'] = '';
				$post_meta['featured_video_attachment_id'] = 0;
				$post_meta['featured_slide'] = '';
				if ($url !== '' && $this->can_use_front_submit_image_url($url, $user_id)) {
					$post_meta['thumbnail_url'] = $url;
					$post_meta['cover_image']   = $url;
					if ($id > 0) {
						set_post_thumbnail($post_id, $id);
					} elseif ($this->user_can_cap('upload_submit_image', $user_id)) {
						$this->maybe_set_thumbnail_url($post_id, $url);
					}
				}
				break;

			case 'close':
			case 'none':
			case 'clear':
				$post_meta['featured_video'] = '';
				$post_meta['featured_video_attachment_id'] = 0;
				$post_meta['featured_slide'] = '';
				$post_meta['thumbnail_url']  = '';
				$post_meta['cover_image']    = '';
				delete_post_thumbnail($post_id);
				break;

			default:
				return;
		}

		unset($post_meta['views'], $post_meta['like']);
		update_post_meta($post_id, DomainModel::POST_META_KEY, $post_meta);
	}

	private function maybe_set_thumbnail_url(int $post_id, string $url): void {
		if ($url === '') {
			return;
		}
		// Prefer attachment if URL is local media.
		$attach_id = attachment_url_to_postid($url);
		if ($attach_id > 0) {
			set_post_thumbnail($post_id, $attach_id);
			return;
		}
		$this->set_thumbnail_from_url($post_id, $url);
	}

	private function can_use_front_submit_image(int $attachment_id, int $user_id): bool {
		if ($attachment_id <= 0 || !$this->user_can_cap('upload_submit_image', $user_id)) {
			return false;
		}
		$attachment = get_post($attachment_id);
		return $attachment instanceof \WP_Post
			&& $attachment->post_type === 'attachment'
			&& (int) $attachment->post_author === $user_id
			&& wp_attachment_is_image($attachment_id);
	}

	private function can_use_front_submit_image_url(string $url, int $user_id): bool {
		$attachment_id = attachment_url_to_postid($url);
		return $attachment_id > 0 && $this->can_use_front_submit_image($attachment_id, $user_id);
	}

	private function can_use_front_submit_video(int $attachment_id, int $user_id): bool {
		if ($attachment_id <= 0 || !$this->user_can_cap('new_post_video_cover', $user_id)) {
			return false;
		}
		$attachment = get_post($attachment_id);
		return $attachment instanceof \WP_Post
			&& $attachment->post_type === 'attachment'
			&& (int) $attachment->post_author === $user_id
			&& in_array($attachment->post_status, ['inherit', 'private'], true)
			&& strpos((string) $attachment->post_mime_type, 'video/') === 0;
	}
}