<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: Sebastian Krupinski <krupinski01@gmail.com>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace KTXM\ProviderImap\Providers;

use KTXF\Mail\Object\MessagePartMutableAbstract;
use KTXM\ProviderImap\Client\MessagePart as ImapMessagePart;

/**
 * Mail Message Part Implementation
 */
class MessagePart extends MessagePartMutableAbstract {

    /**
     * Convert gricob BodyStructure part to message part object
     *
     * @param Part $part gricob BodyStructure Part (SinglePart or MultiPart)
     * @param string $partId numeric part identifier (e.g. "1", "1.1", "2")
     */
    public function fromImap(ImapMessagePart $part, string $partId = '1'): static {

        $this->data['partId'] = $partId;

        if ($part instanceof SinglePart) {
            $mimeType = strtolower($part->type) . '/' . strtolower($part->subtype);
            $this->data['type'] = $mimeType;

            if ($part->id !== null) {
                $this->data['blobId'] = trim($part->id, '<>');
            }

            // Content-Type parameters (name, charset, etc.)
            if (!empty($part->attributes)) {
                foreach ($part->attributes as $key => $value) {
                    $keyLower = strtolower($key);
                    if ($keyLower === 'name') {
                        $this->data['name'] = $value;
                    } elseif ($keyLower === 'charset') {
                        $this->data['charset'] = $value;
                    }
                }
            }

            if ($part->encoding !== null) {
                $this->data['encoding'] = strtolower($part->encoding);
            }

            if ($part->size !== null) {
                $this->data['size'] = $part->size;
            }

            if ($part->disposition !== null) {
                $this->data['disposition'] = strtolower($part->disposition->type);
                // disposition filename attribute
                if (!empty($part->disposition->attributes)) {
                    foreach ($part->disposition->attributes as $key => $value) {
                        if (strtolower($key) === 'filename') {
                            $this->data['name'] = $this->data['name'] ?? $value;
                        }
                    }
                }
            }

            if (!empty($part->language)) {
                $this->data['language'] = implode(',', $part->language);
            }

            if ($part->location !== null) {
                $this->data['location'] = $part->location;
            }

        } elseif ($part instanceof MultiPart) {
            $this->data['type'] = 'multipart/' . strtolower($part->subtype);

            if ($part->disposition !== null) {
                $this->data['disposition'] = strtolower($part->disposition->type);
            }

            if (!empty($part->language)) {
                $this->data['language'] = implode(',', $part->language);
            }

            if ($part->location !== null) {
                $this->data['location'] = $part->location;
            }

            // Recursively process sub-parts
            // When this part has no section ID (root multipart) children are
            // numbered "1", "2", … to match IMAP section numbering.
            foreach ($part->parts as $index => $subPart) {
                $subPartId = ($partId === '') ? (string)($index + 1) : $partId . '.' . ($index + 1);
                $this->parts[] = (new MessagePart())->fromImap($subPart, $subPartId);
            }
        }

        return $this;
    }

}