const fs = require('fs');
const axios = require('axios');
const path = require('path');
const simpleParser = require('mailparser').simpleParser;

/*
指定したフォルダに有るemlファイルを1つずつ分析する
メッセージ項目と添付ファイルを取得し、プリザンターにアップロードする

*/
// emlファイルの保管先と完了ファイル移動先を固定変数で指定
const EML_SOURCE_DIR = './eml_files'; // ここを任意のパスに変更可
const EML_DONE_DIR = './eml_done';    // ここを任意のパスに変更可

// 必要なら移動先フォルダを作成
if (!fs.existsSync(EML_DONE_DIR)) {
    fs.mkdirSync(EML_DONE_DIR, { recursive: true });
}

const folderPath = EML_SOURCE_DIR;

async function processEmlFiles() {
    try {
        const files = fs.readdirSync(folderPath).filter(file => file.endsWith('.eml'));

        for (const file of files) {
            const filePath = path.join(folderPath, file);
            const parsed = await simpleParser(fs.createReadStream(filePath));

            const messageData = {
                from: parsed.from?.text,
                to: parsed.to?.text,
                subject: parsed.subject,
                text: parsed.text,
                html: parsed.html,
                date: parsed.date
            };

            console.log(`Processing: ${file}`);
            console.log('Message:', messageData);

            // Handle attachments
            if (parsed.attachments?.length > 0) {
                for (const attachment of parsed.attachments) {
                    console.log(`Attachment: ${attachment.filename}`);
                }
            }

            // Upload to Pleasanter
            if (parsed.attachments?.length > 0) {
                const firstAttachment = parsed.attachments[0];
                const base64Data = firstAttachment.content.toString('base64');
                await uploadToPleasanter(messageData, firstAttachment.filename, base64Data);
            }

            // 取り込み完了したemlファイルを移動（ファイル名の先頭に【済】を付与、重複時は連番）
            const ext = path.extname(file);
            const base = path.basename(file, ext);
            let doneName = `【済】${base}${ext}`;
            let destPath = path.join(EML_DONE_DIR, doneName);
            let count = 1;
            while (fs.existsSync(destPath)) {
                doneName = `【済】${base}(${count})${ext}`;
                destPath = path.join(EML_DONE_DIR, doneName);
                count++;
            }
            fs.renameSync(filePath, destPath);
            console.log(`Moved ${file} to ${destPath}`);
        }
    } catch (error) {
        console.error('Error processing EML files:', error);
    }
}

async function uploadToPleasanter(messageData, filename, base64Content) {
    const apiKey = '6504c8a807677a3a576e10327f3c19876c55736ee45d4a845796b9e7f5e087bfd4bd0d8184863da8cf1733ca635111432ab334aea59102b06a96ee6d2c05190d';
    const siteId = '451995'; // ←ご自身のサイトIDに変更してください
    const url = `https://nextoffice.next-hd.co.jp/pleasanter/api/items/${siteId}/create`;

    const lines = messageData.text.split('\n');
    const extractedLines = lines.slice(6, 9).join('\n');

    const uploadData = {
        "ApiVersion": 1.1,
        "ApiKey": apiKey,
        "Body": extractedLines,
        "AttachmentsHash": {
            "AttachmentsA": [
                {
                    "Name": filename,
                    "Base64": base64Content
                }
            ]
        },
    };

    try {
        const response = await axios.post(url, uploadData);

        console.log('Pleasanter登録結果:', response.data);
    } catch (error) {
        console.error('Pleasanter登録エラー:', error.response?.data || error.message);
    }
}

processEmlFiles();