'use strict'
/**
 * Copyright (c) 2017~2021, OBCon Inc.
 * All rights reserved.
 */

/**
 * @file
 * @copyright 2017~2021, OBCon Inc.
 * @author gye hyun james kim [pnuskgh@gmail.com]
 */

const Sequelize = require('sequelize');
const path = require('path');;
const fs = require('fs');
const Batch = utils.getClass('include', 'batch.js');

//--- node  bin/cms_batch.js  --conf  config_batch_override.js
// conf['batch'] = {
//     path: ['modules', 'batch', 'MediaWikiDBToFile.js'],
//     options: {},
//     waitTime: 1
// };
class MediaWikiDBToFile extends Batch {
    constructor() {
        super();

        this._folder = 'C:/work/obcon/obcon/manual/service_cms_jopenbusiness/default/ko_KR/Jopenbusiness';
    }

    async batchJob(options = {}, callback) {
        try {
            const sequelize = new Sequelize(options.database, options.username, options.password, options);

            let count = 0;
            let save_page_id = -1;
            let save_item = null;
            for (let idx of [ 0, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000 ]) {
            // for (let idx of [ 600, 610 ]) {
                let page_id_fr = idx;
                let page_id_to = idx + 500;

                // let page_id_to = idx + 20;
            
                // let page_id_fr = 602;
                // let page_id_to = 603;
                //--- page_namespace : 0. 일반, 6. 파일, 10. 틀, 14. 분류
                let query = `\
                    SELECT a.page_id, a.page_namespace, a.page_title, b.rev_id, b.rev_parent_id, c.old_id, c.old_text \
                    FROM jopen_page a, jopen_revision b, jopen_text c \
                    WHERE ${page_id_fr} <= a.page_id \
                      AND a.page_id < ${page_id_to} \
                      AND a.page_namespace IN (0, 10, 14) \
                      AND a.page_is_redirect = 0 \
                      AND b.rev_deleted = 0 \
                      AND a.page_id = b.rev_page \
                      AND b.rev_text_id = c.old_id \
                    ORDER BY a.page_namespace DESC, a.page_id ASC, b.rev_parent_id ASC`;
 
                let data = await sequelize.query(query, { type: Sequelize.QueryTypes.SELECT, tableHint: Sequelize.TableHints.NOLOCK });
                for (let item of data) {
                    // console.log(`Read ${item.page_namespace}, ${item.page_id}, ${item.page_title}, ${item.rev_parent_id}, ${item.old_id}`);
                    if (save_page_id == -1) {
                        save_page_id = item.page_id;
                        save_item = item;
                        // console.log(`    save page_id : ${save_item.page_id}, ${save_item.rev_parent_id}`);
                        continue;
                    } 

                    if (item.page_id != save_page_id) {
                        count = count + 1;
                        // console.log(`saveFile ${count} : ${save_item.page_namespace}, ${save_item.page_id}, ${save_item.page_title}, ${save_item.rev_parent_id}, ${save_item.old_id}`);
                        this.saveFile(count, save_item);
                        
                        save_page_id = item.page_id;
                        save_item = item;
                        // console.log(`    save page_id : ${save_item.page_id}, ${save_item.rev_parent_id}`);
                    } else {
                        // console.log(`    Skip ${save_page_id} : ${save_item.page_namespace}, ${save_item.page_id}, ${save_item.page_title}, ${save_item.rev_parent_id}`);
                        save_item = item;
                    }
                }
            }
            if (save_item != null) {
                count = count + 1;
                console.log(`saveFile ${count} : ${save_item.page_namespace}, ${save_item.page_id}, ${save_item.page_title}, ${save_item.old_id}`);
                this.saveFile(count, save_item);
            }
            console.log('');
            callback(0, 'ok');
        } catch (error) {
            console.log(error);
            callback(101, JSON.stringify(error));
        }
    }

    saveFile(count, item) {
        let folder = null;
        let filename  = `${item.page_title}.mediawiki`;
        
        if (-1 < filename.indexOf('/')) {
            let data = filename.split('/');
            switch (data.length) {
            case 4:
                folder = `${data[0]}/${data[1]}/${data[2]}`;
                filename  = data[3];
                if ((folder != null) && (!fs.existsSync(path.join(this._folder, 'folderMediawiki', folder)))) {
                    fs.mkdirSync(path.join(this._folder, 'folderMediawiki', folder));
                }
                break;
            case 3:
                folder = `${data[0]}/${data[1]}`;
                filename  = data[2];
                if ((folder != null) && (!fs.existsSync(path.join(this._folder, 'folderMediawiki', folder)))) {
                    fs.mkdirSync(path.join(this._folder, 'folderMediawiki', folder));
                }
                break;
            default:
                folder = data[0];
                filename  = data[1];
                if ((folder != null) && (!fs.existsSync(path.join(this._folder, 'folderMediawiki', folder)))) {
                    fs.mkdirSync(path.join(this._folder, 'folderMediawiki', folder));
                }
                break;
            }
        }

        switch (item.page_namespace) {
        case 14: filename = `분류_${filename}`; break;
        case 10: filename = `틀_${filename}`;   break;
        }

        if (item.old_text == null) {
            if (folder == null) {
                console.log(`Makefile skip null : ${count}, ${item.page_title}.mediawiki, ${filename}`);
            } else {
                console.log(`Makefile skip null : ${count}, ${item.page_title}.mediawiki, ${folder}, ${filename}`);
            }
        } else {
            if (folder == null) {
                console.log(`Makefile : ${count}, ${item.page_title}.mediawiki, ${filename}`);
                fs.writeFileSync(path.join(this._folder, 'folderMediawiki', filename), item.old_text,'utf-8');        
            } else {
                console.log(`Makefile : ${count}, ${item.page_title}.mediawiki, ${folder}, ${filename}`);
                fs.writeFileSync(path.join(this._folder, 'folderMediawiki', folder, filename), item.old_text,'utf-8');        
            }
        }
    }
}

module.exports = MediaWikiDBToFile;