const readxml = require("./xml");
const {readFile, writeFile} = require("fs/promises");

/** @param {string} tr */
const readItem = tr => {
    let ret = {}, start = 0, token = null, state = 0, tmp = null;
    do{
        if( tr.charAt(start) === '"') {
            let end = tr.indexOf('"', start + 1);
            if( end < 0 ) throw new SyntaxError(`no match quito [${tr}]`);
            token = tr.slice(start+1, end);
            start = end + 2;
        }
        else {
            let end = tr.indexOf(" ", start);
            if( end < 0 ) break;
            token = tr.slice(start, end);
            start = end + 1;
        }

        if( state === 0 ){
            tmp = token;
            state = 1;
        }
        else {
            ret[ tmp ] = token;
            state = 0;
        }
    }while( true );
    if( state == 0 ) throw new SyntaxError(`invalid at [${tr}], ret is ${JSON.stringify(ret)}`);
    ret[ tmp ] = tr.slice( start );
    ret.name = ret.name.slice(0, -4);
    return ret;
}

const readDat = s => {
    return s.match( /^\trom\s.*$/mg ).map( r => readItem( r.slice(1+"rom ( ".length, r.length-" )".length) ) );
}

const start = async() => {
    const data = await readFile("/root/oafb-tool/material/gba.xml");
    const xml = readxml( data.toString() );
    const rom = await readFile("./cover.dat");
    const roms = readDat( rom.toString() );
    const romidx = roms.reduce( (r, v) => {
        r[ `${v.crc.toLowerCase().padStart(8,"0")}${v.sha1.toLowerCase()}` ] = v;
        return r;
    }, {});

    const db = {};
    for( let rom of xml.children ){
        const rominfo = rom.children;
        const description = rominfo.find( t => t.name === "description" )?.children[0];
        const publisher = rominfo.find( t => t.name === "publisher" )?.children[0];
        const year = rominfo.find( t => t.name === "year" )?.children[0];
        const serial = rominfo.find( t => t.name === "info" && t.attributes.name === "serial" )?.attributes.value;
        const part = rominfo.find( t => t.name === "part" )?.children.find( t => t.name === "dataarea" && t.attributes.name === "rom" )?.children[0];
        if( part && serial ){
            let ren = romidx[ `${part.attributes.crc.toLowerCase().padStart(8, "0")}${part.attributes.sha1.toLowerCase()}` ];
            if( ren ){
                let out = { file: ren.name, publisher, year, name: rom.attributes.name };
                serial.match(/AGB-[A-Z0-9]{4}/g)?.forEach( ser => db[ser.slice(-4)] = out );
            }
            else console.error( "no match rom", rom.attributes.name );// 可以手动修复
        }
        else console.error( "invalid rom", rom.attributes.name );// 不做修复
    }
    await writeFile("/root/oafb-tool/material/webdb.json", JSON.stringify(db, 0));
}

start();