import objs from './objs.mjs';

let openers = {
    '{': '}',
    '[': ']',
    '(': ')'
};

let specialOpeners = {
    //':': 'wildcard'
};

function parser(str, context = '(') {
    str = str.replaceAll(/^\s+([^\s]+)/gms, '$1')
    str = str.replaceAll(/([^\s]+)\s+$/gms, '$1')

    let nextI = str.search(/[^A-Za-z0-9;\s]/gms);

    if (context == '[') {
        nextI = str.search(/[\]]/);
    }
    if (nextI == -1) nextI = 0;

    let nextChar = str[nextI];

    let sliced = str.slice(0, nextI);
    let rest =  str.slice(nextI + 1);

    if (nextChar == openers[context] || !(openers[context])) {
        return { context, str: sliced, next: rest, end: nextChar == openers[context] || sliced.indexOf(';') != -1};
    } else {
        let args = [];
        let nextStr = rest;

        while (nextStr && nextStr.length > 0) {
            args.push(parser(nextStr, nextChar));
            let a = args[args.length - 1];
            nextStr = a.next;
            if (a.str == '') {
                args.pop();
            }
            if (a.end) break;
        }

        let o = { context: sliced, args, next: nextStr, op: nextChar };

        return o;
    }
}

async function runner(script, objects) {
    let { op, context } = script;
    let obj = objects[context.trim()];

    let h = false;

    if (op == '{') {
        h = (async function () {
            let output = false;
            for (let a of script.args) {
                output = await runner(a, objects);
            }
            return output;
        })
    } else if (op == '(') {
        let arger = [];

        for (let arg of script.args) {
            arger.push(await runner(arg, objects));
        }

        if (arger.length == 1) arger = arger[0];

        h = arger;
    } else if (op == '[') {
        h = script.args[0].str;
    }

    if (typeof obj != 'function') {
        return h;
    }

    return await obj(h, objects);
}

let data = parser(`
    on(
        [start]
        {
            echo(add([2][3]))
            echo([Hello World!])
            echo(add([2][3]))
            echo([Hello World!])
        }
    )
`);

console.log(data);

(async function () {
    await runner(data, objs);
    let ev = new Event('start');
    
    objs.events.dispatchEvent(ev);    
})()