import { IDriver, IElement } from "../../common/IDriver";
import { dfr_run } from "../../utils/dfr";
import { Deferred } from "../../types/Deferred";

export function node_eval(node: IElement | IDriver, mix: string | Function, ...args: any[]): Promise<any> {
    return dfr_run((resolve, reject) => {

        var script = node_toScript(mix);
        var driver = node_getDriver(node);
        if (driver == null) {
            reject(new Error('Driver is not resolved.'));
            return;
        }
        let arr = node == driver ? args : [ node, ...args ];

        driver
            .executeScript(script, ...arr)
            .then(result => {
                resolve(result);
            }, error => {
                console.error('Unexpected sync browser error', error, 'for', script);
                resolve();
            });
    });
};

export function node_evalAsync(node: IElement | IDriver, mix: string | Function, ...args: any[]): Promise<any> {
    return dfr_run((resolve, reject) => {

        var script = node_toScript(mix);
        var driver = node_getDriver(node);
        if (driver == null) {
            reject(new Error('Driver is not resolved.'));
            return;
        }
        driver
            .executeAsyncScript(script, node, ...args)
            .then(resolve, error => {
                console.error('Unexpected async browser error', error, 'for', script);
                resolve();
            });
    });
};


export function node_getDriver(node: IDriver | IElement): IDriver {
    if ('executeScript' in node) {
        return node;
    }
    if ('getDriver' in node) {
        return node.getDriver();
    }
    return (node as any).driver_;
}

export function node_toScript(mix: string | Function) {
    if (typeof mix === 'string') {
        return mix;
    }
    var script = mix.toString();
    var arrowRgx = /^[^\)]+\)\s*=>/;
    if (arrowRgx.test(script)) {
        script = script.replace(arrowRgx, '').trim();
        if (script[0] !== '{') {
            // oneliner
            return `return ${script}`;
        }
    }

    script = script.substring(script.indexOf('{') + 1);
    script = script.substring(0, script.lastIndexOf('}') - 1);
    script = script.trim();
    return script;
}