export function isObject(obj: any): boolean {
    return obj !== null && typeof obj === "object";
}

export function isString(obj: any): boolean {
    return obj !== null && (typeof obj === "string" || obj instanceof String);
}

export function looseEqual(a: any, b: any): boolean {
    if (a === b) return true;
    const isObjectA = isObject(a);
    const isObjectB = isObject(b);
    if (isObjectA && isObjectB) {
        try {
            const isArrayA = Array.isArray(a);
            const isArrayB = Array.isArray(b);
            if (isArrayA && isArrayB) {
                return (
                    a.length === b.length &&
                    a.every((e, i) => {
                        return looseEqual(e, b[i]);
                    })
                );
            } else if (a instanceof Date && b instanceof Date) {
                return a.getTime() === b.getTime();
            } else if (!isArrayA && !isArrayB) {
                const keysA = Object.keys(a);
                const keysB = Object.keys(b);
                return (
                    keysA.length === keysB.length &&
                    keysA.every((key) => {
                        return looseEqual(a[key], b[key]);
                    })
                );
            } else {
                return false;
            }
        } catch (e) {
            return false;
        }
    } else if (!isObjectA && !isObjectB) {
        return String(a) === String(b);
    } else {
        return false;
    }
}

export function override(target: Object, source: Object) {
    if (!isObject(source)) return target;

    for (const prop in source) {
        target[prop] = source[prop];
    }

    return target;
}

export function debounce(callback: Function, time: number = 300) {
    let lastestValue: any;
    let timer: any;
    return (value: any) => {
        lastestValue = value;
        if (timer != null) {
            clearTimeout(timer);
            timer = null;
        }
        timer = setTimeout(() => {
            callback(lastestValue);
        }, time);
    };
}