"use strict";

import NoteSet from "../note_set.js";
import SearchContext from "../search_context.js";
import Expression from "./expression.js";
import TrueExp from "./true.js";

class AndExp extends Expression {
    subExpressions: Expression[];

    static of(_subExpressions: (Expression | null | undefined)[]) {
        const subExpressions = _subExpressions.filter((exp) => !!exp) as Expression[];

        if (subExpressions.length === 1) {
            return subExpressions[0];
        } else if (subExpressions.length > 0) {
            return new AndExp(subExpressions);
        } else {
            return new TrueExp();
        }
    }

    constructor(subExpressions: Expression[]) {
        super();
        this.subExpressions = subExpressions;
    }

    execute(inputNoteSet: NoteSet, executionContext: {}, searchContext: SearchContext) {
        for (const subExpression of this.subExpressions) {
            inputNoteSet = subExpression.execute(inputNoteSet, executionContext, searchContext);
        }

        return inputNoteSet;
    }
}

export default AndExp;