import {Command, CommandData, ParseContext, StrTerm} from "./command.js";
import {Executable} from "../parse.js";
import {LexInput} from "../lexer.js";

export type OnData = {
    type: 'line'|'word',
    specific: StrTerm,
    exec: Executable<CommandData>,
}

export class On extends Command<OnData> {
    async attemptParse(context: ParseContext): Promise<OnData> {
        return {
            type: context.popKeywordInSet(['line', 'word']).value,
            specific: context.popTerm(),
            exec: await context.popExecutable(),
        }
    }

    getDisplayName(): string {
        return 'on'
    }

    isParseCandidate(token: LexInput): boolean {
        return this.isKeyword(token, 'on')
    }
}