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import fs from 'node:fs';

import {beforeAll, describe, expect, it} from 'vitest';

import * as properties from '../lib/properties.js';
import {PythonAstParser} from '../lib/python-ast.js';
import * as utils from '../lib/utils.js';

const languages = {
    python: {id: 'python'},
};

function mockAstOutput(astLines: string[]) {
    return {stdout: astLines.map(l => ({text: l}))};
}

describe('python-ast', () => {
    let compilerProps;
    let astParser: any;

    let shortAstDump: string[];
    let longAstDump: string[];

    beforeAll(() => {
        const fakeProps = new properties.CompilerProps(
            languages,
            properties.fakeProps({
                maxLinesOfAst: 100,
            }),
        );
        compilerProps = (fakeProps.get as any).bind(fakeProps, 'python');
        astParser = new PythonAstParser(compilerProps);

        shortAstDump = utils.splitLines(fs.readFileSync('test/ast/python-short.ast').toString());
        longAstDump = utils.splitLines(fs.readFileSync('test/ast/python-long.ast').toString());
    });

    it('keeps original lines on short ast output', () => {
        const processedLines = astParser.processAst(mockAstOutput(shortAstDump));
        expect(processedLines.length).toBe(shortAstDump.length);
    });

    it('truncates long ast output', () => {
        const processedLines = astParser.processAst(mockAstOutput(longAstDump));
        expect(processedLines.length).toBe(100);
    });
});