const assert = require('node:assert/strict');
const test = require('node:test');

const { EftlParser } = require('../out/parser');
const { EftlTokenizer } = require('../out/tokenizer');

function parse(source) {
    const { tokens, errors: tokenizerErrors } = new EftlTokenizer(source).tokenize();
    assert.deepEqual(tokenizerErrors, []);
    return new EftlParser(tokens).parse().errors;
}

test('accepts a correctly closed VAR tag', () => {
    assert.deepEqual(parse('[VAR][/VAR]'), []);
});

test('reports a VAR tag without its closing tag', () => {
    assert.deepEqual(parse('[VAR]'), [{
        message: 'Unclosed tag: [VAR] (expected [/VAR])',
        line: 1,
        column: 1,
        length: 5
    }]);
});

test('reports an unexpected closing tag', () => {
    const errors = parse('[/VAR]');

    assert.equal(errors.length, 1);
    assert.match(errors[0].message, /Unexpected closing tag/);
});

test('reports every unclosed nested tag at its opening token', () => {
    assert.deepEqual(parse('[EFTL]\n[VAR]'), [
        {
            message: 'Unclosed tag: [EFTL] (expected [/EFTL])',
            line: 1,
            column: 1,
            length: 6
        },
        {
            message: 'Unclosed tag: [VAR] (expected [/VAR])',
            line: 2,
            column: 1,
            length: 5
        }
    ]);
});