import { describe, it, expect } from 'vitest';
import { CodeBuilder } from '@/application/Context/State/Code/Generation/CodeBuilder';
import { splitTextIntoLines } from '@/application/Common/Text/SplitTextIntoLines';

describe('CodeBuilder', () => {
  class CodeBuilderConcrete extends CodeBuilder {
    private commentDelimiter = '//';

    private newLineTerminator = '\n';

    public withCommentDelimiter(delimiter: string): CodeBuilderConcrete {
      this.commentDelimiter = delimiter;
      return this;
    }

    public withNewLineTerminator(terminator: string): CodeBuilderConcrete {
      this.newLineTerminator = terminator;
      return this;
    }

    protected getCommentDelimiter(): string {
      return this.commentDelimiter;
    }

    protected writeStandardOut(text: string): string {
      return text;
    }

    protected getNewLineTerminator(): string {
      return this.newLineTerminator;
    }
  }
  describe('appendLine', () => {
    it('when empty appends empty line', () => {
      // arrange
      const sut = new CodeBuilderConcrete();
      // act
      sut.appendLine().appendLine().appendLine();
      // assert
      expect(sut.toString()).to.equal('\n\n');
    });
    it('when not empty append string in new line', () => {
      // arrange
      const sut = new CodeBuilderConcrete();
      const expected = 'str';
      // act
      sut.appendLine()
        .appendLine(expected);
      // assert
      const result = sut.toString();
      const lines = splitTextIntoLines(result);
      expect(lines[1]).to.equal('str');
    });
    describe('append multi-line string correctly', () => {
      it('appends multi-line string with empty lines preserved', () => {
        // arrange
        const sut = new CodeBuilderConcrete();
        const expectedLines: string[] = ['', 'line1', '', 'line2', '', '', 'line3', '', ''];
        const multilineInput = expectedLines.join('\n');

        // act
        sut.appendLine(multilineInput);
        const actual = sut.toString();

        // assert
        const actualLines = splitTextIntoLines(actual);
        expect(actualLines).to.deep.equal(expectedLines);
      });
      describe('recognizes different line terminators', () => {
        const delimiters = ['\n', '\r\n', '\r'];
        for (const delimiter of delimiters) {
          it(`using "${JSON.stringify(delimiter)}"`, () => {
            // arrange
            const line1 = 'line1';
            const line2 = 'line2';
            const code = `${line1}${delimiter}${line2}`;
            const sut = new CodeBuilderConcrete();
            // act
            sut.appendLine(code);
            // assert
            const result = sut.toString();
            const lines = splitTextIntoLines(result);
            expect(lines).to.have.lengthOf(2);
            expect(lines[0]).to.equal(line1);
            expect(lines[1]).to.equal(line2);
          });
        }
      });
      it('normalizes different line terminators', () => {
        // arrange
        const lineTerminator = '🐒';
        const lines = ['line1', 'line2', 'line3', 'line4'];
        const code = `${lines[0]}\n${lines[1]}\r\n${lines[2]}\r${lines[3]}`;
        const expected = `${lines[0]}${lineTerminator}${lines[1]}${lineTerminator}${lines[2]}${lineTerminator}${lines[3]}`;
        const sut = new CodeBuilderConcrete()
          .withNewLineTerminator(lineTerminator);
        // act
        const actual = sut
          .appendLine(code)
          .toString();
        // assert
        expect(actual).to.equal(expected);
      });
    });
  });
  it('appendFunction', () => {
    // arrange
    const sut = new CodeBuilderConcrete();
    const functionName = 'expected-function-name';
    const code = 'expected-code';
    // act
    sut.appendFunction(functionName, code);
    // assert
    const result = sut.toString();
    expect(result).to.include(functionName);
    expect(result).to.include(code);
  });
  it('appendTrailingHyphensCommentLine', () => {
    // arrange
    const commentDelimiter = '//';
    const sut = new CodeBuilderConcrete()
      .withCommentDelimiter(commentDelimiter);
    const totalHyphens = 5;
    const expected = `${commentDelimiter} ${'-'.repeat(totalHyphens)}`;
    // act
    sut.appendTrailingHyphensCommentLine(totalHyphens);
    // assert
    const result = sut.toString();
    const lines = splitTextIntoLines(result);
    expect(lines[0]).to.equal(expected);
  });
  it('appendCommentLine', () => {
    // arrange
    const commentDelimiter = '//';
    const sut = new CodeBuilderConcrete()
      .withCommentDelimiter(commentDelimiter);
    const comment = 'comment';
    const expected = `${commentDelimiter} comment`;
    // act
    const result = sut
      .appendCommentLine(comment)
      .toString();
    // assert
    const lines = splitTextIntoLines(result);
    expect(lines[0]).to.equal(expected);
  });
  it('appendCommentLineWithHyphensAround', () => {
    // arrange
    const commentDelimiter = '//';
    const sut = new CodeBuilderConcrete()
      .withCommentDelimiter(commentDelimiter);
    const sectionName = 'section';
    const totalHyphens = sectionName.length + 3 * 2;
    const expected = `${commentDelimiter} ---section---`;
    // act
    const result = sut
      .appendCommentLineWithHyphensAround(sectionName, totalHyphens)
      .toString();
    // assert
    const lines = splitTextIntoLines(result);
    expect(lines[1]).to.equal(expected);
  });
  describe('currentLine', () => {
    it('no lines returns zero', () => {
      // arrange & act
      const sut = new CodeBuilderConcrete();
      // assert
      expect(sut.currentLine).to.equal(0);
    });
    it('single line returns one', () => {
      // arrange
      const sut = new CodeBuilderConcrete();
      // act
      sut.appendLine();
      // assert
      expect(sut.currentLine).to.equal(1);
    });
    it('multiple lines returns as expected', () => {
      // arrange
      const sut = new CodeBuilderConcrete();
      // act
      sut.appendLine('1')
        .appendCommentLine('2')
        .appendLine();
      // assert
      expect(sut.currentLine).to.equal(3);
    });
    it('multiple lines in code', () => {
      // arrange
      const sut = new CodeBuilderConcrete();
      // act
      sut.appendLine('hello\ncode-here\nwith-3-lines');
      // assert
      expect(sut.currentLine).to.equal(3);
    });
  });
});