import * as assert from 'assert';
import * as vscode from 'vscode';
import { toVscodeDiagnostics } from '../src/diagnostics/diagnosticMarkers';
import type { LinterDiagnostic } from '../src/types';

suite('DiagnosticMarkers Tests', () => {
  test('toVscodeDiagnostics maps severity correctly', () => {
    const diags: LinterDiagnostic[] = [
      { severity: 'error', ruleId: 'eslint:no-unused', message: 'unused', range: new vscode.Range(0, 0, 0, 5) },
      { severity: 'warning', ruleId: 'pmd:avoid-duplicate', message: 'duplicate', range: new vscode.Range(1, 0, 1, 3) },
      { severity: 'info', ruleId: 'custom:no-console', message: 'console', range: new vscode.Range(2, 0, 2, 4) },
    ];

    const result = toVscodeDiagnostics(diags);

    assert.strictEqual(result[0].severity, vscode.DiagnosticSeverity.Error);
    assert.strictEqual(result[1].severity, vscode.DiagnosticSeverity.Warning);
    assert.strictEqual(result[2].severity, vscode.DiagnosticSeverity.Information);
  });

  test('toVscodeDiagnostics preserves range', () => {
    const range = new vscode.Range(3, 2, 5, 10);
    const diags: LinterDiagnostic[] = [
      { severity: 'error', ruleId: 'eslint:no-var', message: 'no var', range },
    ];

    const result = toVscodeDiagnostics(diags);

    assert.ok(result[0].range.isEqual(range));
  });

  test('toVscodeDiagnostics prefixes message with plugin and linter', () => {
    const diags: LinterDiagnostic[] = [
      { severity: 'warning', ruleId: 'eslint:no-console', message: 'avoid console', range: new vscode.Range(0, 0, 0, 1) },
    ];

    const result = toVscodeDiagnostics(diags);

    assert.strictEqual(result[0].message, '[Code Purifier · eslint] no-console: avoid console');
  });

  test('toVscodeDiagnostics handles ruleId without linter prefix', () => {
    const diags: LinterDiagnostic[] = [
      { severity: 'warning', ruleId: 'custom-rule', message: 'custom message', range: new vscode.Range(0, 0, 0, 1) },
    ];

    const result = toVscodeDiagnostics(diags);

    assert.strictEqual(result[0].message, '[Code Purifier] custom-rule: custom message');
  });

  test('toVscodeDiagnostics sets source and code for quick fix hover', () => {
    const diags: LinterDiagnostic[] = [
      { severity: 'warning', ruleId: 'eslint:no-var', message: 'no var', range: new vscode.Range(0, 0, 0, 1) },
    ];

    const result = toVscodeDiagnostics(diags);

    assert.strictEqual(result[0].source, 'Code Purifier');
    assert.strictEqual(result[0].code, 'eslint:no-var');
  });

  test('toVscodeDiagnostics returns empty array for empty input', () => {
    assert.deepStrictEqual(toVscodeDiagnostics([]), []);
  });
});