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module trial.reporters.tap;

import std.conv;
import std.string;
import std.algorithm;

version(Have_fluent_asserts) {
  import fluentasserts.core.base;
  import fluentasserts.core.results;
}

import trial.interfaces;
import trial.reporters.writer;


class TapReporter : ILifecycleListener, ITestCaseLifecycleListener
{
  private {
    ReportWriter writer;
  }


  this()
  {
    writer = defaultWriter;
  }


  this(ReportWriter writer)
  {
    this.writer = writer;
  }


  void begin(ulong testCount) {
    writer.writeln("TAP version 13", ReportWriter.Context._default);
    writer.writeln("1.." ~ testCount.to!string, ReportWriter.Context._default);
  }


  void update() { }


  void end(SuiteResult[]) { }


  void begin(string, ref TestResult)
  {
  }


  void end(string suite, ref TestResult test)
  {
    if(test.status == TestResult.Status.success) {
      writer.writeln("ok - " ~ suite ~ "." ~ test.name, ReportWriter.Context._default);
    } else {
      writer.writeln("not ok - " ~ suite ~ "." ~ test.name, ReportWriter.Context._default);

      version(Have_fluent_asserts) {
        if(test.throwable !is null) {
          if(cast(TestException) test.throwable !is null) {
            printTestException(test);
          } else {
            printThrowable(test);
          }

          writer.writeln("");
        }
      } else {
        printThrowable(test);
      }
    }
  }

  version(Have_fluent_asserts) {
    private void printTestException(ref TestResult test) {
      auto diagnostic = test.throwable.msg.split("\n").map!(a => "# " ~ a).join("\n");

      auto msg = test.throwable.msg.split("\n")[0];

      writer.writeln(diagnostic, ReportWriter.Context._default);
      writer.writeln("  ---", ReportWriter.Context._default);
      writer.writeln("  message: '" ~ msg ~ "'", ReportWriter.Context._default);
      writer.writeln("  severity: " ~ test.status.to!string, ReportWriter.Context._default);
      writer.writeln("  location:", ReportWriter.Context._default);
      writer.writeln("    fileName: '" ~ test.throwable.file.replace("'", "\'") ~ "'", ReportWriter.Context._default);
      writer.writeln("    line: " ~ test.throwable.line.to!string, ReportWriter.Context._default);
    }
  }

  private void printThrowable(ref TestResult test) {
    writer.writeln("  ---", ReportWriter.Context._default);
    writer.writeln("  message: '" ~ test.throwable.msg ~ "'", ReportWriter.Context._default);
    writer.writeln("  severity: " ~ test.status.to!string, ReportWriter.Context._default);
    writer.writeln("  location:", ReportWriter.Context._default);
    writer.writeln("    fileName: '" ~ test.throwable.file.replace("'", "\'") ~ "'", ReportWriter.Context._default);
    writer.writeln("    line: " ~ test.throwable.line.to!string, ReportWriter.Context._default);
  }
}