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module trial.reporters.xunit;

import std.stdio;
import std.array;
import std.conv;
import std.datetime;
import std.string;
import std.algorithm;
import std.file;
import std.path;
import std.uuid;
import std.range;

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

private string escapeXUnit(string data) {
  string escapedData = data.dup;

  escapedData = escapedData.replace(`&`, `&`);
  escapedData = escapedData.replace(`"`, `"`);
  escapedData = escapedData.replace(`'`, `'`);
  escapedData = escapedData.replace(`<`, `<`);
  escapedData = escapedData.replace(`>`, `>`);

  return escapedData;
}


class XUnitReporter : ILifecycleListener
{

  private {
    immutable string destination;
  }

  this(string destination) {
    this.destination = destination;
  }

  void begin(ulong testCount) {
    if(exists(destination)) {
      std.file.rmdirRecurse(destination);
    }
  }

  void update() {}

  void end(SuiteResult[] result)
  {
    if(!exists(destination)) {
      destination.mkdirRecurse;
    }

    foreach(item; result) {
      string uuid = randomUUID.toString;
      string xml = `<?xml version="1.0" encoding="UTF-8"?>` ~ "\n"~ `<testsuites>` ~ "\n" ~ XUnitSuiteXml(item, uuid).toString ~ "\n</testsuites>\n";

      std.file.write(buildPath(destination, item.name ~ ".xml"), xml);
    }
  }
}

struct XUnitSuiteXml {

  SuiteResult result;


  string uuid;


  string toString() {
    auto epoch = SysTime.fromUnixTime(0);
    string tests = result.tests.map!(a => XUnitTestXml(a, uuid).toString).array.join("\n");


    auto failures = result.tests.filter!(a => a.status == TestResult.Status.failure).count;
    auto skipped = result.tests.filter!(a => a.status == TestResult.Status.skip).count;
    auto errors = result.tests.filter!(a =>
      a.status != TestResult.Status.success &&
      a.status != TestResult.Status.skip &&
      a.status != TestResult.Status.failure).count;

    if(tests != "") {
      tests = "\n" ~ tests;
    }

    auto xml = `  <testsuite name="` ~ result.name ~ `" errors="` ~ errors.to!string ~ `" skipped="` ~ skipped.to!string ~ `" tests="` ~ result.tests.length.to!string ~ `" failures="` ~ failures.to!string ~ `" time="0" timestamp="` ~ result.begin.toISOExtString ~ `">`
     ~ tests ~ `
  </testsuite>`;

    return xml;
  }
}






struct XUnitTestXml {

  TestResult result;


  string uuid;


  string toString() {
    auto time = (result.end -result.begin).total!"msecs";
    string xml = `      <testcase name="` ~ result.name.escapeXUnit ~ `">` ~ "\n";

    if(result.status == TestResult.Status.failure) {
      if(result.throwable !is null) {
        auto lines = result.throwable.msg.split("\n") ~ "no message";

        xml ~= `      <failure message="` ~ lines[0].escapeXUnit ~ `">` ~ result.throwable.to!string.escapeXUnit ~ `</failure>` ~ "\n";
      } else {
        xml ~= `      <failure/>` ~ "\n";
      }
    } else if(result.status == TestResult.Status.skip) {
      xml ~= `      <skipped/>` ~ "\n";
    } else if(result.status != TestResult.Status.success) {
        xml ~= `      <error message="unknown status">` ~ result.status.to!string.escapeXUnit ~ `</error>` ~ "\n";
    }

    xml ~= `      </testcase>`;

    return xml;
  }
}