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module trial.reporters.progress;

import std.stdio;
import std.array;
import std.conv;
import std.datetime;
import std.string;
import std.algorithm;

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


struct ProgressGlyphs {
  version(Windows) {
    string empty = ".";
    string fill = "#";
  } else {
    string empty = "░";
    string fill = "▓";
  }
}


string progressGlyphsToCode(ProgressGlyphs glyphs) {
  return "ProgressGlyphs(`" ~ glyphs.empty ~ "`,`" ~ glyphs.fill ~ "`)";
}


class ProgressReporter : ITestCaseLifecycleListener, ILifecycleListener
{
  private
  {
    ReportWriter writer;
    ProgressGlyphs glyphs;

    ulong testCount;
    ulong currentTest;
    bool success = true;
  }
  this(ProgressGlyphs glyphs)
  {
    writer = defaultWriter;
    this.glyphs = glyphs;
  }

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

  void begin(ulong testCount)
  {
    this.testCount = testCount;
    writer.writeln("");
    draw;
  }

  void update()
  {

  }

  void end(SuiteResult[])
  {

  }

  void begin(string suite, ref TestResult test)
  {
  }

  void end(string suite, ref TestResult test)
  {
    currentTest++;
    success = success && test.status == TestResult.Status.success;
    draw;
  }

  private void draw()
  {
    int size = min((writer.width / 4) * 3, testCount);
    size_t position = ((cast(double) currentTest / cast(double) testCount) * size).to!size_t;

    writer.goTo(1);

    writer.write(currentTest.to!string ~ "/" ~ testCount.to!string ~ " ",
        success ? ReportWriter.Context.active : ReportWriter.Context.danger);

    writer.write(glyphs.fill.replicate(position), ReportWriter.Context.active);
    writer.writeln(glyphs.empty.replicate(size - position), ReportWriter.Context.inactive);
  }
}