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module trial.reporters.specprogress;

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

import trial.interfaces;
import trial.reporters.writer;
import trial.reporters.stats;
import trial.reporters.spec;




class SpecProgressReporter : SpecReporter, ISuiteLifecycleListener, ILifecycleListener {
  private {
    alias UpdateFunction = void delegate(CueInfo info);

    struct CueInfo {
      string id;
      string name;
      long duration;
      SysTime begin;
    }

    size_t oldTextLength;
    StatStorage storage;
    string[] path;

    CueInfo[] cues;
  }

  this(StatStorage storage) {
    super();
    this.storage = storage;
    writer.writeln("");
  }

  this(ReportWriter writer, StatStorage storage) {
    super(writer);
    this.storage = storage;
    writer.writeln("");
  }

  void clearProgress() {
    writer.goTo(1);
    writer.write("\n" ~ " ".replicate(oldTextLength));
    writer.goTo(1);
    oldTextLength = 0;
  }

  void begin(ulong) {}
  void end(SuiteResult[]) {}
  void update() {
    writer.hideCursor;
    auto now = Clock.currTime;
    auto progress = cues.map!(cue => "*[" ~ (cue.duration - (now - cue.begin).total!"seconds").to!string ~ "s]" ~ cue.name).join(" ").to!string;

    auto spaces = "";

    if(oldTextLength > progress.length) {
      spaces = " ".replicate(oldTextLength - progress.length);
    }

    writer.goTo(1);
    writer.write("\n" ~ progress ~ spaces ~ " ");

    oldTextLength = progress.length;
    writer.showCursor;
  }

  void removeCue(string id) {
    cues = cues.filter!(a => a.id != id).array;
  }

  void begin(ref SuiteResult suite) {
    auto stat = storage.find(suite.name);
    auto duration = (stat.end - stat.begin).total!"seconds";

    cues ~= CueInfo(suite.name, suite.name, duration, Clock.currTime);
    update;
  }

  void end(ref SuiteResult suite) {
    removeCue(suite.name);
    update;
  }

  override {
    void begin(string suite, ref TestResult test) {
      super.begin(suite, test);

      auto stat = storage.find(suite ~ "." ~ test.name);
      auto duration = (stat.end - stat.begin).total!"seconds";

      cues ~= CueInfo(suite ~ "." ~ test.name, test.name, duration, Clock.currTime);
      update;
    }

    void end(string suite, ref TestResult test) {
      clearProgress;
      super.end(suite, test);
      removeCue(suite ~ "." ~ test.name);
      writer.writeln("");
      update;
    }
  }
}