#include <iomanip>

#include <ical/Event.h>
#include <ical/Alarm.h>

#include <db/db.h>


namespace ical {
  uint32_t date_to_epoch(const std::string &dt) {
    //TODO somewhat hacky as libical should be able to provide us with correct timezone/daylight offsets....
    std::tm t = {};
    std::istringstream ss(dt);
    if (ss >> std::get_time(&t, "%Y%m%dT%H%M%S"))
    {
      time_t     temp1  = mktime(&t);
      struct tm* temp2  = gmtime(&temp1);
      return mktime(temp2);
    }
    else
    {
      std::cout << "Parse failed\n";
      return -1;
    }
  }
  Event::Event(icalcomponent* event_component) {
    parse(event_component);
  }

  void Event::parse(icalcomponent* event_component) {
    uid = icalcomponent_get_uid(event_component);
    dtstart = date_to_epoch(icaltime_as_ical_string(icalcomponent_get_dtstart(event_component)));
    dtend =   date_to_epoch(icaltime_as_ical_string(icalcomponent_get_dtend(event_component)));
    summary = std::string(icalcomponent_get_summary(event_component));
    parse_alarms(event_component);
  }

  void Event::parse_alarms(icalcomponent* event_component) {
    icalcomponent* c;
    for(c = icalcomponent_get_first_component(event_component, ICAL_VALARM_COMPONENT);
        c != 0;
        c = icalcomponent_get_next_component(event_component, ICAL_VALARM_COMPONENT))
    {
      alarms.push_back(Alarm(c, dtstart));
    }
  }

  std::string Event::get_uid() const {
    return uid;
  }

  std::string Event::get_summary() const {
    return summary;
  }

  uint32_t Event::get_dtstart() const {
    return dtstart;
  }

  uint32_t Event::get_dtend() const {
    return dtend;
  }

  std::vector<Alarm> Event::get_alarms() const {
    return alarms;
  }

  std::vector<std::string> Event::get_db_row() const {
    return {db_safe(uid),
            db_safe(summary),
            db_safe(std::to_string(dtstart)),
            db_safe(std::to_string(dtend))};
  }

  std::string Event::print() const {
    std::string s = "";
    s += "UID:     " + uid + "\n";
    s += "DTSTART: " + std::to_string(dtstart) + "\n";
    s += "DTEND:   " + std::to_string(dtend) + "\n";
    s += "SUMMARY: " + summary + "\n";
    s += std::to_string(alarms.size()) + " ALARMS:\n";
    for(auto const& a : alarms) {
      s += a.print();
    }
    return s;
  }
}