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use chrono::NaiveDate;
use std::ffi::CStr;
use std::fmt;

use super::component::IcalComponent;
use crate::ical;

pub struct IcalProperty<'a> {
  pub ptr: *mut ical::icalproperty,
  _parent: &'a dyn IcalComponent,
}

impl<'a> Drop for IcalProperty<'a> {
  fn drop(&mut self) {
    unsafe {
      ical::icalproperty_free(self.ptr);
    }
  }
}

impl<'a> fmt::Debug for IcalProperty<'a> {
  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    write!(f, "{}", self.as_ical_string())
  }
}

impl<'a> IcalProperty<'a> {
  pub fn from_ptr(ptr: *mut ical::icalproperty, parent: &'a dyn IcalComponent) -> Self {
    IcalProperty { ptr, _parent: parent }
  }

  pub fn get_name(&self) -> String {
    unsafe {
      let cstr = CStr::from_ptr(ical::icalproperty_get_property_name(self.ptr));
      cstr.to_string_lossy().into_owned()
    }
  }

  pub fn get_value(&self) -> String {
    unsafe {
      let cstr = CStr::from_ptr(ical::icalproperty_get_value_as_string(self.ptr));
      cstr.to_string_lossy().into_owned()
    }
  }

  pub fn as_ical_string(&self) -> String {
    unsafe {
      let cstr = CStr::from_ptr(ical::icalproperty_as_ical_string(self.ptr));
      cstr.to_string_lossy().trim().to_owned()
    }
  }

  pub fn get_value_as_date(&self) -> Option<NaiveDate> {
    unsafe {
      let date = ical::icaltime_from_string(ical::icalproperty_get_value_as_string(self.ptr));
      NaiveDate::from_ymd_opt(date.year, date.month as u32, date.day as u32)
    }
  }
}