package main

import (
	"time"

	calendar "google.golang.org/api/calendar/v3"
)

type Calendar struct {
	AccessRole           string
	BackgroundColor      string
	ColorId              string
	DefaultReminders     []*calendar.EventReminder // TODO: Local Reminder struct?
	Deleted              bool
	Description          string
	Etag                 string
	ForegroundColor      string
	Hidden               bool
	Id                   string
	Kind                 string
	Location             string
	NotificationSettings *calendar.CalendarListEntryNotificationSettings // TODO: Needed?
	Primary              bool
	Selected             bool
	Summary              string
	SummaryOverride      string
	TimeZone             string
	ForceSendFields      []string // TODO: Needed?
	NullFields           []string //TODO: Needed?
}

func GoogleCalendarToLocal(c *calendar.CalendarListEntry) *Calendar {
	ret := Calendar{
		AccessRole:       c.AccessRole,
		BackgroundColor:  c.BackgroundColor,
		ColorId:          c.ColorId,
		DefaultReminders: c.DefaultReminders,
		Deleted:          c.Deleted,
		Description:      c.Description,
		Etag:             c.Etag,
		ForegroundColor:  c.ForegroundColor,
		Hidden:           c.Hidden,
		Id:               c.Id,
		Kind:             c.Kind,
		Location:         c.Location,
		Primary:          c.Primary,
		Selected:         c.Selected,
		Summary:          c.Summary,
		SummaryOverride:  c.SummaryOverride,
		TimeZone:         c.TimeZone,
	}
	return &ret
}

func (c *Calendar) GetTodaysEvents() []Event {
	var ret []Event

	minTime := time.Date(
		time.Now().Year(),
		time.Now().Month(),
		time.Now().Day(),
		0, 0, 0, 0, time.Local,
	)
	maxTime := time.Date(
		time.Now().Year(),
		time.Now().Month(),
		time.Now().Day(),
		23, 59, 59, 999999999, time.Local,
	)
	events, err := state.account.Service.Events.List(c.Id).
		ShowDeleted(false).
		SingleEvents(true).
		TimeMin(minTime.Format(time.RFC3339)).
		TimeMax(maxTime.Format(time.RFC3339)).
		OrderBy("startTime").
		Do()
	if err != nil {
		return ret
	}
	for _, e := range events.Items {
		// Check if this event is an all-day event and, if so, is it actually today?
		if _, err := time.Parse(time.RFC3339, e.Start.DateTime); err != nil {
			tz := time.Now().Local().Format("-07:00")
			stDt := e.Start.Date + "T00:00:00" + tz
			stTm, err := time.Parse(time.RFC3339, stDt)
			if err != nil {
				continue
			}
			endDt := e.End.Date + "T00:00:00" + tz
			endTm, err := time.Parse(time.RFC3339, endDt)
			if err != nil {
				continue
			}
			if stTm.After(maxTime) {
				continue
			}
			if stTm.After(maxTime) || endTm.Before(minTime) {
				continue
			}
		}
		ret = append(ret, *GoogleEventToLocalWithId(e, c.Id))
	}
	return ret
}

func (c *Calendar) GetCalendarEvents() []Event {
	var ret []Event
	events, err := state.account.Service.Events.List(c.Id).ShowDeleted(false).
		SingleEvents(true).OrderBy("startTime").Do()
	if err != nil {
		return ret
	}
	for _, e := range events.Items {
		ret = append(ret, *GoogleEventToLocalWithId(e, c.Id))
	}
	return ret
}

/* For Adding a private copy of an existing event
func (c *Calendar) ImportEvent(event *Event) error {
	_, err := state.account.Service.Events.Import(c.Id, event).Do()
	return err
}
*/
func (c *Calendar) InsertEvent(event *Event) (*Event, error) {
	e, err := state.account.Service.Events.Insert(c.Id, LocalEventToGoogle(event)).Do()
	return GoogleEventToLocal(e), err
}

func (c *Calendar) DeleteEvent(eId string) error {
	return state.account.Service.Events.Delete(c.Id, eId).Do()
}

func (c *Calendar) GetEvent(eId string) (*Event, error) {
	e, err := state.account.Service.Events.Get(c.Id, eId).Do()
	return GoogleEventToLocal(e), err
}

func (c *Calendar) QuickAdd(text string) (*Event, error) {
	e, err := state.account.Service.Events.QuickAdd(c.Id, text).Do()
	return GoogleEventToLocal(e), err
}

func (c *Calendar) Update(eId string, event *Event) (*Event, error) {
	e, err := state.account.Service.Events.Update(c.Id, eId, LocalEventToGoogle(event)).Do()
	return GoogleEventToLocal(e), err
}