package main

import (
	"strings"
	"time"

	timertxt "git.bullercodeworks.com/brian/go-timertxt"
)

func (a *AppState) getMostRecentTimer() (*timertxt.Timer, error) {
	wrk, err := a.TimerList.GetMostRecentTimer()
	if err != nil {
		// Couldn't find a timer in the 'timer.txt'... Check the 'done' file
		if err = a.LoadDoneList(); err != nil {
			return nil, err
		}

		wrk, err = a.DoneList.GetMostRecentTimer()
		if err != nil {
			return nil, err
		}
	}
	return wrk, nil
}

func (a *AppState) SetTimerFinished(id int, end time.Time) error {
	var t *timertxt.Timer
	var err error
	if t, err = a.TimerList.GetTimer(id); err != nil {
		return err
	}
	t.FinishDate = end
	t.Finished = true
	return nil
}

func (a *AppState) addTimer(timerString string) error {
	t, err := timertxt.ParseTimer(timerString)
	if err != nil {
		return err
	}
	if t.StartDate.IsZero() {
		t.StartDate = time.Now()
	}
	a.TimerList.AddTimer(t)
	return a.WriteList()
}

func (a *AppState) archiveTimer(id int) error {
	var err error
	var timer *timertxt.Timer
	if timer, err = a.TimerList.GetTimer(id); err != nil {
		return err
	}
	if err := a.TimerList.ArchiveTimerToFile(*timer, app.getDoneFile()); err != nil {
		return err
	}
	a.TimerList.RemoveTimer(*timer)
	return a.WriteList()
}

func (a *AppState) unarchiveTimer(id int) error {
	var err error
	var timer *timertxt.Timer
	if timer, err = a.DoneList.GetTimer(id); err != nil {
		return err
	}
	a.TimerList.AddTimer(timer)
	if err = a.WriteList(); err != nil {
		return err
	}
	a.DoneList.RemoveTimer(*timer)
	return a.WriteDoneList()
}

func (a *AppState) LoadTimerList() error {
	var err error
	var tl timertxt.TimerList
	tl, err = timertxt.LoadFromFilename(a.getTimerFile())
	tl.Sort(timertxt.SORT_UNFINISHED_START)
	a.TimerList = &tl
	return err
}

func (a *AppState) WriteList() error {
	return a.TimerList.WriteToFilename(a.getTimerFile())
}

func (a *AppState) LoadDoneList() error {
	var err error
	var tl timertxt.TimerList
	tl, err = timertxt.LoadFromFilename(a.getDoneFile())
	a.DoneList = &tl
	return err
}

func (a *AppState) WriteDoneList() error {
	return a.DoneList.WriteToFilename(a.getDoneFile())
}

func (a *AppState) getFilterPredicate(filter string) func(timertxt.Timer) bool {
	var predicates []func(timertxt.Timer) bool
	// If none of the 'filter' is in upper-case, do a case-insensitive filter
	checkCase := true
	if strings.ToLower(filter) == filter {
		checkCase = false
	}
	filterParts := strings.Split(filter, " ")
	for _, part := range filterParts {
		if strings.HasPrefix(part, "@") {
			predicates = append(predicates, func(t timertxt.Timer) bool {
				for _, v := range t.Contexts {
					if "@"+v == part {
						return true
					}
				}
				return false
			})
		} else if strings.HasPrefix(part, "+") {
			predicates = append(predicates, func(t timertxt.Timer) bool {
				for _, v := range t.Projects {
					if "+"+v == part {
						return true
					}
				}
				return false
			})
		} else {
			predicates = append(predicates, func(t timertxt.Timer) bool {
				val := t.Original
				if !checkCase {
					val = strings.ToLower(t.Original)
				}
				return strings.Contains(val, part)
			})
		}
	}
	return func(t timertxt.Timer) bool {
		for _, v := range predicates {
			if v(t) {
				return true
			}
		}
		return false
	}
}