package ui

import (
	"fmt"
	"strings"
	"time"

	"git.bullercodeworks.com/brian/gime/util"
	"git.bullercodeworks.com/brian/go-timertxt"
	"git.bullercodeworks.com/brian/wandle"
	"git.bullercodeworks.com/brian/widdles"
	"github.com/nsf/termbox-go"
)

type listTimersScreen struct {
	ui *Ui

	initialized bool
	menu        *widdles.TopMenu
	scrollbar   *widdles.Scrollbar

	cursor int

	timerList *timertxt.TimerList
	doneList  *timertxt.TimerList

	timerFilterList *timertxt.TimerList
	doneFilterList  *timertxt.TimerList

	filter string

	msg string
	err error
}

type ListTimersMsg ScreenMsg

func NewListTimersScreen(u *Ui) *listTimersScreen {
	w, h := termbox.Size()
	s := listTimersScreen{
		ui:        u,
		menu:      widdles.NewTopMenu(0, 0, 0),
		scrollbar: widdles.NewScrollbar(w-2, 2, 1, h-2),
	}
	return &s
}

func (s *listTimersScreen) Init() wandle.Cmd {
	if s.initialized {
		return nil
	}
	s.initialized = true
	// Set up the top menu
	fileMenu := s.menu.NewSubMenu("File")
	settingsOption := widdles.NewMenuItem("Settings")
	settingsOption.SetCommand(s.ui.GotoScreen(SettingsId))
	fileMenu.AddOption(settingsOption)
	quitOption := widdles.NewMenuItem("Quit")
	quitOption.Hotkey = termbox.KeyCtrlC
	quitOption.SetCommand(func() wandle.Msg { return wandle.Quit() })
	fileMenu.AddOption(quitOption)
	s.menu.Measure()
	// Timer Lists
	s.timerList, s.doneList = s.ui.program.TimerList, s.ui.program.DoneList
	s.timerFilterList, s.doneFilterList = s.timerList, s.doneList
	s.timerFilterList.Sort(timertxt.SORT_START_DATE_DESC)
	s.doneFilterList.Sort(timertxt.SORT_START_DATE_DESC)

	return nil
}

func (s *listTimersScreen) Update(msg wandle.Msg) wandle.Cmd {
	switch msg := msg.(type) {
	case ScreenMsg:
	case termbox.Event:
		return s.handleTermboxEvent(msg)
	}
	return nil
}

func (s *listTimersScreen) View(style wandle.Style) {
	_, h := termbox.Size()
	if s.menu.IsActive() {
		s.menu.View(style)
	}
	y := 2
	wandle.Print(1, y, style.Bold(true), "Active Timers")
	y++
	for idx, tmr := range s.timerFilterList.GetTimerSlice() {
		if y > h-2 {
			break
		}
		st := style
		if s.cursor == idx {
			st = st.Invert()
		}
		wandle.Print(1, y, st, "[ ]")
		s.ViewTimer(5, y, st, tmr)
		y++
	}
	y++
	wandle.Print(1, y, style.Bold(true), "Done Timers")
	y++
	for idx, tmr := range s.doneFilterList.GetTimerSlice() {
		if y > h-2 {
			break
		}
		st := style
		if s.cursor == s.timerFilterList.Size()+idx {
			st = st.Invert()
		}
		wandle.Print(1, y, st, "[ ]")
		s.ViewTimer(5, y, st, tmr)
		y++
	}

	s.scrollbar.View(style)
}

func (s *listTimersScreen) ViewTimer(x, y int, style wandle.Style, tmr *timertxt.Timer) {
	var tags []string
	for _, k := range util.SortedTagKeyList(tmr.AdditionalTags) {
		tags = append(tags, fmt.Sprintf("%s:%s", k, tmr.AdditionalTags[k]))
	}

	wandle.Print(x, y, style, fmt.Sprintf("%s %s %s %s %s", tmr.StartDate.Format(time.Stamp), tmr.Duration(), tmr.Contexts, tmr.Projects, strings.Join(tags, "; ")))
}

func (s *listTimersScreen) handleTermboxEvent(msg termbox.Event) wandle.Cmd {
	if (msg.Type == termbox.EventKey && msg.Key == termbox.KeyEsc) || s.menu.IsActive() {
		return s.menu.Update(msg)
	}
	switch msg.Type {
	case termbox.EventKey:
		top := s.timerFilterList.Size() + s.doneFilterList.Size() - 2
		if msg.Key == termbox.KeyEnter {
			/*
				if s.cursor >= 0 && s.cursor < s.timerFilterList.Size()+s.doneFilterList.Size() {
				} else {
				}
			*/
		} else if msg.Key == termbox.KeyArrowUp || msg.Ch == 'k' {
			if s.cursor > 0 {
				s.cursor--
			} else {
				s.cursor = 0
			}
			return nil
		} else if msg.Key == termbox.KeyArrowDown || msg.Ch == 'j' {
			if s.cursor < top {
				s.cursor++
			} else {
				s.cursor = top
			}
			return nil
		} else if msg.Ch == 'G' {
			s.cursor = top
		}
	}
	return nil
}

func (s *listTimersScreen) gotoSettingsScreen() wandle.Msg {
	return ScreenMsg{
		source:  ListTimersId,
		command: CmdGotoSettings,
	}
}