package main

import (
	"gioui.org/app"
	"gioui.org/io/event"
	"gioui.org/layout"
	"gioui.org/op"
	"gioui.org/widget"
	"gioui.org/widget/material"
	"git.mstar.dev/mstar/goutils/other"
	"github.com/rs/zerolog/log"
)

type StateEnterTime struct {
	initialSetupDone bool
	editor           *widget.Editor
	inputField       *material.EditorStyle
	ops              op.Ops
}

func (s *StateEnterTime) initialSetup(globalState *GlobalState) {
	s.editor = &widget.Editor{
		SingleLine: true,
		Submit:     true,
		Filter:     "01234567890TZ+-:",
	}
	field := material.Editor(globalState.Theme, s.editor, "timestamp")
	s.inputField = &field
	s.initialSetupDone = true
}

func (s *StateEnterTime) Run(globalState *GlobalState, event event.Event) NewState {
	if !s.initialSetupDone {
		s.initialSetup(globalState)
	}
	switch event := event.(type) {
	case app.FrameEvent:
		return s.handleFrameEvent(globalState, &event)
	case app.DestroyEvent:
		return s.handleQuitEvent()
	case app.WaylandViewEvent, app.X11ViewEvent:
		return EmptyEvent()
	default:
		log.Debug().Any("event", event).Type("type", event).Msg("Unknown event")
		return NewState{}
	}
}

func (s *StateEnterTime) handleFrameEvent(
	globalState *GlobalState,
	frameEvent *app.FrameEvent,
) NewState {
	gtx := app.NewContext(&s.ops, *frameEvent)
	for ev, ok := s.editor.Update(gtx); ok; ev, ok = s.editor.Update(gtx) {
		log.Debug().Any("Editor event", ev).Send()
	}
	label := material.H3(globalState.Theme, "Enter timestamp")
	hint := material.Subtitle1(
		globalState.Theme,
		"Format: <YYYY>-<MM>-<DD>T<hh>:<mm>:<ss>(Z|+<TZ>)",
	)
	list := layout.List{Axis: layout.Vertical}
	list.Layout(gtx, 3, func(gtx layout.Context, index int) layout.Dimensions {
		switch index {
		case 0:
			return label.Layout(gtx)
		case 1:
			return hint.Layout(gtx)
		case 2:
			return s.inputField.Layout(gtx)
		default:
			return hint.Layout(gtx)
		}
	})
	frameEvent.Frame(&s.ops)
	return NewState{}
}

func (s *StateEnterTime) handleQuitEvent() NewState {
	return NewState{ExitCode: other.IntoPointer(0)}
}