package root

import (
	"github.com/ayn2op/discordo/internal/config"
	"github.com/ayn2op/discordo/internal/consts"
	"github.com/ayn2op/discordo/internal/ui/chat"
	"github.com/ayn2op/discordo/internal/ui/login"
	"github.com/ayn2op/tview"
	"github.com/ayn2op/tview/keybind"
	"github.com/gdamore/tcell/v3"
)

const tokenEnvVarKey = "DISCORDO_TOKEN"

type View struct {
	app   *tview.Application
	inner tview.Primitive
	cfg   *config.Config
}

func NewView(cfg *config.Config, app *tview.Application) *View {
	return &View{
		app: app,
		cfg: cfg,
	}
}

func (v *View) showLoginView() tview.Command {
	v.inner = login.NewForm(v.app, v.cfg)
	return v.inner.HandleEvent(tview.NewInitEvent())
}

func (v *View) showChatView(token string) tview.Command {
	v.inner = chat.NewView(v.app, v.cfg, token)
	return v.inner.HandleEvent(tview.NewInitEvent())
}

var _ tview.Primitive = (*View)(nil)

func (v *View) Draw(screen tcell.Screen) {
	if v.inner != nil {
		v.inner.Draw(screen)
	}
}

func (v *View) HandleEvent(event tcell.Event) tview.Command {
	switch event := event.(type) {
	case *tview.InitEvent:
		return tview.BatchCommand{
			tview.SetTitleCommand(consts.Name),
			tview.EventCommand(initClipboard),
			tview.EventCommand(getToken),
		}
	case *tokenEvent:
		if event.token == "" {
			return tview.BatchCommand{v.showLoginView(), tview.SetFocusCommand{Target: v.inner}}
		} else {
			return tview.BatchCommand{v.showChatView(event.token), tview.SetFocusCommand{Target: v.inner}}
		}
	case *login.TokenEvent:
		return tview.BatchCommand{v.showChatView(event.Token), tview.SetFocusCommand{Target: v.inner}}
	case *chat.LogoutEvent:
		v.showLoginView()
		return tview.BatchCommand{
			tview.EventCommand(deleteToken),
			tview.SetFocusCommand{Target: v.inner},
		}

	case *tview.KeyEvent:
		switch {
		case keybind.Matches(event, v.cfg.Keybinds.Suspend.Keybind):
			v.suspend()
			return nil
		case keybind.Matches(event, v.cfg.Keybinds.Quit.Keybind):
			if v.inner != nil {
				return v.inner.HandleEvent(chat.NewQuitEvent())
			}
			return tview.QuitCommand{}
		}
	}

	if v.inner != nil {
		return v.inner.HandleEvent(event)
	}
	return nil
}

func (v *View) GetRect() (int, int, int, int) {
	if v.inner != nil {
		return v.inner.GetRect()
	}
	return 0, 0, 0, 0
}

func (v *View) SetRect(x int, y int, width int, height int) {
	if v.inner != nil {
		v.inner.SetRect(x, y, width, height)
	}
}

func (v *View) Focus(delegate func(p tview.Primitive)) {
	if v.inner != nil {
		delegate(v.inner)
	}
}

func (v *View) HasFocus() bool {
	if v.inner != nil {
		return v.inner.HasFocus()
	}
	return true
}

func (v *View) Blur() {
	if v.inner != nil {
		v.inner.Blur()
	}
}