package app

import (
	"fmt"
	"os"
	"os/user"
	"path"
	"strconv"

	"git.sr.ht/~rockorager/vaxis"
	"git.tilde.town/nbsp/neofeels/ttbp"
	"git.tilde.town/nbsp/neofeels/ui"
)

type Delete struct {
	title string
	list  ui.List
	help  string
	posts []ttbp.Post
}

func NewDelete() *Delete {
	user, _ := user.Current()
	posts := ttbp.GetPostsForUser(user.Username)
	list := []string{}
	for _, post := range posts {
		list = append(list, fmt.Sprintf(
			"%s (%d words)",
			post.Date.Format("2006-01-02"),
			post.Words,
		))
	}

	return &Delete{
		title,
		ui.NewList(list),
		"↑↓/kj move  ↵ enter  q return",
		posts,
	}
}

func (delete *Delete) Event(state *ui.State, event vaxis.Event) (processed bool) {
	if key, ok := event.(vaxis.Key); ok && key.EventType == vaxis.EventPress {
		switch key.String() {
		case "Ctrl+c", "Ctrl+d":
			close(ui.Quit)
		case "Down", "j", "Ctrl+n":
			delete.list.Down()
		case "Up", "k", "Ctrl+p":
			delete.list.Up()
		case "End", "Shift+g":
			delete.list.End()
		case "Home", "g":
			delete.list.Home()
		case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9":
			i, _ := strconv.Atoi(key.String())
			delete.list.SetIndex(i)
		case "q", "h", "Left":
			ui.ViewChange <- NewManagement()
		case "Enter", "l", "Right":
			if len(delete.list.Items()) > 0 {
				delete.Confirmation(state, func() {
					os.Remove(path.Join(ttbp.PathUserEntries, delete.posts[delete.list.Index()].Date.Format("20060102.txt")))
				}, "feels deleted")
			}
		}
		processed = true
	}
	delete.Draw(state)
	return
}

func (delete *Delete) Draw(state *ui.State) {
	win := state.Window()
	win.New(win.Width/2-10, win.Height/2-8, 20, 5).Print(vaxis.Segment{Text: delete.title})
	delete.list.Draw(vaxis.Window{
		Vx:     win.Vx,
		Parent: nil,
		Column: win.Width/2 - 14,
		Row:    win.Height/2 - 2,
		Width:  28,
		Height: 10,
	})
	win.New(win.Width/2-15, win.Height/2+9, 30, 1).Print(vaxis.Segment{Text: delete.help})
}

func (delete *Delete) Confirmation(state *ui.State, action func(), message string) {
	delete.Draw(state)
	win := state.Window()
	win.New(win.Width/2-14, win.Height/2-2+delete.list.Index(), 28, 1).Print(vaxis.Segment{
		Text: "  are you sure?             ",
		Style: vaxis.Style{
			Foreground: vaxis.IndexColor(1),
			Attribute:  vaxis.AttrReverse,
		},
	})
	state.Render()
loop:
	for ev := range state.Events() {
		switch ev.(type) {
		case vaxis.Resize, vaxis.Redraw:
			delete.Draw(state)
			win.New(win.Width/2-14, win.Height/2-2+delete.list.Index(), 28, 1).Print(vaxis.Segment{
				Text: "  are you sure?             ",
				Style: vaxis.Style{
					Foreground: vaxis.IndexColor(1),
					Attribute:  vaxis.AttrReverse,
				},
			})
			state.Render()
		case vaxis.Key:
			switch ev.(vaxis.Key).String() {
			case "Enter", "l", "Right":
				action()
				delete.Draw(state)
				win.New(win.Width/2-14, win.Height/2-2+delete.list.Index(), 28, 1).Print(vaxis.Segment{
					Text: fmt.Sprintf("  %-26s", message),
					Style: vaxis.Style{
						Foreground: vaxis.IndexColor(1),
						Attribute:  vaxis.AttrReverse,
					},
				})
				state.Render()
				for ev := range state.Events() {
					switch ev.(type) {
					case vaxis.Resize, vaxis.Redraw:
						delete.Draw(state)
						win.New(win.Width/2-14, win.Height/2-2+delete.list.Index(), 28, 1).Print(vaxis.Segment{
							Text: fmt.Sprintf("  %26s", message),
							Style: vaxis.Style{
								Foreground: vaxis.IndexColor(1),
								Attribute:  vaxis.AttrReverse,
							},
						})
						state.Render()
					case vaxis.Key:
						if ev.(vaxis.Key).EventType == vaxis.EventPress {
							ui.ViewChange <- NewDelete()
							break loop
						}
					}
				}
			}
			break loop
		}
	}
}