package app

import (
	"strconv"

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

type Subscriptions struct {
	title         string
	list          ui.List
	help          string
	neighbors     []ttbp.User
	subscriptions *ttbp.Subscriptions
}

func NewSubscriptions() *Subscriptions {
	users := ttbp.SortUsersByRecent(ttbp.GetUsers())
	subscriptions := ttbp.GetSubscriptions()
	list := []string{}
	neighbors := []ttbp.User{}
	for _, user := range users {
		if subscriptions.IsSubscribed(user) {
			list = append(list, formatNeighbor(user, subscriptions))
			neighbors = append(neighbors, user)
		}
	}

	return &Subscriptions{
		title,
		ui.NewList(list),
		"↑↓/kj move  ↵ enter  s subscribe  q return",
		neighbors,
		subscriptions,
	}
}

func (subscriptions *Subscriptions) 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":
			subscriptions.list.Down()
		case "Up", "k", "Ctrl+p":
			subscriptions.list.Up()
		case "End", "Shift+g":
			subscriptions.list.End()
		case "Home", "g":
			subscriptions.list.Home()
		case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9":
			i, _ := strconv.Atoi(key.String())
			subscriptions.list.SetIndex(i)
		case "q", "h", "Left":
			subscriptions.subscriptions.Write()
			ui.ViewChange <- NewMainMenu()
		case "s":
			if len(subscriptions.list.Items()) > 0 {
				user := subscriptions.neighbors[subscriptions.list.Index()]
				if subscriptions.subscriptions.IsSubscribed(user) {
					subscriptions.subscriptions.Unsubscribe(user)
				} else {
					subscriptions.subscriptions.Subscribe(user)
				}
				subscriptions.list.SetItem(subscriptions.list.Index(), formatNeighbor(user, subscriptions.subscriptions))
			}
		case "Enter", "l", "Right":
			if len(subscriptions.list.Items()) > 0 {
				subscriptions.subscriptions.Write()
				ui.ViewChange <- NewUserPage(subscriptions.neighbors[subscriptions.list.Index()].Name)
			}
		}
		processed = true
	}
	subscriptions.Draw(state)
	return
}

func (subscriptions *Subscriptions) Draw(state *ui.State) {
	win := state.Window()
	win.New(win.Width/2-10, win.Height/2-8, 20, 5).Print(vaxis.Segment{Text: subscriptions.title})
	subscriptions.list.Draw(vaxis.Window{
		Vx:     win.Vx,
		Parent: nil,
		Column: win.Width/2 - 40,
		Row:    win.Height/2 - 2,
		Width:  80,
		Height: 10,
	})
	if len(subscriptions.list.Items()) == 0 {
		win.New(win.Width/2-22, win.Height/2-1, 44, 2).Print(vaxis.Segment{Text: "no subscriptions yet\nvisit your neighbors to subscribe to them!"})
	}
	win.New(win.Width/2-22, win.Height/2+9, 44, 1).Print(vaxis.Segment{Text: subscriptions.help})
}