package app

import (
	"fmt"
	"strconv"

	"git.sr.ht/~rockorager/vaxis"
	"git.sr.ht/~rockorager/vaxis/widgets/textinput"
	"git.tilde.town/nbsp/neofeels/config"
	"git.tilde.town/nbsp/neofeels/ui"
)

type Config struct {
	title        string
	list         ui.List
	help         string
	config       *config.Config
	descriptions []string
}

var configList = []string{
	"pager",
	"publish to html",
	"publish to gopher",
	"default to nopub",
	"default to html",
}

func NewConfig() *Config {
	cfg, err := config.Read()
	if err != nil {
		cfg = config.Default
	}
	return &Config{
		title,
		ui.NewList(configList, 0),
		"↑↓/kj move  ↵ enter  q return",
		cfg,
		[]string{
			`which pager do you want to use to display feels?

here you can add additional pre-processing to your pager. leaving this option
unset defaults to $PAGER, and if that isn't set, neofeels falls back to less.`,
			`do you want to publish your feels online?

if yes, your feels will be published to a directory of your choice in your
public_html. if not, your feels will only be readable from within the tilde.town
network. if you already have a publishing directory, i'll remove it for you
(don't worry, your written entries will still be saved!)`,
			`gopher is a pre-web technology that is text-oriented and primarily used to
share folders of your files with the world.

would you like to publish your feels to gopher?

entries you write will automatically get linked to ~/public_gopher/feels/,
including gophermap generation. files you manually delete will no longer be
visible from your gopherhole, and will be purged from your gophermap on your
next entry update.`,
			`should your posts automatically show up on your world-visible pages, such as
html and gopher? you can change this behaviour on a per-post basis after the
fact. changes to this setting will not be made retroactively.`,
			`should your posts automatically be parsed as html in the neofeels reader?
this is not related to the html publishing option, and only applies to the
terminal reader. you can change this behaviour on a per-post basis after the
fact. changes to this setting will not be made retroactively.`,
			`in which directory under public_html should your blog reside? for example,
"blog" will make it visible under https://tilde.town/~you/blog.`,
		},
	}
}

func (config *Config) 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":
			config.list.Down()
		case "Up", "k", "Ctrl+p":
			config.list.Up()
		case "End", "Shift+g":
			config.list.End()
		case "Home", "g":
			config.list.Home()
		case "0", "1":
			i, _ := strconv.Atoi(key.String())
			config.list.SetIndex(i)
		case "q", "h", "Left":
			ui.ViewChange <- NewMainMenu(6)
		case "Enter", "l", "Right", "Space":
			switch config.list.Index() {
			case 0:
				config.config.Pager = config.changePager(state)
			case 1:
				config.config.Publishing = !config.config.Publishing
			case 2:
				config.config.Gopher = !config.config.Gopher
			case 3:
				config.config.Nopub = !config.config.Nopub
			case 4:
				config.config.HTML = !config.config.HTML
			case 5:
				config.config.PublishDir = config.changePublishDir(state)
			}
			config.config.Write()
		}
		processed = true
	}
	config.Draw(state)
	return
}

func (config *Config) Draw(state *ui.State) {
	if config.config.Publishing {
		config.list.SetItems(append(configList, "html publish directory"))
	} else {
		config.list.SetItems(configList)
	}
	win := state.Window()
	win.New(win.Width/2-10, win.Height/2-8, 20, 5).Print(vaxis.Segment{Text: config.title})
	config.list.Draw(vaxis.Window{
		Vx:     win.Vx,
		Parent: nil,
		Column: win.Width/2 - 21,
		Row:    win.Height/2 - 2,
		Width:  28,
		Height: 6,
	})
	win.New(win.Width/2-40, win.Height/2+5, 80, 10).Print(vaxis.Segment{Text: config.descriptions[config.list.Index()]})
	win.New(win.Width/2-15, win.Height/2+15, 30, 1).Print(vaxis.Segment{Text: config.help})

	// drawing the current selected options
	win.New(win.Width/2+7, win.Height/2-2, 40, 1).Print(vaxis.Segment{Text: fmt.Sprintf("  %-12v", config.config.Pager)})
	win.New(win.Width/2+7, win.Height/2-1, 14, 1).Print(vaxis.Segment{Text: fmt.Sprintf("  %-12v", config.config.Publishing)})
	win.New(win.Width/2+7, win.Height/2, 14, 1).Print(vaxis.Segment{Text: fmt.Sprintf("  %-12v", config.config.Gopher)})
	win.New(win.Width/2+7, win.Height/2+1, 14, 1).Print(vaxis.Segment{Text: fmt.Sprintf("  %-12v", config.config.Nopub)})
	win.New(win.Width/2+7, win.Height/2+2, 14, 1).Print(vaxis.Segment{Text: fmt.Sprintf("  %-12v", config.config.HTML)})
	if config.config.Publishing {
		win.New(win.Width/2+7, win.Height/2+3, 14, 1).Print(vaxis.Segment{Text: fmt.Sprintf("  %-12v", config.config.PublishDir)})
	}
}

func (config *Config) changePublishDir(state *ui.State) string {
	ti := textinput.New()
	ti.SetContent(config.config.PublishDir)
	config.Draw(state)
	win := state.Window()
	ti.Draw(vaxis.Window{
		Vx:     win.Vx,
		Parent: &win,
		Column: win.Width/2 + 9,
		Row:    win.Height/2 + 2,
		Width:  12,
		Height: 1,
	})
	for ev := range win.Vx.Events() {
		switch ev := ev.(type) {
		case vaxis.Key:
			switch ev.String() {
			case "Ctrl+c", "Esc", "Enter":
				state.HideCursor()
				return ti.String()
			}
		}
		ti.Update(ev)
		config.Draw(state)
		ti.Draw(vaxis.Window{
			Vx:     win.Vx,
			Parent: nil,
			Column: win.Width/2 + 9,
			Row:    win.Height/2 + 2,
			Width:  12,
			Height: 1,
		})
		state.Render()
	}

	return ""
}

func (config *Config) changePager(state *ui.State) string {
	ti := textinput.New()
	ti.SetContent(config.config.Pager)
	config.Draw(state)
	win := state.Window()
	ti.Draw(vaxis.Window{
		Vx:     win.Vx,
		Parent: &win,
		Column: win.Width/2 + 9,
		Row:    win.Height/2 - 2,
		Width:  40,
		Height: 1,
	})
	for ev := range win.Vx.Events() {
		switch ev := ev.(type) {
		case vaxis.Key:
			switch ev.String() {
			case "Ctrl+c", "Esc", "Enter":
				state.HideCursor()
				return ti.String()
			}
		}
		ti.Update(ev)
		config.Draw(state)
		ti.Draw(vaxis.Window{
			Vx:     win.Vx,
			Parent: nil,
			Column: win.Width/2 + 9,
			Row:    win.Height/2 - 2,
			Width:  40,
			Height: 1,
		})
		state.Render()
	}

	return ""
}