package screens

import (
	"fmt"
	"io"

	"git.ohea.xyz/cursorius/tui/settings"
	"git.ohea.xyz/golang/config"
	"github.com/charmbracelet/bubbles/list"
	"github.com/charmbracelet/bubbles/textinput"
	tea "github.com/charmbracelet/bubbletea"
)

type EditServer struct {
	entries list.Model
	config  config.Config[settings.Config]
	pos     int
}

type entryItem struct {
	field textinput.Model
}

type submitItem struct {
	text string
}

func (i entryItem) FilterValue() string  { return "" }
func (i submitItem) FilterValue() string { return "" }

func (m EditServer) Init() tea.Cmd {
	return nil
}

type editServerDelegate struct{}

func (d editServerDelegate) Height() int                               { return 1 }
func (d editServerDelegate) Spacing() int                              { return 0 }
func (d editServerDelegate) Update(msg tea.Msg, m *list.Model) tea.Cmd { return nil }
func (d editServerDelegate) Render(w io.Writer, m list.Model, index int, listItem list.Item) {
	var str string
	switch i := listItem.(type) {
	case entryItem:
		str = i.field.View()
	case submitItem:
		str = i.text
	}

	fn := itemStyle.Render
	if index == m.Index() {
		fn = func(s string) string {
			return selectedItemStyle.Render("> " + s)
		}
	}

	fmt.Fprint(w, fn(str))
}

func (m EditServer) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmd tea.Cmd

	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		h, v := appStyle.GetFrameSize()
		m.entries.SetSize(msg.Width-h, msg.Height-v)
	case tea.KeyMsg:
		switch msg.String() {
		case "enter":
			name := ""
			url := ""
			token := ""
			if e, ok := m.entries.Items()[0].(entryItem); ok {
				name = e.field.Value()
			}
			if e, ok := m.entries.Items()[1].(entryItem); ok {
				url = e.field.Value()
			}
			if e, ok := m.entries.Items()[2].(entryItem); ok {
				token = e.field.Value()
			}

			newServer := settings.CursoriusServer{
				Name:  name,
				Url:   url,
				Token: token,
			}
			m.config.Config.Servers[m.pos] = newServer
			m.config.Write()
			return m, func() tea.Msg {
				return ScreenSwitchMsg{
					NewScreen: CreateLogin(m.config),
				}
			}
		}
	}

	m.entries, cmd = m.entries.Update(msg)

	items := m.entries.Items()
	for i := 0; i < len(items); i++ {
		if e, ok := items[i].(entryItem); ok {
			if i == m.entries.Index() {
				e.field.Focus()
			} else {
				e.field.Blur()
			}
			e.field, _ = e.field.Update(msg)
			m.entries.SetItem(i, e)
		}
	}

	return m, cmd
}

func (m EditServer) View() string {
	return m.entries.View()
}

func createEditServer(conf config.Config[settings.Config], pos int) EditServer {
	nameField := textinput.New()
	nameField.Focus()
	nameField.Width = 20
	nameField.Prompt = "Name:  "
	nameField.Placeholder = "Nickname"
	nameField.SetValue(conf.Config.Servers[pos].Name)
	urlField := textinput.New()
	urlField.Prompt = "Url:   "
	urlField.Placeholder = "https://ci.cursorius.ohea/"
	urlField.SetValue(conf.Config.Servers[pos].Url)
	tokenField := textinput.New()
	tokenField.Prompt = "Token: "
	tokenField.Placeholder = "1234567890"
	tokenField.SetValue(conf.Config.Servers[pos].Token)
	tokenField.EchoMode = textinput.EchoPassword
	items := []list.Item{
		entryItem{field: nameField},
		entryItem{field: urlField},
		entryItem{field: tokenField},
		submitItem{text: "> Submit <"},
	}
	l := list.New(items, editServerDelegate{}, 50, 50)
	l.Title = "Entry your Cursorius Server configuration."
	l.SetShowStatusBar(false)
	l.KeyMap.GoToStart.SetEnabled(false)
	l.KeyMap.GoToEnd.SetEnabled(false)
	l.KeyMap.CursorDown.SetKeys(append(l.KeyMap.CursorDown.Keys(), "tab")...)
	l.KeyMap.Filter.SetEnabled(false)
	l.KeyMap.Quit.SetEnabled(false)
	e := EditServer{
		entries: l,
		config:  conf,
		pos:     pos,
	}
	return e
}