package main

import (
	"bytes"
	"fmt"
	"os"

	"github.com/charmbracelet/bubbles/list"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/huh"
	"periodic/prddeploy/commands"
)

type appState int

const (
	stateList appState = iota
	stateForm
	stateOutput
)

type cmdResultMsg struct {
	output string
}

type CommandItem struct {
	ItemTitle       string `json:"title"`
	ItemDescription string `json:"description"`
}

func (i CommandItem) FilterValue() string { return i.ItemTitle }
func (i CommandItem) Title() string       { return i.ItemTitle }
func (i CommandItem) Description() string { return i.ItemDescription }
func (i CommandItem) String() string      { return i.ItemTitle }

type model struct {
	list   list.Model
	form   *huh.Form
	state  appState
	choice int
	output string

	RemoteCommand       string
	PrivateKeyFile      string
	Username            string
	Host                string
	LocalFilepath       string
	DestinationFilepath string

	CloudflareAPIToken string
	ZoneID             string
	RecordName         string
	RecordValue        string
}

func (m model) DebugState() {
	fmt.Printf("REMOTE COMMAND: %s\n", m.RemoteCommand)
	fmt.Printf("PRIVATE KEY FILE: %s\n", m.PrivateKeyFile)
	fmt.Printf("USERNAME: %s\n", m.Username)
	fmt.Printf("HOST: %s\n", m.Host)
	fmt.Printf("LOCAL FILEPATH: %s\n", m.LocalFilepath)
	fmt.Printf("DESTINATION FILEPATH: %s\n", m.DestinationFilepath)
}

func (m *model) ReadForm() {
	m.RemoteCommand = m.form.GetString("remote_command")
	m.PrivateKeyFile = m.form.GetString("private_key_file")
	m.Username = m.form.GetString("username")
	m.Host = m.form.GetString("host")
	m.LocalFilepath = m.form.GetString("local_filepath")
	m.DestinationFilepath = m.form.GetString("destination_filepath")
	m.CloudflareAPIToken = m.form.GetString("cloudflare_api_token")
	m.ZoneID = m.form.GetString("zone_id")
	m.RecordName = m.form.GetString("record_name")
	m.RecordValue = m.form.GetString("record_value")
}

func newModel() model {
	items := []list.Item{
		CommandItem{ItemTitle: "Run Command", ItemDescription: "Run a command on the remote host"},
		CommandItem{ItemTitle: "Upload File", ItemDescription: "Upload a file to the remote host"},
		CommandItem{ItemTitle: "SSL DNS Challenge", ItemDescription: "Set an _acme-challenge TXT record"},
	}
	l := list.New(items, list.NewDefaultDelegate(), 80, 20)
	l.Title = "Commands"
	return model{list: l, state: stateList}
}

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

func execCommand(choice int, m model) tea.Cmd {
	return func() tea.Msg {
		var buf bytes.Buffer
		var err error
		if choice == 0 {
			err = commands.RunCommand(commands.RunCommandArgs{
				RemoteCommand:  m.RemoteCommand,
				PrivateKeyFile: m.PrivateKeyFile,
				Username:       m.Username,
				Host:           m.Host,
			}, &buf, &buf)
		} else if choice == 1 {
			err = commands.UploadFile(commands.UploadFileArgs{
				LocalFilepath:       m.LocalFilepath,
				DestinationFilepath: m.DestinationFilepath,
				PrivateKeyFile:      m.PrivateKeyFile,
				Username:            m.Username,
				Host:                m.Host,
			}, &buf, &buf)
		} else {
			err = commands.SetAcmeRecord(commands.SetAcmeRecordArgs{
				APIToken:    m.CloudflareAPIToken,
				ZoneID:      m.ZoneID,
				RecordName:  m.RecordName,
				RecordValue: m.RecordValue,
			}, &buf, &buf)
		}
		if err != nil {
			fmt.Fprintf(&buf, "\nError: %v", err)
		}
		return cmdResultMsg{output: buf.String()}
	}
}

func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch m.state {
	case stateList:
		switch msg := msg.(type) {
		case tea.WindowSizeMsg:
			m.list.SetSize(msg.Width, msg.Height)
		case tea.KeyMsg:
			if msg.String() == "enter" {
				m.choice = m.list.Index()
				m.state = stateForm
				m.SetForm()
				return m, m.form.Init()
			}
		}
		var cmd tea.Cmd
		m.list, cmd = m.list.Update(msg)
		return m, cmd

	case stateForm:
		form, cmd := m.form.Update(msg)
		if f, ok := form.(*huh.Form); ok {
			m.form = f
		}
		if m.form.State == huh.StateCompleted {
			m.ReadForm()
			choice := m.choice
			m.form = nil
			m.state = stateOutput
			return m, execCommand(choice, m)
		}
		if m.form.State == huh.StateAborted {
			m.state = stateList
			m.form = nil
			return m, nil
		}
		return m, cmd

	case stateOutput:
		if _, ok := msg.(tea.KeyMsg); ok {
			m.state = stateList
			return m, nil
		}
	}

	switch msg := msg.(type) {
	case cmdResultMsg:
		m.output = msg.output
		m.state = stateOutput
	}

	return m, nil
}

func (m model) View() string {
	switch m.state {
	case stateList:
		return m.list.View()
	case stateForm:
		return m.form.View()
	case stateOutput:
		return m.output + "\n\nPress any key to return..."
	}
	return ""
}

func main() {
	p := tea.NewProgram(newModel(), tea.WithAltScreen())
	if _, err := p.Run(); err != nil {
		fmt.Fprintf(os.Stderr, "Error running program: %v\n", err)
		os.Exit(1)
	}
}