package main

import (
	"fmt"
	"gemini_site/gemlog"
	"os"

	tea "github.com/charmbracelet/bubbletea"
)

type Action string

const (
	Write  Action = "write"
	Read   Action = "read"
	Edit   Action = "edit"
	Delete Action = "delete"
)

type ActionCallback func() error

var callbacks = map[Action]ActionCallback{
	Write:  gemlog.WriteAction,
	Read:   func() error { return fmt.Errorf("not implmented") },
	Edit:   func() error { return nil },
	Delete: func() error { return nil },
}

type model struct {
	cursor   int
	actions  []Action
	errorTxt string
}

func initialModel() model {
	return model{
		actions: []Action{Write, Read, Edit, Delete},
	}
}

func (m model) Init() tea.Cmd {
	return tea.SetWindowTitle("Gemlog CLI")
}

func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.KeyMsg:
		switch msg.String() {
		case "ctrl+c", "q":
			return m, tea.Quit
		case "up", "k":
			if m.cursor > 0 {
				m.cursor--
			}
		case "down", "j":
			if m.cursor < len(m.actions)-1 {
				m.cursor++
			}
		case "enter", " ":
			err := callbacks[m.actions[m.cursor]]()
			if err == nil {
				return m, tea.Quit
			}
			m.errorTxt = "problem running action\n\nerror:\n"
			m.errorTxt += fmt.Sprintf("Error: %v\n", err)
			return m, nil
		}
	}

	return m, nil
}

func (m model) View() string {
	if len(m.errorTxt) > 0 {
		return m.errorTxt
	}
	s := "Welcome to gemlog cli!\n\nWhat post action would you like to take?\n\n"

	for i, action := range m.actions {
		cursor := " "
		if m.cursor == i {
			cursor = ">"
		}
		s += fmt.Sprintf("%s %s\n", cursor, action)
	}

	s += "\nPress q to quit.\n"

	return s
}

func main() {
	p := tea.NewProgram(initialModel())
	if _, err := p.Run(); err != nil {
		fmt.Printf("Alas, there's been an error: %v", err)
		os.Exit(1)
	}
}