package shared

import (
	tea "github.com/charmbracelet/bubbletea"
)

// An analogue to tea.Model with support for checking if the model has been
// initialized before
type ViewModel interface {
	Init() tea.Cmd
	Update(tea.Msg) (ViewModel, tea.Cmd)
	View() string
	Initialized() bool // Return whether this view is initialized
}

type ViewState struct {
	Initialized bool
	Width  int
	Height int
	Err    error
}

type View int

const (
	ViewChat View = iota
	ViewConversations
	//StateSettings
	//StateHelp
)

// a convenience struct for holding rendered content for indiviudal UI
// elements
type Sections struct {
	Header  string
	Content string
	Error   string
	Input   string
	Footer  string
}

type (
	// send to change the current state
	MsgViewChange View
	// sent to a state when it is entered
	MsgViewEnter struct{}
	// sent when an error occurs
	MsgError error
	// sent when the view has handled a key input
	MsgKeyHandled tea.KeyMsg
)

func ViewEnter() tea.Cmd {
	return func() tea.Msg {
		return MsgViewEnter{}
	}
}

func KeyHandled(key tea.KeyMsg) tea.Cmd {
	return func() tea.Msg {
		return MsgKeyHandled(key)
	}
}

func WrapError(err error) tea.Cmd {
	return func() tea.Msg {
		return MsgError(err)
	}
}