package app

import (
	"docker-tui/views"

	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
	"github.com/lucasdataproyects/devfactory/tui"
)

type View int

const (
	ViewContainers View = iota
	ViewImages
	ViewVolumes
	ViewNetworks
	ViewCompose
)

var tabNames = []string{"Containers", "Images", "Volumes", "Networks", "Compose"}

type Model struct {
	tui.BaseModel
	activeTab  int
	containers views.ContainersModel
	images     views.ImagesModel
	volumes    views.VolumesModel
	networks   views.NetworksModel
	compose    views.ComposeModel
	ready      bool
}

func New() Model {
	styles := tui.DefaultStyles()
	return Model{
		BaseModel:  tui.NewBaseModel().WithStyles(styles),
		containers: views.NewContainersModel(styles),
		images:     views.NewImagesModel(styles),
		volumes:    views.NewVolumesModel(styles),
		networks:   views.NewNetworksModel(styles),
		compose:    views.NewComposeModel(styles),
	}
}

func (m Model) Init() tea.Cmd {
	return m.containers.Init()
}

func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.KeyMsg:
		switch msg.String() {
		case views.KeyQuit:
			return m, tea.Quit
		case "q", "0", "esc":
			updated, atBase := m.handleBack()
			if atBase {
				return updated, tea.Quit
			}
			return updated, nil
		case views.KeyTab:
			m.activeTab = (m.activeTab + 1) % len(tabNames)
			return m, m.initActiveView()
		case "shift+tab":
			m.activeTab = (m.activeTab - 1 + len(tabNames)) % len(tabNames)
			return m, m.initActiveView()
		}
	case tea.WindowSizeMsg:
		m.HandleWindowSize(msg)
		m.ready = true
	}

	var cmd tea.Cmd
	switch View(m.activeTab) {
	case ViewContainers:
		m.containers, cmd = m.containers.Update(msg)
	case ViewImages:
		m.images, cmd = m.images.Update(msg)
	case ViewVolumes:
		m.volumes, cmd = m.volumes.Update(msg)
	case ViewNetworks:
		m.networks, cmd = m.networks.Update(msg)
	case ViewCompose:
		m.compose, cmd = m.compose.Update(msg)
	}
	return m, cmd
}

func (m Model) View() string {
	if !m.ready {
		return "Loading..."
	}

	// Tab bar
	tabs := m.renderTabs()

	// Active view content
	var content string
	switch View(m.activeTab) {
	case ViewContainers:
		content = m.containers.View()
	case ViewImages:
		content = m.images.View()
	case ViewVolumes:
		content = m.volumes.View()
	case ViewNetworks:
		content = m.networks.View()
	case ViewCompose:
		content = m.compose.View()
	}

	// Status bar
	status := m.Styles.StatusBar.Render(" Tab: switch view │ Ctrl+C: quit │ Enter: action │ r: refresh")

	return lipgloss.JoinVertical(lipgloss.Left,
		tabs,
		"",
		content,
		"",
		status,
	)
}

func (m Model) renderTabs() string {
	var tabs []string
	for i, name := range tabNames {
		if i == m.activeTab {
			tabs = append(tabs, m.Styles.Selected.Render(" "+name+" "))
		} else {
			tabs = append(tabs, m.Styles.Muted.Render(" "+name+" "))
		}
	}
	row := lipgloss.JoinHorizontal(lipgloss.Top, tabs...)
	return m.Styles.Header.Render("Docker TUI") + "  " + row
}

// handleBack asks the active view to go back one level.
// Returns the updated model and true if the view was already at base level (app should quit).
func (m Model) handleBack() (Model, bool) {
	switch View(m.activeTab) {
	case ViewContainers:
		atBase := m.containers.HandleBack()
		return m, atBase
	case ViewImages:
		atBase := m.images.HandleBack()
		return m, atBase
	case ViewVolumes:
		atBase := m.volumes.HandleBack()
		return m, atBase
	case ViewNetworks:
		atBase := m.networks.HandleBack()
		return m, atBase
	case ViewCompose:
		atBase := m.compose.HandleBack()
		return m, atBase
	}
	return m, true
}

func (m Model) initActiveView() tea.Cmd {
	switch View(m.activeTab) {
	case ViewContainers:
		return m.containers.Init()
	case ViewImages:
		return m.images.Init()
	case ViewVolumes:
		return m.volumes.Init()
	case ViewNetworks:
		return m.networks.Init()
	case ViewCompose:
		return m.compose.Init()
	}
	return nil
}