package tui

import (
	"fmt"
	"strings"

	tea "github.com/charmbracelet/bubbletea"

	"git.tukangketik.id/swanadiva/hostkeeper/internal/models"
)

// HostListTab is the host list tab
type HostListTab struct {
	hosts         []*models.Host
	selectedIndex int
	err           error
	width         int
	height        int
}

// NewHostListTab creates a new host list tab
func NewHostListTab() *HostListTab {
	return &HostListTab{
		selectedIndex: 0,
	}
}

// Init initializes the tab
func (t *HostListTab) Init() tea.Cmd {
	return nil
}

// Name returns the tab name
func (t *HostListTab) Name() string {
	return "Hosts"
}

// Update handles messages for the host list
func (t *HostListTab) Update(msg tea.Msg) (Tab, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		t.width = msg.Width
		t.height = msg.Height

	case tea.KeyMsg:
		switch msg.String() {
		case "up", "k":
			if t.selectedIndex > 0 {
				t.selectedIndex--
			}

		case "down", "j":
			if t.selectedIndex < len(t.hosts)-1 {
				t.selectedIndex++
			}

		case "enter", " ":
			if len(t.hosts) > 0 {
				return t, tea.Quit
			}
		}
	}

	return t, nil
}

// View renders the host list
func (t *HostListTab) View() string {
	var b strings.Builder

	b.WriteString(AppTitleStyle.Render("HOSTKEEPER - SSH Manager"))
	b.WriteString("\n\n")

	if len(t.hosts) == 0 {
		b.WriteString(SubtitleStyle.Render("No hosts found. Add your first host with: hostkeeper add"))
		b.WriteString("\n\n")
		return b.String()
	}

	for i, host := range t.hosts {
		if i == t.selectedIndex {
			b.WriteString(renderSelectedHost(host))
		} else {
			b.WriteString(renderHost(host))
		}
		b.WriteString("\n")
	}

	return b.String()
}

// SetHosts sets the host list
func (t *HostListTab) SetHosts(hosts []*models.Host) {
	t.hosts = hosts
	if len(hosts) > 0 && t.selectedIndex >= len(hosts) {
		t.selectedIndex = len(hosts) - 1
	}
}

// Hosts returns the host list
func (t *HostListTab) Hosts() []*models.Host {
	return t.hosts
}

// SelectedIndex returns the selected index
func (t *HostListTab) SelectedIndex() int {
	return t.selectedIndex
}

// FindHostListTab finds the first HostListTab in a list of tabs
func FindHostListTab(tabs []Tab) *HostListTab {
	for _, tab := range tabs {
		if ht, ok := tab.(*HostListTab); ok {
			return ht
		}
	}
	return nil
}

// renderHost renders a single host
func renderHost(host *models.Host) string {
	var b strings.Builder

	b.WriteString(HostNameStyle.Render(host.Name))
	b.WriteString("\n")

	details := fmt.Sprintf("   %s@%s:%d", host.Username, host.Hostname, host.Port)
	b.WriteString(HostDetailStyle.Render(details))

	if len(host.Tags) > 0 {
		tags := formatTagsForTUI(host.Tags)
		b.WriteString(" " + TagStyle.Render(tags))
	}

	return b.String()
}

// renderSelectedHost renders the selected host with highlight
func renderSelectedHost(host *models.Host) string {
	hostText := renderHost(host)
	return SelectedStyle.Render(hostText)
}

// formatTagsForTUI formats tags for TUI display
func formatTagsForTUI(tags []string) string {
	if len(tags) == 0 {
		return ""
	}

	var formatted []string
	for _, tag := range tags {
		formatted = append(formatted, "["+tag+"]")
	}

	return strings.Join(formatted, " ")
}