package detailsviewer

import (
	"log/slog"
	"tasksquire/common"
	"tasksquire/taskwarrior"

	"github.com/charmbracelet/bubbles/viewport"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/glamour"
	"github.com/charmbracelet/lipgloss"
)

// DetailsViewer is a reusable component for displaying task details
type DetailsViewer struct {
	common   *common.Common
	viewport viewport.Model
	task     *taskwarrior.Task
	focused  bool
	width    int
	height   int
}

// New creates a new DetailsViewer component
func New(com *common.Common) *DetailsViewer {
	return &DetailsViewer{
		common:   com,
		viewport: viewport.New(0, 0),
		focused:  false,
	}
}

// SetTask updates the task to display
func (d *DetailsViewer) SetTask(task *taskwarrior.Task) {
	d.task = task
	d.updateContent()
}

// Focus sets the component to focused state (for future interactivity)
func (d *DetailsViewer) Focus() {
	d.focused = true
}

// Blur sets the component to blurred state
func (d *DetailsViewer) Blur() {
	d.focused = false
}

// IsFocused returns whether the component is focused
func (d *DetailsViewer) IsFocused() bool {
	return d.focused
}

// SetSize implements common.Component
func (d *DetailsViewer) SetSize(width, height int) {
	d.width = width
	d.height = height

	// Account for border and padding (4 chars horizontal, 4 lines vertical)
	d.viewport.Width = max(width-4, 0)
	d.viewport.Height = max(height-4, 0)

	// Refresh content with new width
	d.updateContent()
}

// Init implements tea.Model
func (d *DetailsViewer) Init() tea.Cmd {
	return nil
}

// Update implements tea.Model
func (d *DetailsViewer) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmd tea.Cmd
	d.viewport, cmd = d.viewport.Update(msg)
	return d, cmd
}

// View implements tea.Model
func (d *DetailsViewer) View() string {
	// Title bar
	titleStyle := lipgloss.NewStyle().
		Bold(true).
		Foreground(lipgloss.Color("252"))

	helpStyle := lipgloss.NewStyle().
		Foreground(lipgloss.Color("240"))

	header := lipgloss.JoinHorizontal(
		lipgloss.Left,
		titleStyle.Render("Details"),
		" ",
		helpStyle.Render("(↑/↓ scroll, v/ESC close)"),
	)

	// Container style
	containerStyle := lipgloss.NewStyle().
		Border(lipgloss.RoundedBorder()).
		BorderForeground(lipgloss.Color("240")).
		Padding(0, 1).
		Width(d.width).
		Height(d.height)

	// Optional: highlight border when focused (for future interactivity)
	if d.focused {
		containerStyle = containerStyle.
			BorderForeground(lipgloss.Color("86"))
	}

	content := lipgloss.JoinVertical(
		lipgloss.Left,
		header,
		d.viewport.View(),
	)

	return containerStyle.Render(content)
}

// updateContent refreshes the viewport content based on current task
func (d *DetailsViewer) updateContent() {
	if d.task == nil {
		d.viewport.SetContent("(No task selected)")
		return
	}

	detailsValue := ""
	if details, ok := d.task.Udas["details"]; ok && details != nil {
		detailsValue = details.(string)
	}

	if detailsValue == "" {
		d.viewport.SetContent("(No details for this task)")
		return
	}

	// Render markdown with glamour
	renderer, err := glamour.NewTermRenderer(
		glamour.WithAutoStyle(),
		glamour.WithWordWrap(d.viewport.Width),
	)
	if err != nil {
		slog.Error("failed to create markdown renderer", "error", err)
		// Fallback to plain text
		wrapped := lipgloss.NewStyle().
			Width(d.viewport.Width).
			Render(detailsValue)
		d.viewport.SetContent(wrapped)
		d.viewport.GotoTop()
		return
	}

	rendered, err := renderer.Render(detailsValue)
	if err != nil {
		slog.Error("failed to render markdown", "error", err)
		// Fallback to plain text
		wrapped := lipgloss.NewStyle().
			Width(d.viewport.Width).
			Render(detailsValue)
		d.viewport.SetContent(wrapped)
		d.viewport.GotoTop()
		return
	}

	d.viewport.SetContent(rendered)
	d.viewport.GotoTop()
}

// Helper function
func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}