// Package tui provides the terminal user interface.
package tui

import (
	"strings"

	"github.com/charmbracelet/lipgloss"
)

// Colors - matching kportal style, optimized for dark terminals
var (
	colorPrimary     = lipgloss.Color("205") // Pink/Magenta
	colorSuccess     = lipgloss.Color("42")  // Green
	colorWarning     = lipgloss.Color("220") // Yellow
	colorError       = lipgloss.Color("196") // Red
	colorMuted       = lipgloss.Color("245") // Gray (brighter for dark terminals)
	colorAccent      = lipgloss.Color("141") // Light purple (brighter for dark terminals)
	colorHeader      = lipgloss.Color("220") // Yellow for headers
	colorSelectedBg  = lipgloss.Color("236") // Gray background for selection
	colorSelectedFg  = lipgloss.Color("255") // White foreground for selection
	colorGroupHeader = lipgloss.Color("213") // Light pink for group headers
)

// Title and header styles
var (
	titleStyle = lipgloss.NewStyle().
		Bold(true).
		Foreground(colorHeader).
		Padding(0, 1)
)

// Status indicators
var (
	enabledStyle = lipgloss.NewStyle().
			Foreground(colorSuccess).
			Bold(true)

	disabledStyle = lipgloss.NewStyle().
			Foreground(colorMuted)
)

// Status bar and help
var (
	statusBarStyle = lipgloss.NewStyle().
			Foreground(colorMuted)

	connectedStyle = lipgloss.NewStyle().
			Foreground(colorSuccess).
			SetString("Connected")

	disconnectedStyle = lipgloss.NewStyle().
				Foreground(colorError).
				SetString("Disconnected")

	helpBarStyle = lipgloss.NewStyle().
			Foreground(colorMuted)

	helpKeyStyle = lipgloss.NewStyle().
			Foreground(colorHeader).
			Bold(true)

	helpDescStyle = lipgloss.NewStyle().
			Foreground(colorMuted)
)

// Message styles
var (
	errorMsgStyle = lipgloss.NewStyle().
			Foreground(colorError).
			Bold(true).
			MarginTop(1)

	successMsgStyle = lipgloss.NewStyle().
			Foreground(colorSuccess).
			MarginTop(1)

	updateStyle = lipgloss.NewStyle().
			Foreground(colorSuccess).
			Bold(true)
)

// Form styles
var (
	inputLabelStyle = lipgloss.NewStyle().
			Foreground(colorPrimary).
			Bold(true)

	inputStyle = lipgloss.NewStyle().
			Border(lipgloss.RoundedBorder()).
			BorderForeground(colorMuted).
			Padding(0, 1)

	inputFocusStyle = lipgloss.NewStyle().
			Border(lipgloss.RoundedBorder()).
			BorderForeground(colorPrimary).
			Padding(0, 1)
)

// Dialog/modal styles
var (
	dialogStyle = lipgloss.NewStyle().
			Border(lipgloss.RoundedBorder()).
			BorderForeground(colorAccent).
			Padding(1, 2)

	presetItemStyle = lipgloss.NewStyle().
			Padding(0, 1)

	presetSelectedStyle = lipgloss.NewStyle().
				Background(colorSelectedBg).
				Foreground(colorSelectedFg).
				Padding(0, 1)
)

// WrapHelpText wraps help text to fit within maxWidth, splitting on bullet separators.
// If maxWidth is 0 or negative, returns the original text.
func WrapHelpText(text string, maxWidth int) string {
	if maxWidth <= 0 {
		return helpDescStyle.Render(text)
	}

	separator := " • "
	parts := splitOnSeparator(text, separator)

	var lines []string
	var currentLine string
	var currentWidth int

	for i, part := range parts {
		partWidth := len(part)
		sepWidth := 3 // len(" • ")

		newWidth := currentWidth + partWidth
		if currentWidth > 0 {
			newWidth += sepWidth
		}

		if newWidth > maxWidth && currentWidth > 0 {
			lines = append(lines, currentLine)
			currentLine = part
			currentWidth = partWidth
		} else {
			if currentWidth > 0 {
				currentLine += separator
			}
			currentLine += part
			if i == 0 {
				currentWidth = partWidth
			} else {
				currentWidth = newWidth
			}
		}
	}

	if currentLine != "" {
		lines = append(lines, currentLine)
	}

	// Apply style to each line and join
	var result []string
	for _, line := range lines {
		result = append(result, helpDescStyle.Render(line))
	}

	return strings.Join(result, "\n")
}

// splitOnSeparator splits a string on the given separator.
func splitOnSeparator(s, sep string) []string {
	var parts []string
	for {
		idx := strings.Index(s, sep)
		if idx == -1 {
			parts = append(parts, s)
			break
		}
		parts = append(parts, s[:idx])
		s = s[idx+len(sep):]
	}
	return parts
}