package transcript

import (
	"fmt"
	"time"

	"github.com/charmbracelet/lipgloss"
	"playback/internal/srt"
	"playback/internal/ui"
)

// RenderCue renders a single cue with optional highlighting
func RenderCue(cue *srt.Cue, isActive bool, width int) string {
	// Format timestamp
	timestamp := formatTimestamp(cue.Start, cue.End)

	// Apply styles based on state
	var textStyle, timestampStyle lipgloss.Style
	var prefix string

	if isActive {
		// Active cue (playback position + navigation cursor)
		textStyle = ui.ActiveCueStyle
		timestampStyle = ui.ActiveTimestampStyle
		prefix = "> "
	} else {
		textStyle = ui.BaseStyle
		timestampStyle = ui.TimestampStyle
		prefix = "  "
	}

	timestampStr := timestampStyle.Render(timestamp)
	textStr := textStyle.Render(cue.Text)

	return fmt.Sprintf("%s%s\n%s%s\n", prefix, timestampStr, prefix, textStr)
}

// formatTimestamp formats start/end times as SRT timestamp
func formatTimestamp(start, end time.Duration) string {
	return fmt.Sprintf("%s --> %s",
		formatTime(start),
		formatTime(end),
	)
}

// formatTime formats a duration as HH:MM:SS,mmm
func formatTime(d time.Duration) string {
	h := d / time.Hour
	d -= h * time.Hour
	m := d / time.Minute
	d -= m * time.Minute
	s := d / time.Second
	d -= s * time.Second
	ms := d / time.Millisecond

	return fmt.Sprintf("%02d:%02d:%02d,%03d", h, m, s, ms)
}