insights/livestream/tui/views/detail.go

package views

import (
	"encoding/json"
	"fmt"
	"sort"
	"strings"

	"github.com/charmbracelet/lipgloss"
	"github.com/insights/insights/livestream/tui/sse"
)

type DetailView struct {
	event   *sse.EventMsg
	scroll  int
	width   int
	height  int
	lines   []string
	visible bool
}

func NewDetailView() *DetailView {
	return &DetailView{}
}

func (v *DetailView) SetEvent(e *sse.EventMsg) {
	v.event = e
	v.scroll = 0
	v.visible = e != nil
	v.buildLines()
}

func (v *DetailView) SetSize(w, h int) {
	v.width = w
	v.height = h
}

func (v *DetailView) IsVisible() bool {
	return v.visible
}

func (v *DetailView) Close() {
	v.visible = false
	v.event = nil
}

func (v *DetailView) ScrollUp() {
	if v.scroll > 0 {
		v.scroll--
	}
}

func (v *DetailView) ScrollDown() {
	maxScroll := max(len(v.lines)-v.contentHeight(), 0)
	if v.scroll < maxScroll {
		v.scroll++
	}
}

func (v *DetailView) contentHeight() int {
	return max(v.height-6, 1)
}

func (v *DetailView) buildLines() {
	if v.event == nil {
		v.lines = nil
		return
	}

	keyStyle := lipgloss.NewStyle().
		Foreground(lipgloss.Color("#8F8F8F")).
		Bold(true)
	valStyle := lipgloss.NewStyle().
		Foreground(lipgloss.AdaptiveColor{Light: "#1D1F27", Dark: "#EDEDEC"})

	var lines []string
	lines = append(lines, keyStyle.Render("Event: ")+valStyle.Render(v.event.Event))
	lines = append(lines, keyStyle.Render("UUID: ")+valStyle.Render(v.event.UUID))
	lines = append(lines, keyStyle.Render("Distinct ID: ")+valStyle.Render(v.event.DistinctID))
	lines = append(lines, keyStyle.Render("Person ID: ")+valStyle.Render(v.event.PersonID))
	lines = append(lines, keyStyle.Render("Timestamp: ")+valStyle.Render(fmt.Sprint(v.event.Timestamp)))
	lines = append(lines, "")
	lines = append(lines, keyStyle.Render("Properties:"))

	if v.event.Properties != nil {
		// border (2) + padding (2*2) + indent (2) = 8 chars of overhead
		maxValWidth := max(v.width-8, 20)

		keys := make([]string, 0, len(v.event.Properties))
		for k := range v.event.Properties {
			keys = append(keys, k)
		}
		sort.Strings(keys)

		for _, k := range keys {
			val := v.event.Properties[k]
			valStr := formatValue(val)
			// key prefix takes up space: "  " + key + ": "
			available := max(maxValWidth-len(k)-4, 10)
			if len(valStr) > available {
				valStr = valStr[:available-3] + "..."
			}
			lines = append(lines, "  "+keyStyle.Render(k+": ")+valStyle.Render(valStr))
		}
	}

	v.lines = lines
}

func formatValue(v any) string {
	switch val := v.(type) {
	case string:
		return val
	case nil:
		return "null"
	default:
		b, err := json.Marshal(val)
		if err != nil {
			return fmt.Sprint(val)
		}
		return string(b)
	}
}

func (v *DetailView) View() string {
	if !v.visible || v.event == nil {
		return ""
	}

	borderStyle := lipgloss.NewStyle().
		Border(lipgloss.RoundedBorder()).
		BorderForeground(lipgloss.AdaptiveColor{Light: "#333333", Dark: "#CCCCCC"}).
		Padding(1, 2).
		Width(v.width - 4).
		Height(v.height - 2)

	titleStyle := lipgloss.NewStyle().
		Bold(true).
		Foreground(lipgloss.AdaptiveColor{Light: "#333333", Dark: "#CCCCCC"})

	ch := v.contentHeight()
	end := min(v.scroll+ch, len(v.lines))
	start := min(v.scroll, len(v.lines))

	hintStyle := lipgloss.NewStyle().
		Foreground(lipgloss.AdaptiveColor{Light: "#888888", Dark: "#666666"})

	visible := v.lines[start:end]
	title := titleStyle.Render("Event Detail") + "  " + hintStyle.Render("(esc to go back, j/k to scroll)")
	content := title + "\n\n" + strings.Join(visible, "\n")

	return borderStyle.Render(content)
}