package editor

import "time"

// ProbeRecord captures per-frame context for the in-app profiler (see
// internal/perf). It is filled on the logic goroutine and handed to the
// PerfRecord hook once per frame emission. Debug-only: PerfRecord is nil
// unless the app enables profiling (cmd/pad), so the per-frame cost is a
// single nil check.
type ProbeRecord struct {
	T           time.Time
	DeltaMs     float64 // ms since the previous frame emission
	Page        string  // "editor" | "browser"
	ScrollDP    float32 // editor scroll offset (Dp); browser scroll when on browser
	MaxScrollDP float32 // editor max scroll (Dp)
	TotalLines  int
	VisStart    int // visible byte range start
	VisEnd      int // visible byte range end (exclusive)
}

// PerfRecord is an optional per-frame probe hook, set by the app when in-app
// profiling is enabled. It is called on the logic goroutine, once per frame.
var PerfRecord func(ProbeRecord)

func pageName(p Page) string {
	if p == EditorPage {
		return "editor"
	}
	return "browser"
}