package credits

import (
	"context"
	"fmt"
	"os"
	"testing"
	"time"
)

func TestDebugDump(t *testing.T) {
	path := os.Getenv("MEMBY_DEBUG_CLIP")
	if path == "" {
		t.Skip("no clip")
	}
	s := &Sampler{Timeout: 2 * time.Minute}
	coarse, err := s.Sample(context.Background(), path, 0, 91380*time.Millisecond, coarseInterval)
	if err != nil {
		t.Fatal(err)
	}
	t.Logf("coarse frames=%d", len(coarse))
	for i, f := range coarse {
		t.Logf("  [%2d] pos=%6d mean=%.3f dark=%.3f edge=%.4f var=%.4f diff=%.4f score=%.3f",
			i, f.PositionMs, f.Mean, f.DarkFraction, f.EdgeDensity, f.Variance, f.Diff, creditScore(f))
	}
	idx, sep, ok := findTransition(coarse, coarseInterval)
	t.Logf("coarse transition idx=%d pos=%v sep=%.3f ok=%v", idx, func() int64 {
		if ok {
			return coarse[idx].PositionMs
		}
		return -1
	}(), sep, ok)

	if !ok {
		return
	}
	start := time.Duration(coarse[idx].PositionMs) * time.Millisecond
	from := start - fineSpan
	if from < 0 {
		from = 0
	}
	to := start + fineSpan
	fine, err := s.Sample(context.Background(), path, from, to, fineInterval)
	if err != nil {
		t.Fatal(err)
	}
	fmt.Println("fine from", from, "to", to, "frames", len(fine))
	fidx, fsep, fok := findTransition(fine, fineInterval)
	if fok {
		t.Logf("fine transition idx=%d pos=%d sep=%.3f", fidx, fine[fidx].PositionMs, fsep)
	} else {
		t.Logf("fine transition: NONE (fine pass did not refine)")
	}
}