package videogen

import "testing"

func TestApplyDoesNotMutateOriginal(t *testing.T) {
	orig := Request{Prompt: "a cat"}
	got := orig.Apply(
		WithSize("1280x704"),
		WithNumFrames(81),
		WithFPS(16),
		WithSteps(4),
		WithGuidanceScale(1.0),
		WithNegativePrompt("blurry"),
		WithSeed(42),
		WithInitImage(Image{MIME: "image/png", Data: []byte{1}}),
	)

	if orig.Size != "" || orig.NumFrames != 0 || orig.FPS != 0 || orig.Steps != nil ||
		orig.GuidanceScale != nil || orig.NegativePrompt != "" || orig.Seed != nil || orig.InitImage != nil {
		t.Fatalf("original mutated: %+v", orig)
	}

	if got.Size != "1280x704" || got.NumFrames != 81 || got.FPS != 16 {
		t.Errorf("size/frames/fps = %q/%d/%d", got.Size, got.NumFrames, got.FPS)
	}
	if got.Steps == nil || *got.Steps != 4 {
		t.Errorf("steps = %v", got.Steps)
	}
	if got.GuidanceScale == nil || *got.GuidanceScale != 1.0 {
		t.Errorf("guidance = %v", got.GuidanceScale)
	}
	if got.NegativePrompt != "blurry" {
		t.Errorf("negative = %q", got.NegativePrompt)
	}
	if got.Seed == nil || *got.Seed != 42 {
		t.Errorf("seed = %v", got.Seed)
	}
	if got.InitImage == nil || got.InitImage.MIME != "image/png" {
		t.Errorf("init image = %+v", got.InitImage)
	}
}

func TestApplyModelOptions(t *testing.T) {
	called := false
	ApplyModelOptions([]ModelOption{func(*ModelConfig) { called = true }})
	if !called {
		t.Fatal("model option not applied")
	}
}