import { expect, test } from "@playwright/test";
import { readFileSync } from "node:fs";
import { resolve } from "node:path";

import { hasScaleAdjustTargetChanged } from "../../components/canvas/nodes/image-node/image-node-local-edit";

function readSource(path: string) {
  return readFileSync(resolve(process.cwd(), path), "utf8");
}

test.describe("canvas scale adjust product lock", () => {
  test("accepts target movement even when target size stays unchanged", () => {
    const source = { height: 0.4, width: 0.3, x: 0.2, y: 0.25 };

    expect(hasScaleAdjustTargetChanged(source, source)).toBe(false);
    expect(
      hasScaleAdjustTargetChanged(source, { ...source, x: 0.46, y: 0.12 })
    ).toBe(true);
    expect(
      hasScaleAdjustTargetChanged(source, {
        ...source,
        height: 0.32,
        width: 0.24,
      })
    ).toBe(true);
  });

  test("uses the same movement validation in canvas and detail result flows", () => {
    const canvasNode = readSource("components/canvas/nodes/ImageNode.tsx");
    const detailWorkspace = readSource(
      "components/agents/AgentGenerationWorkspaceDarkV2.tsx"
    );

    expect(canvasNode).toContain("hasScaleAdjustTargetChanged(");
    expect(detailWorkspace).toContain("hasScaleAdjustTargetChanged(");
    expect(canvasNode).toContain("青色目标框大小或位置");
    expect(detailWorkspace).toContain("目标框大小和位置均未变化");
  });

  test("uses one dedicated erase step and exact product overlay", () => {
    const route = readSource("app/api/canvas/local-edit/route.ts");

    expect(route).toContain("buildScaleAdjustProductLockAssets");
    expect(route).toContain('objectRemovalMode: "premium"');
    expect(route).toContain("objectRemovalMaskImageUrl: modelMaskUpload.url");
    expect(route).toContain("maskImageUrl: modelMaskUpload.url");
    expect(route).toContain("hasPositionMove");
    expect(route).toContain('aspectRatio: hasPositionMove ? "auto" : resolvedAspectRatio');
    expect(route).toContain("overlayImageUrl: overlayUpload.url");
    expect(route).toContain("repairMaskImageUrl: repairMaskUpload.url");
    expect(route).toContain("sourceImageUrl");
    expect(route).toContain("protectPeople: hasPositionMove");
    expect(route).toContain("oldFootprintMaskImageUrl: hasPositionMove");
    expect(route).toContain("? sourceSubjectMaskUpload?.url");
    expect(route).toContain("deterministicProductOverlayApplied: true");
    expect(route).toContain("scaleAdjustPersonExclusionApplied:");
    expect(route).toContain("sourceSubjectMaskImageUrl: sourceSubjectMaskUpload.url");
    expect(route).toContain("shadowSourceImageUrl: sourceImageUrl");
    expect(route).toContain('"finegrain-erase-product-lock-v1"');
    expect(route).toContain('"gpt-mask-background-rebuild-product-lock-v1"');
    expect(route).not.toContain("buildScaleAdjustVisualGuide");
    expect(route).not.toContain("source-plus-guide-v1");
  });

  test("routes object removal through the configured fal credential", () => {
    const provider = readSource("lib/ai/providers/fal-image.ts");

    expect(provider).toContain(
      'const FAL_OBJECT_REMOVAL_MODEL_ID = "fal-ai/finegrain-eraser/mask"'
    );
    expect(provider).toContain("image_url: imageUrls[0]");
    expect(provider).toContain("mask_url: objectRemovalMaskImageUrl");
    expect(provider).toContain('objectRemovalMode || ""');
  });

  test("retries old-footprint failures against the first cleaned result", () => {
    const route = readSource("app/api/canvas/local-edit/route.ts");
    const generator = readSource("lib/canvas/generate-image.ts");

    expect(route).toContain("rejectOldFootprintOnly: true");
    expect(route).toContain("scaleAdjustSequentialCleanupRetry: true");
    expect(route).toContain('label: "finegrain-cleanup-pass"');
    expect(generator).toContain(
      'scaleAdjustRejection?.reason === "old-footprint-remnant-detected"'
    );
    expect(generator).toContain("referenceImages: [sequentialCleanupReferenceUrl]");
  });

  test("keeps transparent product images on a deterministic empty plate", () => {
    const productLock = readSource("lib/canvas/scale-adjust-product-lock.ts");

    expect(productLock).toContain("hasTransparentBackground");
    expect(productLock).toContain("sharp(transparentCanvas)");
    expect(productLock).toContain("backgroundPlateBuffer");
  });

  test("protects people and rejects products materially occluded by them", () => {
    const productLock = readSource("lib/canvas/scale-adjust-product-lock.ts");
    const rmbg = readSource("lib/ai/rmbg/service.ts");

    expect(productLock).toContain('foregroundType: "person"');
    expect(productLock).toContain("regionPersonExclusionAlpha");
    expect(productLock).toContain("overlapPixelCount >= overlapLimit");
    expect(productLock).toContain("目标产品被人物遮挡");
    expect(productLock).toContain("personExclusionApplied: Boolean(personExclusionAlpha)");
    expect(productLock).toContain("expandedAlphaRaw[index] >= 8 ? 255 : 0");
    expect(productLock).toContain(".threshold(8)\n      .extractChannel(0)");
    expect(rmbg).toContain("foregroundType: foregroundType ??");
  });

  test("moves the original contact shadow with the exact product overlay", () => {
    const generator = readSource("lib/canvas/generate-image.ts");

    expect(generator).toContain("buildScaleAdjustTransferredShadow");
    expect(generator).toContain("cleanedLuma - sourceLuma - 4");
    expect(generator).toContain("transferredShadowBuffer");
    expect(generator).toContain("transferredShadowCount");
    expect(generator).toContain("if (!(isShrink || isMove)) continue");
    expect(generator).toContain(
      "const maskHit = explicitMaskRaw\n          ? explicitMaskValue > 18"
    );
    expect(generator).toContain("(!isMove &&");
    expect(generator).toContain(
      "const generatedWidth = compositeBaseBuffer ? overlayWidth : modelWidth"
    );
    expect(generator).toContain(
      ".extractChannel(3)\n            .blur(Math.max(4"
    );
    expect(generator).toContain(".extractChannel(0)\n            .raw()\n            .toBuffer()");
  });

  test("uses the image edit model to rebuild lighting at the target position", () => {
    const route = readSource("app/api/canvas/local-edit/route.ts");
    const queue = readSource("lib/canvas/image-task-queue.ts");
    const relight = readSource("lib/canvas/scale-adjust-model-relight.ts");

    expect(route).toContain("scaleAdjustModelRelight:");
    expect(route).toContain("...(hasPositionMove");
    expect(route).toContain("overlayImageUrl: overlayUpload.url");
    expect(queue).toContain("applyScaleAdjustModelRelight");
    expect(relight).toContain('debugLabel: "canvas-scale-adjust-model-relight"');
    expect(relight).toContain("maskImageUrl: maskUpload.url");
    expect(relight).toContain("生成真实自然的接触阴影与投射阴影");
    expect(relight).toContain("findMedianLumaDelta");
    expect(relight).toContain("productAlpha[pixelIndex] >= 8 ? 0");
  });

  test("keeps non-pro detail result scale adjust on the shared backend flow", () => {
    const source = readSource(
      "components/agents/AgentGenerationWorkspaceDarkV2.tsx"
    );

    expect(source).toContain(
      "const resolvedLocalEditModelId = isScaleAdjust\n        ? undefined"
    );
    expect(source).toContain(
      'operation: isScaleAdjust ? "scale-adjust" : undefined'
    );
    expect(source).toContain("targetRect: region.targetRect");
    expect(source).toContain('resultModeType: "detail_generation"');
    expect(source).toContain('mode: "scale_adjust"');
  });
});