import assert from "node:assert/strict";
import crypto from "node:crypto";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import { execFileSync } from "node:child_process";
import { fileURLToPath } from "node:url";

const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
const read = (relativePath) => fs.readFileSync(path.join(root, relativePath));
const sha256 = (value) => crypto.createHash("sha256").update(value).digest("hex");
const manifest = JSON.parse(read("tests/golden/M12-03F/manifest.json"));
const report = JSON.parse(read("tests/golden/M12-03F/desktop-link-report.json"));
const fixtureRoot = path.join(root, "tests/files/web/m12_library_link_v1");
const generator = path.join(root, "tools/web/generate-library-link-fixture.py");
const blender = process.env.BLENDER_BIN ?? path.join(root, "build_blender_5.2.0/bin/blender");

assert.equal(manifest.task, "M12-03F");
assert.equal(manifest.parentTask, "M12-03E");
assert.equal(manifest.nextTask, "M12-03G");
assert.equal(manifest.operation, "LINK");
for (const artifact of Object.values(manifest.artifacts)) {
  assert.equal(sha256(read(artifact.path)), artifact.sha256, artifact.path);
}

assert.equal(report.schemaVersion, 1);
assert.equal(report.task, "M12-03F");
assert.equal(report.operation, "LINK");
assert.equal(report.blenderVersion, "5.2.0");
assert.equal(report.nextTask, "M12-03G");
assert.deepEqual(report.selectedRoots, ["Object/M12 Link Object"]);
assert.deepEqual(report.sourceGraph, {
  edges: [
    { from: "Object/M12 Link Object", relation: "OBJECT_DATA", to: "Mesh/M12 Link Mesh" },
    { from: "Mesh/M12 Link Mesh", relation: "MATERIAL_SLOT[0]", to: "Material/M12 Link Material" },
    { from: "Material/M12 Link Material", relation: "NODE_IMAGE[M12 Link Image Node]", to: "Image/M12 Link Image" },
  ],
  geometry: { edges: 4, loops: 4, materialSlots: ["M12 Link Material"], polygons: 1, uvLayers: ["UVMap"], vertices: 4 },
  ids: {
    IMAGE: { idType: "IMAGE", isLibraryOverride: false, library: null, name: "M12 Link Image", nameFull: "M12 Link Image" },
    MATERIAL: { idType: "MATERIAL", isLibraryOverride: false, library: null, name: "M12 Link Material", nameFull: "M12 Link Material" },
    MESH: { idType: "MESH", isLibraryOverride: false, library: null, name: "M12 Link Mesh", nameFull: "M12 Link Mesh" },
    OBJECT: { idType: "OBJECT", isLibraryOverride: false, library: null, name: "M12 Link Object", nameFull: "M12 Link Object" },
  },
  image: { channels: 4, colorspace: "sRGB", packed: true, pixelFloat32Sha256: "6f0f8c231d65149e69e6ed12d370bcfa095ef90adc202065492ea8c8ef17e45a", size: [2, 2] },
  root: { idType: "OBJECT", isLibraryOverride: false, library: null, name: "M12 Link Object", nameFull: "M12 Link Object" },
  sourceMarker: "M12-03F",
});
assert.deepEqual(report.linkedGraph.edges, report.sourceGraph.edges);
assert.deepEqual(report.linkedGraph.geometry, report.sourceGraph.geometry);
assert.deepEqual(report.linkedGraph.image, report.sourceGraph.image);
assert.equal(report.linkedGraph.ids.OBJECT.library, "m12_link_source.blend");
assert.equal(report.linkedGraph.ids.OBJECT.nameFull, "M12 Link Object [m12_link_source.blend]");
for (const value of Object.values(report.linkedGraph.ids)) {
  assert.equal(value.library, "m12_link_source.blend");
  assert.equal(value.isLibraryOverride, false);
}
assert.deepEqual(report.stableMapping.map((item) => [item.owner, item.readOnly]), [
  ["SOURCE_LIBRARY", true],
  ["SOURCE_LIBRARY", true],
  ["SOURCE_LIBRARY", true],
  ["SOURCE_LIBRARY", true],
]);
assert.deepEqual(report.stableMapping.map((item) => item.source), [
  "Object/M12 Link Object",
  "Mesh/M12 Link Mesh",
  "Material/M12 Link Material",
  "Image/M12 Link Image",
]);
assert.deepEqual(report.stableMapping.map((item) => item.local), report.stableMapping.map((item) => item.source));
assert.equal(sha256(fs.readFileSync(path.join(fixtureRoot, report.source.file))), report.source.sha256);
assert.equal(sha256(fs.readFileSync(path.join(fixtureRoot, report.target.file))), report.target.sha256);

const normalizeContainerHashes = (value) => ({
  ...value,
  source: { ...value.source, sha256: "<SESSION_BOUND_BLEND_CONTAINER>" },
  target: { ...value.target, sha256: "<SESSION_BOUND_BLEND_CONTAINER>" },
});
const temporary = fs.mkdtempSync(path.join(os.tmpdir(), "m12-library-link-"));
try {
  const generatedFixtureRoot = path.join(temporary, "files");
  const generatedReportPath = path.join(temporary, "report.json");
  const output = execFileSync(blender, [
    "--background",
    "--factory-startup",
    "--python",
    generator,
    "--",
    generatedFixtureRoot,
    generatedReportPath,
  ], { cwd: root, encoding: "utf8" });
  assert.match(output, /library-link-fixture-ok roots=1 mapping=4/);
  assert.match(output, /next=M12-03G/);
  const generated = JSON.parse(fs.readFileSync(generatedReportPath, "utf8"));
  assert.deepEqual(normalizeContainerHashes(generated), normalizeContainerHashes(report));
  assert.equal(sha256(fs.readFileSync(path.join(generatedFixtureRoot, generated.source.file))), generated.source.sha256);
  assert.equal(sha256(fs.readFileSync(path.join(generatedFixtureRoot, generated.target.file))), generated.target.sha256);
}
finally {
  fs.rmSync(temporary, { recursive: true, force: true });
}

process.stdout.write(
  `library-link-fixture-check-ok roots=${report.selectedRoots.length} mapping=${report.stableMapping.length} ` +
  `library=${report.linkedGraph.ids.OBJECT.library} readOnly=${report.stableMapping.every((item) => item.readOnly)} next=${report.nextTask}\n`,
);