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 fixtureRoot = path.join(root, "tests/files/web/m12_library_override_v1");
const generator = path.join(root, "tools/web/generate-library-override-fixture.py");
const blender = process.env.BLENDER_BIN ?? path.join(root, "build_blender_5.2.0/bin/blender");
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/M12-03J/manifest.json"));
const report = JSON.parse(read("tests/golden/M12-03J/desktop-override-report.json"));

assert.equal(manifest.task, "M12-03J");
assert.equal(manifest.parentTask, "M12-03I");
assert.equal(manifest.nextTask, "M12-03K");
assert.equal(report.schemaVersion, 1);
assert.equal(report.task, "M12-03J");
assert.equal(report.operation, "LIBRARY_OVERRIDE");
assert.equal(report.blenderVersion, "5.2.0");
assert.deepEqual(report.selectedRoots, ["Object/M12 Override Object"]);
assert.deepEqual(report.overrideGraph.reference, {
  dataBlockId: "Object/M12 Override Object",
  idType: "OBJECT",
  library: "m12_override_source.blend",
  owner: "SOURCE_LIBRARY",
  readOnly: true,
  isLibraryOverride: false,
});
assert.deepEqual(report.overrideGraph.local, {
  dataBlockId: "Object/M12 Override Object",
  idType: "OBJECT",
  library: null,
  owner: "LOCAL_OVERRIDE",
  projectId: "m12-03j-project",
  readOnly: false,
  referenceSourceDataBlockId: "Object/M12 Override Object",
  hierarchyRootDataBlockId: "Object/M12 Override Object",
  isLibraryOverride: true,
});
assert.deepEqual(report.overrideGraph.propertyOverride, {
  index: 0,
  operationCount: 1,
  propertyCount: 1,
  rnaPath: "[\"m12_override_value\"]",
  value: 2.5,
});
assert.equal(report.overrideGraph.sourceMarker, "M12-03J");
for (const artifact of Object.values(manifest.artifacts)) assert.equal(sha256(read(artifact.path)), artifact.sha256, artifact.path);
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 normalize = (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-override-"));
try {
  const generatedRoot = path.join(temporary, "files");
  const generatedReportPath = path.join(temporary, "report.json");
  const output = execFileSync(blender, ["--background", "--factory-startup", "--python", generator, "--", generatedRoot, generatedReportPath], { cwd: root, encoding: "utf8" });
  assert.match(output, /library-override-fixture-ok roots=1/);
  assert.match(output, /owner=LOCAL_OVERRIDE/);
  const generated = JSON.parse(fs.readFileSync(generatedReportPath, "utf8"));
  assert.deepEqual(normalize(generated), normalize(report));
  assert.equal(sha256(fs.readFileSync(path.join(generatedRoot, generated.source.file))), generated.source.sha256);
  assert.equal(sha256(fs.readFileSync(path.join(generatedRoot, generated.target.file))), generated.target.sha256);
}
finally {
  fs.rmSync(temporary, { recursive: true, force: true });
}

process.stdout.write(
  `library-override-fixture-check-ok roots=${report.selectedRoots.length} ` +
  `reference=${report.overrideGraph.reference.library} owner=${report.overrideGraph.local.owner} ` +
  `path=${report.overrideGraph.propertyOverride.rnaPath} next=${report.nextTask}\n`,
);