#!/usr/bin/env node
import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

import {
  analyzeLive2DMinJsSource,
  buildCallResolutionReviewCatalog,
  buildFunctionNameReviewCatalog,
  buildLegacyFunctionRenameCatalog,
  type Live2DCallResolutionDecisionCatalog,
  type Live2DFunctionNameDecisionCatalog,
} from "../src/tools/deobfuscation.js";
import {
  auditLive2DModuleMigrations,
  type Live2DModuleMigrationDecisionCatalog,
  type Live2DModuleMigrationManifest,
} from "../src/tools/live2dModuleMigrations.js";
import { analyzeLive2DBootstrapGraph } from "../src/tools/live2dBootstrapGraph.js";
import {
  auditLive2DRuntimeCoverage,
  type Live2DRuntimeBehaviorDecisionCatalog,
} from "../src/tools/live2dRuntimeCoverage.js";

interface CliOptions {
  behaviorDecisionPath: string;
  callDecisionPath: string;
  functionDecisionPath: string;
  implementationRoot: string;
  migrationDecisionPath: string;
  moduleManifestPath: string;
  outputPath: string;
  productionRoot: string;
  sourcePath: string;
}

const dirname = path.dirname(fileURLToPath(import.meta.url));
const workspaceRoot = path.resolve(
  process.env.KT_WORKSPACE_ROOT || path.join(dirname, "../../.."),
);

/** Resolves a CLI path against the shared KT workspace root. */
function resolveWorkspacePath(value: string): string {
  return path.isAbsolute(value) ? value : path.resolve(workspaceRoot, value);
}

/** Parses the bounded current-state runtime coverage CLI. */
function parseArgs(argv: string[]): CliOptions {
  const args = new Map<string, string>();
  for (let index = 0; index < argv.length; index += 1) {
    const item = argv[index];
    if (!item.startsWith("--")) continue;
    const [key, inlineValue] = item.slice(2).split("=", 2);
    if (inlineValue !== undefined) {
      args.set(key, inlineValue);
      continue;
    }
    const next = argv[index + 1];
    if (next && !next.startsWith("--")) {
      args.set(key, next);
      index += 1;
    }
  }
  return {
    behaviorDecisionPath: resolveWorkspacePath(
      args.get("behavior-decisions") ??
        "docs/live2d-deobfuscation/runtime-behavior-decisions.json",
    ),
    callDecisionPath: resolveWorkspacePath(
      args.get("call-decisions") ?? "docs/live2d-deobfuscation/call-resolutions.json",
    ),
    functionDecisionPath: resolveWorkspacePath(
      args.get("function-decisions") ??
        "docs/live2d-deobfuscation/function-name-decisions.json",
    ),
    implementationRoot: resolveWorkspacePath(
      args.get("implementation-root") ??
        "Vue/kt-blog-web/src/components/blog/live2d/vendor/cubism2Core",
    ),
    migrationDecisionPath: resolveWorkspacePath(
      args.get("migration-decisions") ??
        "docs/live2d-deobfuscation/module-migration-decisions.json",
    ),
    moduleManifestPath: resolveWorkspacePath(
      args.get("module-manifest") ?? "docs/live2d-deobfuscation/module-splits.json",
    ),
    outputPath: resolveWorkspacePath(
      args.get("output") ??
        ".kt-workspace/deobfuscate/blog-live2d-cubism2-minjs/live2d.min/runtime-coverage.generated.json",
    ),
    productionRoot: resolveWorkspacePath(
      args.get("production-root") ?? "Vue/kt-blog-web/src/components/blog/live2d",
    ),
    sourcePath: resolveWorkspacePath(
      args.get("source") ??
        "Vue/kt-blog-web/public/live2d/wordpress-moc/live2d.min.js",
    ),
  };
}

/** Reads one typed JSON input while semantic validation remains in the audit. */
function readJson<T>(filePath: string): T {
  return JSON.parse(readFileSync(filePath, "utf8")) as T;
}

/** Writes one deterministic generated coverage artifact under `.kt-workspace`. */
function writeJson(filePath: string, value: unknown): void {
  mkdirSync(path.dirname(filePath), { recursive: true });
  writeFileSync(filePath, `${JSON.stringify(value, null, 2)}\n`, "utf8");
}

/** Rebuilds every current catalog and emits the complete runtime coverage report. */
function main(): void {
  const options = parseArgs(process.argv.slice(2));
  const source = readFileSync(options.sourcePath, "utf8");
  const sourcePath = path.relative(workspaceRoot, options.sourcePath).replaceAll("\\", "/");
  const sourceAudit = analyzeLive2DMinJsSource(source, { sourcePath });
  const functionDecisions = readJson<Live2DFunctionNameDecisionCatalog>(
    options.functionDecisionPath,
  );
  const callDecisions = readJson<Live2DCallResolutionDecisionCatalog>(
    options.callDecisionPath,
  );
  const functionCatalog = buildFunctionNameReviewCatalog(
    sourceAudit,
    buildLegacyFunctionRenameCatalog(sourceAudit, []),
    functionDecisions,
  );
  const callCatalog = buildCallResolutionReviewCatalog(
    sourceAudit,
    functionCatalog,
    callDecisions,
  );
  const bootstrapGraph = analyzeLive2DBootstrapGraph(
    source,
    sourceAudit,
    functionCatalog,
    callCatalog,
  );
  const moduleManifest = readJson<Live2DModuleMigrationManifest>(
    options.moduleManifestPath,
  );
  const migrationCatalog = readJson<Live2DModuleMigrationDecisionCatalog>(
    options.migrationDecisionPath,
  );
  const migrationAudit = auditLive2DModuleMigrations({
    decisions: migrationCatalog,
    implementationRoot: options.implementationRoot,
    moduleManifest,
    source,
    sourceFunctions: sourceAudit.functions,
    workspaceRoot,
  });
  const behaviorCatalog = readJson<Live2DRuntimeBehaviorDecisionCatalog>(
    options.behaviorDecisionPath,
  );
  const runtimeRoot = path.join(options.productionRoot, "runtime");
  const runtimeEntryPath = path.join(options.implementationRoot, "runtimeCore.ts");
  const rendererPath = path.join(runtimeRoot, "webglLive2DRenderer.ts");
  const coordinatesPath = path.join(runtimeRoot, "cubism2PointerCoordinates.ts");
  const coordinateSpec = resolveWorkspacePath(
    "Vue/kt-blog-web/src/__tests__/live2d/Cubism2PointerCoordinates.spec.ts",
  );
  const trackingSpec = resolveWorkspacePath(
    "Vue/kt-blog-web/src/__tests__/live2d/Cubism2PointerTracking.spec.ts",
  );
  const report = auditLive2DRuntimeCoverage({
    behaviorCatalog,
    callCatalog,
    coreRoot: options.implementationRoot,
    expected: {
      calls: 1411,
      functions: 627,
      migrated: 567,
      modules: 38,
      omittedUnreachable: 60,
      supportModules: 5,
    },
    functionCatalog,
    fullPageGazeCoordinatesPath: coordinatesPath,
    fullPageGazeRendererPath: rendererPath,
    migrationAudit,
    migrationCatalog,
    moduleManifest,
    productionRoot: options.productionRoot,
    productBehaviorTests: [
      {
        filePath: coordinateSpec,
        testName: "uses the whole viewport as a continuous page-level look-at range",
      },
      {
        filePath: coordinateSpec,
        testName: "retains page-level distance after the pointer leaves the canvas",
      },
      {
        filePath: trackingSpec,
        testName: "tracks mouse movement across the page and removes every listener on destroy",
      },
    ],
    retiredPaths: [
      path.join(options.productionRoot, "vendor/cubism2Core.ts"),
      path.join(runtimeRoot, "cubism2CoreLoader.ts"),
      path.join(options.implementationRoot, "compatibility"),
      path.join(options.implementationRoot, "coreGlobals.ts"),
      path.join(options.implementationRoot, "legacyKernel.ts"),
      path.join(options.implementationRoot, "sdkGlobalInstaller.ts"),
      path.join(options.implementationRoot, "sdkGlobalNames.ts"),
      path.join(options.implementationRoot, "autoEyeBlink.ts"),
      path.join(options.implementationRoot, "legacyMotion.ts"),
      path.join(options.implementationRoot, "webglAttributes.ts"),
      path.join(options.implementationRoot, "webglBlendFactors.ts"),
      path.join(options.implementationRoot, "webglDrawTail.ts"),
      path.join(options.implementationRoot, "webglFramebuffer.ts"),
      path.join(options.implementationRoot, "webglShaderLocations.ts"),
      path.join(options.implementationRoot, "webglTextureBindings.ts"),
      path.join(options.implementationRoot, "webglUniforms.ts"),
    ],
    runtimeConsumerPaths: [rendererPath],
    runtimeEntryPath,
    sourceWindowExports: bootstrapGraph.windowExports
      .slice()
      .sort((left, right) => left.exportOrder - right.exportOrder)
      .map((entry) => entry.exportName),
    workspaceRoot,
  });
  writeJson(options.outputPath, report);
  console.log(
    JSON.stringify(
      {
        calls: report.calls,
        modules: report.modules,
        ok: true,
        outputPath: path.relative(workspaceRoot, options.outputPath).replaceAll("\\", "/"),
        postCoreContracts: report.postCoreContracts,
        sourceSha256: report.sourceSha256,
        summary: report.summary,
      },
      null,
      2,
    ),
  );
}

try {
  main();
} catch (error) {
  console.error(error instanceof Error ? error.message : error);
  process.exit(1);
}