// import path from "path";
// import ts from "typescript";
// import { MetadataCollection } from "typia/lib/factories/MetadataCollection";
// import { MetadataFactory } from "typia/lib/factories/MetadataFactory";
// import { Metadata } from "typia/lib/schemas/metadata/Metadata";

// import { INestiaProject } from "../structures/INestiaProject";
// import { IReflectController } from "../structures/IReflectController";
// import { IReflectHttpOperation } from "../structures/IReflectHttpOperation";
// import { ITypeTuple } from "../structures/ITypeTuple";
// import { ITypedHttpRoute } from "../structures/ITypedHttpRoute";
// import { GenericAnalyzer } from "./GenericAnalyzer";
// import { ImportAnalyzer } from "./ImportAnalyzer";

// export namespace ExceptionAnalyzer {
//   export const analyze =
//     (project: INestiaProject) =>
//     (props: {
//       generics: GenericAnalyzer.Dictionary;
//       imports: ImportAnalyzer.Dictionary;
//       controller: IReflectController;
//       operation: IReflectHttpOperation;
//       declaration: ts.MethodDeclaration;
//     }): Record<
//       number | "2XX" | "3XX" | "4XX" | "5XX",
//       ITypedHttpRoute.IOutput
//     > => {
//       const output: Record<
//         number | "2XX" | "3XX" | "4XX" | "5XX",
//         ITypedHttpRoute.IOutput
//       > = {} as any;
//       for (const decorator of props.declaration.modifiers ?? [])
//         if (ts.isDecorator(decorator))
//           analyzeTyped(project)({
//             ...props,
//             output,
//             decorator,
//           });
//       return output;
//     };

//   const analyzeTyped =
//     (project: INestiaProject) =>
//     (props: {
//       generics: GenericAnalyzer.Dictionary;
//       imports: ImportAnalyzer.Dictionary;
//       controller: IReflectController;
//       operation: IReflectHttpOperation;
//       output: Record<
//         number | "2XX" | "3XX" | "4XX" | "5XX",
//         ITypedHttpRoute.IOutput
//       >;
//       decorator: ts.Decorator;
//     }): boolean => {
//       // CHECK DECORATOR
//       if (!ts.isCallExpression(props.decorator.expression)) return false;
//       else if ((props.decorator.expression.typeArguments ?? []).length !== 1)
//         return false;

//       // CHECK SIGNATURE
//       const signature: ts.Signature | undefined =
//         project.checker.getResolvedSignature(props.decorator.expression);
//       if (!signature || !signature.declaration) return false;
//       else if (
//         path
//           .resolve(signature.declaration.getSourceFile().fileName)
//           .indexOf(TYPED_EXCEPTION_PATH) === -1
//       )
//         return false;

//       // GET TYPE INFO
//       const status: string | null = getStatus(project.checker)(
//         props.decorator.expression.arguments[0] ?? null,
//       );
//       if (status === null) return false;

//       const node: ts.TypeNode = props.decorator.expression.typeArguments![0];
//       const type: ts.Type = project.checker.getTypeFromTypeNode(node);
//       if (type.isTypeParameter()) {
//         project.errors.push({
//           file: props.controller.file,
//           controller: props.controller.name,
//           function: props.operation.name,
//           message: "TypedException() without generic argument specification.",
//         });
//         return false;
//       }

//       const tuple: ITypeTuple | null = ImportAnalyzer.analyze(project.checker)({
//         generics: props.generics,
//         imports: props.imports,
//         type,
//       });
//       if (tuple === null) {
//         project.errors.push({
//           file: props.controller.file,
//           controller: props.controller.name,
//           function: props.operation.name,
//           message: `TypeException() with unknown type on ${status} status.`,
//         });
//         return false;
//       }

//       // DO ASSIGN
//       const matched: IReflectHttpOperation.IException[] = Object.entries(
//         props.operation.exceptions,
//       )
//         .filter(([key]) => status === key)
//         .map(([_key, value]) => value);
//       for (const m of matched)
//         props.output[m.status] = {
//           type: tuple.type,
//           typeName: tuple.typeName,
//           contentType: "application/json",
//           description: m.description,
//         };
//       return true;
//     };

//   const getStatus =
//     (checker: ts.TypeChecker) =>
//     (expression: ts.Expression | null): string | null => {
//       if (expression === null) return null;

//       const type: ts.Type = checker.getTypeAtLocation(expression);
//       const result = MetadataFactory.analyze(checker)({
//         escape: true,
//         constant: true,
//         absorb: true,
//       })(new MetadataCollection())(type);
//       if (false === result.success) return null;

//       const meta: Metadata = result.data;
//       if (meta.constants.length === 1)
//         return meta.constants[0].values[0].value.toString();
//       else if (meta.escaped && meta.escaped.returns.constants.length === 1)
//         return meta.escaped.returns.constants[0].values[0].value.toString();
//       else if (ts.isStringLiteral(expression)) return expression.text;
//       else if (ts.isNumericLiteral(expression)) {
//         const value: number = Number(expression.text.split("_").join(""));
//         if (false === isNaN(value)) return value.toString();
//       }
//       return null;
//     };
// }

// const TYPED_EXCEPTION_PATH = path.join(
//   "node_modules",
//   "@nestia",
//   "core",
//   "lib",
//   "decorators",
//   "TypedException.d.ts",
// );