/**
 * This is the ProtoC compiler plugin.
 *
 * It only accepts stdin/stdout output according to the protocol
 * specified in [plugin.proto](https://github.com/google/protobuf/blob/master/src/google/protobuf/compiler/plugin.proto).
 */
import {ExportMap} from "./lib/ExportMap";
import {Utility} from "./lib/Utility";
import {CodeGeneratorRequest, CodeGeneratorResponse} from "google-protobuf/google/protobuf/compiler/plugin_pb";
import {FileDescriptorProto} from "google-protobuf/google/protobuf/descriptor_pb";

import {ProtoMsgTsdFormatter} from "./lib/format/ProtoMsgTsdFormatter";
import {ProtoSvcTsdFormatter} from "./lib/format/ProtoSvcTsdFormatter";
import {TplEngine} from "./lib/TplEngine";
import {ProtoIndexFormatter} from "./lib/format/ProtoIndexFormatter";

Utility.withAllStdIn((inputBuff: Buffer) => {

    try {
        const typedInputBuff = new Uint8Array((inputBuff as any).length);
        typedInputBuff.set(inputBuff);

        const codeGenRequest = CodeGeneratorRequest.deserializeBinary(typedInputBuff);
        const codeGenResponse = new CodeGeneratorResponse();
        const exportMap = new ExportMap();
        const fileNameToDescriptor: { [key: string]: FileDescriptorProto } = {};

        codeGenResponse.setSupportedFeatures(CodeGeneratorResponse.Feature.FEATURE_PROTO3_OPTIONAL);

        const isGrpcJs = ["generate_package_definition", "grpc_js"].indexOf(codeGenRequest.getParameter()) !== -1;

        codeGenRequest.getProtoFileList().forEach((protoFileDescriptor) => {
            fileNameToDescriptor[protoFileDescriptor.getName()] = protoFileDescriptor;
            exportMap.addFileDescriptor(protoFileDescriptor);
        });

        const filesList: string[] = [];
        const interfaces: string[] = [];

        codeGenRequest.getFileToGenerateList().forEach((fileName) => {
            // message part
            const msgFileName = Utility.filePathFromProtoWithoutExt(fileName);
            filesList.push(msgFileName);
            const msgTsdFile = new CodeGeneratorResponse.File();
            msgTsdFile.setName(msgFileName + ".d.ts");
            const msgModel = ProtoMsgTsdFormatter.format(fileNameToDescriptor[fileName], exportMap);
            msgTsdFile.setContent(TplEngine.render("msg_tsd", msgModel));
            codeGenResponse.addFile(msgTsdFile);

            const msgInterfaceFile = new CodeGeneratorResponse.File();
            msgInterfaceFile.setName(msgFileName + ".interface.ts");
            interfaces.push(msgFileName + ".interface");
            const msgInterfaceModel = ProtoMsgTsdFormatter.format(fileNameToDescriptor[fileName], exportMap, true);
            msgInterfaceFile.setContent(TplEngine.render("msg_tsd", msgInterfaceModel));
            codeGenResponse.addFile(msgInterfaceFile);

            // service part
            const fileDescriptorModel = ProtoSvcTsdFormatter.format(fileNameToDescriptor[fileName], exportMap, isGrpcJs);
            if (fileDescriptorModel != null) {
                const svcFileName = Utility.svcFilePathFromProtoWithoutExt(fileName);
                const svtTsdFile = new CodeGeneratorResponse.File();
                svtTsdFile.setName(svcFileName + ".d.ts");
                svtTsdFile.setContent(TplEngine.render("svc_tsd", fileDescriptorModel));
                codeGenResponse.addFile(svtTsdFile);
                // fileList.push(msgFileName);
            }
        });

        // message js index
        const indexJsOutput = ProtoIndexFormatter.format(filesList, "index_js");
        const indexJsFile = new CodeGeneratorResponse.File();
        indexJsFile.setName("index.js");
        indexJsFile.setContent(indexJsOutput);
        codeGenResponse.addFile(indexJsFile);

        // message ts index
        const indexTsOutput = ProtoIndexFormatter.format(filesList, "index_tsd");
        const indexTsdFile = new CodeGeneratorResponse.File();
        indexTsdFile.setName("index.d.ts");
        indexTsdFile.setContent(indexTsOutput);
        codeGenResponse.addFile(indexTsdFile);

        // interface index
        const interfaceTsOutput = ProtoIndexFormatter.format(interfaces, "index_tsd");
        const interfaceTsdFile = new CodeGeneratorResponse.File();
        interfaceTsdFile.setName("interfaces.ts");
        interfaceTsdFile.setContent(interfaceTsOutput);
        codeGenResponse.addFile(interfaceTsdFile);


        process.stdout.write(Buffer.from(codeGenResponse.serializeBinary()));
    } catch (err) {
        console.error("protoc-gen-ts error: " + err.stack + "\n");
        process.exit(1);
    }

});