/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 *
 * HDF is dual licensed: you can use it either under the terms of
 * the GPL, or the BSD license, at your option.
 * See the LICENSE file in the root of this repository for complete details.
 */

#include "codegen/java_client_interface_code_emitter.h"
#include "util/file.h"
#include "util/logger.h"

namespace OHOS {
namespace HDI {
bool JavaClientInterfaceCodeEmitter::ResolveDirectory(const String& targetDirectory)
{
    if (ast_->GetASTFileType() == ASTFileType::AST_IFACE ||
        ast_->GetASTFileType() == ASTFileType::AST_ICALLBACK) {
        directory_ = GetFilePath(targetDirectory);
    } else {
        return false;
    }

    if (!File::CreateParentDir(directory_)) {
        Logger::E("JavaClientInterfaceCodeEmitter", "Create '%s' failed!", directory_.string());
        return false;
    }

    return true;
}

void JavaClientInterfaceCodeEmitter::EmitCode()
{
    EmitInterfaceFile();
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceFile()
{
    String filePath = String::Format("%s/%s.java", directory_.string(), FileName(interfaceName_).string());
    File file(filePath, File::WRITE);
    StringBuilder sb;

    EmitLicense(sb);
    EmitPackage(sb);
    sb.Append("\n");
    EmitInterfaceImports(sb);
    sb.Append("\n");
    EmitInterfaceDefinition(sb);

    String data = sb.ToString();
    file.WriteData(data.string(), data.GetLength());
    file.Flush();
    file.Close();
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceImports(StringBuilder& sb)
{
    EmitInterfaceCorelibImports(sb);
    EmitInterfaceSelfDefinedTypeImports(sb);
    EmitInterfaceDBinderImports(sb);
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceCorelibImports(StringBuilder& sb)
{
    bool includeList = false;
    bool includeMap = false;

    const AST::TypeStringMap& types = ast_->GetTypes();
    for (const auto& pair : types) {
        AutoPtr<ASTType> type = pair.second;
        switch (type->GetTypeKind()) {
            case TypeKind::TYPE_LIST: {
                if (!includeList) {
                    sb.Append("import java.util.List;\n");
                    includeList = true;
                }
                break;
            }
            case TypeKind::TYPE_MAP: {
                if (!includeMap) {
                    sb.Append("import java.util.Map;\n");
                    sb.Append("import java.util.HashMap;\n");
                    includeMap = true;
                }
                break;
            }
            default:
                break;
        }
    }
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceDBinderImports(StringBuilder& sb)
{
    sb.Append("import ohos.rpc.IRemoteBroker;\n");
    sb.Append("import ohos.rpc.RemoteException;\n");
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceSelfDefinedTypeImports(StringBuilder& sb)
{
    for (const auto& importPair : ast_->GetImports()) {
        AutoPtr<AST> import = importPair.second;
        sb.AppendFormat("import %s;\n", import->GetFullName().string());
    }
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceDefinition(StringBuilder& sb)
{
    sb.AppendFormat("public interface %s extends IRemoteBroker {\n", interface_->GetName().string());
    EmitInterfaceMethods(sb, g_tab);
    sb.Append("}");
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceMethods(StringBuilder& sb, const String& prefix)
{
    for (size_t i = 0; i < interface_->GetMethodNumber(); i++) {
        AutoPtr<ASTMethod> method = interface_->GetMethod(i);
        EmitInterfaceMethod(method, sb, prefix);
        if (i + 1 < interface_->GetMethodNumber()) {
            sb.Append("\n");
        }
    }
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceMethod(const AutoPtr<ASTMethod>& method, StringBuilder& sb,
    const String& prefix)
{
    if (method->GetParameterNumber() == 0) {
        sb.Append(prefix).AppendFormat("int %s() throws RemoteException;\n", MethodName(method->GetName()).string());
    } else {
        StringBuilder paramStr;
        paramStr.Append(prefix).AppendFormat("int %s(", MethodName(method->GetName()).string());
        for (size_t i = 0; i < method->GetParameterNumber(); i++) {
            AutoPtr<ASTParameter> param = method->GetParameter(i);
            EmitInterfaceMethodParameter(param, paramStr, "");
            if (i + 1 < method->GetParameterNumber()) {
                paramStr.Append(", ");
            }
        }

        paramStr.Append(") throws RemoteException;");
        sb.Append(SpecificationParam(paramStr, prefix + g_tab));
        sb.Append("\n");
    }
}

void JavaClientInterfaceCodeEmitter::EmitInterfaceMethodParameter(const AutoPtr<ASTParameter>& param,
    StringBuilder& sb, const String& prefix)
{
    sb.Append(prefix).Append(param->EmitJavaParameter());
}
} // namespace HDI
} // namespace OHOS