/**
 * Copyright (c) 2023-2026 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "partialExportClassGen.h"

#include "checker/ETSchecker.h"
#include "varbinder/ETSBinder.h"

namespace ark::es2panda::compiler {

static void GeneratePartialDeclForExported(const public_lib::Context *const ctx, ir::AstNode *const node)
{
    // NOTE (mmartin): handle interfaces
    if (node->IsClassDeclaration() && !node->AsClassDeclaration()->Definition()->IsModule()) {
        auto type = node->AsClassDeclaration()->Definition()->TsType()->AsETSObjectType();
        if (type->IsPartial()) {
            return;
        }
        ctx->GetChecker()->AsETSChecker()->CreatePartialType(type);
    }
    if (node->IsTSInterfaceDeclaration()) {
        auto type = node->AsTSInterfaceDeclaration()->TsType()->AsETSObjectType();
        if (type->IsPartial()) {
            return;
        }
        ctx->GetChecker()->AsETSChecker()->CreatePartialType(type);
    }
}

static void CreatePartialDecls(public_lib::Context *ctx, parser::Program *program, std::string_view phaseName)
{
    program->Ast()->TransformChildrenRecursively(
        [ctx, program](ir::AstNode *const ast) {
            if ((ast->IsClassDeclaration() || ast->IsTSInterfaceDeclaration()) &&
                (ast->IsExported() || ast->IsDefaultExported())) {
                auto *const savedProg = ctx->GetChecker()->VarBinder()->AsETSBinder()->Program();
                ctx->GetChecker()->VarBinder()->AsETSBinder()->SetProgram(program);
                GeneratePartialDeclForExported(ctx, ast);
                ctx->GetChecker()->VarBinder()->AsETSBinder()->SetProgram(savedProg);
            }

            return ast;
        },
        phaseName);
}

bool PartialExportClassGen::PerformForProgram(parser::Program *program)
{
    CreatePartialDecls(Context(), program, Name());
    return true;
}

}  // namespace ark::es2panda::compiler