/**
 * Copyright (c) 2021-2026 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 "debuginfoDumper.h"

namespace panda::es2panda::debuginfo {

DebugInfoDumper::DebugInfoDumper(const pandasm::Program *prog) : prog_(prog) {}

static const char *PutComma(bool comma)
{
    return comma ? "," : "";
}

template <typename T>
void DebugInfoDumper::WrapArray(const char *name, const std::vector<T> &array, bool comma)
{
    ss_ << std::endl;
    Indent();
    ss_ << "\"" << name << "\": "
        << "[";

    if (array.empty()) {
        ss_ << "]" << PutComma(comma);
        return;
    }

    ss_ << "\n";
    indent_++;
    // dump VariableDebugInfo in reverse order to match ts2panda
    // NOLINTNEXTLINE
    if constexpr (std::is_same_v<T, pandasm::debuginfo::LocalVariable>) {
        typename std::vector<T>::const_reverse_iterator elem;
        for (elem = array.rbegin(); elem != array.rend(); ++elem) {
            Indent();
            WriteVariableInfo(*elem);
            (std::next(elem) == array.rend()) ? ss_ << "" : ss_ << ",";
            ss_ << "\n";
        }
        // NOLINTNEXTLINE
    } else {
        typename std::vector<T>::const_iterator elem;
        for (elem = array.begin(); elem != array.end(); ++elem) {
            Indent();
            // NOLINTNEXTLINE
            if constexpr (std::is_same_v<T, pandasm::InsPtr>) {
                WriteIns(*elem);
                // NOLINTNEXTLINE
            } else if constexpr (std::is_same_v<T, pandasm::Function::Parameter>) {
                ss_ << "\"" << (*elem).type.GetName() << "\"";
                // NOLINTNEXTLINE
            } else if constexpr (std::is_same_v<T, std::string>) {
                ss_ << "\"" << *elem << "\"";
                // NOLINTNEXTLINE
            } else if constexpr (std::is_same_v<T, std::variant<int64_t, double>>) {
                if (std::holds_alternative<int64_t>(*elem)) {
                    ss_ << std::to_string(std::get<int64_t>(*elem));
                } else {
                    ss_ << std::to_string(std::get<double>(*elem));
                }
                // NOLINTNEXTLINE
            } else {
                ss_ << std::to_string(*elem);
            }

            (std::next(elem) == array.end()) ? ss_ << "" : ss_ << ",";
            ss_ << "\n";
        }
    }

    indent_--;
    Indent();

    ss_ << "]" << PutComma(comma);
}

void DebugInfoDumper::WriteIns(const pandasm::InsPtr &ins)
{
    ss_ << "{";
    WriteProperty("opcode", ins->OpcodeToString());
    indent_++;
    WrapArray("regs", ins->Regs());
    WrapArray("ids", ins->Ids());
    WrapArray("imms", ins->Imms());
    ss_ << std::endl;
    Indent();
    ss_ << "\"label\": "
        << "\"" << (ins->IsLabel() ? ins->Label() : "") << "\",";
    WritePosInfo(ins->ins_debug);
    indent_--;
    Indent();
    ss_ << "}";
}

void DebugInfoDumper::WriteMetaData(const std::vector<pandasm::AnnotationData> &metaData)
{
    for (const auto &it : metaData) {
        for (const auto &elem : it.GetElements()) {
            pandasm::ScalarValue *value = elem.GetValue()->GetAsScalar();
            if (value->GetType() == pandasm::Value::Type::STRING) {
                WriteProperty(elem.GetName().c_str(), value->GetValue<std::string>(), false);
            } else if (value->GetType() == pandasm::Value::Type::U32) {
                WriteProperty(elem.GetName().c_str(), value->GetValue<size_t>());
            }
        }
    }
}

void DebugInfoDumper::WritePosInfo(const pandasm::debuginfo::Ins &posInfo)
{
    ss_ << std::endl;
    Indent();
    ss_ << "\"debug_pos_info\": {";
    WriteProperty("sourceLineNum", static_cast<int32_t>(posInfo.line_number), false);
    Indent();
    ss_ << "}" << std::endl;
}

void DebugInfoDumper::WriteVariableInfo(const pandasm::debuginfo::LocalVariable &localVariableDebug)
{
    ss_ << "{";
    WriteProperty("name", localVariableDebug.name);
    WriteProperty("signature", "any");
    WriteProperty("signatureType", "any");
    WriteProperty("reg", localVariableDebug.reg);
    WriteProperty("start", static_cast<size_t>(localVariableDebug.start));
    WriteProperty("length", static_cast<size_t>(localVariableDebug.length), false);
    Indent();
    ss_ << "}";
}

void DebugInfoDumper::Dump()
{
    ss_ << "{\n";
    indent_++;
    Indent();
    ss_ << "\"functions\": [" << std::endl;

    auto iter = prog_->function_table.begin();

    for (; iter != prog_->function_table.end(); ++iter) {
        indent_++;
        Indent();
        ss_ << "{";
        WriteProperty("name", iter->first);
        ss_ << std::endl;

        indent_++;
        Indent();
        ss_ << "\"signature\": {";
        WriteProperty("retType", iter->second.ReturnType().GetName());
        indent_++;
        WrapArray("params", iter->second.params, false);
        indent_ -= 2U;
        ss_ << std::endl;
        Indent();
        ss_ << "},";

        WrapArray("ins", iter->second.ins);
        WrapArray("variables", iter->second.local_variable_debug);
        WriteProperty("sourceFile", iter->second.source_file);
        WriteProperty("sourceCode", iter->second.source_code);
        // icSize - parameterLength - funcName
        WriteMetaData(iter->second.metadata->GetAnnotations());

        indent_--;
        Indent();
        ss_ << "}";

        if (std::next(iter) != prog_->function_table.end()) {
            ss_ << ",";
        }

        ss_ << std::endl;
    }

    indent_--;
    Indent();
    ss_ << "]" << std::endl;
    ss_ << "}";
    ss_ << std::endl;
    std::cout << ss_.str();
}

void DebugInfoDumper::WriteProperty(const char *key, const Value &value, bool comma)
{
    ss_ << std::endl;
    indent_++;
    Indent();
    ss_ << "\"" << key << "\": ";
    if (std::holds_alternative<std::string>(value)) {
        ss_ << "\"" << std::get<std::string>(value) << "\"";
    } else if (std::holds_alternative<size_t>(value)) {
        ss_ << std::to_string(std::get<size_t>(value));
    } else if (std::holds_alternative<int32_t>(value)) {
        ss_ << std::to_string(std::get<int32_t>(value));
    }

    comma ? ss_ << "," : ss_ << std::endl;
    indent_--;
}

void DebugInfoDumper::Indent()
{
    for (int32_t i = 0; i <= indent_; i++) {
        ss_ << "  ";
    }
}

}  // namespace panda::es2panda::debuginfo