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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#include "core/hle/ipc_helpers.h"
#include "core/hle/service/pm/pm.h"
#include "core/hle/service/service.h"

namespace Service::PM {

namespace {

constexpr ResultCode ERROR_PROCESS_NOT_FOUND{ErrorModule::PM, 1};

constexpr u64 NO_PROCESS_FOUND_PID{0};

std::optional<Kernel::SharedPtr<Kernel::Process>> SearchProcessList(
    const std::vector<Kernel::SharedPtr<Kernel::Process>>& process_list,
    std::function<bool(const Kernel::SharedPtr<Kernel::Process>&)> predicate) {
    const auto iter = std::find_if(process_list.begin(), process_list.end(), predicate);

    if (iter == process_list.end()) {
        return std::nullopt;
    }

    return *iter;
}

} // Anonymous namespace

class BootMode final : public ServiceFramework<BootMode> {
public:
    explicit BootMode() : ServiceFramework{"pm:bm"} {
        static const FunctionInfo functions[] = {
            {0, &BootMode::GetBootMode, "GetBootMode"},
            {1, &BootMode::SetMaintenanceBoot, "SetMaintenanceBoot"},
        };
        RegisterHandlers(functions);
    }

private:
    void GetBootMode(Kernel::HLERequestContext& ctx) {
        LOG_DEBUG(Service_PM, "called");

        IPC::ResponseBuilder rb{ctx, 3};
        rb.Push(RESULT_SUCCESS);
        rb.PushEnum(boot_mode);
    }

    void SetMaintenanceBoot(Kernel::HLERequestContext& ctx) {
        LOG_DEBUG(Service_PM, "called");

        boot_mode = SystemBootMode::Maintenance;

        IPC::ResponseBuilder rb{ctx, 2};
        rb.Push(RESULT_SUCCESS);
    }

    SystemBootMode boot_mode = SystemBootMode::Normal;
};

class DebugMonitor final : public ServiceFramework<DebugMonitor> {
public:
    explicit DebugMonitor() : ServiceFramework{"pm:dmnt"} {
        // clang-format off
        static const FunctionInfo functions[] = {
            {0, nullptr, "GetDebugProcesses"},
            {1, nullptr, "StartDebugProcess"},
            {2, nullptr, "GetTitlePid"},
            {3, nullptr, "EnableDebugForTitleId"},
            {4, nullptr, "GetApplicationPid"},
            {5, nullptr, "EnableDebugForApplication"},
            {6, nullptr, "DisableDebug"},
        };
        // clang-format on

        RegisterHandlers(functions);
    }
};

class Info final : public ServiceFramework<Info> {
public:
    explicit Info(const std::vector<Kernel::SharedPtr<Kernel::Process>>& process_list)
        : ServiceFramework{"pm:info"}, process_list(process_list) {
        static const FunctionInfo functions[] = {
            {0, &Info::GetTitleId, "GetTitleId"},
        };
        RegisterHandlers(functions);
    }

private:
    void GetTitleId(Kernel::HLERequestContext& ctx) {
        IPC::RequestParser rp{ctx};
        const auto process_id = rp.PopRaw<u64>();

        LOG_DEBUG(Service_PM, "called, process_id={:016X}", process_id);

        const auto process = SearchProcessList(process_list, [process_id](const auto& process) {
            return process->GetProcessID() == process_id;
        });

        if (!process.has_value()) {
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ERROR_PROCESS_NOT_FOUND);
            return;
        }

        IPC::ResponseBuilder rb{ctx, 4};
        rb.Push(RESULT_SUCCESS);
        rb.Push((*process)->GetTitleID());
    }

    const std::vector<Kernel::SharedPtr<Kernel::Process>>& process_list;
};

class Shell final : public ServiceFramework<Shell> {
public:
    explicit Shell() : ServiceFramework{"pm:shell"} {
        // clang-format off
        static const FunctionInfo functions[] = {
            {0, nullptr, "LaunchProcess"},
            {1, nullptr, "TerminateProcessByPid"},
            {2, nullptr, "TerminateProcessByTitleId"},
            {3, nullptr, "GetProcessEventWaiter"},
            {4, nullptr, "GetProcessEventType"},
            {5, nullptr, "NotifyBootFinished"},
            {6, nullptr, "GetApplicationPid"},
            {7, nullptr, "BoostSystemMemoryResourceLimit"},
            {8, nullptr, "EnableAdditionalSystemThreads"},
        };
        // clang-format on

        RegisterHandlers(functions);
    }
};

void InstallInterfaces(SM::ServiceManager& sm) {
    std::make_shared<BootMode>()->InstallAsService(sm);
    std::make_shared<DebugMonitor>()->InstallAsService(sm);
    std::make_shared<Info>()->InstallAsService(sm);
    std::make_shared<Shell>()->InstallAsService(sm);
}

} // namespace Service::PM