// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#pragma once

#include "devcontainer_global.h"

#include <utils/filepath.h>
#include <utils/result.h>

#include <map>
#include <optional>
#include <variant>
#include <vector>
#include <QDebug>
#include <QFile>
#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QJsonValue>
#include <QString>
#include <QVariant>

namespace DevContainer {

// Forward declarations
struct BuildOptions;
struct Mount;
struct DevContainerCommon;
struct NonComposeBase;
struct DockerfileContainer;
struct ImageContainer;
struct ComposeContainer;
struct Config;

// Enums
enum class ShutdownAction { None, StopContainer, StopCompose };

enum class WaitFor {
    InitializeCommand,
    OnCreateCommand,
    UpdateContentCommand,
    PostCreateCommand,
    PostStartCommand
};

enum class UserEnvProbe { None, LoginShell, LoginInteractiveShell, InteractiveShell };
enum class OnAutoForward { Notify, OpenBrowser, OpenBrowserOnce, OpenPreview, Silent, Ignore };
enum class MountType { Bind, Volume };

// Returns a string from the provided JSON value. Can modifiy the string to replace variables.
using JsonStringToString = std::function<QString(const QJsonValue &)>;

// Command can be string, array, or object of commands
using CommandMap = std::map<QString, std::variant<QString, QStringList>>;
using Command = std::variant<QString, QStringList, CommandMap>;

DEVCONTAINER_EXPORT Command
parseCommand(const QJsonValue &value, const JsonStringToString &jsonStringToString);

// Port attributes structure
struct PortAttributes
{
    OnAutoForward onAutoForward = OnAutoForward::Notify;
    bool elevateIfNeeded = false;
    QString label = "Application";
    bool requireLocalPort = false;
    std::optional<QString> protocol;

    static Utils::Result<PortAttributes> fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);
    static void visitStrings(std::function<void(QString &)> visitor);
};

// GPU requirements structure
struct DEVCONTAINER_EXPORT GpuRequirements
{
    struct GpuDetailedRequirements
    {
        std::optional<int> cores;
        std::optional<QString> memory;

        static GpuDetailedRequirements fromJson(
            const QJsonObject &json, const JsonStringToString &jsonStringToString);
    };

    std::variant<bool, QString, struct GpuDetailedRequirements> requirements;

    static GpuRequirements fromJson(
        const QJsonValue &json, const JsonStringToString &jsonStringToString);
};

// Host hardware requirements structure
struct DEVCONTAINER_EXPORT HostRequirements
{
    std::optional<int> cpus;
    std::optional<QString> memory;
    std::optional<QString> storage;
    std::optional<GpuRequirements> gpu;

    static HostRequirements fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);
};

// Secret metadata structure
struct DEVCONTAINER_EXPORT SecretMetadata
{
    std::optional<QString> description;
    std::optional<QString> documentationUrl;

    static SecretMetadata fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);
};

// Mount structure
struct DEVCONTAINER_EXPORT Mount
{
    MountType type;
    std::optional<QString> source;
    QString target;

    static Utils::Result<Mount> fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);

    static Utils::Result<std::variant<Mount, QString>> fromJsonVariant(
        const QJsonValue &value, const JsonStringToString &jsonStringToString);
};

// Build options structure
struct DEVCONTAINER_EXPORT BuildOptions
{
    std::optional<QString> target;
    std::map<QString, QString> args;
    std::optional<std::variant<QString, QStringList>> cacheFrom;
    QStringList options;

    static BuildOptions fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);
};

struct FeatureDependency
{
    QString id;
    QString version = "latest";
    std::map<QString, QJsonValue> options;

    static Utils::Result<FeatureDependency> fromJson(const QString &key, const QJsonObject &obj);
};

// Non-compose base structure
struct DEVCONTAINER_EXPORT NonComposeBase
{
    std::optional<std::variant<int, QString, QList<std::variant<int, QString>>>> appPort;
    std::optional<QStringList> runArgs;
    ShutdownAction shutdownAction = ShutdownAction::StopContainer;
    bool overrideCommand = true;
    QString workspaceFolder = "/devcontainer/workspace";
    std::optional<QString> workspaceMount;

    Utils::Result<> fromJson(const QJsonObject &json, const JsonStringToString &jsonStringToString);
};

// Dockerfile container structure
struct DEVCONTAINER_EXPORT DockerfileContainer : NonComposeBase
{
    QString dockerfile;
    //! Path that the Docker build command should be run from. Relative to the devcontainer.json file.
    QString context = ".";
    std::optional<BuildOptions> buildOptions;

    static Utils::Result<DockerfileContainer> fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);

    static bool isDockerfileContainer(const QJsonObject &json);
};

// Image container structure
struct DEVCONTAINER_EXPORT ImageContainer : NonComposeBase
{
    QString image;

    static Utils::Result<ImageContainer> fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);

    static bool isImageContainer(const QJsonObject &json);
};

// Compose container structure
struct DEVCONTAINER_EXPORT ComposeContainer
{
    QStringList dockerComposeFiles;
    QString service;
    std::optional<QStringList> runServices;
    QString workspaceFolder = "/devcontainer/workspace";
    ShutdownAction shutdownAction = ShutdownAction::StopCompose;
    bool overrideCommand = true;

    static Utils::Result<ComposeContainer> fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);

    static bool isComposeContainer(const QJsonObject &json);
};

// Dev container common structure
struct DEVCONTAINER_EXPORT DevContainerCommon
{
    std::optional<QString> schema;
    std::optional<QString> name;
    QList<FeatureDependency> features;
    std::optional<QStringList> overrideFeatureInstallOrder;
    std::map<QString, SecretMetadata> secrets;
    std::optional<QList<std::variant<int, QString>>> forwardPorts;
    std::map<QString, PortAttributes> portsAttributes;
    std::optional<PortAttributes> otherPortsAttributes;
    std::optional<bool> updateRemoteUserUID;
    std::map<QString, QString> containerEnv;
    std::optional<QString> containerUser;
    std::vector<std::variant<Mount, QString>> mounts;
    bool init;
    bool privileged;
    QStringList capAdd;
    QStringList securityOpt;
    std::map<QString, std::optional<QString>> remoteEnv;
    std::optional<QString> remoteUser;
    std::optional<Command> initializeCommand;
    std::optional<Command> onCreateCommand;
    std::optional<Command> updateContentCommand;
    std::optional<Command> postCreateCommand;
    std::optional<Command> postStartCommand;
    std::optional<Command> postAttachCommand;
    std::optional<WaitFor> waitFor;
    UserEnvProbe userEnvProbe = UserEnvProbe::LoginInteractiveShell;
    std::optional<HostRequirements> hostRequirements;
    QJsonObject customizations;
    QJsonObject additionalProperties;

    static Utils::Result<DevContainerCommon> fromJson(
        const QJsonObject &json, const JsonStringToString &jsonStringToString);
    static void visitStrings(std::function<void(QString &)> visitor);
};

// Complete DevContainer Configuration
struct DEVCONTAINER_EXPORT Config
{
    DevContainerCommon common;

    std::optional<std::variant<DockerfileContainer, ImageContainer, ComposeContainer>>
        containerConfig;

    static Utils::FilePath workspaceFolder(const Config &config);

    static Utils::Result<Config> fromJson(
        const QJsonObject &json, JsonStringToString jsonStringToString);
    static Utils::Result<Config> fromJson(
        const QByteArray &data, const JsonStringToString &jsonStringToString);

    static bool isValidConfigPath(
        const Utils::FilePath &workspaceFolder, const Utils::FilePath &configPath);
};

//! Returns a QJsonValue for the specified path. e.g.: customization(config, "qt-creator/device/mount-cmd-bridge")
DEVCONTAINER_EXPORT QJsonValue customization(const Config &config, const QString &path);

// QDebug stream operators for all DevContainer structures
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::OnAutoForward &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::ShutdownAction &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::WaitFor &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::UserEnvProbe &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::MountType &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::PortAttributes &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::GpuRequirements::GpuDetailedRequirements &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::GpuRequirements &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::HostRequirements &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::SecretMetadata &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::Mount &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const std::variant<DevContainer::Mount, QString> &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::BuildOptions &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::DockerfileContainer &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::ImageContainer &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::ComposeContainer &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::NonComposeBase &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::Command &cmd);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::DevContainerCommon &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::Config &value);
DEVCONTAINER_EXPORT QDebug operator<<(QDebug debug, const DevContainer::FeatureDependency &value);

} // namespace DevContainer