#pragma once

#include "mount.h"


namespace mcc::traits
{

// template <typename T, mcc::MccMountType MOUNT_TYPE>
// concept mcc_mount_c = std::derived_from<T, mcc::MccMount<MOUNT_TYPE>>;

template <typename T>
concept mcc_mount_c = requires {
    typename T::mount_config_t;
    requires std::same_as<decltype(T::mountType), MccMountType>;
    requires std::derived_from<T, mcc::MccMount<T::mountType, typename T::mount_config_t>>;
};

}  // namespace mcc::traits

namespace mcc
{

class MccMountAbstractState
{
    std::function<void()> _getMountDataFunc{[]() {}};

public:
    typedef std::error_code mount_state_error_t;

    typedef std::function<void(const mount_state_error_t&)> enter_callback_t;
    typedef std::function<void(const mount_state_error_t&)> exit_callback_t;
    typedef std::function<void(const mount_state_error_t&)> error_callback_t;

    // helper
    static constexpr auto mcc_noop_callback = [](const mount_state_error_t&) {};

    MccMountAbstractState(traits::mcc_mount_c auto* mount_ptr,
                          std::convertible_to<enter_callback_t> auto&& enter_callback = mcc_noop_callback,
                          std::convertible_to<exit_callback_t> auto&& exit_callback = mcc_noop_callback,
                          std::convertible_to<error_callback_t> auto&& error_callback = mcc_noop_callback)
        : _enterCallback(std::forward<enter_callback_t>(enter_callback)),
          _exitCallback(std::forward<exit_callback_t>(exit_callback)),
          _errorCallback(std::forward<error_callback_t>(error_callback))
    {
        _getMountDataFunc = [&mount_ptr, this]() { auto mstate = mount_ptr->getMountData(); };
    }


    virtual ~MccMountAbstractState() = default;


    std::string_view ident() const
    {
        return "MCC-MOUNT-ABSTRACT-STATE";
    }


    void enter() {}

    void exit() {}

    // #ifdef __cpp_explicit_this_parameter
    // #if __cpp_explicit_this_parameter >= 202110L
    //     void aaa() {}
    // #endif
    // #endif

protected:
    enter_callback_t _enterCallback{[](const mount_state_error_t&) {}};
    exit_callback_t _exitCallback{[](const mount_state_error_t&) {}};
    error_callback_t _errorCallback{[](const mount_state_error_t&) {}};
};


/*  */
class MccMountStateIDLE
{
public:
    std::string_view ident() const
    {
        return "MCC-MOUNT-STATE-IDLE";
    }
};


/*  */
class MccMountStateStoping
{
public:
    typedef std::string state_data_t;

    MccMountStateStoping(traits::mcc_input_char_range auto const& reason) : _reason({reason.begin(), reason.end()}) {}

    MccMountStateStoping(const char* reason) : MccMountStateStoping(std::string_view{reason}) {}


    std::string_view ident() const
    {
        return "MCC-MOUNT-STATE-STOPING";
    }

    void enter() {}

    void exit() {}

    void stop() {}

    state_data_t stateData()
    {
        return _reason;
    }

protected:
    std::string _reason;
};


/*  */
class MccMountStateStopped
{
public:
    typedef std::string state_data_t;

    MccMountStateStopped(traits::mcc_input_char_range auto const& reason) : _reason({reason.begin(), reason.end()}) {}

    MccMountStateStopped(const char* reason) : MccMountStateStopped(std::string_view{reason}) {}


    std::string_view ident() const
    {
        return "MCC-MOUNT-STATE-STOPPED";
    }

    void enter() {}

    void exit() {}

    void stop() {}

    state_data_t stateData()
    {
        return _reason;
    }

protected:
    std::string _reason;
};



/*  */
class MccMountStateSlew
{
public:
    struct slew_state_params_t {
        MccCoordPairKind coordKind{MccCoordPairKind::COORDS_KIND_RADEC_APP};
        MccAngle x, y;  // according to 'coordKind'

        bool stop{false};  // stop after
    };

    MccMountStateSlew(traits::mcc_mount_c auto& mount,
                      const slew_state_params_t& params,
                      std::string_view ident = "MCC-MOUNT-STATE-SLEW")
        : _ident(ident)
    {
        _stopFunc = [&mount]() {
            //
            mount.setMountState(MccMountStateStopped("stop pointing"));
        };
    }

    std::string_view ident() const
    {
        return _ident;
    }

    void enter() {}

    void exit() {}

    void stop() {}

protected:
    std::string_view _ident;

    std::function<void()> _stopFunc;
};


template <MccMountType MOUNT_TYPE, std::derived_from<MccMountConfig> CONFIG_TYPE = MccMountConfig>
class MccMountStateSlew1 : public MccMount<MOUNT_TYPE, CONFIG_TYPE>::MccMountState
{
};

}  // namespace mcc