///|/ Copyright (c) Prusa Research 2023 Tomáš Mészáros @tamasmeszaros
///|/
///|/ PrusaSlicer is released under the terms of the AGPLv3 or higher
///|/
#ifndef ARRANGESETTINGSVIEW_HPP
#define ARRANGESETTINGSVIEW_HPP

#include <string_view>
#include <array>

#include "libslic3r/StaticMap.hpp"

namespace Slic3r { namespace arr2 {

using namespace std::string_view_literals;

class ArrangeSettingsView
{
public:
    enum GeometryHandling { ghConvex, ghBalanced, ghAdvanced, ghCount };
    enum ArrangeStrategy { asAuto, asPullToCenter, asCount };
    enum XLPivots {
        xlpCenter,
        xlpRearLeft,
        xlpFrontLeft,
        xlpFrontRight,
        xlpRearRight,
        xlpRandom,
        xlpCount
    };

    virtual ~ArrangeSettingsView() = default;

    virtual float get_distance_from_objects() const = 0;
    virtual float get_distance_from_bed() const     = 0;
    virtual bool  is_rotation_enabled() const       = 0;

    virtual XLPivots         get_xl_alignment() const      = 0;
    virtual GeometryHandling get_geometry_handling() const = 0;
    virtual ArrangeStrategy  get_arrange_strategy() const  = 0;

    static constexpr std::string_view get_label(GeometryHandling v)
    {
        constexpr auto STR = std::array{
            "0"sv, // convex
            "1"sv, // balanced
            "2"sv, // advanced
            "-1"sv, // undefined
        };

        return STR[v];
    }

    static constexpr std::string_view get_label(ArrangeStrategy v)
    {
        constexpr auto STR = std::array{
            "0"sv, // auto
            "1"sv, // pulltocenter
            "-1"sv, // undefined
        };

        return STR[v];
    }

    static constexpr std::string_view get_label(XLPivots v)
    {
        constexpr auto STR = std::array{
            "0"sv, // center
            "1"sv, // rearleft
            "2"sv, // frontleft
            "3"sv, // frontright
            "4"sv, // rearright
            "5"sv, // random
            "-1"sv, // undefined
        };

        return STR[v];
    }

private:

    template<class EnumType, size_t N>
    using EnumMap = StaticMap<std::string_view, EnumType, N>;

    template<class EnumType, size_t N>
    static constexpr std::optional<EnumType> get_enumval(std::string_view str,
                                                         const EnumMap<EnumType, N> &emap)
    {
        std::optional<EnumType> ret;

        if (auto v = query(emap, str); v.has_value()) {
            ret = *v;
        }

        return ret;
    }

public:

    static constexpr std::optional<GeometryHandling> to_geometry_handling(std::string_view str)
    {
        return get_enumval(str, GeometryHandlingLabels);
    }

    static constexpr std::optional<ArrangeStrategy> to_arrange_strategy(std::string_view str)
    {
        return get_enumval(str, ArrangeStrategyLabels);
    }

    static constexpr std::optional<XLPivots> to_xl_pivots(std::string_view str)
    {
        return get_enumval(str, XLPivotsLabels);
    }

private:

    static constexpr const auto GeometryHandlingLabels = make_staticmap<std::string_view, GeometryHandling>({
        {"convex"sv, ghConvex},
        {"balanced"sv, ghBalanced},
        {"advanced"sv, ghAdvanced},

        {"0"sv, ghConvex},
        {"1"sv, ghBalanced},
        {"2"sv, ghAdvanced},
    });

    static constexpr const auto ArrangeStrategyLabels = make_staticmap<std::string_view, ArrangeStrategy>({
        {"auto"sv, asAuto},
        {"pulltocenter"sv, asPullToCenter},

        {"0"sv, asAuto},
        {"1"sv, asPullToCenter}
    });

    static constexpr const auto XLPivotsLabels = make_staticmap<std::string_view, XLPivots>({
        {"center"sv,     xlpCenter },
        {"rearleft"sv,   xlpRearLeft },
        {"frontleft"sv,  xlpFrontLeft },
        {"frontright"sv, xlpFrontRight },
        {"rearright"sv,  xlpRearRight },
        {"random"sv,     xlpRandom },

        {"0"sv, xlpCenter },
        {"1"sv, xlpRearLeft },
        {"2"sv, xlpFrontLeft },
        {"3"sv, xlpFrontRight },
        {"4"sv, xlpRearRight },
        {"5"sv, xlpRandom }
    });
};

class ArrangeSettingsDb: public ArrangeSettingsView
{
public:

    virtual void distance_from_obj_range(float &min, float &max) const = 0;
    virtual void distance_from_bed_range(float &min, float &max) const = 0;

    virtual ArrangeSettingsDb& set_distance_from_objects(float v) = 0;
    virtual ArrangeSettingsDb& set_distance_from_bed(float v) = 0;
    virtual ArrangeSettingsDb& set_rotation_enabled(bool v) = 0;

    virtual ArrangeSettingsDb& set_xl_alignment(XLPivots v) = 0;
    virtual ArrangeSettingsDb& set_geometry_handling(GeometryHandling v) = 0;
    virtual ArrangeSettingsDb& set_arrange_strategy(ArrangeStrategy v) = 0;

    struct Values {
        float d_obj = 6.f, d_bed = 0.f;
        bool rotations = false;
        XLPivots xl_align = XLPivots::xlpFrontLeft;
        GeometryHandling geom_handling = GeometryHandling::ghConvex;
        ArrangeStrategy  arr_strategy = ArrangeStrategy::asAuto;

        Values() = default;
        Values(const ArrangeSettingsView &sv)
        {
            d_bed = sv.get_distance_from_bed();
            d_obj = sv.get_distance_from_objects();
            arr_strategy = sv.get_arrange_strategy();
            geom_handling = sv.get_geometry_handling();
            rotations = sv.is_rotation_enabled();
            xl_align = sv.get_xl_alignment();
        }
    };

    virtual Values get_defaults() const { return {}; }

    ArrangeSettingsDb& set_from(const ArrangeSettingsView &sv)
    {
        set_distance_from_bed(sv.get_distance_from_bed());
        set_distance_from_objects(sv.get_distance_from_objects());
        set_arrange_strategy(sv.get_arrange_strategy());
        set_geometry_handling(sv.get_geometry_handling());
        set_rotation_enabled(sv.is_rotation_enabled());
        set_xl_alignment(sv.get_xl_alignment());

        return *this;
    }
};

class ArrangeSettings: public Slic3r::arr2::ArrangeSettingsDb
{
    ArrangeSettingsDb::Values m_v = {};

public:
    explicit ArrangeSettings(
        const ArrangeSettingsDb::Values &v = {})
        : m_v{v}
    {}

    explicit ArrangeSettings(const ArrangeSettingsView &v)
        : m_v{v}
    {}

    float get_distance_from_objects() const override { return m_v.d_obj; }
    float get_distance_from_bed() const override { return m_v.d_bed; }
    bool  is_rotation_enabled() const override { return m_v.rotations; }
    XLPivots get_xl_alignment() const override { return m_v.xl_align; }
    GeometryHandling get_geometry_handling() const override { return m_v.geom_handling; }
    ArrangeStrategy get_arrange_strategy() const override { return m_v.arr_strategy; }

    void distance_from_obj_range(float &min, float &max) const override { min = 0.f; max = 100.f; }
    void distance_from_bed_range(float &min, float &max) const override { min = 0.f; max = 100.f; }

    ArrangeSettings& set_distance_from_objects(float v) override { m_v.d_obj = v; return *this; }
    ArrangeSettings& set_distance_from_bed(float v) override { m_v.d_bed = v; return *this; }
    ArrangeSettings& set_rotation_enabled(bool v) override { m_v.rotations = v; return *this; }
    ArrangeSettings& set_xl_alignment(XLPivots v) override { m_v.xl_align = v; return *this; }
    ArrangeSettings& set_geometry_handling(GeometryHandling v) override { m_v.geom_handling = v; return *this; }
    ArrangeSettings& set_arrange_strategy(ArrangeStrategy v) override { m_v.arr_strategy = v; return *this; }

    auto & values() const { return m_v; }
    auto & values() { return m_v; }
};

}} // namespace Slic3r::arr2

#endif // ARRANGESETTINGSVIEW_HPP