/************************** BEGIN APIUI.h **************************/
/************************************************************************
 FAUST Architecture File
 Copyright (C) 2003-2017 GRAME, Centre National de Creation Musicale
 ---------------------------------------------------------------------
 This Architecture section is free software; you can redistribute it
 and/or modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 3 of
 the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; If not, see <http://www.gnu.org/licenses/>.

 EXCEPTION : As a special exception, you may create a larger work
 that contains this FAUST architecture section and distribute
 that work under terms of your choice, so long as this FAUST
 architecture section is not modified.
 ************************************************************************/

#ifndef API_UI_H
#define API_UI_H

#include <sstream>
#include <string>
#include <vector>
#include <stdio.h>
#include <map>

#include "faust/gui/meta.h"
#include "faust/gui/UI.h"
#include "faust/gui/PathBuilder.h"
#include "faust/gui/ValueConverter.h"

typedef unsigned int uint;

class APIUI : public PathBuilder, public Meta, public UI
{
    public:

        enum ItemType { kButton = 0, kCheckButton, kVSlider, kHSlider, kNumEntry, kHBargraph, kVBargraph };

    protected:

        enum Mapping { kLin = 0, kLog = 1, kExp = 2 };

        struct Item {
            std::string fPath;
            std::string fLabel;
            ValueConverter* fConversion;
            FAUSTFLOAT* fZone;
            FAUSTFLOAT fInit;
            FAUSTFLOAT fMin;
            FAUSTFLOAT fMax;
            FAUSTFLOAT fStep;
            ItemType fItemType;
        };
        std::vector<Item> fItems;

        std::vector<std::map<std::string, std::string> > fMetaData;
        std::vector<ZoneControl*> fAcc[3];
        std::vector<ZoneControl*> fGyr[3];

        // Screen color control
        // "...[screencolor:red]..." etc.
        bool fHasScreenControl;      // true if control screen color metadata
        ZoneReader* fRedReader;
        ZoneReader* fGreenReader;
        ZoneReader* fBlueReader;

        // Current values controlled by metadata
        std::string fCurrentUnit;
        int fCurrentScale;
        std::string fCurrentAcc;
        std::string fCurrentGyr;
        std::string fCurrentColor;
        std::string fCurrentTooltip;
        std::map<std::string, std::string> fCurrentMetadata;

        // Add a generic parameter
        virtual void addParameter(const char* label,
                                  FAUSTFLOAT* zone,
                                  FAUSTFLOAT init,
                                  FAUSTFLOAT min,
                                  FAUSTFLOAT max,
                                  FAUSTFLOAT step,
                                  ItemType type)
        {
            std::string path = buildPath(label);

            // handle scale metadata
            ValueConverter* converter = nullptr;
            switch (fCurrentScale) {
                case kLin:
                    converter = new LinearValueConverter(0, 1, min, max);
                    break;
                case kLog:
                    converter = new LogValueConverter(0, 1, min, max);
                    break;
                case kExp:
                    converter = new ExpValueConverter(0, 1, min, max);
                    break;
            }
            fCurrentScale = kLin;

            fItems.push_back({path, label, converter, zone, init, min, max, step, type });

            if (fCurrentAcc.size() > 0 && fCurrentGyr.size() > 0) {
                fprintf(stderr, "warning : 'acc' and 'gyr' metadata used for the same %s parameter !!\n", label);
            }

            // handle acc metadata "...[acc : <axe> <curve> <amin> <amid> <amax>]..."
            if (fCurrentAcc.size() > 0) {
                std::istringstream iss(fCurrentAcc);
                int axe, curve;
                double amin, amid, amax;
                iss >> axe >> curve >> amin >> amid >> amax;

                if ((0 <= axe) && (axe < 3) &&
                    (0 <= curve) && (curve < 4) &&
                    (amin < amax) && (amin <= amid) && (amid <= amax))
                {
                    fAcc[axe].push_back(new CurveZoneControl(zone, curve, amin, amid, amax, min, init, max));
                } else {
                    fprintf(stderr, "incorrect acc metadata : %s \n", fCurrentAcc.c_str());
                }
                fCurrentAcc = "";
            }

            // handle gyr metadata "...[gyr : <axe> <curve> <amin> <amid> <amax>]..."
            if (fCurrentGyr.size() > 0) {
                std::istringstream iss(fCurrentGyr);
                int axe, curve;
                double amin, amid, amax;
                iss >> axe >> curve >> amin >> amid >> amax;

                if ((0 <= axe) && (axe < 3) &&
                    (0 <= curve) && (curve < 4) &&
                    (amin < amax) && (amin <= amid) && (amid <= amax))
                {
                    fGyr[axe].push_back(new CurveZoneControl(zone, curve, amin, amid, amax, min, init, max));
                } else {
                    fprintf(stderr, "incorrect gyr metadata : %s \n", fCurrentGyr.c_str());
                }
                fCurrentGyr = "";
            }

            // handle screencolor metadata "...[screencolor:red|green|blue|white]..."
            if (fCurrentColor.size() > 0) {
                if ((fCurrentColor == "red") && (fRedReader == nullptr)) {
                    fRedReader = new ZoneReader(zone, min, max);
                    fHasScreenControl = true;
                } else if ((fCurrentColor == "green") && (fGreenReader == nullptr)) {
                    fGreenReader = new ZoneReader(zone, min, max);
                    fHasScreenControl = true;
                } else if ((fCurrentColor == "blue") && (fBlueReader == nullptr)) {
                    fBlueReader = new ZoneReader(zone, min, max);
                    fHasScreenControl = true;
                } else if ((fCurrentColor == "white") && (fRedReader == nullptr) && (fGreenReader == nullptr) && (fBlueReader == nullptr)) {
                    fRedReader = new ZoneReader(zone, min, max);
                    fGreenReader = new ZoneReader(zone, min, max);
                    fBlueReader = new ZoneReader(zone, min, max);
                    fHasScreenControl = true;
                } else {
                    fprintf(stderr, "incorrect screencolor metadata : %s \n", fCurrentColor.c_str());
                }
            }
            fCurrentColor = "";

            fMetaData.push_back(fCurrentMetadata);
            fCurrentMetadata.clear();
        }

        int getZoneIndex(std::vector<ZoneControl*>* table, int p, int val)
        {
            FAUSTFLOAT* zone = fItems[uint(p)].fZone;
            for (size_t i = 0; i < table[val].size(); i++) {
                if (zone == table[val][i]->getZone()) return int(i);
            }
            return -1;
        }

        void setConverter(std::vector<ZoneControl*>* table, int p, int val, int curve, double amin, double amid, double amax)
        {
            int id1 = getZoneIndex(table, p, 0);
            int id2 = getZoneIndex(table, p, 1);
            int id3 = getZoneIndex(table, p, 2);

            // Deactivates everywhere..
            if (id1 != -1) table[0][uint(id1)]->setActive(false);
            if (id2 != -1) table[1][uint(id2)]->setActive(false);
            if (id3 != -1) table[2][uint(id3)]->setActive(false);

            if (val == -1) { // Means: no more mapping...
                // So stay all deactivated...
            } else {
                int id4 = getZoneIndex(table, p, val);
                if (id4 != -1) {
                    // Reactivate the one we edit...
                  table[val][uint(id4)]->setMappingValues(curve, amin, amid, amax, fItems[uint(p)].fMin, fItems[uint(p)].fInit, fItems[uint(p)].fMax);
                  table[val][uint(id4)]->setActive(true);
                } else {
                    // Allocate a new CurveZoneControl which is 'active' by default
                    FAUSTFLOAT* zone = fItems[uint(p)].fZone;
                    table[val].push_back(new CurveZoneControl(zone, curve, amin, amid, amax, fItems[uint(p)].fMin, fItems[uint(p)].fInit, fItems[uint(p)].fMax));
                }
            }
        }

        void getConverter(std::vector<ZoneControl*>* table, int p, int& val, int& curve, double& amin, double& amid, double& amax)
        {
            int id1 = getZoneIndex(table, p, 0);
            int id2 = getZoneIndex(table, p, 1);
            int id3 = getZoneIndex(table, p, 2);

            if (id1 != -1) {
                val = 0;
                curve = table[val][uint(id1)]->getCurve();
                table[val][uint(id1)]->getMappingValues(amin, amid, amax);
            } else if (id2 != -1) {
                val = 1;
                curve = table[val][uint(id2)]->getCurve();
                table[val][uint(id2)]->getMappingValues(amin, amid, amax);
            } else if (id3 != -1) {
                val = 2;
                curve = table[val][uint(id3)]->getCurve();
                table[val][uint(id3)]->getMappingValues(amin, amid, amax);
            } else {
                val = -1; // No mapping
                curve = 0;
                amin = -100.;
                amid = 0.;
                amax = 100.;
            }
        }

    public:

        enum Type { kAcc = 0, kGyr = 1, kNoType };

        APIUI() : fHasScreenControl(false), fRedReader(nullptr), fGreenReader(nullptr), fBlueReader(nullptr), fCurrentScale(kLin)
        {}

        virtual ~APIUI()
        {
            for (const auto& it : fItems) delete it.fConversion;
            for (int i = 0; i < 3; i++) {
                for (const auto& it : fAcc[i]) delete it;
                for (const auto& it : fGyr[i]) delete it;
            }
            delete fRedReader;
            delete fGreenReader;
            delete fBlueReader;
        }

        // -- widget's layouts

        virtual void openTabBox(const char* label) { pushLabel(label); }
        virtual void openHorizontalBox(const char* label) { pushLabel(label); }
        virtual void openVerticalBox(const char* label) { pushLabel(label); }
        virtual void closeBox() { popLabel(); }

        // -- active widgets

        virtual void addButton(const char* label, FAUSTFLOAT* zone)
        {
            addParameter(label, zone, 0, 0, 1, 1, kButton);
        }

        virtual void addCheckButton(const char* label, FAUSTFLOAT* zone)
        {
            addParameter(label, zone, 0, 0, 1, 1, kCheckButton);
        }

        virtual void addVerticalSlider(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
        {
            addParameter(label, zone, init, min, max, step, kVSlider);
        }

        virtual void addHorizontalSlider(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
        {
            addParameter(label, zone, init, min, max, step, kHSlider);
        }

        virtual void addNumEntry(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
        {
            addParameter(label, zone, init, min, max, step, kNumEntry);
        }

        // -- passive widgets

        virtual void addHorizontalBargraph(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT min, FAUSTFLOAT max)
        {
            addParameter(label, zone, min, min, max, (max-min)/1000.0f, kHBargraph);
        }

        virtual void addVerticalBargraph(const char* label, FAUSTFLOAT* zone, FAUSTFLOAT min, FAUSTFLOAT max)
        {
            addParameter(label, zone, min, min, max, (max-min)/1000.0f, kVBargraph);
        }

        // -- soundfiles

        virtual void addSoundfile(const char* label, const char* filename, Soundfile** sf_zone) {}

        // -- metadata declarations

        virtual void declare(FAUSTFLOAT* zone, const char* key, const char* val)
        {
            // Keep metadata
            fCurrentMetadata[key] = val;

            if (strcmp(key, "scale") == 0) {
                if (strcmp(val, "log") == 0) {
                    fCurrentScale = kLog;
                } else if (strcmp(val, "exp") == 0) {
                    fCurrentScale = kExp;
                } else {
                    fCurrentScale = kLin;
                }
            } else if (strcmp(key, "unit") == 0) {
                fCurrentUnit = val;
            } else if (strcmp(key, "acc") == 0) {
                fCurrentAcc = val;
            } else if (strcmp(key, "gyr") == 0) {
                fCurrentGyr = val;
            } else if (strcmp(key, "screencolor") == 0) {
                fCurrentColor = val; // val = "red", "green", "blue" or "white"
            } else if (strcmp(key, "tooltip") == 0) {
                fCurrentTooltip = val;
            }
        }

        virtual void declare(const char* key, const char* val)
        {}

        //-------------------------------------------------------------------------------
        // Simple API part
        //-------------------------------------------------------------------------------
        int getParamsCount() { return int(fItems.size()); }

        int getParamIndex(const char* path)
        {
            auto it1 = find_if(fItems.begin(), fItems.end(), [=](const Item& it) { return it.fPath == std::string(path); });
            if (it1 != fItems.end()) {
                return int(it1 - fItems.begin());
            }

            auto it2 = find_if(fItems.begin(), fItems.end(), [=](const Item& it) { return it.fLabel == std::string(path); });
            if (it2 != fItems.end()) {
                return int(it2 - fItems.begin());
            }

            return -1;
        }
        const char* getParamAddress(int p) { return fItems[uint(p)].fPath.c_str(); }
        const char* getParamLabel(int p) { return fItems[uint(p)].fLabel.c_str(); }
        std::map<const char*, const char*> getMetadata(int p)
        {
            std::map<const char*, const char*> res;
            std::map<std::string, std::string> metadata = fMetaData[uint(p)];
            for (const auto& it : metadata) {
                res[it.first.c_str()] = it.second.c_str();
            }
            return res;
        }

        const char* getMetadata(int p, const char* key)
        {
            return (fMetaData[uint(p)].find(key) != fMetaData[uint(p)].end()) ? fMetaData[uint(p)][key].c_str() : "";
        }
        FAUSTFLOAT getParamMin(int p) { return fItems[uint(p)].fMin; }
        FAUSTFLOAT getParamMax(int p) { return fItems[uint(p)].fMax; }
        FAUSTFLOAT getParamStep(int p) { return fItems[uint(p)].fStep; }
        FAUSTFLOAT getParamInit(int p) { return fItems[uint(p)].fInit; }

        FAUSTFLOAT* getParamZone(int p) { return fItems[uint(p)].fZone; }

        FAUSTFLOAT getParamValue(int p) { return *fItems[uint(p)].fZone; }
        FAUSTFLOAT getParamValue(const char* path)
        {
            int index = getParamIndex(path);
            return (index >= 0) ? getParamValue(index) : FAUSTFLOAT(0);
        }

        void setParamValue(int p, FAUSTFLOAT v) { *fItems[uint(p)].fZone = v; }
        void setParamValue(const char* path, FAUSTFLOAT v)
        {
            int index = getParamIndex(path);
            if (index >= 0) setParamValue(index, v);
        #ifdef DEBUG
            if (index < 0) {
                fprintf(stderr, ">>## Unknown parameter at path = %s\n", (path == nullptr ? "NULL" : path));
            }
        #endif
        }

        double getParamRatio(int p) { return fItems[uint(p)].fConversion->faust2ui(*fItems[uint(p)].fZone); }
        void setParamRatio(int p, double r) { *fItems[uint(p)].fZone = FAUSTFLOAT(fItems[uint(p)].fConversion->ui2faust(r)); }

        double value2ratio(int p, double r)    { return fItems[uint(p)].fConversion->faust2ui(r); }
        double ratio2value(int p, double r)    { return fItems[uint(p)].fConversion->ui2faust(r); }

        /**
         * Return the control type (kAcc, kGyr, or -1) for a given parameter
         *
         * @param p - the UI parameter index
         *
         * @return the type
         */
        Type getParamType(int p)
        {
            if (p >= 0) {
                if (getZoneIndex(fAcc, p, 0) != -1
                    || getZoneIndex(fAcc, p, 1) != -1
                    || getZoneIndex(fAcc, p, 2) != -1) {
                    return kAcc;
                } else if (getZoneIndex(fGyr, p, 0) != -1
                           || getZoneIndex(fGyr, p, 1) != -1
                           || getZoneIndex(fGyr, p, 2) != -1) {
                    return kGyr;
                }
            }
            return kNoType;
        }

        /**
         * Return the Item type (kButton = 0, kCheckButton, kVSlider, kHSlider, kNumEntry, kHBargraph, kVBargraph) for a given parameter
         *
         * @param p - the UI parameter index
         *
         * @return the Item type
         */
        ItemType getParamItemType(int p)
        {
            return fItems[uint(p)].fItemType;
        }

        /**
         * Set a new value coming from an accelerometer, propagate it to all relevant FAUSTFLOAT* zones.
         *
         * @param acc - 0 for X accelerometer, 1 for Y accelerometer, 2 for Z accelerometer
         * @param value - the new value
         *
         */
        void propagateAcc(int acc, double value)
        {
            for (size_t i = 0; i < fAcc[acc].size(); i++) {
                fAcc[acc][i]->update(value);
            }
        }

        /**
         * Used to edit accelerometer curves and mapping. Set curve and related mapping for a given UI parameter.
         *
         * @param p - the UI parameter index
         * @param acc - 0 for X accelerometer, 1 for Y accelerometer, 2 for Z accelerometer (-1 means "no mapping")
         * @param curve - between 0 and 3
         * @param amin - mapping 'min' point
         * @param amid - mapping 'middle' point
         * @param amax - mapping 'max' point
         *
         */
        void setAccConverter(int p, int acc, int curve, double amin, double amid, double amax)
        {
            setConverter(fAcc, p, acc, curve, amin, amid, amax);
        }

        /**
         * Used to edit gyroscope curves and mapping. Set curve and related mapping for a given UI parameter.
         *
         * @param p - the UI parameter index
         * @param acc - 0 for X gyroscope, 1 for Y gyroscope, 2 for Z gyroscope (-1 means "no mapping")
         * @param curve - between 0 and 3
         * @param amin - mapping 'min' point
         * @param amid - mapping 'middle' point
         * @param amax - mapping 'max' point
         *
         */
        void setGyrConverter(int p, int gyr, int curve, double amin, double amid, double amax)
        {
            setConverter(fGyr, p, gyr, curve, amin, amid, amax);
        }

        /**
         * Used to edit accelerometer curves and mapping. Get curve and related mapping for a given UI parameter.
         *
         * @param p - the UI parameter index
         * @param acc - the acc value to be retrieved (-1 means "no mapping")
         * @param curve - the curve value to be retrieved
         * @param amin - the amin value to be retrieved
         * @param amid - the amid value to be retrieved
         * @param amax - the amax value to be retrieved
         *
         */
        void getAccConverter(int p, int& acc, int& curve, double& amin, double& amid, double& amax)
        {
            getConverter(fAcc, p, acc, curve, amin, amid, amax);
        }

        /**
         * Used to edit gyroscope curves and mapping. Get curve and related mapping for a given UI parameter.
         *
         * @param p - the UI parameter index
         * @param gyr - the gyr value to be retrieved (-1 means "no mapping")
         * @param curve - the curve value to be retrieved
         * @param amin - the amin value to be retrieved
         * @param amid - the amid value to be retrieved
         * @param amax - the amax value to be retrieved
         *
         */
        void getGyrConverter(int p, int& gyr, int& curve, double& amin, double& amid, double& amax)
        {
            getConverter(fGyr, p, gyr, curve, amin, amid, amax);
        }

        /**
         * Set a new value coming from an gyroscope, propagate it to all relevant FAUSTFLOAT* zones.
         *
         * @param gyr - 0 for X gyroscope, 1 for Y gyroscope, 2 for Z gyroscope
         * @param value - the new value
         *
         */
        void propagateGyr(int gyr, double value)
        {
            for (size_t i = 0; i < fGyr[gyr].size(); i++) {
                fGyr[gyr][i]->update(value);
            }
        }

        /**
         * Get the number of FAUSTFLOAT* zones controlled with the accelerometer
         *
         * @param acc - 0 for X accelerometer, 1 for Y accelerometer, 2 for Z accelerometer
         * @return the number of zones
         *
         */
        int getAccCount(int acc)
        {
            return (acc >= 0 && acc < 3) ? int(fAcc[acc].size()) : 0;
        }

        /**
         * Get the number of FAUSTFLOAT* zones controlled with the gyroscope
         *
         * @param gyr - 0 for X gyroscope, 1 for Y gyroscope, 2 for Z gyroscope
         * @param the number of zones
         *
         */
        int getGyrCount(int gyr)
        {
            return (gyr >= 0 && gyr < 3) ? int(fGyr[gyr].size()) : 0;
        }

        // getScreenColor() : -1 means no screen color control (no screencolor metadata found)
        // otherwise return 0x00RRGGBB a ready to use color
        int getScreenColor()
        {
            if (fHasScreenControl) {
                int r = (fRedReader) ? fRedReader->getValue() : 0;
                int g = (fGreenReader) ? fGreenReader->getValue() : 0;
                int b = (fBlueReader) ? fBlueReader->getValue() : 0;
                return (r<<16) | (g<<8) | b;
            } else {
                return -1;
            }
        }

};

#endif
/**************************  END  APIUI.h **************************/