/******************************************************************************
 * $Id$
 *
 * Project:  GDAL Core
 * Purpose:  Read metadata (mainly the remote sensing imagery) from files of
 *           different providers like DigitalGlobe, GeoEye etc.
 * Author:   Dmitry Baryshnikov, polimax@mail.ru
 *
 ******************************************************************************
 * Copyright (c) 2014-2015, NextGIS info@nextgis.ru
 *
 * SPDX-License-Identifier: MIT
 ****************************************************************************/

#ifndef GDAL_MDREADER_H_INCLUDED
#define GDAL_MDREADER_H_INCLUDED

#include "cpl_port.h"
#include "gdal_priv.h"

#include <map>

#define MD_DOMAIN_IMD "IMD"         /**< image metadata section */
#define MD_DOMAIN_RPC "RPC"         /**< rpc metadata section */
#define MD_DOMAIN_IMAGERY "IMAGERY" /**< imagery metadata section */
#define MD_DOMAIN_DEFAULT ""        /**< default metadata section */

#define MD_NAME_ACQDATETIME                                                    \
    "ACQUISITIONDATETIME" /**< Acquisition Date Time property name. The time   \
                             should be in UTC */
#define MD_NAME_SATELLITE                                                      \
    "SATELLITEID" /**< Satellite identificator property name */
#define MD_NAME_CLOUDCOVER                                                     \
    "CLOUDCOVER" /**< Cloud coverage property name. The value between 0 - 100  \
                    or 999 if n/a */
#define MD_NAME_MDTYPE                                                         \
    "METADATATYPE" /**< Metadata reader type property name. The reader         \
                      processed this metadata */

#define MD_DATETIMEFORMAT "%Y-%m-%d %H:%M:%S" /**< Date time format */
#define MD_CLOUDCOVER_NA "999" /**< The value if cloud cover is n/a */

/**
 * RPC/RPB specific defines
 */

#define RPC_ERR_BIAS "ERR_BIAS"
#define RPC_ERR_RAND "ERR_RAND"
#define RPC_LINE_OFF "LINE_OFF"
#define RPC_SAMP_OFF "SAMP_OFF"
#define RPC_LAT_OFF "LAT_OFF"
#define RPC_LONG_OFF "LONG_OFF"
#define RPC_HEIGHT_OFF "HEIGHT_OFF"
#define RPC_LINE_SCALE "LINE_SCALE"
#define RPC_SAMP_SCALE "SAMP_SCALE"
#define RPC_LAT_SCALE "LAT_SCALE"
#define RPC_LONG_SCALE "LONG_SCALE"
#define RPC_HEIGHT_SCALE "HEIGHT_SCALE"
#define RPC_LINE_NUM_COEFF "LINE_NUM_COEFF"
#define RPC_LINE_DEN_COEFF "LINE_DEN_COEFF"
#define RPC_SAMP_NUM_COEFF "SAMP_NUM_COEFF"
#define RPC_SAMP_DEN_COEFF "SAMP_DEN_COEFF"

/* Optional */
#define RPC_MIN_LONG "MIN_LONG"
#define RPC_MIN_LAT "MIN_LAT"
#define RPC_MAX_LONG "MAX_LONG"
#define RPC_MAX_LAT "MAX_LAT"

/* Pleiades Neo nomenclature */
#define RPC_LAT_NUM_COEFF "LAT_NUM_COEFF"
#define RPC_LAT_DEN_COEFF "LAT_DEN_COEFF"
#define RPC_LON_NUM_COEFF "LON_NUM_COEFF"
#define RPC_LON_DEN_COEFF "LON_DEN_COEFF"

/**
 * Enumerator of metadata readers
 */

typedef enum
{
    MDR_None = 0x00000000,     /**< no reader */
    MDR_DG = 0x00000001,       /**< Digital Globe, METADATATYPE=DG */
    MDR_GE = 0x00000002,       /**< Geo Eye,       METADATATYPE=GE */
    MDR_OV = 0x00000004,       /**< Orb View,      METADATATYPE=OV */
    MDR_PLEIADES = 0x00000008, /**< Pleiades,      METADATATYPE=DIMAP */
    MDR_SPOT = 0x00000010,     /**< Spot,          METADATATYPE=DIMAP */
    MDR_RDK1 = 0x00000020,     /**< Resurs DK1,    METADATATYPE=MSP */
    MDR_LS = 0x00000040,       /**< Landsat,       METADATATYPE=ODL */
    MDR_RE = 0x00000080,       /**< RapidEye,      METADATATYPE=RE */
    MDR_KOMPSAT = 0x00000100,  /**< Kompsat,       METADATATYPE=KARI */
    MDR_EROS = 0x00000200,     /**< EROS,          METADATATYPE=EROS */
    MDR_ALOS = 0x00000400,     /**< ALOS,          METADATATYPE=ALOS */
    MDR_ANY = MDR_DG | MDR_GE | MDR_OV | MDR_PLEIADES | MDR_SPOT | MDR_RDK1 |
              MDR_LS | MDR_RE | MDR_KOMPSAT | MDR_EROS |
              MDR_ALOS /**< any reader */
} MDReaders;

/**
 * The base class for all metadata readers
 */
class CPL_DLL GDALMDReaderBase
{

    CPL_DISALLOW_COPY_ASSIGN(GDALMDReaderBase)

    static bool
    ReadXMLToListFirstPass(const CPLXMLNode *psNode,
                           std::map<std::string, int> &oMapCountKeysFull,
                           const std::string &osPrefixFull, int nDepth);

    char **ReadXMLToList(const CPLXMLNode *psNode, char **papszList,
                         const std::map<std::string, int> &oMapCountKeysFullRef,
                         std::map<std::string, int> &oMapCountKeysFull,
                         std::map<std::string, int> &oMapCountKeys,
                         const std::string &osPrefix,
                         const std::string &osPrefixFull);

  public:
    GDALMDReaderBase(const char *pszPath, char **papszSiblingFiles);
    virtual ~GDALMDReaderBase();

    /**
     * @brief Get specified metadata domain
     * @param pszDomain The metadata domain to return
     * @return List of metadata items
     */
    virtual char **GetMetadataDomain(const char *pszDomain);
    /**
     * @brief Fill provided metadata store class
     * @param poMDMD Metadata store class
     * @return true on success or false
     */
    virtual bool FillMetadata(GDALMultiDomainMetadata *poMDMD);
    /**
     * @brief Determine whether the input parameter correspond to the particular
     *        provider of remote sensing data completely
     * @return True if all needed sources files found
     */
    virtual bool HasRequiredFiles() const = 0;
    /**
     * @brief Get metadata file names. The caller become owner of returned list
     *        and have to free it via CSLDestroy.
     * @return A file name list
     */
    virtual char **GetMetadataFiles() const = 0;

  protected:
    /**
     * @brief Load metadata to the correspondent IMD, RPB, IMAGERY and DEFAULT
     *        domains
     */
    virtual void LoadMetadata();
    /**
     * @brief Convert string like 2012-02-25T00:25:59.9440000Z to time
     * @param pszDateTime String to convert
     * @return value in second sinc epoch 1970-01-01 00:00:00
     */
    virtual GIntBig GetAcquisitionTimeFromString(const char *pszDateTime);
    /**
     * @brief ReadXMLToList Transform xml to list of NULL terminated name=value
     *        strings
     * @param psNode A xml node to process
     * @param papszList A list to fill with name=value strings
     * @param pszName A name of parent node. For root xml node should be empty.
     *        If name is not empty, the sibling nodes will not proceed
     * @return An input list filled with values
     */
    virtual char **ReadXMLToList(CPLXMLNode *psNode, char **papszList,
                                 const char *pszName = "");
    /**
     * @brief AddXMLNameValueToList Execute from ReadXMLToList to add name and
     *        value to list. One can override this function for special
     *        processing input values before add to list.
     * @param papszList A list to fill with name=value strings
     * @param pszName A name to add
     * @param pszValue A value to add
     * @return An input list filled with values
     */
    virtual char **AddXMLNameValueToList(char **papszList, const char *pszName,
                                         const char *pszValue);

  protected:
    //! @cond Doxygen_Suppress
    char **m_papszIMDMD = nullptr;
    char **m_papszRPCMD = nullptr;
    char **m_papszIMAGERYMD = nullptr;
    char **m_papszDEFAULTMD = nullptr;
    bool m_bIsMetadataLoad = false;
    //! @endcond
};

/**
 * The metadata reader main class.
 * The main purpose of this class is to provide an correspondent reader
 * for provided path.
 */
class CPL_DLL GDALMDReaderManager
{

    CPL_DISALLOW_COPY_ASSIGN(GDALMDReaderManager)

  public:
    GDALMDReaderManager();
    virtual ~GDALMDReaderManager();

    /**
     * @brief Try to detect metadata reader correspondent to the provided
     *        datasource path
     * @param pszPath a path to GDALDataset
     * @param papszSiblingFiles file list for metadata search purposes
     * @param nType a preferable reader type (may be the OR of MDReaders)
     * @return an appropriate reader or NULL if no such reader or error.
     * The pointer delete by the GDALMDReaderManager, so the user have not
     * delete it.
     */
    virtual GDALMDReaderBase *GetReader(const char *pszPath,
                                        char **papszSiblingFiles,
                                        GUInt32 nType = MDR_ANY);

  protected:
    //! @cond Doxygen_Suppress
    GDALMDReaderBase *m_pReader = nullptr;
    //! @endcond
};

// misc
CPLString CPLStrip(const CPLString &osString, const char cChar);
CPLString CPLStripQuotes(const CPLString &osString);
char **GDALLoadRPBFile(const CPLString &osFilePath);
char CPL_DLL **GDALLoadRPCFile(const CPLString &osFilePath);
char **GDALLoadIMDFile(const CPLString &osFilePath);
bool GDALCheckFileHeader(const CPLString &soFilePath, const char *pszTestString,
                         int nBufferSize = 256);

CPLErr GDALWriteRPBFile(const char *pszFilename, char **papszMD);
CPLErr CPL_DLL GDALWriteRPCTXTFile(const char *pszFilename, char **papszMD);
CPLErr GDALWriteIMDFile(const char *pszFilename, char **papszMD);

#endif  // GDAL_MDREADER_H_INCLUDED