// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
*   Copyright (C) 2003-2013, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
*******************************************************************************
*   file name:  testidn.cpp
*   encoding:   UTF-8
*   tab size:   8 (not used)
*   indentation:4
*
*   created on: 2003-02-06
*   created by: Ram Viswanadha
*
*   This program reads the rfc3454_*.txt files,
*   parses them, and extracts the data for Nameprep conformance.
*   It then preprocesses it and writes a binary file for efficient use
*   in various IDNA conversion processes.
*/

#include "unicode/utypes.h"

#if !UCONFIG_NO_IDNA && !UCONFIG_NO_TRANSLITERATION

#define USPREP_TYPE_NAMES_ARRAY

#include "unicode/uchar.h"
#include "unicode/putil.h"
#include "cmemory.h"
#include "cstring.h"
#include "unicode/udata.h"
#include "unicode/utf16.h"
#include "unewdata.h"
#include "uoptions.h"
#include "uparse.h"
#include "utrie.h"
#include "umutex.h"
#include "sprpimpl.h"
#include "testidna.h"
#include "punyref.h"
#include <stdlib.h>

UBool beVerbose=false, haveCopyright=true;

/* prototypes --------------------------------------------------------------- */


static void
parseMappings(const char *filename, UBool reportError,TestIDNA& test, UErrorCode *pErrorCode);

static void 
compareMapping(uint32_t codepoint, uint32_t* mapping, int32_t mapLength, 
               UStringPrepType option);

static void
compareFlagsForRange(uint32_t start, uint32_t end,UStringPrepType option);

static void
testAllCodepoints(TestIDNA& test);

static TestIDNA* pTestIDNA =nullptr;

static const char* fileNames[] = {
                                    "rfc3491.txt"
                                 };
static const UTrie *idnTrie              = nullptr;
static const int32_t *indexes            = nullptr;
static const uint16_t *mappingData       = nullptr;
/* -------------------------------------------------------------------------- */

/* file definitions */
#define DATA_TYPE "icu"

#define SPREP_DIR "sprep"

extern int
testData(TestIDNA& test) {
    char *basename=nullptr;
    UErrorCode errorCode=U_ZERO_ERROR;
    char *saveBasename =nullptr;

    LocalUStringPrepProfilePointer profile(usprep_openByType(USPREP_RFC3491_NAMEPREP, &errorCode));
    if(U_FAILURE(errorCode)){
        test.errcheckln(errorCode, "Failed to load IDNA data file. " + UnicodeString(u_errorName(errorCode)));
        return errorCode;
    }
    
    char* filename = static_cast<char*>(malloc(strlen(IntlTest::pathToDataDirectory()) * 1024));
    //TODO get the srcDir dynamically 
    const char *srcDir=IntlTest::pathToDataDirectory();

    idnTrie     = &profile->sprepTrie;
    indexes     = profile->indexes;
    mappingData = profile->mappingData;

    //initialize
    pTestIDNA = &test;
    
    /* prepare the filename beginning with the source dir */
    if(uprv_strchr(srcDir,U_FILE_SEP_CHAR) == nullptr){
        filename[0] = 0x2E;
        filename[1] = U_FILE_SEP_CHAR;
        uprv_strcpy(filename+2,srcDir);
    }else{
        uprv_strcpy(filename, srcDir);
    }
    basename=filename+uprv_strlen(filename);
    if(basename>filename && *(basename-1)!=U_FILE_SEP_CHAR) {
        *basename++=U_FILE_SEP_CHAR;
    }

    /* process unassigned */
    basename=filename+uprv_strlen(filename);
    if(basename>filename && *(basename-1)!=U_FILE_SEP_CHAR) {
        *basename++=U_FILE_SEP_CHAR;
    }
    
    /* first copy misc directory */
    saveBasename = basename;
    (void)saveBasename;    // Suppress set but not used warning.
    uprv_strcpy(basename,SPREP_DIR);
    basename = basename + uprv_strlen(SPREP_DIR);
    *basename++=U_FILE_SEP_CHAR;
    
    /* process unassigned */
    uprv_strcpy(basename,fileNames[0]);
    parseMappings(filename,true, test,&errorCode);
    if(U_FAILURE(errorCode)) {
        test.errln( "Could not open file %s for reading \n", filename);
        return errorCode;
    }

    testAllCodepoints(test);

    pTestIDNA = nullptr;
    free(filename);
    return errorCode;
}
U_CDECL_BEGIN

static void U_CALLCONV
strprepProfileLineFn(void * /*context*/,
              char *fields[][2], int32_t fieldCount,
              UErrorCode *pErrorCode) {
    uint32_t mapping[40];
    char *end, *map;
    uint32_t code;
    int32_t length;
   /*UBool* mapWithNorm = (UBool*) context;*/
    const char* typeName;
    uint32_t rangeStart=0,rangeEnd =0;
    const char *s;

    s = u_skipWhitespace(fields[0][0]);
    if (*s == '@') {
        /* a special directive introduced in 4.2 */
        return;
    }

    if(fieldCount != 3){
        *pErrorCode = U_INVALID_FORMAT_ERROR;
        return;
    }

    typeName = fields[2][0];
    map = fields[1][0];
   
    if(uprv_strstr(typeName, usprepTypeNames[USPREP_UNASSIGNED])!=nullptr){

        u_parseCodePointRange(s, &rangeStart,&rangeEnd, pErrorCode);

        /* store the range */
        compareFlagsForRange(rangeStart,rangeEnd,USPREP_UNASSIGNED);

    }else if(uprv_strstr(typeName, usprepTypeNames[USPREP_PROHIBITED])!=nullptr){

        u_parseCodePointRange(s, &rangeStart,&rangeEnd, pErrorCode);

        /* store the range */
        compareFlagsForRange(rangeStart,rangeEnd,USPREP_PROHIBITED);

    }else if(uprv_strstr(typeName, usprepTypeNames[USPREP_MAP])!=nullptr){
        /* get the character code, field 0 */
        code=(uint32_t)uprv_strtoul(s, &end, 16);

        /* parse the mapping string */
        length=u_parseCodePoints(map, mapping, sizeof(mapping)/4, pErrorCode);
        
        /* store the mapping */
        compareMapping(code,mapping, length,USPREP_MAP);

    }else{
        *pErrorCode = U_INVALID_FORMAT_ERROR;
    }

}

U_CDECL_END

static void
parseMappings(const char *filename,UBool reportError, TestIDNA& test, UErrorCode *pErrorCode) {
    char *fields[3][2];

    if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) {
        return;
    }

    u_parseDelimitedFile(filename, ';', fields, 3, strprepProfileLineFn, (void*)filename, pErrorCode);

    //fprintf(stdout,"Number of code points that have mappings with length >1 : %i\n",len);

    if(U_FAILURE(*pErrorCode) && (reportError || *pErrorCode!=U_FILE_ACCESS_ERROR)) {
        test.errln( "testidn error: u_parseDelimitedFile(\"%s\") failed - %s\n", filename, u_errorName(*pErrorCode));
    }
}


static inline UStringPrepType
getValues(uint32_t result, int32_t& value, UBool& isIndex){

    UStringPrepType type;

    if(result == 0){
        /* 
         * Initial value stored in the mapping table 
         * just return USPREP_TYPE_LIMIT .. so that
         * the source codepoint is copied to the destination
         */
        type = USPREP_TYPE_LIMIT;
        isIndex =false;
        value = 0;
    }else if(result >= _SPREP_TYPE_THRESHOLD){
        type = static_cast<UStringPrepType>(result - _SPREP_TYPE_THRESHOLD);
        isIndex =false;
        value = 0;
    }else{
        /* get the state */
        type = USPREP_MAP;
        /* ascertain if the value is index or delta */
        if(result & 0x02){
            isIndex = true;
            value = result  >> 2; //mask off the lower 2 bits and shift

        }else{
            isIndex = false;
            value = static_cast<int16_t>(result);
            value =  (value >> 2);

        }
        if((result>>2) == _SPREP_MAX_INDEX_VALUE){
            type = USPREP_DELETE;
            isIndex =false;
            value = 0;
        }
    }
    return type;
}



static void
testAllCodepoints(TestIDNA& test){
    /*
    {
        char16_t str[19] = {
                            0xC138, 0xACC4, 0xC758, 0xBAA8, 0xB4E0, 0xC0AC, 0xB78C, 0xB4E4, 0xC774,
                            0x070F,//prohibited
                            0xD55C, 0xAD6D, 0xC5B4, 0xB97C, 0xC774, 0xD574, 0xD55C, 0xB2E4, 0xBA74
                        };
        uint32_t in[19] = {0};
        UErrorCode status = U_ZERO_ERROR;
        int32_t inLength=0, outLength=100;
        char output[100] = {0};
        punycode_status error;
        u_strToUTF32((UChar32*)in,19,&inLength,str,19,&status);

        error= punycode_encode(inLength, in, nullptr, (uint32_t*)&outLength, output);
        printf(output);

    }
    */

    uint32_t i = 0;
    int32_t unassigned      = 0;
    int32_t prohibited      = 0;
    int32_t mappedWithNorm  = 0;
    int32_t mapped          = 0;
    int32_t noValueInTrie   = 0;

    UStringPrepType type;
    int32_t value;
    UBool isIndex = false;

    for(i=0;i<=0x10FFFF;i++){
        uint32_t result = 0;
        UTRIE_GET16(idnTrie,i, result);
        type = getValues(result,value, isIndex);
        if(type != USPREP_TYPE_LIMIT ){
            if(type == USPREP_UNASSIGNED){
                unassigned++;
            }
            if(type == USPREP_PROHIBITED){
                prohibited++;
            }
            if(type == USPREP_MAP){
                mapped++;
            }
        }else{
            noValueInTrie++;
            if(result > 0){
                test.errln("The return value for 0x%06X is wrong. %i\n",i,result);
            }
        }
    }

    test.logln("Number of Unassigned code points : %i \n",unassigned);
    test.logln("Number of Prohibited code points : %i \n",prohibited);
    test.logln("Number of Mapped code points : %i \n",mapped);
    test.logln("Number of Mapped with NFKC code points : %i \n",mappedWithNorm);
    test.logln("Number of code points that have no value in Trie: %i \n",noValueInTrie);

    
}

static void 
compareMapping(uint32_t codepoint, uint32_t* mapping,int32_t mapLength, 
               UStringPrepType type){
    uint32_t result = 0;
    UTRIE_GET16(idnTrie,codepoint, result);

    int32_t length=0;
    UBool isIndex;
    UStringPrepType retType;
    int32_t value, index=0, delta=0;
  
    retType = getValues(result,value,isIndex);


    if(type != retType && retType != USPREP_DELETE){

        pTestIDNA->errln( "Did not get the assigned type for codepoint 0x%08X. Expected: %i Got: %i\n",codepoint, USPREP_MAP, type);

    }

    if(isIndex){
        index = value;
        if(index >= indexes[_SPREP_ONE_UCHAR_MAPPING_INDEX_START] &&
                 index < indexes[_SPREP_TWO_UCHARS_MAPPING_INDEX_START]){
            length = 1;
        }else if(index >= indexes[_SPREP_TWO_UCHARS_MAPPING_INDEX_START] &&
                 index < indexes[_SPREP_THREE_UCHARS_MAPPING_INDEX_START]){
            length = 2;
        }else if(index >= indexes[_SPREP_THREE_UCHARS_MAPPING_INDEX_START] &&
                 index < indexes[_SPREP_FOUR_UCHARS_MAPPING_INDEX_START]){
            length = 3;
        }else{
            length = mappingData[index++];
        }
    }else{
        delta = value;
        length = (retType == USPREP_DELETE)? 0 :  1;
    }

    int32_t realLength =0;
    /* figure out the real length */ 
    for(int32_t j=0; j<mapLength; j++){
        if(mapping[j] > 0xFFFF){
            realLength +=2;
        }else{
            realLength++;
        }      
    }

    if(realLength != length){
        pTestIDNA->errln( "Did not get the expected length. Expected: %i Got: %i\n", mapLength, length);
    }
    
    if(isIndex){
        for(int8_t i =0; i< mapLength; i++){
            if(mapping[i] <= 0xFFFF){
                if (mappingData[index + i] != static_cast<uint16_t>(mapping[i])) {
                    pTestIDNA->errln("Did not get the expected result. Expected: 0x%04X Got: 0x%04X \n", mapping[i], mappingData[index+i]);
                }
            }else{
                char16_t lead  = U16_LEAD(mapping[i]);
                char16_t trail = U16_TRAIL(mapping[i]);
                if(mappingData[index+i] != lead ||
                    mappingData[index+i+1] != trail){
                    pTestIDNA->errln( "Did not get the expected result. Expected: 0x%04X 0x%04X  Got: 0x%04X 0x%04X", lead, trail, mappingData[index+i], mappingData[index+i+1]);
                }
            }
        }
    }else{
        if (retType != USPREP_DELETE && (codepoint - delta) != static_cast<uint16_t>(mapping[0])) {
            pTestIDNA->errln("Did not get the expected result. Expected: 0x%04X Got: 0x%04X \n", mapping[0],(codepoint-delta));
        }
    }

}

static void
compareFlagsForRange(uint32_t start, uint32_t end,
                     UStringPrepType type){

    uint32_t result =0 ;
    UStringPrepType retType;
    UBool isIndex=false;
    int32_t value=0;
/*
    // supplementary code point 
    char16_t __lead16=U16_LEAD(0x2323E);
    int32_t __offset;

    // get data for lead surrogate 
    (result)=_UTRIE_GET_RAW((&idnTrie), index, 0, (__lead16));
    __offset=(&idnTrie)->getFoldingOffset(result);

    // get the real data from the folded lead/trail units 
    if(__offset>0) {
        (result)=_UTRIE_GET_RAW((&idnTrie), index, __offset, (0x2323E)&0x3ff);
    } else {
        (result)=(uint32_t)((&idnTrie)->initialValue);
    }

    UTRIE_GET16(&idnTrie,0x2323E, result);
*/
    while(start < end+1){
        UTRIE_GET16(idnTrie,start, result);
        retType = getValues(result,value,isIndex);
        if(result > _SPREP_TYPE_THRESHOLD){
            if(retType != type){
                pTestIDNA->errln( "FAIL: Did not get the expected type for 0x%06X. Expected: %s Got: %s\n",start,usprepTypeNames[type], usprepTypeNames[retType]);
            }
        }else{
            if(type == USPREP_PROHIBITED && ((result & 0x01) != 0x01)){
                pTestIDNA->errln( "FAIL: Did not get the expected type for 0x%06X. Expected: %s Got: %s\n",start,usprepTypeNames[type], usprepTypeNames[retType]);
            }
        }

        start++;
    }
    
}


#endif /* #if !UCONFIG_NO_IDNA */

/*
 * Hey, Emacs, please set the following:
 *
 * Local Variables:
 * indent-tabs-mode: nil
 * End:
 *
 */