/********************************************************************
 * COPYRIGHT: 
 * Copyright (c) 2002-2005, International Business Machines Corporation and
 * others. All Rights Reserved.
 ********************************************************************/

/**
 * UCAConformanceTest performs conformance tests defined in the data
 * files. ICU ships with stub data files, as the whole test are too 
 * long. To do the whole test, download the test files.
 */

#include "unicode/utypes.h"

#if !UCONFIG_NO_COLLATION

#include "ucaconf.h"
#include "unicode/ustring.h"
#include "cstring.h"
#include "uparse.h"

UCAConformanceTest::UCAConformanceTest() :
rbUCA(NULL),
testFile(NULL),
status(U_ZERO_ERROR)
{
  UCA = ucol_open("root", &status);
  if(U_FAILURE(status)) {
    errln("ERROR - UCAConformanceTest: Unable to open UCA collator!");
  }

  const char *srcDir = IntlTest::getSourceTestData(status);
  if (U_FAILURE(status)) {
    errln("ERROR: could not open test data %s", u_errorName(status));
    return;
  }
  uprv_strcpy(testDataPath, srcDir);
  uprv_strcat(testDataPath, "CollationTest_");
}

UCAConformanceTest::~UCAConformanceTest()
{
  ucol_close(UCA);
  if(rbUCA) {
    ucol_close(rbUCA);
  }
  if(testFile) {
    fclose(testFile);
  }
}

void UCAConformanceTest::runIndexedTest( int32_t index, UBool exec, const char* &name, char* /*par */)
{
    if (exec) logln("TestSuite UCAConformanceTest: ");
    if(U_SUCCESS(status)) {
      switch (index) {
          case 0: name = "TestTableNonIgnorable"; if (exec)   TestTableNonIgnorable(/* par */); break;
          case 1: name = "TestTableShifted";      if (exec)   TestTableShifted(/* par */);      break;
          case 2: name = "TestRulesNonIgnorable"; if (exec)   TestRulesNonIgnorable(/* par */); break;
          case 3: name = "TestRulesShifted";      if (exec)   TestRulesShifted(/* par */);      break;
          default: name = ""; break;
      }
    } else {
      name = "";
    }
}

static const int BUFFER_SIZE_ = 330000;
static UChar buffer[BUFFER_SIZE_];

void UCAConformanceTest::initRbUCA() 
{
  if(!rbUCA) {
    UParseError parseError;
    UChar      *ucarules = buffer;
    int32_t size = ucol_getRulesEx(UCA, UCOL_FULL_RULES, ucarules, 
                                   BUFFER_SIZE_);
    if (size > BUFFER_SIZE_) {
        ucarules = (UChar *)malloc(size * sizeof(UChar));
        size = ucol_getRulesEx(UCA, UCOL_FULL_RULES, ucarules, size);
    }
    rbUCA = ucol_openRules(ucarules, size, UCOL_DEFAULT, UCOL_TERTIARY, 
                          &parseError, &status);
    if (U_FAILURE(status)) {
        errln("Failure creating UCA rule-based collator: %s", u_errorName(status));
        return;
    }
  }
}

void UCAConformanceTest::setCollNonIgnorable(UCollator *coll) 
{
  ucol_setAttribute(coll, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
  ucol_setAttribute(coll, UCOL_CASE_FIRST, UCOL_OFF, &status);
  ucol_setAttribute(coll, UCOL_CASE_LEVEL, UCOL_OFF, &status);
  ucol_setAttribute(coll, UCOL_STRENGTH, UCOL_TERTIARY, &status);
  ucol_setAttribute(coll, UCOL_ALTERNATE_HANDLING, UCOL_NON_IGNORABLE, &status);
}

void UCAConformanceTest::setCollShifted(UCollator *coll) 
{
  ucol_setAttribute(coll, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
  ucol_setAttribute(coll, UCOL_CASE_FIRST, UCOL_OFF, &status);
  ucol_setAttribute(coll, UCOL_CASE_LEVEL, UCOL_OFF, &status);
  ucol_setAttribute(coll, UCOL_STRENGTH, UCOL_QUATERNARY, &status);
  ucol_setAttribute(coll, UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED, &status);
}

void UCAConformanceTest::openTestFile(const char *type)
{
  const char *ext = ".txt";
  if(testFile) {
    fclose(testFile);
  }
  char buffer[1024];
  uprv_strcpy(buffer, testDataPath);
  uprv_strcat(buffer, type);
  int32_t bufLen = (int32_t)uprv_strlen(buffer);

  // we try to open 3 files:
  // path/CollationTest_type.txt
  // path/CollationTest_type_SHORT.txt
  // path/CollationTest_type_STUB.txt
  // we are going to test with the first one that we manage to open.

  uprv_strcpy(buffer+bufLen, ext);

  testFile = fopen(buffer, "rb");

  if(testFile == 0) {
    uprv_strcpy(buffer+bufLen, "_SHORT");
    uprv_strcat(buffer, ext);
    testFile = fopen(buffer, "rb");

    if(testFile == 0) {
      uprv_strcpy(buffer+bufLen, "_STUB");
      uprv_strcat(buffer, ext);
      testFile = fopen(buffer, "rb");

      if (testFile == 0) {
        *(buffer+bufLen) = 0;
        errln("ERROR: could not open any of the conformance test files, tried opening base %s\n", buffer);
        return;        
      } else {
        infoln(
          "INFO: Working with the stub file.\n"
          "If you need the full conformance test, please\n"
          "download the appropriate data files from:\n"
          "http://dev.icu-project.org/cgi-bin/viewcvs.cgi/unicodetools/com/ibm/text/data/");
      }
    }
  }
}

void UCAConformanceTest::testConformance(UCollator *coll) 
{
  if(testFile == 0) {
    return;
  }

  int32_t line = 0;

  UChar b1[1024], b2[1024];
  char lineB[1024];
  UChar *buffer = b1, *oldB = NULL;
  uint8_t sk1[1024], sk2[1024];
  uint8_t *oldSk = NULL, *newSk = sk1;
  int32_t resLen = 0, oldLen = 0;
  int32_t buflen = 0, oldBlen = 0;
  uint32_t first = 0;
  uint32_t offset = 0;
  UnicodeString oldS, newS;


  while (fgets(lineB, 1024, testFile) != NULL) {
    offset = 0;

    line++;
    if(*lineB == 0 || strlen(lineB) < 3 || lineB[0] == '#') {
      continue;
    }
    offset = u_parseString(lineB, buffer, 1024, &first, &status);
    buflen = offset;
    buffer[offset++] = 0;

    resLen = ucol_getSortKey(coll, buffer, buflen, newSk, 1024);

    int32_t res = 0, cmpres = 0, cmpres2 = 0;

    if(oldSk != NULL) {
      res = strcmp((char *)oldSk, (char *)newSk);
      cmpres = ucol_strcoll(coll, oldB, oldBlen, buffer, buflen);
      cmpres2 = ucol_strcoll(coll, buffer, buflen, oldB, oldBlen);

      if(cmpres != -cmpres2) {
        errln("Compare result not symmetrical on line %i", line);
      }

      if(((res&0x80000000) != (cmpres&0x80000000)) || (res == 0 && cmpres != 0) || (res != 0 && cmpres == 0)) {
        errln("Difference between ucol_strcoll and sortkey compare on line %i", line);
        logln("Data line %s", lineB);
      }

      if(res > 0) {
        errln("Line %i is not greater or equal than previous line", line);
        logln("Data line %s", lineB);
        prettify(CollationKey(oldSk, oldLen), oldS);
        prettify(CollationKey(newSk, resLen), newS);
        logln("Keys: "+oldS+" and "+newS);
      } else if(res == 0) { /* equal */
        res = u_strcmpCodePointOrder(oldB, buffer);
        if (res == 0) {
          errln("Probable error in test file on line %i (comparing identical strings)", line);
          logln("Data line %s", lineB);
        } else if (res > 0) {
          errln("Sortkeys are identical, but code point comapare gives >0 on line %i", line);
          logln("Data line %s", lineB);
        }
      }
    }

    oldSk = newSk;
    oldLen = resLen;

    newSk = (newSk == sk1)?sk2:sk1;
    oldB = buffer;
    oldBlen = buflen;
    buffer = (buffer == b1)?b2:b1;
  }
}

void UCAConformanceTest::TestTableNonIgnorable(/* par */) {
  setCollNonIgnorable(UCA);
  openTestFile("NON_IGNORABLE");
  testConformance(UCA);
}

void UCAConformanceTest::TestTableShifted(/* par */) {
  setCollShifted(UCA);
  openTestFile("SHIFTED");
  testConformance(UCA);
}

void UCAConformanceTest::TestRulesNonIgnorable(/* par */) {
  initRbUCA();

  if(U_SUCCESS(status)) {
    setCollNonIgnorable(rbUCA);
    openTestFile("NON_IGNORABLE");
    testConformance(rbUCA);
  }
}

void UCAConformanceTest::TestRulesShifted(/* par */) {
  logln("This test is currently disabled, as it is impossible to "
    "wholly represent fractional UCA using tailoring rules.");
  return;

  initRbUCA();

  if(U_SUCCESS(status)) {
    setCollShifted(rbUCA);
    openTestFile("SHIFTED");
    testConformance(rbUCA);
  }
}

#endif /* #if !UCONFIG_NO_COLLATION */