/*
*******************************************************************************
*   Copyright (C) 1996-2003, International Business Machines
*   Corporation and others.  All Rights Reserved.
*******************************************************************************
* Modification History:
*
*   Date        Name        Description
*   06/24/99    helena      Integrated Alan's NF enhancements and Java2 bug fixes
*******************************************************************************
*/

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "unicode/unum.h"

#include "unicode/uloc.h"
#include "unicode/numfmt.h"
#include "unicode/decimfmt.h"
#include "unicode/rbnf.h"
#include "unicode/ustring.h"
#include "unicode/fmtable.h"
#include "unicode/dcfmtsym.h"
#include "cpputils.h"


U_NAMESPACE_USE


U_CAPI UNumberFormat* U_EXPORT2
unum_open(  UNumberFormatStyle    style,  
            const    UChar*    pattern,
            int32_t            patternLength,
            const    char*     locale,
            UParseError*       parseErr,
            UErrorCode*        status)
{
    
    if(U_FAILURE(*status))
    { 
        return 0;
    }
    if(style!=UNUM_IGNORE){
        UNumberFormat *retVal = 0;
        
        switch(style) {
        case UNUM_DECIMAL:
            if(locale == 0)
                retVal = (UNumberFormat*)NumberFormat::createInstance(*status);
            else
                retVal = (UNumberFormat*)NumberFormat::createInstance(Locale(locale),
                *status);
            break;
            
        case UNUM_CURRENCY:
            if(locale == 0)
                retVal = (UNumberFormat*)NumberFormat::createCurrencyInstance(*status);
            else
                retVal = (UNumberFormat*)NumberFormat::createCurrencyInstance(Locale(locale),
                *status);
            break;
            
        case UNUM_PERCENT:
            if(locale == 0)
                retVal = (UNumberFormat*)NumberFormat::createPercentInstance(*status);
            else
                retVal = (UNumberFormat*)NumberFormat::createPercentInstance(Locale(locale),
                *status);
            break;
            
        case UNUM_SCIENTIFIC:
            if(locale == 0)
                retVal = (UNumberFormat*)NumberFormat::createScientificInstance(*status);
            else
                retVal = (UNumberFormat*)NumberFormat::createScientificInstance(Locale(locale),
                *status);
            break;
            
        case UNUM_SPELLOUT:
#if U_HAVE_RBNF
            return (UNumberFormat*)new RuleBasedNumberFormat(URBNF_SPELLOUT, Locale(locale), *status);
#else
            // fall through
#endif
        default:
            *status = U_UNSUPPORTED_ERROR;
            return 0;
        }
        
        if(retVal == 0) {
            *status = U_MEMORY_ALLOCATION_ERROR;
            return 0;
        }
        
        return retVal;
    }else{
        /* we don't support RBNF patterns yet */
        UParseError tErr;
        int32_t len = (patternLength == -1 ? u_strlen(pattern) : patternLength);
        const UnicodeString pat((UChar*)pattern, len, len);
        DecimalFormatSymbols *syms = 0;
        
        if(parseErr==NULL){
            parseErr = &tErr;
        }
        
        if(locale == 0)
            syms = new DecimalFormatSymbols(*status);
        else
            syms = new DecimalFormatSymbols(Locale(locale),
            *status);
        
        if(syms == 0) {
            *status = U_MEMORY_ALLOCATION_ERROR;
            return 0;
        }
        
        DecimalFormat *fmt = 0;
        fmt = new DecimalFormat(pat, syms, *parseErr, *status);
        if(fmt == 0) {
            *status = U_MEMORY_ALLOCATION_ERROR;
            delete syms;
            return 0;
        }
        
        return (UNumberFormat*) fmt;
    }
}

U_CAPI void U_EXPORT2
unum_close(UNumberFormat* fmt)
{
    delete (NumberFormat*) fmt;
}

U_CAPI UNumberFormat* U_EXPORT2
unum_clone(const UNumberFormat *fmt,
       UErrorCode *status)
{
    if(U_FAILURE(*status))
        return 0;
    
    Format *res = ((DecimalFormat*)fmt)->clone();
    
    if(res == 0) {
        *status = U_MEMORY_ALLOCATION_ERROR;
        return 0;
    }
    
    return (UNumberFormat*) res;
}

U_CAPI int32_t U_EXPORT2
unum_format(    const    UNumberFormat*    fmt,
        int32_t            number,
        UChar*            result,
        int32_t            resultLength,
        UFieldPosition    *pos,
        UErrorCode*        status)
{
    if(U_FAILURE(*status))
        return -1;
    
    UnicodeString res;
    if(!(result==NULL && resultLength==0)) {
        // NULL destination for pure preflighting: empty dummy string
        // otherwise, alias the destination buffer
        res.setTo(result, 0, resultLength);
    }
    
    FieldPosition fp;
    
    if(pos != 0)
        fp.setField(pos->field);
    
    ((NumberFormat*)fmt)->format(number, res, fp);
    
    if(pos != 0) {
        pos->beginIndex = fp.getBeginIndex();
        pos->endIndex = fp.getEndIndex();
    }
    
    return res.extract(result, resultLength, *status);
}

U_CAPI int32_t U_EXPORT2
unum_formatDouble(    const    UNumberFormat*  fmt,
            double          number,
            UChar*          result,
            int32_t         resultLength,
            UFieldPosition  *pos, /* 0 if ignore */
            UErrorCode*     status)
{
 
  if(U_FAILURE(*status)) return -1;

  UnicodeString res;
  if(!(result==NULL && resultLength==0)) {
    // NULL destination for pure preflighting: empty dummy string
    // otherwise, alias the destination buffer
    res.setTo(result, 0, resultLength);
  }

  FieldPosition fp;
  
  if(pos != 0)
    fp.setField(pos->field);
  
  ((NumberFormat*)fmt)->format(number, res, fp);
  
  if(pos != 0) {
    pos->beginIndex = fp.getBeginIndex();
    pos->endIndex = fp.getEndIndex();
  }
  
  return res.extract(result, resultLength, *status);
}

U_CAPI int32_t U_EXPORT2
unum_parse(    const   UNumberFormat*  fmt,
        const   UChar*          text,
        int32_t         textLength,
        int32_t         *parsePos /* 0 = start */,
        UErrorCode      *status)
{
    if(U_FAILURE(*status))
        return 0;
    
    int32_t len = (textLength == -1 ? u_strlen(text) : textLength);
    const UnicodeString src((UChar*)text, len, len);
    ParsePosition pp;
    Formattable res;
    
    if(parsePos != 0)
        pp.setIndex(*parsePos);
    
    ((NumberFormat*)fmt)->parse(src, res, pp);
    
    if(parsePos != 0) {
        if(pp.getErrorIndex() == -1)
            *parsePos = pp.getIndex();
        else {
            *parsePos = pp.getErrorIndex();
            *status = U_PARSE_ERROR;
        }
    }
    
    /* return the actual type of the result, cast to a long */
    return (res.getType() == Formattable::kLong) 
        ? res.getLong() 
        : (int32_t) res.getDouble();
}

U_CAPI double U_EXPORT2
unum_parseDouble(    const   UNumberFormat*  fmt,
            const   UChar*          text,
            int32_t         textLength,
            int32_t         *parsePos /* 0 = start */,
            UErrorCode      *status)
{
    if(U_FAILURE(*status))
        return 0;
    
    int32_t len = (textLength < 0 ? u_strlen(text) : textLength);
    const UnicodeString src((UChar*)text, len, len);
    ParsePosition pp;
    Formattable res;
    
    if(parsePos != 0)
        pp.setIndex(*parsePos);
    
    ((NumberFormat*)fmt)->parse(src, res, pp);
    
    if(parsePos != 0) {
        if(pp.getErrorIndex() == -1)
            *parsePos = pp.getIndex();
        else {
            *parsePos = pp.getErrorIndex();
            *status = U_PARSE_ERROR;
        }
    }
    
    /* return the actual type of the result, cast to a double */
    return (res.getType() == Formattable::kDouble) 
        ? res.getDouble() 
        : (double) res.getLong();
}

U_CAPI const char* U_EXPORT2
unum_getAvailable(int32_t index)
{
    return uloc_getAvailable(index);
}

U_CAPI int32_t U_EXPORT2
unum_countAvailable()
{
    return uloc_countAvailable();
}

U_CAPI int32_t U_EXPORT2
unum_getAttribute(const UNumberFormat*          fmt,
          UNumberFormatAttribute  attr)
{
    switch(attr) {
    case UNUM_PARSE_INT_ONLY:
        return ((NumberFormat*)fmt)->isParseIntegerOnly();
        
    case UNUM_GROUPING_USED:
        return ((NumberFormat*)fmt)->isGroupingUsed();
        
    case UNUM_DECIMAL_ALWAYS_SHOWN:
        return ((DecimalFormat*)fmt)->isDecimalSeparatorAlwaysShown();    
        
    case UNUM_MAX_INTEGER_DIGITS:
        return ((NumberFormat*)fmt)->getMaximumIntegerDigits();
        
    case UNUM_MIN_INTEGER_DIGITS:
        return ((NumberFormat*)fmt)->getMinimumIntegerDigits();
        
    case UNUM_INTEGER_DIGITS:
        // TBD: what should this return?
        return ((NumberFormat*)fmt)->getMinimumIntegerDigits();
        
    case UNUM_MAX_FRACTION_DIGITS:
        return ((NumberFormat*)fmt)->getMaximumFractionDigits();
        
    case UNUM_MIN_FRACTION_DIGITS:
        return ((NumberFormat*)fmt)->getMinimumFractionDigits();
        
    case UNUM_FRACTION_DIGITS:
        // TBD: what should this return?
        return ((NumberFormat*)fmt)->getMinimumFractionDigits();
        
    case UNUM_MULTIPLIER:
        return ((DecimalFormat*)fmt)->getMultiplier();    
        
    case UNUM_GROUPING_SIZE:
        return ((DecimalFormat*)fmt)->getGroupingSize();    
        
    case UNUM_ROUNDING_MODE:
        return ((DecimalFormat*)fmt)->getRoundingMode();
        
    case UNUM_FORMAT_WIDTH:
        return ((DecimalFormat*)fmt)->getFormatWidth();
        
        /** The position at which padding will take place. */
    case UNUM_PADDING_POSITION:
        return ((DecimalFormat*)fmt)->getPadPosition();
        
    default:
        break;
    }
    return -1;
}

U_CAPI void U_EXPORT2
unum_setAttribute(    UNumberFormat*          fmt,
            UNumberFormatAttribute  attr,
            int32_t                 newValue)
{
    switch(attr) {
    case UNUM_PARSE_INT_ONLY:
        ((NumberFormat*)fmt)->setParseIntegerOnly((UBool)newValue);
        break;
        
    case UNUM_GROUPING_USED:
        ((NumberFormat*)fmt)->setGroupingUsed((UBool)newValue);
        break;
        
    case UNUM_DECIMAL_ALWAYS_SHOWN:
        ((DecimalFormat*)fmt)->setDecimalSeparatorAlwaysShown((UBool)newValue);
        break;
        
    case UNUM_MAX_INTEGER_DIGITS:
        ((NumberFormat*)fmt)->setMaximumIntegerDigits(newValue);
        break;
        
    case UNUM_MIN_INTEGER_DIGITS:
        ((NumberFormat*)fmt)->setMinimumIntegerDigits(newValue);
        break;
        
    case UNUM_INTEGER_DIGITS:
        ((NumberFormat*)fmt)->setMinimumIntegerDigits(newValue);
        ((NumberFormat*)fmt)->setMaximumIntegerDigits(newValue);
        break;
        
    case UNUM_MAX_FRACTION_DIGITS:
        ((NumberFormat*)fmt)->setMaximumFractionDigits(newValue);
        break;
        
    case UNUM_MIN_FRACTION_DIGITS:
        ((NumberFormat*)fmt)->setMinimumFractionDigits(newValue);
        break;
        
    case UNUM_FRACTION_DIGITS:
        ((NumberFormat*)fmt)->setMinimumFractionDigits(newValue);
        ((NumberFormat*)fmt)->setMaximumFractionDigits(newValue);
        break;
        
    case UNUM_MULTIPLIER:
        ((DecimalFormat*)fmt)->setMultiplier(newValue);    
        break;
        
    case UNUM_GROUPING_SIZE:
        ((DecimalFormat*)fmt)->setGroupingSize(newValue);    
        break;
        
    case UNUM_ROUNDING_MODE:
        ((DecimalFormat*)fmt)->setRoundingMode((DecimalFormat::ERoundingMode)newValue);
        break;
        
    case UNUM_FORMAT_WIDTH:
        ((DecimalFormat*)fmt)->setFormatWidth(newValue);
        break;
        
        /** The position at which padding will take place. */
    case UNUM_PADDING_POSITION:
        ((DecimalFormat*)fmt)->setPadPosition((DecimalFormat::EPadPosition)newValue);
        break;
        
    case UNUM_SECONDARY_GROUPING_SIZE:
        ((DecimalFormat*)fmt)->setSecondaryGroupingSize(newValue);
        break;
        
    default:
        /* Shouldn't get here anyway */
        break;
    }
}

U_CAPI double U_EXPORT2
unum_getDoubleAttribute(const UNumberFormat*          fmt,
          UNumberFormatAttribute  attr)
{
    if (attr == UNUM_ROUNDING_INCREMENT) {
        return ((DecimalFormat*)fmt)->getRoundingIncrement();
    } else {
        return -1.0;
    }
}

U_CAPI void U_EXPORT2
unum_setDoubleAttribute(    UNumberFormat*          fmt,
            UNumberFormatAttribute  attr,
            double                 newValue)
{
    if (attr == UNUM_ROUNDING_INCREMENT) {   
        ((DecimalFormat*)fmt)->setRoundingIncrement(newValue);
    }
}

U_CAPI int32_t U_EXPORT2
unum_getTextAttribute(const UNumberFormat*  fmt,
            UNumberFormatTextAttribute      tag,
            UChar*                          result,
            int32_t                         resultLength,
            UErrorCode*                     status)
{
    if(U_FAILURE(*status))
        return -1;
    
    UnicodeString res;
    if(!(result==NULL && resultLength==0)) {
        // NULL destination for pure preflighting: empty dummy string
        // otherwise, alias the destination buffer
        res.setTo(result, 0, resultLength);
    }
    
    switch(tag) {
    case UNUM_POSITIVE_PREFIX:
        ((DecimalFormat*)fmt)->getPositivePrefix(res);
        break;
        
    case UNUM_POSITIVE_SUFFIX:
        ((DecimalFormat*)fmt)->getPositiveSuffix(res);
        break;
        
    case UNUM_NEGATIVE_PREFIX:
        ((DecimalFormat*)fmt)->getNegativePrefix(res);
        break;
        
    case UNUM_NEGATIVE_SUFFIX:
        ((DecimalFormat*)fmt)->getNegativeSuffix(res);
        break;
        
    case UNUM_PADDING_CHARACTER:
        res = ((DecimalFormat*)fmt)->getPadCharacterString();
        break;
        
    case UNUM_CURRENCY_CODE:
        res = UnicodeString(((DecimalFormat*)fmt)->getCurrency());
        break;
        
    default:
        *status = U_UNSUPPORTED_ERROR;
        return -1;
    }
    
    return res.extract(result, resultLength, *status);
}

U_CAPI void U_EXPORT2
unum_setTextAttribute(    UNumberFormat*                    fmt,
            UNumberFormatTextAttribute      tag,
            const    UChar*                            newValue,
            int32_t                            newValueLength,
            UErrorCode                        *status)
{
    if(U_FAILURE(*status))
        return;
    
    int32_t len = (newValueLength == -1 ? u_strlen(newValue) : newValueLength);
    const UnicodeString val((UChar*)newValue, len, len);
    
    switch(tag) {
    case UNUM_POSITIVE_PREFIX:
        ((DecimalFormat*)fmt)->setPositivePrefix(val);
        break;
        
    case UNUM_POSITIVE_SUFFIX:
        ((DecimalFormat*)fmt)->setPositiveSuffix(val);
        break;
        
    case UNUM_NEGATIVE_PREFIX:
        ((DecimalFormat*)fmt)->setNegativePrefix(val);
        break;
        
    case UNUM_NEGATIVE_SUFFIX:
        ((DecimalFormat*)fmt)->setNegativeSuffix(val);
        break;
        
    case UNUM_PADDING_CHARACTER:
        ((DecimalFormat*)fmt)->setPadCharacter(*newValue);
        break;
        
    case UNUM_CURRENCY_CODE:
        ((DecimalFormat*)fmt)->setCurrency(newValue);
        break;
        
    default:
        *status = U_UNSUPPORTED_ERROR;
        break;
    }
}

U_CAPI int32_t U_EXPORT2
unum_toPattern(    const    UNumberFormat*          fmt,
        UBool                  isPatternLocalized,
        UChar*                  result,
        int32_t                 resultLength,
        UErrorCode*             status)
{
    if(U_FAILURE(*status))
        return -1;
    
    UnicodeString pat;
    if(!(result==NULL && resultLength==0)) {
        // NULL destination for pure preflighting: empty dummy string
        // otherwise, alias the destination buffer
        pat.setTo(result, 0, resultLength);
    }
    
    if(isPatternLocalized)
        ((DecimalFormat*)fmt)->toLocalizedPattern(pat);
    else
        ((DecimalFormat*)fmt)->toPattern(pat);
    
    return pat.extract(result, resultLength, *status);
}

U_CAPI int32_t U_EXPORT2
unum_getSymbol(UNumberFormat *fmt,
               UNumberFormatSymbol symbol,
               UChar *buffer,
               int32_t size,
               UErrorCode *status)
{
    if(status==NULL || U_FAILURE(*status)) {
        return 0;
    }
    
    if(fmt==NULL || (uint16_t)symbol>=UNUM_FORMAT_SYMBOL_COUNT) {
        *status=U_ILLEGAL_ARGUMENT_ERROR;
        return 0;
    }

    return ((const DecimalFormat *)fmt)->
      getDecimalFormatSymbols()->
        getConstSymbol((DecimalFormatSymbols::ENumberFormatSymbol)symbol).
          extract(buffer, size, *status);
}

U_CAPI void U_EXPORT2
unum_setSymbol(UNumberFormat *fmt,
               UNumberFormatSymbol symbol,
               const UChar *value,
               int32_t length,
               UErrorCode *status)
{
    if(status==NULL || U_FAILURE(*status)) {
        return;
    }
    
    if(fmt==NULL || (uint16_t)symbol>=UNUM_FORMAT_SYMBOL_COUNT || value==NULL || length<-1) {
        *status=U_ILLEGAL_ARGUMENT_ERROR;
        return;
    }
    
    DecimalFormatSymbols symbols(*((DecimalFormat *)fmt)->getDecimalFormatSymbols());
    symbols.setSymbol((DecimalFormatSymbols::ENumberFormatSymbol)symbol,
        UnicodeString(value, length));  /* UnicodeString can handle the case when length = -1. */
    ((DecimalFormat *)fmt)->setDecimalFormatSymbols(symbols);
}

U_CAPI void U_EXPORT2
unum_applyPattern(  UNumberFormat  *format,
                    UBool          localized,
                    const UChar    *pattern,
                    int32_t        patternLength,
                    UParseError    *parseError,
                    UErrorCode*    status)
{
    UErrorCode tStatus = U_ZERO_ERROR;
    UParseError tParseError;
    
    if(parseError == NULL){
        parseError = &tParseError;
    }
    
    if(status==NULL){
        status = &tStatus;
    }
    
    int32_t len = (patternLength == -1 ? u_strlen(pattern) : patternLength);
    const UnicodeString pat((UChar*)pattern, len, len);
    
    // Verify if the object passed is a DecimalFormat object
    if(((NumberFormat*)format)->getDynamicClassID()!= DecimalFormat::getStaticClassID()){
        *status = U_ILLEGAL_ARGUMENT_ERROR;
        return;
    }
    
    if(localized)
        ((DecimalFormat*)format)->applyLocalizedPattern(pat,*parseError, *status);
    else
        ((DecimalFormat*)format)->applyPattern(pat,*parseError, *status);
}

#endif /* #if !UCONFIG_NO_FORMATTING */