/********************************************************************
 * COPYRIGHT: 
 * Copyright (c) 1997-1999, International Business Machines Corporation and
 * others. All Rights Reserved.
 ********************************************************************/

#include "nmfmtrt.h"

#include "unicode/dcfmtsym.h"
#include "unicode/decimfmt.h"
#include "unicode/locid.h"

#include <float.h>
#include <stdio.h>    // for sprintf
 
// *****************************************************************************
// class NumberFormatRoundTripTest
// *****************************************************************************

UBool NumberFormatRoundTripTest::verbose                    = FALSE;
UBool NumberFormatRoundTripTest::STRING_COMPARE            = TRUE;
UBool NumberFormatRoundTripTest::EXACT_NUMERIC_COMPARE        = FALSE;
UBool NumberFormatRoundTripTest::DEBUG                        = FALSE;
double NumberFormatRoundTripTest::MAX_ERROR                    = 1e-14;
double NumberFormatRoundTripTest::max_numeric_error            = 0.0;
double NumberFormatRoundTripTest::min_numeric_error            = 1.0;

#define CASE(id,test) case id: name = #test; if (exec) { logln(#test "---"); logln((UnicodeString)""); test(); } break;

void NumberFormatRoundTripTest::runIndexedTest( int32_t index, UBool exec, char* &name, char* par )
{
    // if (exec) logln((UnicodeString)"TestSuite NumberFormatRoundTripTest");
    switch (index) {
        CASE(0, start)
        default: name = ""; break;
    }
}

UBool 
NumberFormatRoundTripTest::failure(UErrorCode status, const char* msg)
{
    if(U_FAILURE(status)) {
        errln(UnicodeString("FAIL: ") + msg + " failed, error " + u_errorName(status));
        return TRUE;
    }

    return FALSE;
}
 
void 
NumberFormatRoundTripTest::start()
{
// test(NumberFormat.getInstance(new Locale("sr", "", "")));
    
    UErrorCode status = U_ZERO_ERROR;

    NumberFormat *fmt = NULL;

    logln("Default Locale");

    fmt = NumberFormat::createInstance(status);
    failure(status, "NumberFormat::createInstance");
    test(fmt);
    delete fmt;
    
    fmt = NumberFormat::createCurrencyInstance(status);
    failure(status, "NumberFormat::createCurrencyInstance");
    test(fmt);
    delete fmt;
    
    fmt = NumberFormat::createPercentInstance(status);
    failure(status, "NumberFormat::createPercentInstance");
    test(fmt);
    delete fmt;


    int32_t locCount = 0;
    const Locale *loc = NumberFormat::getAvailableLocales(locCount);
    if(quick) {
        if(locCount > 5)
            locCount = 5;
        logln("Quick mode: only testing first 5 Locales");
    }
    for(int i = 0; i < locCount; ++i) {
        UnicodeString name;
        logln(loc[i].getDisplayName(name));

        fmt = NumberFormat::createInstance(loc[i], status);
        failure(status, "NumberFormat::createInstance");
        test(fmt);
        delete fmt;
    
        fmt = NumberFormat::createCurrencyInstance(loc[i], status);
        failure(status, "NumberFormat::createCurrencyInstance");
        test(fmt);
        delete fmt;
    
        fmt = NumberFormat::createPercentInstance(loc[i], status);
        failure(status, "NumberFormat::createPercentInstance");
        test(fmt);
        delete fmt;
    }

    logln(UnicodeString("Numeric error ") + min_numeric_error + " to " + max_numeric_error);
}


void 
NumberFormatRoundTripTest::test(NumberFormat *fmt)
{
    if (TRUE)
    {
#if IEEE_754
        test(fmt, uprv_getNaN());
        test(fmt, uprv_getInfinity());
        test(fmt, -uprv_getInfinity());
#endif

        test(fmt, (int32_t)500);
        test(fmt, (int32_t)0);
        test(fmt, (int32_t)-0);
        test(fmt, 0.0);
        double negZero = 0.0; negZero /= -1.0;
        test(fmt, negZero);
        test(fmt, 9223372036854775808.0);
        test(fmt, -9223372036854775809.0);

        for(int i = 0; i < 10; ++i) {
            test(fmt, randomDouble(1));
            test(fmt, randomDouble(10000));
            test(fmt, uprv_floor((randomDouble(10000))));
            test(fmt, randomDouble(1e50));
            test(fmt, randomDouble(1e-50));
#ifndef OS390
            test(fmt, randomDouble(1e100));
#elif IEEE_754
            test(fmt, randomDouble(1e75));    /*OS390*/
#endif
            // {sfb} When formatting with a percent instance, numbers very close to
            // DBL_MAX will fail the round trip.  This is because:
            // 1) Format the double into a string --> INF% (since 100 * double > DBL_MAX)
            // 2) Parse the string into a double --> INF
            // 3) Re-format the double --> INF%
            // 4) The strings are equal, so that works.
            // 5) Calculate the proportional error --> INF, so the test will fail
            // I'll get around this by dividing by the multiplier to make sure
            // the double will stay in range.
            //if(fmt->getMultipler() == 1)
            if(fmt->getDynamicClassID() == DecimalFormat::getStaticClassID())
#ifndef OS390
                test(fmt, randomDouble(1e308) / ((DecimalFormat*)fmt)->getMultiplier());
#else
#   if IEEE_754
                test(fmt, randomDouble(1e75) / ((DecimalFormat*)fmt)->getMultiplier());   
#   else
                test(fmt, randomDouble(1e65) / ((DecimalFormat*)fmt)->getMultiplier());   /*OS390*/
#   endif
#endif

#ifdef XP_MAC
// PowerPC doesn't support denormalized doubles, so the low-end range
// doesn't match NT
            test(fmt, randomDouble(1e-290));
#elif defined(OS390)
#   if IEEE_754
            test(fmt, randomDouble(1e-78));  /*OS390*/
#   endif
#else
            test(fmt, randomDouble(1e-323));
#endif
#ifndef OS390
            test(fmt, randomDouble(1e-100));
#elif IEEE_754
            test(fmt, randomDouble(1e-78));  /*OS390*/
#endif
        }
    }
}

/**
 * Return a random value from -range..+range.
 */
double 
NumberFormatRoundTripTest::randomDouble(double range)
{
    double a = randFraction();
    return (2.0 * range * a) - range;
}

void 
NumberFormatRoundTripTest::test(NumberFormat *fmt, double value)
{
    test(fmt, Formattable(value));
}

void 
NumberFormatRoundTripTest::test(NumberFormat *fmt, int32_t value)
{
    test(fmt, Formattable(value));
}

void 
NumberFormatRoundTripTest::test(NumberFormat *fmt, const Formattable& value)
{
    fmt->setMaximumFractionDigits(999);
    
    UErrorCode status = U_ZERO_ERROR;
    UnicodeString s, s2, temp;
    if(isDouble(value))
        s = fmt->format(value.getDouble(), s);
    else
        s = fmt->format(value.getLong(), s);

    Formattable n;
    UBool show = verbose;
    if(DEBUG)
        logln(UnicodeString("  ") + /*value.getString(temp) +*/ " F> " + escape(s));

    fmt->parse(s, n, status);
    failure(status, "fmt->parse");
    if(DEBUG) 
        logln("  " + escape(s) + " P> " /*+ n.getString(temp)*/);

    if(isDouble(n))
        s2 = fmt->format(n.getDouble(), s2);
    else
        s2 = fmt->format(n.getLong(), s2);
    
    if(DEBUG) 
        logln(UnicodeString("  ") + /*n.getString(temp) +*/ " F> " + escape(s2));

    if(STRING_COMPARE) {
        if (s != s2) {
            errln(" *** STRING ERROR");
            show = TRUE;
        }
    }

    if(EXACT_NUMERIC_COMPARE) {
        if(value != n) {
            errln(" *** NUMERIC ERROR");
            show = TRUE;
        }
    }
    else {
        // Compute proportional error
        double error = proportionalError(value, n);

        if(error > MAX_ERROR) {
            errln(UnicodeString(" *** NUMERIC ERROR ") + error);
            show = TRUE;
        }

        if (error > max_numeric_error) 
            max_numeric_error = error;
        if (error < min_numeric_error) 
            min_numeric_error = error;
    }

    if(show)
        logln(/*value.getString(temp) +*/ typeOf(value, temp) + " F> " +
            escape(s) + " P> " +
            /*n.getString(temp) +*/ typeOf(n, temp) + " F> " +
            escape(s2));
}

double 
NumberFormatRoundTripTest::proportionalError(const Formattable& a, const Formattable& b)
{
    double aa,bb;
    
    if(isDouble(a))
        aa = a.getDouble();
    else
        aa = a.getLong();

    if(isDouble(b))
        bb = b.getDouble();
    else
        bb = b.getLong();

    double error = aa - bb;
    if(aa != 0 && bb != 0) 
        error /= aa;
    
    return uprv_fabs(error);
}

UnicodeString& 
NumberFormatRoundTripTest::typeOf(const Formattable& n, UnicodeString& result)
{
    if(n.getType() == Formattable::kLong) {
        result = UnicodeString(" Long");
    }
    else if(n.getType() == Formattable::kDouble) {
        result = UnicodeString(" Double");
    }
    else if(n.getType() == Formattable::kString) {
        result = UnicodeString(" UnicodeString");
        UnicodeString temp;
    }

    return result;
}


UnicodeString& 
NumberFormatRoundTripTest::escape(UnicodeString& s)
{
    UnicodeString copy(s);
    s.remove();
    for(int i = 0; i < copy.length(); ++i) {
        UChar c = copy[i];
        if(c < 0x00FF) 
            s += c;
        else {
            s += "+U";
            char temp[16];
            sprintf(temp, "%4X", c);        // might not work
            s += temp;
        }
    }
    return s;
}