// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
* Copyright (c) 2002-2016, International Business Machines
* Corporation and others.  All Rights Reserved.
**********************************************************************
*/
#include "unicode/uset.h"
#include "unicode/ustring.h"
#include "cintltst.h"
#include "cmemory.h"
#include <stdlib.h>
#include <string.h>

#define TEST(x) addTest(root, &x, "uset/" # x)

static void TestAPI(void);
static void Testj2269(void);
static void TestSerialized(void);
static void TestNonInvariantPattern(void);
static void TestBadPattern(void);
static void TestFreezable(void);
static void TestSpan(void);

void addUSetTest(TestNode** root);

static void expect(const USet* set,
                   const char* inList,
                   const char* outList,
                   UErrorCode* ec);
static void expectContainment(const USet* set,
                              const char* list,
                              UBool isIn);
static char oneUCharToChar(UChar32 c);
static void expectItems(const USet* set,
                        const char* items);

void
addUSetTest(TestNode** root) {
    TEST(TestAPI);
    TEST(Testj2269);
    TEST(TestSerialized);
    TEST(TestNonInvariantPattern);
    TEST(TestBadPattern);
    TEST(TestFreezable);
    TEST(TestSpan);
}

/*------------------------------------------------------------------
 * Tests
 *------------------------------------------------------------------*/

static void Testj2269() {
  UErrorCode status = U_ZERO_ERROR;
  UChar a[4] = { 0x61, 0x62, 0x63, 0 };
  USet *s = uset_open(1, 0);
  uset_addString(s, a, 3);
  a[0] = 0x63; a[1] = 0x63;
  expect(s, "{abc}", "{ccc}", &status);
  uset_close(s);
}

static const UChar PAT[] = {91,97,45,99,123,97,98,125,93,0}; /* "[a-c{ab}]" */
static const int32_t PAT_LEN = UPRV_LENGTHOF(PAT) - 1;

static const UChar PAT_lb[] = {0x6C, 0x62, 0}; /* "lb" */
static const int32_t PAT_lb_LEN = UPRV_LENGTHOF(PAT_lb) - 1;

static const UChar VAL_SP[] = {0x53, 0x50, 0}; /* "SP" */
static const int32_t VAL_SP_LEN = UPRV_LENGTHOF(VAL_SP) - 1;

static const UChar STR_bc[] = {98,99,0}; /* "bc" */
static const int32_t STR_bc_LEN = UPRV_LENGTHOF(STR_bc) - 1;

static const UChar STR_ab[] = {97,98,0}; /* "ab" */
static const int32_t STR_ab_LEN = UPRV_LENGTHOF(STR_ab) - 1;

/**
 * Basic API test for uset.x
 */
static void TestAPI() {
    USet* set;
    USet* set2;
    UErrorCode ec;
    
    /* [] */
    set = uset_openEmpty();
    expect(set, "", "abc{ab}", NULL);
    uset_close(set);

    set = uset_open(1, 0);
    expect(set, "", "abc{ab}", NULL);
    uset_close(set);

    set = uset_open(1, 1);
    uset_clear(set);
    expect(set, "", "abc{ab}", NULL);
    uset_close(set);

    /* [ABC] */
    set = uset_open(0x0041, 0x0043);
    expect(set, "ABC", "DEF{ab}", NULL);
    uset_close(set);

    /* [a-c{ab}] */
    ec = U_ZERO_ERROR;
    set = uset_openPattern(PAT, PAT_LEN, &ec);
    if(U_FAILURE(ec)) {
        log_err("uset_openPattern([a-c{ab}]) failed - %s\n", u_errorName(ec));
        return;
    }
    if(!uset_resemblesPattern(PAT, PAT_LEN, 0)) {
        log_err("uset_resemblesPattern of PAT failed\n");
    }
    expect(set, "abc{ab}", "def{bc}", &ec);

    /* [a-d{ab}] */
    uset_add(set, 0x64);
    expect(set, "abcd{ab}", "ef{bc}", NULL);

    /* [acd{ab}{bc}] */
    uset_remove(set, 0x62);
    uset_addString(set, STR_bc, STR_bc_LEN);
    expect(set, "acd{ab}{bc}", "bef{cd}", NULL);

    /* [acd{bc}] */
    uset_removeString(set, STR_ab, STR_ab_LEN);
    expect(set, "acd{bc}", "bfg{ab}", NULL);

    /* [^acd{bc}] */
    uset_complement(set);
    expect(set, "bef{bc}", "acd{ac}", NULL);

    /* [a-e{bc}] */
    uset_complement(set);
    uset_addRange(set, 0x0062, 0x0065);
    expect(set, "abcde{bc}", "fg{ab}", NULL);

    /* [de{bc}] */
    uset_removeRange(set, 0x0050, 0x0063);
    expect(set, "de{bc}", "bcfg{ab}", NULL);

    /* [g-l] */
    uset_set(set, 0x0067, 0x006C);
    expect(set, "ghijkl", "de{bc}", NULL);

    if (uset_indexOf(set, 0x0067) != 0) {
        log_err("uset_indexOf failed finding correct index of 'g'\n");
    }

    if (uset_charAt(set, 0) != 0x0067) {
        log_err("uset_charAt failed finding correct char 'g' at index 0\n");
    }

    /* How to test this one...? */
    uset_compact(set);

    /* [g-i] */
    uset_retain(set, 0x0067, 0x0069);
    expect(set, "ghi", "dejkl{bc}", NULL);

    /* UCHAR_ASCII_HEX_DIGIT */
    uset_applyIntPropertyValue(set, UCHAR_ASCII_HEX_DIGIT, 1, &ec);
    if(U_FAILURE(ec)) {
        log_err("uset_applyIntPropertyValue([UCHAR_ASCII_HEX_DIGIT]) failed - %s\n", u_errorName(ec));
        return;
    }
    expect(set, "0123456789ABCDEFabcdef", "GHIjkl{bc}", NULL);

    /* [ab] */
    uset_clear(set);
    uset_addAllCodePoints(set, STR_ab, STR_ab_LEN);
    expect(set, "ab", "def{ab}", NULL);
    if (uset_containsAllCodePoints(set, STR_bc, STR_bc_LEN)){
        log_err("set should not conatin all characters of \"bc\" \n");
    }

    /* [] */
    set2 = uset_open(1, 1);
    uset_clear(set2);

    /* space */
    uset_applyPropertyAlias(set2, PAT_lb, PAT_lb_LEN, VAL_SP, VAL_SP_LEN, &ec);
    expect(set2, " ", "abcdefghi{bc}", NULL);

    /* [a-c] */
    uset_set(set2, 0x0061, 0x0063);
    /* [g-i] */
    uset_set(set, 0x0067, 0x0069);

    /* [a-c g-i] */
    if (uset_containsSome(set, set2)) {
        log_err("set should not contain some of set2 yet\n");
    }
    uset_complementAll(set, set2);
    if (!uset_containsSome(set, set2)) {
        log_err("set should contain some of set2\n");
    }
    expect(set, "abcghi", "def{bc}", NULL);

    /* [g-i] */
    uset_removeAll(set, set2);
    expect(set, "ghi", "abcdef{bc}", NULL);

    /* [a-c g-i] */
    uset_addAll(set2, set);
    expect(set2, "abcghi", "def{bc}", NULL);

    /* [g-i] */
    uset_retainAll(set2, set);
    expect(set2, "ghi", "abcdef{bc}", NULL);

    // ICU 69 added some missing functions for parity with C++ and Java.
    uset_applyPattern(set, u"[abcdef{ch}{sch}]", -1, 0, &ec);
    if(U_FAILURE(ec)) {
        log_err("uset_openPattern([abcdef{ch}{sch}]) failed - %s\n", u_errorName(ec));
        return;
    }
    expect(set, "abcdef{ch}{sch}", "", NULL);

    uset_removeAllCodePoints(set, u"ce", 2);
    expect(set, "abdf{ch}{sch}", "ce", NULL);

    uset_complementRange(set, u'b', u'f');
    expect(set, "ace{ch}{sch}", "bdf", NULL);

    uset_complementString(set, u"ch", -1);
    expect(set, "ace{sch}", "bdf{ch}", NULL);

    uset_complementString(set, u"xy", -1);
    expect(set, "ace{sch}{xy}", "bdf{ch}", NULL);

    uset_complementAllCodePoints(set, u"abef", 4);
    expect(set, "bcf{sch}{xy}", "ade{ch}", NULL);

    uset_retainAllCodePoints(set, u"abef", -1);
    expect(set, "bf", "acde{ch}{sch}{xy}", NULL);

    uset_applyPattern(set, u"[abcdef{ch}{sch}]", -1, 0, &ec);
    if(U_FAILURE(ec)) {
        log_err("uset_openPattern([abcdef{ch}{sch}]) failed - %s\n", u_errorName(ec));
        return;
    }
    expect(set, "abcdef{ch}{sch}", "", NULL);

    uset_retainString(set, u"sch", 3);
    expect(set, "{sch}", "abcdef{ch}", NULL);

    uset_retainString(set, u"ch", 3);
    expect(set, "", "abcdef{ch}{sch}", NULL);

    uset_close(set);
    uset_close(set2);
}

/*------------------------------------------------------------------
 * Support
 *------------------------------------------------------------------*/

/**
 * Verifies that the given set contains the characters and strings in
 * inList, and does not contain those in outList.  Also verifies that
 * 'set' is not NULL and that 'ec' succeeds.
 * @param set the set to test, or NULL (on error)
 * @param inList list of set contents, in iteration order.  Format is
 * list of individual strings, in iteration order, followed by sorted
 * list of strings, delimited by {}.  This means we do not test
 * characters '{' or '}' and we do not test strings containing those
 * characters either.
 * @param outList list of things not in the set.  Same format as
 * inList.
 * @param ec an error code, checked for success.  May be NULL in which
 * case it is ignored.
 */
static void expect(const USet* set,
                   const char* inList,
                   const char* outList,
                   UErrorCode* ec) {
    if (ec!=NULL && U_FAILURE(*ec)) {
        log_err("FAIL: %s\n", u_errorName(*ec));
        return;
    }
    if (set == NULL) {
        log_err("FAIL: USet is NULL\n");
        return;
    }
    expectContainment(set, inList, TRUE);
    expectContainment(set, outList, FALSE);
    expectItems(set, inList);
}

static void expectContainment(const USet* set,
                              const char* list,
                              UBool isIn) {
    const char* p = list;
    UChar ustr[4096];
    char *pat;
    UErrorCode ec;
    int32_t rangeStart = -1, rangeEnd = -1, length;
            
    ec = U_ZERO_ERROR;
    length = uset_toPattern(set, ustr, sizeof(ustr), TRUE, &ec);
    if(U_FAILURE(ec)) {
        log_err("FAIL: uset_toPattern() fails in expectContainment() - %s\n", u_errorName(ec));
        return;
    }
    pat=aescstrdup(ustr, length);

    while (*p) {
        if (*p=='{') {
            const char* stringStart = ++p;
            int32_t stringLength = 0;
            char strCopy[64];

            while (*p++ != '}') {
            }
            stringLength = (int32_t)(p - stringStart - 1);
            strncpy(strCopy, stringStart, stringLength);
            strCopy[stringLength] = 0;

            u_charsToUChars(stringStart, ustr, stringLength);
            
            if (uset_containsString(set, ustr, stringLength) == isIn) {
                log_verbose("Ok: %s %s \"%s\"\n", pat,
                            (isIn ? "contains" : "does not contain"),
                            strCopy);
            } else {
                log_data_err("FAIL: %s %s \"%s\" (Are you missing data?)\n", pat,
                        (isIn ? "does not contain" : "contains"),
                        strCopy);
            }
        }

        else {
            UChar32 c;

            u_charsToUChars(p, ustr, 1);
            c = ustr[0];

            if (uset_contains(set, c) == isIn) {
                log_verbose("Ok: %s %s '%c'\n", pat,
                            (isIn ? "contains" : "does not contain"),
                            *p);
            } else {
                log_data_err("FAIL: %s %s '%c' (Are you missing data?)\n", pat,
                        (isIn ? "does not contain" : "contains"),
                        *p);
            }

            /* Test the range API too by looking for ranges */
            if (c == rangeEnd+1) {
                rangeEnd = c;
            } else {
                if (rangeStart >= 0) {
                    if (uset_containsRange(set, rangeStart, rangeEnd) == isIn) {
                        log_verbose("Ok: %s %s U+%04X-U+%04X\n", pat,
                                    (isIn ? "contains" : "does not contain"),
                                    rangeStart, rangeEnd);
                    } else {
                        log_data_err("FAIL: %s %s U+%04X-U+%04X (Are you missing data?)\n", pat,
                                (isIn ? "does not contain" : "contains"),
                                rangeStart, rangeEnd);
                    }
                }
                rangeStart = rangeEnd = c;
            }

            ++p;
        }
    }

    if (rangeStart >= 0) {
        if (uset_containsRange(set, rangeStart, rangeEnd) == isIn) {
            log_verbose("Ok: %s %s U+%04X-U+%04X\n", pat,
                        (isIn ? "contains" : "does not contain"),
                        rangeStart, rangeEnd);
        } else {
            log_data_err("FAIL: %s %s U+%04X-U+%04X (Are you missing data?)\n", pat,
                    (isIn ? "does not contain" : "contains"),
                    rangeStart, rangeEnd);
        }
    }
}

/* This only works for invariant BMP chars */
static char oneUCharToChar(UChar32 c) {
    UChar ubuf[1];
    char buf[1];
    ubuf[0] = (UChar) c;
    u_UCharsToChars(ubuf, buf, 1);
    return buf[0];
}

static void expectItems(const USet* set,
                        const char* items) {
    const char* p = items;
    UChar ustr[4096], itemStr[4096];
    char buf[4096];
    char *pat;
    UErrorCode ec;
    int32_t expectedSize = 0;
    int32_t itemCount = uset_getItemCount(set);
    int32_t itemIndex = 0;
    UChar32 start = 1, end = 0;
    int32_t itemLen = 0, length;

    ec = U_ZERO_ERROR;
    length = uset_toPattern(set, ustr, sizeof(ustr), TRUE, &ec);
    if (U_FAILURE(ec)) {
        log_err("FAIL: uset_toPattern => %s\n", u_errorName(ec));
        return;
    }
    pat=aescstrdup(ustr, length);

    if (uset_isEmpty(set) != (strlen(items)==0)) {
        log_data_err("FAIL: %s should return %s from isEmpty (Are you missing data?)\n",
                pat,
                strlen(items)==0 ? "TRUE" : "FALSE");
    }

    /* Don't test patterns starting with "[^" */
    if (u_strlen(ustr) > 2 && ustr[1] == 0x5e /*'^'*/) {
        return;
    }

    while (*p) {

        ++expectedSize;

        if (start > end || start == -1) {
            /* Fetch our next item */
            if (itemIndex >= itemCount) {
                log_data_err("FAIL: ran out of items iterating %s (Are you missing data?)\n", pat);
                return;
            }

            itemLen = uset_getItem(set, itemIndex, &start, &end,
                                   itemStr, sizeof(itemStr), &ec);
            if (U_FAILURE(ec) || itemLen < 0) {
                log_err("FAIL: uset_getItem => %s\n", u_errorName(ec));
                return;
            }

            if (itemLen == 0) {
                log_verbose("Ok: %s item %d is %c-%c\n", pat,
                            itemIndex, oneUCharToChar(start),
                            oneUCharToChar(end));
            } else {
                itemStr[itemLen] = 0;
                u_UCharsToChars(itemStr, buf, itemLen+1);
                log_verbose("Ok: %s item %d is \"%s\"\n", pat, itemIndex, buf);
            }

            ++itemIndex;
        }

        if (*p=='{') {
            const char* stringStart = ++p;
            int32_t stringLength = 0;
            char strCopy[64];

            while (*p++ != '}') {
            }
            stringLength = (int32_t)(p - stringStart - 1);
            strncpy(strCopy, stringStart, stringLength);
            strCopy[stringLength] = 0;

            u_charsToUChars(stringStart, ustr, stringLength);
            ustr[stringLength] = 0;
            
            if (itemLen == 0) {
                log_err("FAIL: for %s expect \"%s\" next, but got a char\n",
                        pat, strCopy);
                return;
            }

            if (u_strcmp(ustr, itemStr) != 0) {
                log_err("FAIL: for %s expect \"%s\" next\n",
                        pat, strCopy);
                return;
            }
        }

        else {
            UChar32 c;

            u_charsToUChars(p, ustr, 1);
            c = ustr[0];

            if (itemLen != 0) {
                log_err("FAIL: for %s expect '%c' next, but got a string\n",
                        pat, *p);
                return;
            }

            if (c != start++) {
                log_err("FAIL: for %s expect '%c' next\n",
                        pat, *p);
                return;
            }

            ++p;
        }
    }

    if (uset_size(set) == expectedSize) {
        log_verbose("Ok: %s size is %d\n", pat, expectedSize);
    } else {
        log_err("FAIL: %s size is %d, expected %d\n",
                pat, uset_size(set), expectedSize);
    }
}

static void
TestSerialized() {
    uint16_t buffer[1000];
    USerializedSet sset;
    USet *set;
    UErrorCode errorCode;
    UChar32 c;
    int32_t length;

    /* use a pattern that generates both BMP and supplementary code points */
    U_STRING_DECL(pattern, "[:Cf:]", 6);
    U_STRING_INIT(pattern, "[:Cf:]", 6);

    errorCode=U_ZERO_ERROR;
    set=uset_openPattern(pattern, -1, &errorCode);
    if(U_FAILURE(errorCode)) {
        log_data_err("uset_openPattern([:Cf:]) failed - %s (Are you missing data?)\n", u_errorName(errorCode));
        return;
    }

    length=uset_serialize(set, buffer, UPRV_LENGTHOF(buffer), &errorCode);
    if(U_FAILURE(errorCode)) {
        log_err("unable to uset_serialize([:Cf:]) - %s\n", u_errorName(errorCode));
        uset_close(set);
        return;
    }

    uset_getSerializedSet(&sset, buffer, length);
    for(c=0; c<=0x10ffff; ++c) {
        if(uset_contains(set, c)!=uset_serializedContains(&sset, c)) {
            log_err("uset_contains(U+%04x)!=uset_serializedContains(U+%04x)\n", c);
            break;
        }
    }

    uset_close(set);
}

/**
 * Make sure that when non-invariant chars are passed to uset_openPattern
 * they do not cause an ugly failure mode (e.g. assertion failure).
 * JB#3795.
 */
static void
TestNonInvariantPattern() {
    UErrorCode ec = U_ZERO_ERROR;
    /* The critical part of this test is that the following pattern
       must contain a non-invariant character. */
    static const char *pattern = "[:ccc!=0:]";
    UChar buf[256];
    int32_t len = u_unescape(pattern, buf, 256);
    /* This test 'fails' by having an assertion failure within the
       following call.  It passes by running to completion with no
       assertion failure. */
    USet *set = uset_openPattern(buf, len, &ec);
    uset_close(set);
}

static void TestBadPattern(void) {
    UErrorCode status = U_ZERO_ERROR;
    USet *pat;
    U_STRING_DECL(pattern, "[", 1);
    U_STRING_INIT(pattern, "[", 1);
    pat = uset_openPatternOptions(pattern, u_strlen(pattern), 0, &status);
    if (pat != NULL || U_SUCCESS(status)) {
        log_err("uset_openPatternOptions did not fail as expected %s\n", u_errorName(status));
    }
}

static USet *openIDSet() {
    UErrorCode errorCode = U_ZERO_ERROR;
    U_STRING_DECL(pattern, "[:ID_Continue:]", 15);
    U_STRING_INIT(pattern, "[:ID_Continue:]", 15);
    return uset_openPattern(pattern, 15, &errorCode);
}

static void TestFreezable() {
    USet *idSet;
    USet *frozen;
    USet *thawed;

    idSet=openIDSet();

    if (idSet == NULL) {
        log_data_err("openIDSet() returned NULL. (Are you missing data?)\n");
        uset_close(idSet);
        return;
    }

    frozen=uset_clone(idSet);

    if (frozen == NULL) {
        log_err("uset_Clone() returned NULL\n");
        return;
    }

    if(!uset_equals(frozen, idSet)) {
        log_err("uset_clone() did not make an equal copy\n");
    }

    uset_freeze(frozen);
    uset_addRange(frozen, 0xd802, 0xd805);

    if(uset_isFrozen(idSet) || !uset_isFrozen(frozen) || !uset_equals(frozen, idSet)) {
        log_err("uset_freeze() or uset_isFrozen() does not work\n");
    }

    thawed=uset_cloneAsThawed(frozen);

    if (thawed == NULL) {
        log_err("uset_cloneAsThawed(frozen) returned NULL");
        uset_close(frozen);
        uset_close(idSet);
        return;
    }

    uset_addRange(thawed, 0xd802, 0xd805);

    if(uset_isFrozen(thawed) || uset_equals(thawed, idSet) || !uset_containsRange(thawed, 0xd802, 0xd805)) {
        log_err("uset_cloneAsThawed() does not work\n");
    }

    uset_close(idSet);
    uset_close(frozen);
    uset_close(thawed);
}

static void TestSpan() {
    static const UChar s16[2]={ 0xe01, 0x3000 };
    static const char* s8="\xE0\xB8\x81\xE3\x80\x80";

    USet *idSet=openIDSet();

    if (idSet == NULL) {
        log_data_err("openIDSet() returned NULL (Are you missing data?)\n");
        return;
    }

    if(
        1!=uset_span(idSet, s16, 2, USET_SPAN_CONTAINED) ||
        0!=uset_span(idSet, s16, 2, USET_SPAN_NOT_CONTAINED) ||
        2!=uset_spanBack(idSet, s16, 2, USET_SPAN_CONTAINED) ||
        1!=uset_spanBack(idSet, s16, 2, USET_SPAN_NOT_CONTAINED)
    ) {
        log_err("uset_span() or uset_spanBack() does not work\n");
    }

    if(
        3!=uset_spanUTF8(idSet, s8, 6, USET_SPAN_CONTAINED) ||
        0!=uset_spanUTF8(idSet, s8, 6, USET_SPAN_NOT_CONTAINED) ||
        6!=uset_spanBackUTF8(idSet, s8, 6, USET_SPAN_CONTAINED) ||
        3!=uset_spanBackUTF8(idSet, s8, 6, USET_SPAN_NOT_CONTAINED)
    ) {
        log_err("uset_spanUTF8() or uset_spanBackUTF8() does not work\n");
    }

    uset_freeze(idSet);

    if(
        1!=uset_span(idSet, s16, 2, USET_SPAN_CONTAINED) ||
        0!=uset_span(idSet, s16, 2, USET_SPAN_NOT_CONTAINED) ||
        2!=uset_spanBack(idSet, s16, 2, USET_SPAN_CONTAINED) ||
        1!=uset_spanBack(idSet, s16, 2, USET_SPAN_NOT_CONTAINED)
    ) {
        log_err("uset_span(frozen) or uset_spanBack(frozen) does not work\n");
    }

    if(
        3!=uset_spanUTF8(idSet, s8, 6, USET_SPAN_CONTAINED) ||
        0!=uset_spanUTF8(idSet, s8, 6, USET_SPAN_NOT_CONTAINED) ||
        6!=uset_spanBackUTF8(idSet, s8, 6, USET_SPAN_CONTAINED) ||
        3!=uset_spanBackUTF8(idSet, s8, 6, USET_SPAN_NOT_CONTAINED)
    ) {
        log_err("uset_spanUTF8(frozen) or uset_spanBackUTF8(frozen) does not work\n");
    }

    uset_close(idSet);
}

/*eof*/