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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2023 Mike Becker, Olaf Wintermann All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "cx/test.h"
#include "util_allocator.h"

#include "cx/printf.h"
#include "cx/buffer.h"

#define ASSERT_ZERO_TERMINATED(str) CX_TEST_ASSERTM((str).ptr[(str).length] == '\0', \
    #str " is not zero terminated")

static size_t test_printf_write_func(
        void const *src,
        size_t esize,
        size_t ecount,
        void *target
) {
    memcpy(target, src, esize * ecount);
    return esize * ecount;
}

CX_TEST(test_bprintf) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        CxBuffer buf;
        cxBufferInit(&buf, NULL, 64, alloc, 0);
        size_t r = cx_bprintf(&buf, "This %s aged %u years in a %2XSK.", "Test", 10, 0xca);
        CX_TEST_ASSERT(r == 34);
        CX_TEST_ASSERT(buf.size == 34);
        buf.space[r] = '\0';
        CX_TEST_ASSERT(0 == strcmp(buf.space, "This Test aged 10 years in a CASK."));
        cxBufferDestroy(&buf);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_bprintf_large_string) {
    unsigned len = cx_printf_sbo_size;
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    char *aaa = malloc(len);
    char *bbb = malloc(len);
    char *expected = malloc(2*len+16);
    memset(aaa, 'a', len-1);
    aaa[len-1] = 0;
    memset(bbb, 'b', len-1);
    bbb[len-1] = 0;
    sprintf(expected, "After %s comes %s.", aaa, bbb);
    CX_TEST_DO {
        CxBuffer buf;
        cxBufferInit(&buf, NULL, 64, alloc, CX_BUFFER_AUTO_EXTEND);
        size_t r = cx_bprintf(&buf, "After %s comes %s.", aaa, bbb);
        size_t er = 2*len-2+14;
        CX_TEST_ASSERT(r == er);
        CX_TEST_ASSERT(buf.size == er);
        cxBufferPut(&buf, 0);
        CX_TEST_ASSERT(0 == strcmp(expected, buf.space));
        cxBufferDestroy(&buf);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    free(aaa);
    free(bbb);
    free(expected);
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_bprintf_nocap) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    char space[20];
    memset(space, 'a', 20);
    CX_TEST_DO {
        CxBuffer buf;
        cxBufferInit(&buf, space, 16, alloc, 0);
        size_t r = cx_bprintf(&buf, "Hello %s with more than %d chars.", "string", 16);
        CX_TEST_ASSERT(r == 16);
        CX_TEST_ASSERT(buf.size == 16);
        CX_TEST_ASSERT(0 == memcmp(space, "Hello string witaaaa", 20));
        cxBufferDestroy(&buf);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_fprintf) {
    char const *h = "Hello";
    char buf[32];
    size_t r;
    CX_TEST_DO {
        r = cx_fprintf(buf, test_printf_write_func, "teststring");
        CX_TEST_ASSERT(r == 10);
        CX_TEST_ASSERT(0 == memcmp(buf, "teststring", r));

        r = cx_fprintf(buf, test_printf_write_func, "[%10s]", h);
        CX_TEST_ASSERT(r == 12);
        CX_TEST_ASSERT(0 == memcmp(buf, "[     Hello]", r));

        r = cx_fprintf(buf, test_printf_write_func, "[%-10s]", h);
        CX_TEST_ASSERT(r == 12);
        CX_TEST_ASSERT(0 == memcmp(buf, "[Hello     ]", r));

        r = cx_fprintf(buf, test_printf_write_func, "[%*s]", 10, h);
        CX_TEST_ASSERT(r == 12);
        CX_TEST_ASSERT(0 == memcmp(buf, "[     Hello]", r));

        r = cx_fprintf(buf, test_printf_write_func, "[%-10.*s]", 4, h);
        CX_TEST_ASSERT(r == 12);
        CX_TEST_ASSERT(0 == memcmp(buf, "[Hell      ]", r));

        r = cx_fprintf(buf, test_printf_write_func, "[%-*.*s]", 10, 4, h);
        CX_TEST_ASSERT(r == 12);
        CX_TEST_ASSERT(0 == memcmp(buf, "[Hell      ]", r));

        r = cx_fprintf(buf, test_printf_write_func, "%c", 'A');
        CX_TEST_ASSERT(r == 1);
        CX_TEST_ASSERT(0 == memcmp(buf, "A", r));

        r = cx_fprintf(buf, test_printf_write_func, "%i %d %.6i %i %.0i %+i %i", 1, 2, 3, 0, 0, 4, -4);
        CX_TEST_ASSERT(r == 19);
        CX_TEST_ASSERT(0 == memcmp(buf, "1 2 000003 0  +4 -4", r));

        r = cx_fprintf(buf, test_printf_write_func, "%x %x %X %#x", 5, 10, 10, 6);
        CX_TEST_ASSERT(r == 9);
        CX_TEST_ASSERT(0 == memcmp(buf, "5 a A 0x6", r));

        r = cx_fprintf(buf, test_printf_write_func, "%o %#o %#o", 10, 10, 4);
        CX_TEST_ASSERT(r == 9);
        CX_TEST_ASSERT(0 == memcmp(buf, "12 012 04", r));

        r = cx_fprintf(buf, test_printf_write_func, "%05.2f %.2f %5.2f", 1.5, 1.5, 1.5);
        CX_TEST_ASSERT(r == 16);
        CX_TEST_ASSERT(0 == memcmp(buf, "01.50 1.50  1.50", r));

        r = cx_fprintf(buf, test_printf_write_func, "'%*c'", 5, 'x');
        CX_TEST_ASSERT(r == 7);
        CX_TEST_ASSERT(0 == memcmp(buf, "'    x'", r));

        r = cx_fprintf(buf, test_printf_write_func, "'%*c'", -5, 'x');
        CX_TEST_ASSERT(r == 7);
        CX_TEST_ASSERT(0 == memcmp(buf, "'x    '", r));
    }
}

CX_TEST(test_asprintf) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;

    char const *h = "Hello";

    int const specimen_count = 13;
    cxmutstr r[specimen_count];
    int specimen = 0;

    CX_TEST_DO {
        r[specimen] = cx_asprintf_a(alloc, "teststring");
        CX_TEST_ASSERT(r[specimen].length == 10);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "teststring"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "[%10s]", h);
        CX_TEST_ASSERT(r[specimen].length == 12);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "[     Hello]"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "[%-10s]", h);
        CX_TEST_ASSERT(r[specimen].length == 12);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "[Hello     ]"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "[%*s]", 10, h);
        CX_TEST_ASSERT(r[specimen].length == 12);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "[     Hello]"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "[%-10.*s]", 4, h);
        CX_TEST_ASSERT(r[specimen].length == 12);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "[Hell      ]"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "[%-*.*s]", 10, 4, h);
        CX_TEST_ASSERT(r[specimen].length == 12);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "[Hell      ]"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "%c", 'A');
        CX_TEST_ASSERT(r[specimen].length == 1);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "A"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "%i %d %.6i %i %.0i %+i %i", 1, 2, 3, 0, 0, 4, -4);
        CX_TEST_ASSERT(r[specimen].length == 19);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "1 2 000003 0  +4 -4"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "%x %x %X %#x", 5, 10, 10, 6);
        CX_TEST_ASSERT(r[specimen].length == 9);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "5 a A 0x6"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "%o %#o %#o", 10, 10, 4);
        CX_TEST_ASSERT(r[specimen].length == 9);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "12 012 04"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "%05.2f %.2f %5.2f", 1.5, 1.5, 1.5);
        CX_TEST_ASSERT(r[specimen].length == 16);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "01.50 1.50  1.50"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "'%*c'", 5, 'x');
        CX_TEST_ASSERT(r[specimen].length == 7);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "'    x'"));
        specimen++;

        r[specimen] = cx_asprintf_a(alloc, "'%*c'", -5, 'x');
        CX_TEST_ASSERT(r[specimen].length == 7);
        ASSERT_ZERO_TERMINATED(r[specimen]);
        CX_TEST_ASSERT(0 == strcmp(r[specimen].ptr, "'x    '"));
        specimen++;

        CX_TEST_ASSERT(specimen == specimen_count); // self-test

        for (int i = 0; i < specimen_count; i++) {
            cx_strfree_a(alloc, &r[i]);
        }
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_asprintf_large_string) {
    unsigned len = cx_printf_sbo_size;
    char *aaa = malloc(len);
    char *bbb = malloc(len);
    char *expected = malloc(2*len+16);
    memset(aaa, 'a', len-1);
    aaa[len-1] = 0;
    memset(bbb, 'b', len-1);
    bbb[len-1] = 0;
    sprintf(expected, "After %s comes %s.", aaa, bbb);
    CX_TEST_DO {
        cxmutstr r = cx_asprintf("After %s comes %s.", aaa, bbb);
        CX_TEST_ASSERT(r.length == 2*len-2+14);
        ASSERT_ZERO_TERMINATED(r);
        CX_TEST_ASSERT(0 == strcmp(r.ptr, expected));
        cx_strfree(&r);
    }
    free(aaa);
    free(bbb);
    free(expected);
}

CX_TEST(test_sprintf_no_realloc) {
    char *buf = malloc(16);
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        char *oldbuf = buf;
        size_t buflen = 16;
        size_t len = cx_sprintf_a(alloc, &buf, &buflen, "Test %d %s", 47, "string");
        CX_TEST_ASSERT(oldbuf == buf);
        CX_TEST_ASSERT(len == 14);
        CX_TEST_ASSERT(buflen == 16);
        CX_TEST_ASSERT(0 == memcmp(buf, "Test 47 string", 15));
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
    free(buf);
}

CX_TEST(test_sprintf_realloc) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    char *buf = cxMalloc(alloc, 8);
    CX_TEST_DO {
        size_t buflen = 8;
        size_t len = cx_sprintf_a(alloc, &buf, &buflen, "Test %d %s", 47, "foobar");
        CX_TEST_ASSERT(len == 14);
        CX_TEST_ASSERT(buflen == 15);
        CX_TEST_ASSERT(0 == memcmp(buf, "Test 47 foobar", 15));
        cxFree(alloc, buf);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_sprintf_realloc_to_fit_terminator) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    // make it so that only the zero-terminator does not fit
    char *buf = cxMalloc(alloc, 14);
    CX_TEST_DO {
        size_t buflen = 14;
        size_t len = cx_sprintf_a(alloc, &buf, &buflen, "Test %d %s", 13, "string");
        CX_TEST_ASSERT(len == 14);
        CX_TEST_ASSERT(buflen == 15);
        CX_TEST_ASSERT(0 == memcmp(buf, "Test 13 string", 15));
        cxFree(alloc, buf);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_sprintf_s_no_alloc) {
    char buf[16];
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        char *str;
        size_t buflen = 16;
        size_t len = cx_sprintf_sa(alloc, buf, &buflen, &str, "Test %d %s", 47, "string");
        CX_TEST_ASSERT(str == buf);
        CX_TEST_ASSERT(buflen == 16);
        CX_TEST_ASSERT(len == 14);
        CX_TEST_ASSERT(0 == memcmp(buf, "Test 47 string", 15));
        CX_TEST_ASSERT(0 == memcmp(str, "Test 47 string", 15));
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_sprintf_s_alloc) {
    char buf[16];
    memcpy(buf, "0123456789abcdef", 16);
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        char *str;
        size_t buflen = 16;
        size_t len = cx_sprintf_sa(alloc, buf, &buflen, &str, "Hello %d %s", 4711, "larger string");
        CX_TEST_ASSERT(str != buf);
        CX_TEST_ASSERT(buflen == 25);
        CX_TEST_ASSERT(len == 24);
        CX_TEST_ASSERT(0 == memcmp(str, "Hello 4711 larger string", 25));
        cxFree(alloc, str);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_sprintf_s_alloc_to_fit_terminator) {
    char buf[16];
    memcpy(buf, "0123456789abcdef", 16);
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        char *str;
        size_t buflen = 16;
        size_t len = cx_sprintf_sa(alloc, buf,&buflen, &str, "Hello %d %s", 112, "string");
        CX_TEST_ASSERT(str != buf);
        CX_TEST_ASSERT(len == 16);
        CX_TEST_ASSERT(buflen == 17);
        CX_TEST_ASSERT(0 == memcmp(str, "Hello 112 string", 17)); // include terminator
        cxFree(alloc, str);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CxTestSuite *cx_test_suite_printf(void) {
    CxTestSuite *suite = cx_test_suite_new("printf");

    cx_test_register(suite, test_bprintf);
    cx_test_register(suite, test_bprintf_large_string);
    cx_test_register(suite, test_bprintf_nocap);
    cx_test_register(suite, test_fprintf);
    cx_test_register(suite, test_asprintf);
    cx_test_register(suite, test_asprintf_large_string);
    cx_test_register(suite, test_sprintf_no_realloc);
    cx_test_register(suite, test_sprintf_realloc);
    cx_test_register(suite, test_sprintf_realloc_to_fit_terminator);
    cx_test_register(suite, test_sprintf_s_no_alloc);
    cx_test_register(suite, test_sprintf_s_alloc);
    cx_test_register(suite, test_sprintf_s_alloc_to_fit_terminator);

    return suite;
}