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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2020 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 "xml.h"

#include <stdio.h>
#include <stdlib.h>

#include <libxml/tree.h>

#include "testutils.h"

#include "../public/webdav.h"
#include "../util/writer.h"

#include "../webdav/webdav.h"
#include "../webdav/xml.h"

typedef struct Test1Data {
    int beginCounter;
    int endCounter;
    int elmCounter;
    int endElmCounter;
    int textErr;
    int err;
    int endErr;
    int nodesWithAttributesCounter;
    xmlNode *prev;
} Test1Data;

static int test1_begin(xmlNode *node, void *userdata) {
    Test1Data *data = userdata;
    data->beginCounter++;
    
    if(node->type == XML_ELEMENT_NODE) {
        data->elmCounter++;
        const char *name = (const char*)node->name;
        
        if(!strcmp(name, "ignore") || !strcmp(name, "ignore")) {
            data->err = 1;
            return 1;
        }
        
        switch(data->elmCounter) {
            case 1: if(strcmp(name, "test")){ data->err = 1; return 1; } break;
            case 2: if(strcmp(name, "elm1")) { data->err = 1; return 1; } break;
            case 3: if(strcmp(name, "elm2")) { data->err = 1; return 1; } break;
            case 4: if(strcmp(name, "c")) { data->err = 1; return 1; } break;
            case 5: if(strcmp(name, "a")) { data->err = 1; return 1; } break;
            case 6: if(strcmp(name, "d")) { data->err = 1; return 1; } break;
            case 7: if(strcmp(name, "e")) { data->err = 1; return 1; } break;
            case 8: if(strcmp(name, "b")) { data->err = 1; return 1; } break;
            case 9: if(strcmp(name, "x")) { data->err = 1; return 1; } break;
            case 10: if(strcmp(name, "z")) { data->err = 1; return 1; } break;
            case 11: if(strcmp(name, "nextelm")) { data->err = 1; return 1; } break;
        }
    } else if(node->type == XML_TEXT_NODE) {
        const char *text = (const char*)node->content;
        if(!strcmp(text, "teststr")) {
            if(strcmp((const char*)data->prev->name, "elm1")) {
                data->textErr = 1;
                return 1;
            }
        } else if(!strcmp(text, "hello") || !strcmp(text, "world")) {
            if(strcmp((const char*)data->prev->name, "a")) {
                data->textErr = 1;
                return 1;
            }
        }
    }
    
    if(node->type == XML_ELEMENT_NODE) {
        data->prev = node;
    }
    return 0;
}

static int test1_end(xmlNode *node, void *userdata) {
    Test1Data *data = userdata;
    data->endCounter++;
    
    if(node->type == XML_ELEMENT_NODE) {
        data->endElmCounter++;
        const char *name = (const char*)node->name;
        
        if(!strcmp(name, "ignore") || !strcmp(name, "ignore")) {
            data->err = 1;
            return 1;
        }
        
        switch(data->endElmCounter) {
            case 1: if(strcmp(name, "elm1")){ data->endErr = 1; return 1; } break;
            case 2: if(strcmp(name, "elm2")){ data->endErr = 1; return 1; } break;
            case 3: if(strcmp(name, "a")){ data->endErr = 1; return 1; } break;
            case 4: if(strcmp(name, "b")){ data->endErr = 1; return 1; } break;
            case 5: if(strcmp(name, "e")){ data->endErr = 1; return 1; } break;
            case 6: if(strcmp(name, "d")){ data->endErr = 1; return 1; } break;
            case 7: if(strcmp(name, "c")){ data->endErr = 1; return 1; } break;
            case 8: if(strcmp(name, "z")){ data->endErr = 1; return 1; } break;
            case 9: if(strcmp(name, "x")){ data->endErr = 1; return 1; } break;
            case 10: if(strcmp(name, "test")){ data->endErr = 1; return 1; } break;
            case 11: if(strcmp(name, "nextelm")) { data->endErr = 1; return 1; } break;
        }
    }
    
    return 0;
}

static int test2_begin(xmlNode *node, void *userdata) {
    Test1Data *data = userdata;
    data->beginCounter++;
    if(node->type == XML_ELEMENT_NODE) {
        data->elmCounter++;
        if(node->properties) {
            data->nodesWithAttributesCounter++;
        }
    }
    return 0;
}

static int test2_end(xmlNode *node, void *userdata) {
    Test1Data *data = userdata;
    data->endCounter++;
    if(node->type == XML_ELEMENT_NODE) {
        data->endElmCounter++;
    }
    return 0;
}

CX_TEST(test_wsxml_iterator) {
    Session *sn = testutil_session();
    
    CX_TEST_DO {
    
        xmlDoc *doc = xmlReadMemory(
                XML_TESTDATA1, strlen(XML_TESTDATA1), NULL, NULL, 0);
        xmlDoc *doc2 = xmlReadMemory(
                XML_TESTDATA2, strlen(XML_TESTDATA2), NULL, NULL, 0);
        xmlDoc *doc6 = xmlReadMemory(
                XML_TESTDATA6, strlen(XML_TESTDATA6), NULL, NULL, 0);
        CX_TEST_ASSERT(doc);
        CX_TEST_ASSERT(doc2);
        CX_TEST_ASSERT(doc6);

        xmlNode *root = xmlDocGetRootElement(doc);

        // Test 1: iterate over complete document
        Test1Data testdata;
        ZERO(&testdata, sizeof(Test1Data));
        int ret = wsxml_iterator(sn->pool, root, test1_begin, test1_end, &testdata);
        CX_TEST_ASSERT(ret == 0);
        CX_TEST_ASSERT(!testdata.err);
        CX_TEST_ASSERT(!testdata.endErr);
        CX_TEST_ASSERT(!testdata.textErr);
        CX_TEST_ASSERT(testdata.beginCounter == testdata.endCounter);

        // Test 2: iterate over sub-document
        ZERO(&testdata, sizeof(Test1Data));
        xmlNode *root2 = xmlDocGetRootElement(doc2);
        xmlNode *sub = root2->children->children;
        ret = wsxml_iterator(sn->pool, sub, test1_begin, test1_end, &testdata);
        CX_TEST_ASSERT(ret == 0);
        CX_TEST_ASSERT(!testdata.err);
        CX_TEST_ASSERT(!testdata.endErr);
        CX_TEST_ASSERT(!testdata.textErr);
        CX_TEST_ASSERT(testdata.beginCounter == testdata.endCounter);

        // Test 3: iterate over document with all kinds of node types
        xmlNode *root6 = xmlDocGetRootElement(doc6);
        ZERO(&testdata, sizeof(Test1Data));
        ret = wsxml_iterator(sn->pool, root6, test2_begin, test2_end, &testdata);
        CX_TEST_ASSERT(ret == 0);
        CX_TEST_ASSERT(testdata.elmCounter == testdata.endElmCounter);
        CX_TEST_ASSERT(testdata.elmCounter == 12);
        CX_TEST_ASSERT(testdata.nodesWithAttributesCounter == 5);

        xmlFreeDoc(doc);
        xmlFreeDoc(doc2);
        xmlFreeDoc(doc6);
    }
    
    testutil_destroy_session(sn);
}

// checks if the namespace list contains the test namespaces x1, x2, x3 and x4
static void check_ns_list(WebdavNSList *list, int *x1, int *x2, int *x3, int *x4) {
    *x1 = 0;
    *x2 = 0;
    *x3 = 0;
    *x4 = 0;
    
    WebdavNSList *elm = list;
    while(elm) {
        if(!strcmp((const char*)elm->namespace->prefix, "x1") &&
           !strcmp((const char*)elm->namespace->href, "http://example.com/ns1/"))
        {
            *x1 = 1;
        } else if(!strcmp((const char*)elm->namespace->prefix, "x2") &&
                  !strcmp((const char*)elm->namespace->href, "http://example.com/ns2/"))
        {
            *x2 = 1;
        } else if(!strcmp((const char*)elm->namespace->prefix, "x3") &&
                  !strcmp((const char*)elm->namespace->href, "http://example.com/ns_0/"))
        {
            *x3 = 1;
        } else if(!strcmp((const char*)elm->namespace->prefix, "x4") &&
                  !strcmp((const char*)elm->namespace->href, "http://example.com/ns_0/"))
        {
            *x4 = 1;
        }
            
        elm = elm->next;
    }
}

CX_TEST(test_wsxml_get_required_namespaces) {
    Session *sn = testutil_session();
    
    CX_TEST_DO {
    
        xmlDoc *doc3 = xmlReadMemory(
                XML_TESTDATA3, strlen(XML_TESTDATA3), NULL, NULL, 0);
        xmlDoc *doc4 = xmlReadMemory(
                XML_TESTDATA4, strlen(XML_TESTDATA4), NULL, NULL, 0);
        xmlDoc *doc5 = xmlReadMemory(
                XML_TESTDATA5, strlen(XML_TESTDATA5), NULL, NULL, 0);

        xmlNode *node0 = xmlDocGetRootElement(doc3);
        xmlNode *node1 = xmlDocGetRootElement(doc3)->children;
        xmlNode *node2 = xmlDocGetRootElement(doc4)->children;
        xmlNode *node3 = xmlDocGetRootElement(doc5)->children;

        CX_TEST_ASSERT(doc3);
        CX_TEST_ASSERT(doc4);
        CX_TEST_ASSERT(doc5);

        int err0, err1, err2, err3;
        int x1 = 0;
        int x2 = 0;
        int x3 = 0;
        int x4 = 0;
        WebdavNSList *elm = NULL;

        // Test 0: 
        WebdavNSList *ns0 = wsxml_get_required_namespaces(sn->pool, node0, &err0);
        CX_TEST_ASSERT(!err0);
        CX_TEST_ASSERT(!ns0);

        WebdavNSList *ns1 = wsxml_get_required_namespaces(sn->pool, node1, &err1);
        check_ns_list(ns1, &x1, &x2, &x3, &x4);
        CX_TEST_ASSERT(!err1);
        CX_TEST_ASSERT(ns1);
        CX_TEST_ASSERT(x1);
        CX_TEST_ASSERT(x2);
        CX_TEST_ASSERT(x3);
        CX_TEST_ASSERT(x4);

        WebdavNSList *ns2 = wsxml_get_required_namespaces(sn->pool, node2, &err2);
        check_ns_list(ns2, &x1, &x2, &x3, &x4);
        CX_TEST_ASSERT(!err2);
        CX_TEST_ASSERT(ns2);
        CX_TEST_ASSERT(x1);
        CX_TEST_ASSERT(x2);
        CX_TEST_ASSERT(!x3);
        CX_TEST_ASSERT(!x4);

        WebdavNSList *ns3 = wsxml_get_required_namespaces(sn->pool, node3, &err3);
        check_ns_list(ns3, &x1, &x2, &x3, &x4);
        CX_TEST_ASSERT(!err3);
        CX_TEST_ASSERT(ns3);
        CX_TEST_ASSERT(x1);
        CX_TEST_ASSERT(x2);
        CX_TEST_ASSERT(!x3);
        CX_TEST_ASSERT(!x4);

        xmlFreeDoc(doc3);
        xmlFreeDoc(doc4);
        xmlFreeDoc(doc5);
    }
    
    testutil_destroy_session(sn);
}

CX_TEST(test_wsxml_write_nodes) {
    Session *sn = testutil_session();
    TestIOStream *st = testutil_iostream(2048, TRUE);
    
    CX_TEST_DO {
        xmlDoc *doc = xmlReadMemory(
                XML_TESTDATA6, strlen(XML_TESTDATA6), NULL, NULL, 0);
        CX_TEST_ASSERT(doc);
        xmlNode *root = xmlDocGetRootElement(doc);

        Writer writer;
        char buffer[1024];
        writer_init(&writer, st, buffer, 1024);

        int err = wsxml_write_nodes(sn->pool, &writer, NULL, root);
        writer_flush(&writer);
        CX_TEST_ASSERT(err == 0);
        CX_TEST_ASSERT(st->buf->pos > 0);

        //printf("\n\n");
        //printf("%.*s\n", (int)st->buf->size, st->buf->space);
        //printf("\n\n");

        xmlDoc *genDoc = xmlReadMemory(
                st->buf->space, st->buf->size, NULL, NULL, 0);
        CX_TEST_ASSERT(genDoc);

        xmlFreeDoc(doc);
        xmlFreeDoc(genDoc);
    
    }
    testutil_iostream_destroy(st);
    testutil_destroy_session(sn);
}

CX_TEST(test_wsxml_nslist2string) {
    Session *sn = testutil_session();
    
    CX_TEST_DO {
    
        WSNamespace ns1;
        WSNamespace ns2;
        WSNamespace ns3;  
        memset(&ns1, 0, sizeof(WSNamespace));
        memset(&ns2, 0, sizeof(WSNamespace));
        memset(&ns3, 0, sizeof(WSNamespace));
        ns1.prefix = (const xmlChar*)"x";
        ns1.href = (const xmlChar*)"ns1";
        ns2.prefix = (const xmlChar*)"y";
        ns2.href = (const xmlChar*)"ns2";
        ns3.prefix = (const xmlChar*)"z";
        ns3.href = (const xmlChar*)"ns3";

        WebdavNSList elm1 = { &ns1, NULL, NULL };
        WebdavNSList elm2 = { &ns2, NULL, NULL };
        WebdavNSList elm3 = { &ns3, NULL, NULL };

        // single elm test
        char *str1 = wsxml_nslist2string(sn->pool, &elm1);
        CX_TEST_ASSERT(str1);
        CX_TEST_ASSERT(!strcmp(str1, "x:ns1"));

        // 2 elm test
        elm1.next = &elm2;
        char *str2 = wsxml_nslist2string(sn->pool, &elm1);
        CX_TEST_ASSERT(str2);
        CX_TEST_ASSERT(!strcmp(str2, "x:ns1\ny:ns2"));

        // 3 elm test
        elm2.next = &elm3;
        char *str3 = wsxml_nslist2string(sn->pool, &elm1);
        CX_TEST_ASSERT(str3);
        CX_TEST_ASSERT(!strcmp(str3, "x:ns1\ny:ns2\nz:ns3"));

        // empty prefix test
        ns1.prefix = NULL;
        char *str4 = wsxml_nslist2string(sn->pool, &elm1);
        CX_TEST_ASSERT(str4);
        CX_TEST_ASSERT(!strcmp(str4, ":ns1\ny:ns2\nz:ns3"));
    
    }
    testutil_destroy_session(sn);
}

CX_TEST(test_wsxml_string2nslist) {
    Session *sn = testutil_session();
    
    CX_TEST_DO {
    
        // empty list
        WebdavNSList *list1 = wsxml_string2nslist(sn->pool, "");
        CX_TEST_ASSERT(!list1);

        // 1 elm list
        WebdavNSList *list2 = wsxml_string2nslist(sn->pool, "x:ns1");
        CX_TEST_ASSERT(list2);
        CX_TEST_ASSERT(list2->namespace);
        CX_TEST_ASSERT(!strcmp((const char*)list2->namespace->prefix, "x"));
        CX_TEST_ASSERT(!strcmp((const char*)list2->namespace->href, "ns1"));

        // 2 elm list
        WebdavNSList *list3 = wsxml_string2nslist(sn->pool, "x:ns1\ny:ns2");
        CX_TEST_ASSERT(list3);
        CX_TEST_ASSERT(list3->namespace);
        CX_TEST_ASSERT(!strcmp((const char*)list3->namespace->prefix, "x"));
        CX_TEST_ASSERT(!strcmp((const char*)list3->namespace->href, "ns1"));
        CX_TEST_ASSERT(list3->next);
        CX_TEST_ASSERT(list3->next->namespace);
        CX_TEST_ASSERT(!strcmp((const char*)list3->namespace->prefix, "x"));
        CX_TEST_ASSERT(!strcmp((const char*)list3->namespace->href, "ns1"));

        // empty prefix
        WebdavNSList *list4 = wsxml_string2nslist(sn->pool, ":x\ny:ns2");
        CX_TEST_ASSERT(list4);
        CX_TEST_ASSERT(list4->namespace);
        CX_TEST_ASSERT(!list4->namespace->prefix);
        CX_TEST_ASSERT(!strcmp((const char*)list3->namespace->href, "ns1"));
    
    
    }
    testutil_destroy_session(sn);
}