#include <lexbor/html/parser.h>
#include <lexbor/dom/interfaces/element.h>
#include <lexbor/dom/interfaces/node.h>
#include <fstream>
#include <map>
#include "common.h"
#include "clients/remote_client.h"
#include "clients/myrient.h"
#include "lang.h"
#include "util.h"
#include "system.h"
#include "windows.h"

using httplib::Client;
using httplib::Headers;
using httplib::Result;

static std::map<std::string, int> month_map = {{"Jan", 1}, {"Feb", 2}, {"Mar", 3}, {"Apr", 4}, {"May", 5}, {"Jun", 6}, {"Jul", 7}, {"Aug", 8}, {"Sep", 9}, {"Oct", 10}, {"Nov", 11}, {"Dec", 12}};

std::vector<DirEntry> MyrientClient::ListDir(const std::string &path)
{
    std::vector<DirEntry> out;
    DirEntry entry;
    Util::SetupPreviousFolder(path, &entry);
    out.push_back(entry);

    std::string encoded_path = httplib::detail::encode_url(GetFullPath(path) + "/");
    if (auto res = client->Get(encoded_path))
    {
        lxb_status_t status;
        lxb_dom_attr_t *attr;
        lxb_dom_element_t *table_element, *tr_element, *td_element;
        lxb_html_document_t *document;
        lxb_dom_collection_t *table_collection;
        lxb_dom_collection_t *tr_collection;
        lxb_dom_collection_t *td_collection;
        std::string tmp_string;
        const lxb_char_t *value;
        size_t value_len;

        document = lxb_html_document_create();
        status = lxb_html_document_parse(document, (lxb_char_t *)res->body.c_str(), res->body.length());
        if (status != LXB_STATUS_OK)
        {
            lxb_html_document_destroy(document);
            goto finish;
        }

        table_collection = lxb_dom_collection_make(&document->dom_document, 1);
        if (table_collection == NULL)
        {
            lxb_html_document_destroy(document);
            goto finish;
        }

        tr_collection = lxb_dom_collection_make(&document->dom_document, 128);
        if (tr_collection == NULL)
        {
            lxb_html_document_destroy(document);
            goto finish;
        }

        status = lxb_dom_elements_by_tag_name(lxb_dom_interface_element(document->body),
                                              table_collection, (const lxb_char_t *)"table", 5);
        if (status != LXB_STATUS_OK)
        {
            lxb_dom_collection_destroy(tr_collection, true);
            lxb_dom_collection_destroy(table_collection, true);
            lxb_html_document_destroy(document);
            goto finish;
        }

        if (lxb_dom_collection_length(table_collection) < 1)
        {
            lxb_dom_collection_destroy(tr_collection, true);
            lxb_dom_collection_destroy(table_collection, true);
            lxb_html_document_destroy(document);
            goto finish;
        }

        for (size_t i = 0; i < lxb_dom_collection_length(table_collection); i++)
        {
            table_element = lxb_dom_collection_element(table_collection, i);
            value = lxb_dom_element_id(table_element, &value_len);
            tmp_string = std::string((const char *)value, value_len);
            if (tmp_string.compare("list") == 0)
                break;
            table_element = nullptr;
        }

        if (table_element == nullptr)
        {
            lxb_dom_collection_destroy(tr_collection, true);
            lxb_dom_collection_destroy(table_collection, true);
            lxb_html_document_destroy(document);
            goto finish;
        }

        status = lxb_dom_elements_by_tag_name(table_element,
                                              tr_collection, (const lxb_char_t *)"tr", 2);
        if (status != LXB_STATUS_OK && lxb_dom_collection_length(tr_collection) < 2)
        {
            lxb_dom_collection_destroy(tr_collection, true);
            lxb_dom_collection_destroy(table_collection, true);
            lxb_html_document_destroy(document);
            goto finish;
        }

        // skip row 0 , since it has the previous folder header
        for (size_t i = 2; i < lxb_dom_collection_length(tr_collection); i++)
        {
            DirEntry entry;
            std::string title, aclass;
            memset(&entry.modified, 0, sizeof(DateTime));

            tr_element = lxb_dom_collection_element(tr_collection, i);

            td_collection = lxb_dom_collection_make(&document->dom_document, 5);
            status = lxb_dom_elements_by_tag_name(tr_element,
                                                  td_collection, (const lxb_char_t *)"td", 2);
            if (status != LXB_STATUS_OK || lxb_dom_collection_length(td_collection) < 3)
            {
                lxb_dom_collection_destroy(td_collection, true);
                lxb_dom_collection_destroy(tr_collection, true);
                lxb_dom_collection_destroy(table_collection, true);
                lxb_html_document_destroy(document);
                goto finish;
            }

            // td0 contains the <a> tag
            td_element = lxb_dom_collection_element(td_collection, 0);
            lxb_dom_node_t *a_node = NextChildElement(td_element);
            value = lxb_dom_element_local_name(lxb_dom_interface_element(a_node), &value_len);
            tmp_string = std::string((const char *)value, value_len);
            if (tmp_string.compare("a") != 0)
            {
                lxb_dom_collection_destroy(td_collection, true);
                lxb_dom_collection_destroy(tr_collection, true);
                lxb_dom_collection_destroy(table_collection, true);
                lxb_html_document_destroy(document);
                goto finish;
            }
            value = lxb_dom_element_get_attribute(lxb_dom_interface_element(a_node), (const lxb_char_t *)"href", 4, &value_len);
            tmp_string = std::string((const char *)value, value_len);
            if (tmp_string[tmp_string.length()-1] == '/')
                tmp_string = tmp_string.substr(0, tmp_string.length()-1);
            tmp_string = BaseClient::UnEscape(tmp_string);
            sprintf(entry.name, "%s", tmp_string.c_str());
            sprintf(entry.directory, "%s", path.c_str());
            if (path.length() > 0 && path[path.length() - 1] == '/')
            {
                sprintf(entry.path, "%s%s", path.c_str(), entry.name);
            }
            else
            {
                sprintf(entry.path, "%s/%s", path.c_str(), entry.name);
            }

            // next td contains file size, if fize size is "-", then it's a directory
            td_element = lxb_dom_collection_element(td_collection, 1);
            value = lxb_dom_node_text_content(NextChildTextNode(td_element), &value_len);
            tmp_string = std::string((const char *)value, value_len);

            if (tmp_string.compare("-") == 0)
            {
                entry.isDir = true;
                entry.selectable = true;
                entry.file_size = 0;
                sprintf(entry.display_size, "%s", lang_strings[STR_FOLDER]);
            }
            else
            {
                entry.isDir = false;
                entry.selectable = true;
                uint64_t multiplier = 1;
                std::vector<std::string> fsize_parts = Util::Split(tmp_string, " ");

                float fsize = std::stof(fsize_parts[0]);

                if (fsize_parts.size() > 1)
                {
                    switch (fsize_parts[1][0])
                    {
                        case 'K':
                            multiplier = 1024;
                            break;
                        case 'M':
                            multiplier = 1048576;
                            break;
                        case 'G':
                            multiplier = 1073741824;
                            break;
                        default:
                            multiplier = 1;
                    }
                }
                entry.file_size = fsize * multiplier;
                DirEntry::SetDisplaySize(&entry);
            }

            // next td contains the date
            td_element = lxb_dom_collection_element(td_collection, 2);
            value = lxb_dom_node_text_content(NextChildTextNode(td_element), &value_len);
            tmp_string = std::string((const char *)value, value_len);
            std::vector<std::string> date_time = Util::Split(tmp_string, " ");

            if (date_time.size() > 1)
            {
                std::vector<std::string> adate = Util::Split(date_time[0], "-");
                if (adate.size() == 3)
                {
                    entry.modified.day = atoi(adate[0].c_str());
                    entry.modified.month = month_map[adate[1]];
                    entry.modified.year = atoi(adate[2].c_str());
                }

                std::vector<std::string> atime = Util::Split(date_time[1], ":");
                if (atime.size() == 2)
                {
                    entry.modified.hours = atoi(atime[0].c_str());
                    entry.modified.minutes = atoi(atime[1].c_str());
                }
            }

            lxb_dom_collection_destroy(td_collection, true);
            if (strcmp(entry.name, "..") != 0 && strcmp(entry.name, ".") != 0)
            {
                out.push_back(entry);
            }
        }

        lxb_dom_collection_destroy(tr_collection, true);
        lxb_dom_collection_destroy(table_collection, true);
        lxb_html_document_destroy(document);
    }
    else
    {
        sprintf(this->response, "%s", httplib::to_string(res.error()).c_str());
        return out;
    }

finish:
    return out;
}