#include "post.h"
#include <memory>
#include <sstream>
#include <string>
#include <ctime>
#include <maddy/parser.h>

void replaceAll(std::string& str, const std::string& from, const std::string& to) {
    size_t start_pos = 0;
    while ((start_pos = str.find(from, start_pos)) != std::string::npos) {
        str.replace(start_pos, from.length(), to);
        start_pos += to.length();
    }
}

Post::Post(std::string contentin, const std::string& user) : user(user), time(std::time(nullptr)) {
    replaceAll(contentin, "&", "&amp;");
    replaceAll(contentin, "<", "&lt;");
    replaceAll(contentin, ">", "&gt;");
    replaceAll(contentin, "\"", "&quot;");
    replaceAll(contentin, "'", "&apos;");
    // parse the post content markdown
    std::stringstream input(contentin);
    std::shared_ptr<maddy::Parser> parser = std::make_shared<maddy::Parser>();
    content = parser->Parse(input);
}
 
Post::Post(std::string contentin, uint64_t user) : userId(user), time(std::time(nullptr)) {
    replaceAll(contentin, "&", "&amp;");
    replaceAll(contentin, "<", "&lt;");
    replaceAll(contentin, ">", "&gt;");
    replaceAll(contentin, "\"", "&quot;");
    replaceAll(contentin, "'", "&apos;");
    // parse the post content markdown
    std::stringstream input(contentin);
    std::shared_ptr<maddy::Parser> parser = std::make_shared<maddy::Parser>();
    content = parser->Parse(input);
}

std::string Post::genHtml() const {
    std::stringstream ss;
    ss << "<hr>\n";

    // do time
    char buf[256];
    struct tm ts;
    ts = *localtime(&time);
    strftime(buf, sizeof(buf), "%a %Y-%m-%d %H:%M:%S %Z", &ts);

    ss << "<p class='postinfo'><i>" << user << "</i> posted this at " << buf << "</p>\n";

    ss << content;

    ss << "<p class='postinfo'>" << likes << " likes</p>";
    ss << "<div class='post-buttons'>";
    ss << "<button onclick='like(\"" << id << "\")' id='likebutton" << id << "'>Like</button>";
    ss << "<button onclick='window.location.href = \"/posts/" << id << "\"'>Open</button>";
    ss << "</div>";

    return ss.str();

}