#include <string>
#include <sstream>
#include <iostream>
#include <vector>
#include <time.h>

#include "readlog.h"

bool parse_logline(struct logline *parsed, std::string raw) {
    // Format: 1970-01-01T00:00:00 < Foobar> Hello world!
    // 1970-01-01T00:00:00 -!- will be skipped

    std::string timestring;
    struct tm time = {0};
    std::istringstream buffer(raw);
    
    buffer >> time.tm_year;
    buffer.ignore(1);
    buffer >> time.tm_mon;
    buffer.ignore(1);
    buffer >> time.tm_mday;
    buffer.ignore(1);
    buffer >> time.tm_hour;
    buffer.ignore(1);
    buffer >> time.tm_min;
    buffer.ignore(1);
    buffer >> time.tm_sec;
    buffer.ignore(1);

    time.tm_year -= 1900;
    time.tm_mon -= 1;

    parsed->timestamp = mktime(&time);

    if (buffer.get() == '<') {
        switch(buffer.get()) {
            case '+':
                parsed->status = voice;
                break;
    
            case '@':
                parsed->status = op;
                break;
    
            default:
                parsed->status = normal;
        }
        std::getline(buffer, parsed->nick, '>');
    } else if (buffer.get() == '*') { // extra space before * is taken out by first if condition
        parsed->status = normal;

        buffer.ignore(1); // ' '
        std::getline(buffer, parsed->nick, ' ');
    } else {
        return false;
    }
    
    buffer.ignore(1); // ' '
    
    std::getline(buffer, parsed->message);

    return true;
}

void readlog(std::vector<struct logline> &lines, std::istream &infile) {
    std::string rawline;
    struct logline parsedline;

    while (infile.good()) {
        std::getline(infile, rawline);
        if (parse_logline(&parsedline, rawline))
            lines.push_back(parsedline);
    }
}