#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "conf.h"

int findConfId(ptConf confChain) {
    ptConf px = confChain;
    int max = 0;

    while (px -> next != NULL) {
        if (px -> id > max) {
            max = px -> id;
        }
		
		px = px -> next;
    }

    return max + 1;
}

ptConf newConfChain() {
    ptConf confChain = (ptConf) malloc(sizeof(tConf));

    confChain -> next = NULL;

    return confChain;
}

void addConf(ptConf confChain, int id, char title[], char speaker[], int day, int month, int year) {
    ptConf px = confChain;

    while (px -> next != NULL) {
        px = px -> next;
    }

    px -> id = id;
    px -> day = day;
    px -> month = month;
    px -> year = year;
    strcpy(px -> title, title);
    strcpy(px -> speaker, speaker);
    px -> listeners = (ptListenerList) malloc(sizeof(tListenerList));
    px -> next = (ptConf) malloc(sizeof(tConf));
    px -> next -> next = NULL;
}

void removeConf(ptConf confChain, int id) {
    ptConf px = confChain;

    if (px -> next -> next == NULL) {
        free(px -> next);
        px -> next = NULL;
    } else if (px -> id == id) {
        px -> id = px -> next -> id;
        strcpy(px -> title, px -> next -> title);
        strcpy(px -> speaker, px -> next -> speaker);
        px -> day = px -> next -> day;
        px -> month = px -> next -> month;
        px -> year = px -> next -> year;

        ptConf tmp = px -> next;
        px -> next = px -> next -> next;
        free(tmp);
    } else {
        while (px -> next != NULL && px -> next -> id != id) {
            px = px -> next;
        }

        if (px -> next -> id == id) {
            ptConf tmp = px -> next;
            px -> next = px -> next -> next;
            free(tmp);
        }
    }
}

int findListenerId(ptListener listenerChain) {
    ptListener px = listenerChain;
    int max = 0;

    while (px -> next != NULL) {
        if (px -> id > max) {
            max = px -> id;
        }
		
		px = px -> next;
    }

    return max + 1;
}

ptListener newListenerChain() {
    ptListener listenerChain = (ptListener) malloc(sizeof(tListener));

    listenerChain -> prev = NULL;
    listenerChain -> next = NULL;

    return listenerChain;
}

void addListener(ptListener listenerChain, int id, char name[], int age, int level) {
    ptListener px = listenerChain;

    while (px -> next != NULL) {
        px = px -> next;
    }

    px -> id = id;
    strcpy(px -> name, name);
    px -> age = age;
    px -> level = level;
    px -> confs = (ptConfList) malloc(sizeof(tConfList));
    px -> next = (ptListener) malloc(sizeof(tListener));
    px -> next -> next = NULL;
    px -> next -> prev = px;
}

void removeListener(ptListener listenerChain, int id) {
    ptListener px = listenerChain;

    if (px -> next -> next == NULL) {
        free(px -> next);
        px -> next = NULL;
    } else if (px -> id == id) {
        px -> id = px -> next -> id;
        strcpy(px -> name, px -> next -> name);
        px -> age = px -> next -> age;
        px -> level = px -> next -> level;

        ptListener tmp = px -> next;
        px -> next = px -> next -> next;
        px -> next -> prev = px;
        free(tmp);
    } else {
        while (px -> next != NULL && px -> next -> id != id) {
            px = px -> next;
        }

        if (px -> next -> id == id) {
            ptListener tmp = px -> next;
            px -> next = px -> next -> next;
            px -> next -> prev = px;
            free(tmp);
        }
    }
}