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


typedef struct person
{
    char* name;
    char* age;
}Person;


static void throwException(char* excp_info)
{
    printf("Exception: %s\n", excp_info);
    exit(0);
}

/*
 * Visiualized the graph by DOT. First gen a dot file, after obtain
 * the png, delet the dot file.
 * @qcliu 2015/02/09
 */
void visiualize(Graph* graph)
{
    //filename = graph->name.dot
    char* filename = (char*)malloc(strlen(graph->name) + 5);
    strcpy(filename, graph->name);
    strcat(filename, ".dot");
    FILE* fp = fopen(filename, "a");
    if (fp == NULL)
        throwException("fopen error!");

    fprintf(fp, "digraph G\n{\n");

    LNode* lnode = GETLINK(graph->vnode)->next;
    while (lnode != NULL)
    {
        VNode* current_vnode = lnode->data;
        Person* person = current_vnode->data;
        LNode* current_edge = GETLINK(current_vnode->edge)->next;
        while(current_edge != NULL)
        {
            Edge* current_edge0 = current_edge->data;
            VNode* to_vnode = current_edge0->to;
            Person* to_person = to_vnode->data;
            fprintf(fp, "%s->%s;\n", person->name, to_person->name);

            current_edge = current_edge->next;
        }
        lnode = lnode->next;
    }

    fprintf(fp, "}\n");

    fclose(fp);

    //"dot -Tpng filename -o graph->name.png"
    char* command = (char*)malloc(strlen(filename) + strlen(graph->name) + 20);
    strcat(command, "dot -Tsvg ");
    strcat(command, filename);
    strcat(command, " -o ");
    strcat(command, graph->name);
    strcat(command, ".svg");
    system(command);

    //"rm -rf filename"
    command = (char*)malloc(strlen(filename) + 12);
    strcat(command, "rm -rf ");
    strcat(command, filename);
    system(command);

}


void main()
{
    printf("hello, world\n");
    Graph* graph = initGraph("myGraph");
    graph->visiualize = visiualize;

    Person* person1 = (Person*)malloc(sizeof(Person));
    person1->name = "huan1";
    person1->age = "1";

    Person* person2 = (Person*)malloc(sizeof(Person));
    person2->name = "huan2";
    person2->age = "2";

    Person* person3 = (Person*)malloc(sizeof(Person));
    person3->name = "huan3";
    person3->age = "3";

    Person* person4 = (Person*)malloc(sizeof(Person));
    person4->name = "huan4";
    person4->age = "4";

    Person* person5 = (Person*)malloc(sizeof(Person));
    person5->name = "huan5";
    person5->age = "5";

    Person* person6 = (Person*)malloc(sizeof(Person));
    person6->name = "huan6";
    person6->age = "6";


 
    addVNode(graph, person1);
    addVNode(graph, person2);
    addVNode(graph, person3);
    addVNode(graph, person4);
    addVNode(graph, person5);
    addVNode(graph, person6);


    addEdge(graph, person1, person2);
    addEdge(graph, person1, person3);
    addEdge(graph, person2, person4);
    addEdge(graph, person3, person4);
    addEdge(graph, person4, person5);
    addEdge(graph, person5, person6);
    addEdge(graph, person6, person2);
    addEdge(graph, person2, person2);
    addEdge(graph, person2, person2);

    

    graph->visiualize(graph);



}