#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "later.h"


LaterItem_t* new_item() {
    LaterItem_t* item = (LaterItem_t*)malloc(sizeof(LaterItem_t));
    item->directory = NULL;
    item->path = NULL;
    item->command = NULL;
    return item;
}

void free_item(LaterItem_t* item) {
    if (item->directory) free(item->directory);
    if (item->path) free(item->path);
    if (item->command) free(item->command);
    free(item);
}

void build_item(LaterItem_t* item, char** raw_command, int raw_command_length) {
    // get the current directory
    char directory[255];
    getcwd(directory, sizeof(directory)-1);
    item->directory = strdup(directory);

    // get the current path
    char* path = getenv("PATH");
    item->path = path;

    // copy the command
    char* command = (char*)malloc(2048);
    int command_idx = 0;
    char* cur;
    for (int raw_idx = 0; raw_idx < raw_command_length; raw_idx++) {
        cur = raw_command[raw_idx];
        command_idx += strlen(cur);
        strcat(command, cur);
        command[command_idx] = ' ';
        command_idx++;
    }
    item->command = command;
}

void print_item(LaterItem_t* item) {
    /*
     * Format:
     * DIR <pwd>
     * PATH <path>
     * DO <command>
     * --
     */
    printf("DIR %s\nPATH %s\nDO %s\n--\n", item->directory, item->path, item->command);
}


int main(int argc, char** argv) {
    /* how it could work
     *  - read in tokens
     *  - wait for --
     *  - after --, read everything in and save to the LATERFILE
     *  - make sure to also save the PWD
     */
    char* laterfile_path = getenv("LATERFILE");
    if (!laterfile_path || strlen(laterfile_path) == 0) {
        printf("where's your LATERFILE?\n");
        return 1;
    }

    // open the file for reading/appending
    FILE* laterfile = fopen(laterfile_path, "a+");
    fseek(laterfile, 0, SEEK_END);

    // loop through the arguments
    int argi = 1;
    while (argi < argc && strncmp(argv[argi], "--", 2) != 0)
        argi++;

    if (argi == argc) {
        printf("unrecognized arguments\n");
        return 1;
    }

    argi++;  // go past the --
    
    LaterItem_t* item = new_item();
    build_item(item, argv+argi, argc-argi);
    print_item(item);

    return 0;
}