#include <ncurses.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "editor.h"

void help() {
    printf("Usage:\n");
    printf("    cmd open <path/to/file> // opens the specified file\n");
    printf("    cmd rm <path/to/file> // deletes the specified file\n");
    printf("    cmd new <path/to/file> // creates a new empty file at the specified path\n");
    printf("    cmd mv <path/to/file> <new/path> // moves the specified file to the new path\n");
    printf("    cmd cp <path/to/file> <new/path> // copies the specified file to the new path\n");
    printf("    cmd len <path/to/file> // returns the length of the specified file\n");
    printf("    cmd log // prints a list of all changes made to the file\n");
}

int open_editor(char* filename) {
    initscr();
    raw();
    noecho();
    keypad(stdscr, true);
    int max_y, max_x;
    getmaxyx(stdscr, max_y, max_x);

    move(0, 5);

    Editor editor;
    if (strcmp(filename, "") == 0) {
        editor = new_editor();    
    } else {
        editor = editor_from(str_from_file(fopen(filename, "r")));
    }
    while (true) {
        refresh();
        int c = getch();
        if (editor.editmode == true) {
            switch (c) {
                case 27:
                    switch_mode(&editor);
                    break;
                case KEY_BACKSPACE:
                    move_cursor(&editor, -1, 0);
                    delchar(&editor);
                    break;
                case KEY_DC:
                    delchar(&editor);
                    break;
                case '\n':
                    pressed_enter(&editor);
                    break;
                case KEY_UP:
                    move_cursor(&editor, 0, -1);
                    break;
                case KEY_DOWN:
                    move_cursor(&editor, 0, 1);
                    break;
                case KEY_LEFT:
                    move_cursor(&editor, -1, 0);
                    break;
                case KEY_RIGHT:
                    move_cursor(&editor, 1, 0);
                    break;
                default:
                    fprintf(stderr, "%d\n", c);
                    addchar(&editor, c);
                    break;
            }
        } else {
            switch (c) {
                case 'q':
                    endwin();
                    return 0;
                case 'i':
                    switch_mode(&editor);
                    break;
                case 'w':
                    // TODO: write function to save the data to a file
                    break;
                default:
                    break;
            }
        }
    }
}

int main(int argc, char* argv[]) {
    if (argc == 1) {
        Editor e = new_editor();
        open_editor("");
    } else if (argc == 3) {
        if (strcmp(argv[1], "open") == 0) {
            fprintf(stderr, "starting editor openiing file %s", argv[2]);
            open_editor(argv[2]);     
        }    
    }
    return 0;
}