#include "dynstr.h"
#include <stdint.h>

/**
 * maintains the state of a text editor, including the text buffer,
 * cursor position, and various editor settings.
 */
typedef struct {
    uint32_t lines;
    uint32_t capacity;
    uint32_t buffer_line;
    uint32_t buffer_col;
    uint32_t y_offset;
    uint32_t x_offset;
    bool unsaved_changes;
    bool editmode;
    String_t* buffer;
    String_t* original;
    String_t filename;
} Editor;

/**
 * Creates a new editor instance from a filename
 * 
 * @param filename The name of the file to open
 * @return Editor A new editor instance initialized with the file's content
 */
Editor new_editor(String_t filename);

/**
 * Creates a new editor instance from an input string
 * 
 * @param input_string initial editor content
 * @param filename name of the file being edited
 * @return an instance of the editor
 */
Editor editor_from(String_t input_string, String_t filename);

/**
 * Moves the cursor in the editor (relative to it's current position)
 * 
 * @param self Pointer to the editor instance
 * @param x Horizontal movement (negative for left, positive for right)
 * @param y Vertical movement (negative for up, positive for down)
 */
void move_cursor(Editor* self, int x, int y);

/**
 * Deletes the character before the cursor
 * 
 * @param self Pointer to the editor instance
 */
void delchar(Editor* self);

/**
 * Adds a character at the cursor position
 * 
 * @param self Pointer to the editor instance
 * @param c The character to add
 */
void addchar(Editor* self, char c);

/**
 * Handles the enter key press, creating a new line
 * 
 * @param self Pointer to the editor instance
 */
void pressed_enter(Editor* self);

/**
 * Toggles between edit and command mode
 * 
 * @param self Pointer to the editor instance
 */
void switch_mode(Editor* self);

/**
 * Cleans up and frees resources used by the editor
 * 
 * @param self Pointer to the editor instance
 */
void shutdown_editor(Editor* self);

/**
 * Saves the current buffer content to the file
 * 
 * @param self Pointer to the editor instance
 * @return int Returns 0 on success, non-zero on failure
 */
int save_file(Editor* self);

/**
 * Converts the editor's buffer content to a String_t type
 * 
 * @param self Pointer to the editor instance
 * @return String_t* Pointer to a string containing the buffer content
 */
String_t* to_string(Editor* self);