#ifndef ECEX_TYPES_H
#define ECEX_TYPES_H

#include <stddef.h>

typedef struct ecex ecex_t;
typedef struct buffer buffer_t;
typedef struct ecex_window ecex_window_t;
typedef struct ecex_draw_context ecex_draw_context_t;

typedef int (*ecex_command_fn)(ecex_t *ed);
typedef int (*ecex_interactive_line_fn)(ecex_t *ed, buffer_t *buffer, size_t line, const char *payload, void *userdata);
typedef const char *(*ecex_clipboard_get_fn)(void *userdata);
typedef void (*ecex_clipboard_set_fn)(void *userdata, const char *text);
typedef int (*ecex_buffer_render_fn)(ecex_t *ed, buffer_t *buffer, ecex_draw_context_t *ctx, void *userdata);
typedef int (*ecex_buffer_tick_fn)(ecex_t *ed, buffer_t *buffer, double now_seconds, void *userdata);
typedef int (*ecex_buffer_tick_ms_fn)(ecex_t *ed, buffer_t *buffer, int now_ms, void *userdata);
typedef int (*ecex_buffer_mouse_fn)(ecex_t *ed, buffer_t *buffer, int event, int x, int y, int button, void *userdata);
typedef int (*ecex_file_handler_fn)(ecex_t *ed, buffer_t *buffer);
typedef void (*ecex_buffer_userdata_free_fn)(void *userdata);

typedef enum ecex_prompt_request {
    ECEX_PROMPT_NONE = 0,
    ECEX_PROMPT_FIND_FILE,
    ECEX_PROMPT_WRITE_FILE,
    ECEX_PROMPT_EVAL_FILE,
    ECEX_PROMPT_SWITCH_BUFFER,
    ECEX_PROMPT_KILL_BUFFER,
    ECEX_PROMPT_FORCE_KILL_BUFFER,
    ECEX_PROMPT_COMPILE,
    ECEX_PROMPT_GREP,
    ECEX_PROMPT_ISEARCH_FORWARD,
    ECEX_PROMPT_ISEARCH_BACKWARD,
} ecex_prompt_request_t;


#define ECEX_RENDER_OVERLAY 0
#define ECEX_RENDER_REPLACE_CONTENT 1

#define ECEX_MOUSE_MOVE 0
#define ECEX_MOUSE_PRESS 1
#define ECEX_MOUSE_RELEASE 2
#define ECEX_MOUSE_DRAG 3
#define ECEX_MOUSE_BUTTON_LEFT 0
#define ECEX_MOUSE_BUTTON_RIGHT 1
#define ECEX_MOUSE_BUTTON_MIDDLE 2

typedef enum ecex_draw_text_align {
    ECEX_TEXT_ALIGN_LEFT = 0,
    ECEX_TEXT_ALIGN_CENTER = 1,
    ECEX_TEXT_ALIGN_RIGHT = 2,
} ecex_draw_text_align_t;

struct ecex_draw_context {
    float x;
    float y;
    float w;
    float h;
    float content_x;
    float content_y;
    float content_w;
    float content_h;
    float font_size;
    float line_height;
    float char_width;
    size_t window_index;
    int active;
    void *internal;
};

typedef struct ecex_undo_entry {
    char *data;
    size_t len;
    size_t point;
    size_t mark;
    int mark_active;
} ecex_undo_entry_t;

typedef struct ecex_color {
    float r;
    float g;
    float b;
} ecex_color_t;

typedef struct ecex_theme {
    char *font_path;
    float font_size;

    ecex_color_t bg;
    ecex_color_t fg;

    ecex_color_t status_bg;
    ecex_color_t status_fg;
    ecex_color_t status_border;

    ecex_color_t cursor;
    ecex_color_t region_bg;
    ecex_color_t minibuffer_bg;
    ecex_color_t minibuffer_fg;

    ecex_color_t completion_fg;
    int completion_enabled;

    ecex_color_t interactive_highlight_bg;
    ecex_color_t interactive_highlight_fg;
    ecex_color_t current_line_bg;
    ecex_color_t search_bg;
    int line_numbers_enabled;
    int current_line_enabled;
} ecex_theme_t;

struct buffer {
    char *name;
    char *path;

    char *data;
    size_t len;
    size_t cap;

    size_t point;
    size_t mark;
    int mark_active;

    size_t scroll_line;
    size_t scroll_col;

    int modified;
    int read_only;

    int major_mode;

    ecex_undo_entry_t *undo_stack;
    size_t undo_count;
    size_t undo_cap;
    ecex_undo_entry_t *redo_stack;
    size_t redo_count;
    size_t redo_cap;
    int undo_disabled;

    int interactive;
    struct ecex_interactive_line_action *interactive_actions;
    size_t interactive_action_cap;
    size_t interactive_action_count;

    int media_kind;
    char *media_path;
    int media_width;
    int media_height;
    unsigned char *media_pixels;
    int media_dirty;
    unsigned int media_texture;
    int media_texture_width;
    int media_texture_height;
    void *media_pipe;
    double media_last_frame_time;
    int media_playing;
    char media_status[256];

    ecex_buffer_render_fn render_fn;
    void *render_userdata;
    ecex_buffer_userdata_free_fn render_userdata_free;
    int render_flags;

    ecex_buffer_mouse_fn mouse_fn;
    void *mouse_userdata;
    ecex_buffer_userdata_free_fn mouse_userdata_free;

    ecex_buffer_tick_fn tick_fn;
    ecex_buffer_tick_ms_fn tick_ms_fn;
    void *tick_userdata;
    ecex_buffer_userdata_free_fn tick_userdata_free;
    double tick_interval;
    double tick_last_time;
    int tick_enabled;
    int tick_uses_ms;
};

typedef struct ecex_interactive_line_action {
    size_t line;
    ecex_interactive_line_fn fn;
    char *payload;
    void *userdata;
} ecex_interactive_line_action_t;

typedef struct ecex_command {
    char *name;
    ecex_command_fn fn;
} ecex_command_t;

typedef struct ecex_keybind {
    char *key;
    char *command;
} ecex_keybind_t;

typedef struct ecex_mode_keybind {
    int mode;
    char *key;
    char *command;
} ecex_mode_keybind_t;

typedef struct ecex_major_mode {
    int id;
    char *name;
} ecex_major_mode_t;

typedef enum ecex_var_kind {
    ECEX_VAR_BYTES = 0,
    ECEX_VAR_I32 = 1,
} ecex_var_kind_t;

typedef struct ecex_var_entry {
    void *owner;
    char *name;
    void *data;
    size_t elem_size;
    size_t count;
    int kind;
    int dynamic;
} ecex_var_entry_t;

typedef struct ecex_text_entry {
    void *owner;
    int id;
    char *text;
    size_t len;
} ecex_text_entry_t;

typedef struct ecex_file_handler {
    char *extension;
    ecex_file_handler_fn fn;
} ecex_file_handler_t;

typedef struct ecex_object_entry {
    void *ptr;
    size_t size;
} ecex_object_entry_t;

struct ecex_window {
    buffer_t *buffer;
    float x;
    float y;
    float w;
    float h;
};

struct ecex {
    buffer_t **buffers;
    size_t buffer_cap;
    size_t buffer_count;

    size_t current_buffer_index;
    buffer_t *current_buffer;
    buffer_t *previous_buffer;

    ecex_window_t *windows;
    size_t window_cap;
    size_t window_count;
    size_t current_window_index;

    void **jit_modules;
    size_t jit_module_cap;
    size_t jit_module_count;

    ecex_command_t *commands;
    size_t command_cap;
    size_t command_count;

    ecex_keybind_t *keybinds;
    size_t keybind_cap;
    size_t keybind_count;

    ecex_mode_keybind_t *mode_keybinds;
    size_t mode_keybind_cap;
    size_t mode_keybind_count;

    ecex_major_mode_t *major_modes;
    size_t major_mode_cap;
    size_t major_mode_count;
    int next_major_mode_id;

    ecex_var_entry_t *vars;
    size_t var_cap;
    size_t var_count;

    ecex_text_entry_t *texts;
    size_t text_cap;
    size_t text_count;

    ecex_file_handler_t *file_handlers;
    size_t file_handler_cap;
    size_t file_handler_count;

    ecex_object_entry_t *objects;
    size_t object_cap;
    size_t object_count;

    char *last_eval_source;
    char *last_eval_filename;
    int last_eval_wrap_as_statements;

    char *last_compile_command;
    char *last_grep_command;

    ecex_prompt_request_t prompt_request;
    char prompt_message[128];

    char *config_path;

    ecex_clipboard_get_fn clipboard_get;
    ecex_clipboard_set_fn clipboard_set;
    void *clipboard_userdata;

    int should_quit;

    ecex_theme_t theme;
};

#endif