/*
 * DWN - Desktop Window Manager
 * retoor <retoor@molodetz.nl>
 * Main header with shared types and global state
 */

#ifndef DWN_H
#define DWN_H

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/Xinerama.h>
#include <X11/extensions/Xrandr.h>
#include <X11/Xft/Xft.h>
#include <stdbool.h>
#include <stdint.h>

/* Version */
#define DWN_VERSION "1.0.0"
#define DWN_NAME "DWN"

/* Limits */
#define MAX_CLIENTS 256
#define MAX_WORKSPACES 9
#define MAX_MONITORS 8
#define MAX_NOTIFICATIONS 32
#define MAX_KEYBINDINGS 64

/* Default dimensions */
#define DEFAULT_BORDER_WIDTH 2
#define DEFAULT_TITLE_HEIGHT 24
#define DEFAULT_PANEL_HEIGHT 28
#define DEFAULT_GAP 4

/* Common error/status codes */
typedef enum {
    DWN_OK = 0,
    DWN_ERROR = -1,
    DWN_ERROR_INVALID_ARG = -2,
    DWN_ERROR_NO_MEMORY = -3,
    DWN_ERROR_NOT_FOUND = -4,
    DWN_ERROR_DISPLAY = -5,
    DWN_ERROR_IO = -6
} DwnStatus;

/* Layout types */
typedef enum {
    LAYOUT_TILING,
    LAYOUT_FLOATING,
    LAYOUT_MONOCLE,
    LAYOUT_COUNT
} LayoutType;

/* Focus modes */
typedef enum {
    FOCUS_CLICK,
    FOCUS_FOLLOW
} FocusMode;

/* Client state flags */
typedef enum {
    CLIENT_NORMAL     = 0,
    CLIENT_FLOATING   = (1 << 0),
    CLIENT_FULLSCREEN = (1 << 1),
    CLIENT_URGENT     = (1 << 2),
    CLIENT_MINIMIZED  = (1 << 3),
    CLIENT_STICKY     = (1 << 4)
} ClientFlags;

/* Forward declarations */
typedef struct Client Client;
typedef struct Workspace Workspace;
typedef struct Monitor Monitor;
typedef struct Panel Panel;
typedef struct Config Config;

/* Client structure - represents a managed window */
struct Client {
    Window window;           /* Application window */
    Window frame;            /* Frame window (decoration) */
    int x, y;                /* Position */
    int width, height;       /* Size */
    int old_x, old_y;        /* Previous position (for floating restore) */
    int old_width, old_height;
    int border_width;
    uint32_t flags;          /* ClientFlags bitmask */
    unsigned int workspace;  /* Current workspace (0-8) */
    char title[256];         /* Window title */
    char class[64];          /* Window class */
    Client *next;            /* Linked list */
    Client *prev;
};

/* Monitor structure - represents a physical display */
struct Monitor {
    int x, y;
    int width, height;
    int index;
    bool primary;
};

/* Workspace structure */
struct Workspace {
    Client *clients;         /* Head of client list */
    Client *focused;         /* Currently focused client */
    LayoutType layout;       /* Current layout */
    float master_ratio;      /* Ratio for master area in tiling */
    int master_count;        /* Number of windows in master area */
    char name[32];           /* Workspace name */
};

/* Panel widget types */
typedef enum {
    WIDGET_WORKSPACES,
    WIDGET_TASKBAR,
    WIDGET_CLOCK,
    WIDGET_SYSTRAY,
    WIDGET_AI_STATUS,
    WIDGET_SEPARATOR
} WidgetType;

/* Global state - singleton pattern */
typedef struct {
    Display *display;
    int screen;
    Window root;
    int screen_width;
    int screen_height;

    /* Monitors */
    Monitor monitors[MAX_MONITORS];
    int monitor_count;

    /* Workspaces */
    Workspace workspaces[MAX_WORKSPACES];
    int current_workspace;

    /* Clients */
    Client *client_list;     /* All clients */
    int client_count;

    /* Panels */
    Panel *top_panel;
    Panel *bottom_panel;

    /* Configuration */
    Config *config;

    /* State */
    bool running;
    bool ai_enabled;

    /* Graphics contexts */
    GC gc;
    XFontStruct *font;
    XftFont *xft_font;           /* Xft font for UTF-8 rendering */
    Colormap colormap;

    /* Drag state */
    Client *drag_client;
    int drag_start_x, drag_start_y;
    int drag_orig_x, drag_orig_y;
    int drag_orig_w, drag_orig_h;
    bool resizing;
} DWNState;

/* Global state accessor */
extern DWNState *dwn;

/* Core functions */
int dwn_init(void);
void dwn_cleanup(void);
void dwn_run(void);
void dwn_quit(void);

/* Event handlers */
void dwn_handle_event(XEvent *ev);

#endif /* DWN_H */