#include <glib.h>
#include <spice.h>

#define IBUFSIZE 1024
#define MAX_ESC_PARAMS 16

typedef struct TextAttributes {
    unsigned int fgcol:4;
    unsigned int bgcol:4;
    unsigned int bold:1;
    unsigned int uline:1;
    unsigned int blink:1;
    unsigned int invers:1;
    unsigned int unvisible:1;
    unsigned int selected:1;
} TextAttributes;

typedef struct TextCell {
    gunichar2 ch;
    TextAttributes attrib;
} TextCell;

#define COMMANDS_SIZE (1024)
#define MAX_HEIGHT 1440
#define MAX_WIDTH 2560

typedef struct SpiceTermOptions {
    guint timeout;
    int port;
    char *addr;
    char *keymap;
    gboolean noauth;
    gboolean sasl;
} SpiceTermOptions;

typedef struct SpiceScreen SpiceScreen;

typedef struct CachedImage {
    uint8_t *bitmap;
    int cache_id;
} CachedImage;

struct SpiceScreen {
    SpiceCoreInterface *core;
    SpiceServer *server;

    QXLInstance qxl_instance;
    QXLWorker *qxl_worker;

    uint8_t primary_surface[MAX_HEIGHT * MAX_WIDTH * 4];
    int primary_height;
    int primary_width;

    SpiceTimer *conn_timeout_timer;
    SpiceWatch *mwatch; /* watch master pty */

    // Current mode (set by create_primary)
    int width;
    int height;

    GCond command_cond;
    GMutex command_mutex;

    int commands_end;
    int commands_start;
    struct QXLCommandExt* commands[COMMANDS_SIZE];

    //cache for glyphs bitmaps
    GHashTable *image_cache;
    
    gboolean cursor_set;

    // callbacks
    void (*on_client_connected)(SpiceScreen *spice_screen);
    void (*on_client_disconnected)(SpiceScreen *spice_screen);
};

SpiceScreen* spice_screen_new(SpiceCoreInterface* core, uint32_t width, uint32_t height, SpiceTermOptions *opts);

void spice_screen_resize(SpiceScreen *spice_screen, uint32_t width, uint32_t height);
void spice_screen_draw_char(SpiceScreen *spice_screen, int x, int y, gunichar2 ch, TextAttributes attrib);
void spice_screen_scroll(SpiceScreen *spice_screen, int x1, int y1, int x2, int y2, int src_x, int src_y);
void spice_screen_clear(SpiceScreen *spice_screen, int x1, int y1, int x2, int y2);
uint32_t spice_screen_get_width(void);
uint32_t spice_screen_get_height(void);

typedef struct spiceTerm {
    int pty; // pty file descriptor

    int width;
    int height;

    int total_height;
    int scroll_height;
    int y_base;
    int y_displ;
    int altbuf:1;

    unsigned int utf8:1; // utf8 mode
    gunichar utf_char;   // used by utf8 parser
    int utf_count;       // used by utf8 parser

    TextAttributes default_attrib;

    TextCell *cells;
    TextCell *altcells;

    SpiceScreen *screen;
    SpiceKbdInstance keyboard_sin;
    SpiceCharDeviceInstance vdagent_sin;

    // cursor
    TextAttributes cur_attrib;
    TextAttributes cur_attrib_saved;
    int tty_state; // 0 - normal, 1 - ESC, 2 - CSI
    int cx; // cursor x position
    int cy; // cursor y position
    int cx_saved; // saved cursor x position
    int cy_saved; // saved cursor y position
    int esc_buf[MAX_ESC_PARAMS];
    int esc_count;
    int esc_ques;
    int esc_has_par;
    char osc_textbuf[4096];
    char osc_cmd;
    int region_top;
    int region_bottom;

    unsigned int charset:1; // G0 or G1
    unsigned int charset_saved:1; // G0 or G1
    unsigned int g0enc:2;
    unsigned int g0enc_saved:2;
    unsigned int g1enc:2;
    unsigned int g1enc_saved:2;
    unsigned int cur_enc:2;
    unsigned int cur_enc_saved:2;

    // input buffer
    char ibuf[IBUFSIZE];
    int ibuf_count;

    gunichar2 *selection;
    int selection_len;

    unsigned int mark_active:1;

    unsigned int report_mouse:1;

} spiceTerm;

void init_spiceterm(spiceTerm *vt, uint32_t width, uint32_t height);
void spiceterm_refresh(spiceTerm *vt);

void spiceterm_resize(spiceTerm *vt, uint32_t width, uint32_t height);
void spiceterm_virtual_scroll(spiceTerm *vt, int lines);
void spiceterm_clear_selection(spiceTerm *vt);
void spiceterm_motion_event(spiceTerm *vt, uint32_t x, uint32_t y, 
                            uint32_t buttons);

void spiceterm_respond_esc(spiceTerm *vt, const char *esc);
void spiceterm_respond_data(spiceTerm *vt, int len, uint8_t *data);
void spiceterm_update_watch_mask(spiceTerm *vt, gboolean writable);

spiceTerm *spiceterm_create(uint32_t width, uint32_t height, SpiceTermOptions *opts);

gboolean vdagent_owns_clipboard(spiceTerm *vt);
void vdagent_request_clipboard(spiceTerm *vt);
void vdagent_grab_clipboard(spiceTerm *vt);

int pve_auth_verify(const char *clientip, const char *username, const char *passwd);
void pve_auth_set_path(char *path);
void pve_auth_set_permissions(char *perm);