#ifndef SEEN_TYPES_H
#define SEEN_TYPES_H

#include <curses.h>
#include <stdio.h>
#include <sys/types.h>

/* Forward references and typedefs */
#define STRUCT(x) struct x; typedef struct x x
STRUCT(ca_t);
STRUCT(line_t);
STRUCT(history_t);
STRUCT(screen_t);
STRUCT(config_t);
STRUCT(eat_t);
STRUCT(term_t);
STRUCT(input_t);
STRUCT(status_t);
STRUCT(win_t);
STRUCT(app_t);
typedef enum {TERMINAL, INPUT, STATUS} win_type_t;

/* Adapted from konsole */
#define DEFAULT_FG_COLOR 0
#define DEFAULT_BG_COLOR 1
#define DEFAULT_RENDITION 0
#define RE_BOLD 1
#define RE_BLINK 2
#define RE_UNDERLINE 4
#define RE_REVERSE 8

/* Character with rendition information */
struct ca_t {
	unsigned int c : 8;	/* Character ordinal */
	unsigned int f : 8;	/* Foreground */
	unsigned int b : 8;	/* Background */
	unsigned int r : 8;	/* Condensed rendition */
};

/* Single line of history */
struct line_t {
	int size;		/* Length of line */
	ca_t c[0];		/* Character data */
};

/* History for a particular application terminal window */
struct history_t {
	int size;		/* Number of lines */
	line_t** l;		/* Pointers to lines */
};

/* Entire display */
struct screen_t {
	WINDOW* c_win;		/* Window mapped to entire screen */
	int size;		/* Number of contained windows */
	win_t** wins;		/* List of windows in screen */
};

/* Global configuration */
struct config_t {
	/* Key bindings */
	/* Defaults */
	/* Command macros */
};

/* State information for eat */
struct eat_t {
	screen_t* screen;	/* The screen this instance is running on */
	config_t* cfg;		/* Global configuration */
	app_t** apps;		/* Null-terminated list of apps managed by eat*/
	/* ipc */
};

/* Terminal state */
struct term_t {
#if 0
	/* Terminal input preprocessing */
	int canonical;		/* TODO: elaborate */
#endif
	/* Terminal output */
	int x, y;		/* Cursor position */
#if 0
	ca_t attr;		/* Attributes */
	int autolf;		/* Automatically line feed? */
	/* Escape sequence handling */
	int esc_state;		/* State of the escape sequence decoder */
	/* Extra configuration */
	int dup_prompt;		/* Duplicate prompt in input window? */
	int dup_input;		/* Duplicate input in terminal window? */
	int show_cursor;	/* Show insertion point in terminal? */
#endif
	/* History */
	int sb_y;
	history_t* history;
};

/* Input window */
struct input_t {
	int size;		/* Length of current line */
	char* line;		/* Current line being edited */
};

/* Status window */
struct status_t {
	/* Status line format */
};

/* Application window */
struct win_t {
	int l, t, r, b;		/* Left, top, right, bottom coordinates */
	int w, h;		/* Onscreen size (reported to application) */
	WINDOW* c_win;		/* Corresponding curses window or pad */
	win_type_t type;	/* Type of window */
	void* x;		/* Extended information; depends on type */
};

/* Application running within eat */
struct app_t {
	pid_t pid;		/* Application's pid */
	int p_desc;		/* File descriptor for application's pty */
	FILE* p_in;		/* Input stream for pty */
	FILE* p_out;		/* Output stream for pty */
	win_t* win;		/* Window application is running in */
};

#endif