#define _POSIX_C_SOURCE 200809L

#include "../../tty.h"

#include <ctype.h>
#include <fx/term/tty.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define ANSI_BOLD_ON          "1"
#define ANSI_BOLD_OFF         "22"
#define ANSI_ITALIC_ON        "3"
#define ANSI_ITALIC_OFF       "23"
#define ANSI_UNDERLINE_ON     "4"
#define ANSI_UNDERLINE_OFF    "24"

#define ANSI_DEFAULTCOLOUR_FG "39"
#define ANSI_DEFAULTCOLOUR_BG "49"

#define ANSI_256COLOUR_FG     "38;5"
#define ANSI_256COLOUR_BG     "48;5"

#define ANSI_TRUECOLOUR_FG    "38;2"
#define ANSI_TRUECOLOUR_BG    "48;2"

enum tty_flags {
	FX_TTY_INIT = 0x01u,
	FX_TTY_INTERACTIVE = 0x02u,
};

struct fx_tty {
	FILE *t_in, *t_out;
	enum tty_flags t_flags;
	struct fx_tty_vmode t_vmode;
	unsigned char t_mcount;
	struct tty_format_buf t_format_buf;
};

static struct fx_tty std = {0};
static struct fx_tty err = {0};

static const char *ansi_colour16_fg[] = {
	[FX_TTY_COLOUR16_BLACK] = "30",
	[FX_TTY_COLOUR16_RED] = "31",
	[FX_TTY_COLOUR16_GREEN] = "32",
	[FX_TTY_COLOUR16_YELLOW] = "33",
	[FX_TTY_COLOUR16_FX] = "34",
	[FX_TTY_COLOUR16_MAGENTA] = "35",
	[FX_TTY_COLOUR16_CYAN] = "36",
	[FX_TTY_COLOUR16_WHITE] = "37",
	[FX_TTY_COLOUR16_BRIGHT_BLACK] = "90",
	[FX_TTY_COLOUR16_BRIGHT_RED] = "91",
	[FX_TTY_COLOUR16_BRIGHT_GREEN] = "92",
	[FX_TTY_COLOUR16_BRIGHT_YELLOW] = "93",
	[FX_TTY_COLOUR16_BRIGHT_FX] = "94",
	[FX_TTY_COLOUR16_BRIGHT_MAGENTA] = "95",
	[FX_TTY_COLOUR16_BRIGHT_CYAN] = "96",
	[FX_TTY_COLOUR16_BRIGHT_WHITE] = "97",
};

static const char *ansi_colour16_bg[] = {
	[FX_TTY_COLOUR16_BLACK] = "40",
	[FX_TTY_COLOUR16_RED] = "41",
	[FX_TTY_COLOUR16_GREEN] = "42",
	[FX_TTY_COLOUR16_YELLOW] = "43",
	[FX_TTY_COLOUR16_FX] = "44",
	[FX_TTY_COLOUR16_MAGENTA] = "45",
	[FX_TTY_COLOUR16_CYAN] = "46",
	[FX_TTY_COLOUR16_WHITE] = "47",
	[FX_TTY_COLOUR16_BRIGHT_BLACK] = "100",
	[FX_TTY_COLOUR16_BRIGHT_RED] = "101",
	[FX_TTY_COLOUR16_BRIGHT_GREEN] = "102",
	[FX_TTY_COLOUR16_BRIGHT_YELLOW] = "103",
	[FX_TTY_COLOUR16_BRIGHT_FX] = "104",
	[FX_TTY_COLOUR16_BRIGHT_MAGENTA] = "105",
	[FX_TTY_COLOUR16_BRIGHT_CYAN] = "106",
	[FX_TTY_COLOUR16_BRIGHT_WHITE] = "107",
};

static void init_tty(struct fx_tty *tty, FILE *in, FILE *out)
{
}

struct fx_tty *z__fx_tty_get_std(void)
{
	if (!(std.t_flags & FX_TTY_INIT)) {
		init_tty(&std, stdin, stdout);
	}

	return &std;
}

struct fx_tty *z__fx_tty_get_err(void)
{
	if (!(err.t_flags & FX_TTY_INIT)) {
		init_tty(&err, NULL, stderr);
	}

	return &err;
}

struct tty_format_buf *z__fx_tty_get_format_buf(struct fx_tty *tty)
{
	return &tty->t_format_buf;
}

void z__fx_tty_putc(struct fx_tty *tty, char c)
{
	fputc(c, tty->t_out);
}

bool fx_tty_is_interactive(const struct fx_tty *tty)
{
	return (tty->t_flags & FX_TTY_INTERACTIVE) == FX_TTY_INTERACTIVE;
}

void fx_tty_set_mode(struct fx_tty *tty, enum fx_tty_mode mode)
{
}

void fx_tty_reset_vmode(struct fx_tty *tty)
{
}

void fx_tty_flush(struct fx_tty *tty)
{
}

static int compare_colour(
	const struct fx_tty_colour *a,
	const struct fx_tty_colour *b)
{
	if (a->c_mode != b->c_mode) {
		return -1;
	}

	switch (a->c_mode) {
	case FX_TTY_COLOUR_16:
		if (a->c_16.value != b->c_16.value) {
			return -1;
		}
		break;
	case FX_TTY_COLOUR_256:
		if (a->c_256.value != b->c_256.value) {
			return -1;
		}
		break;
	case FX_TTY_COLOUR_TRUE:
		if (a->c_true.r != b->c_true.r) {
			return -1;
		}

		if (a->c_true.g != b->c_true.g) {
			return -1;
		}

		if (a->c_true.b != b->c_true.b) {
			return -1;
		}
		break;
	default:
		break;
	}

	return 0;
}

static int compare_vmode(
	const struct fx_tty_vmode *a,
	const struct fx_tty_vmode *b)
{
	if (a->v_attrib != b->v_attrib) {
		return -1;
	}

	if (compare_colour(&a->v_fg, &b->v_fg) != 0) {
		return -1;
	}

	if (compare_colour(&a->v_bg, &b->v_bg) != 0) {
		return -1;
	}

	return 0;
}

void fx_tty_set_vmode(struct fx_tty *tty, const struct fx_tty_vmode *vmode)
{
}

fx_keycode fx_tty_read_key(struct fx_tty *tty)
{
	return FX_KEY_EOF;
}

void fx_tty_move_cursor_x(
	struct fx_tty *tty,
	enum fx_tty_position_base base,
	int pos)
{
}

void fx_tty_move_cursor_y(
	struct fx_tty *tty,
	enum fx_tty_position_base base,
	int pos)
{
}

void fx_tty_clear(struct fx_tty *tty, enum fx_tty_clear_mode mode)
{
}

enum fx_status fx_tty_get_dimensions(
	struct fx_tty *tty,
	unsigned int *w,
	unsigned int *h)
{
	return -1;
}

enum fx_status fx_tty_get_cursor_position(
	struct fx_tty *tty,
	unsigned int *w,
	unsigned int *h)
{
	return -1;
}