#include <kernel/util/disasm.h>
#include <kernel/devices/earlyterm.h>
#include <kernel/drivers/screen.h>
#include <display.h>
#include <stdio.h>
#include <string.h>

// Menu string format.
// TODO: FIND BETTER WAY TROUDUC'
const char *content_string[26] = {
	"General registers:",
	"r0           = %#.8x",
	"r1           = %#.8x",
	"r2           = %#.8x",
	"r3           = %#.8x",
	"r4           = %#.8x",
	"r5           = %#.8x",
	"r6           = %#.8x",
	"r7           = %#.8x",
	"r8           = %#.8x",
	"r9           = %#.8x",
	"r10          = %#.8x",
	"r11          = %#.8x",
	"r12          = %#.8x",
	"r13          = %#.8x",
	"r14          = %#.8x",
	"r15          = %#.8x",
	"\0",
	"Special registers:",
	"GBR          = %p",
	"MACL         = %p",
	"MACH         = %p",
	"SR           = %p",
	"PC           = %p",
	"PR           = %p",
	NULL
};

static void cursor_update(ubc_session_t *session)
{
	extern struct earlyterm earlyterm;

	if (session->key.up == 1 && session->menu.context.cursor > 0)
		session->menu.context.cursor = session->menu.context.cursor - 1;
	if (session->key.down == 1
			&& (int)session->menu.context.cursor < 24 - earlyterm.display.ws_row)
		session->menu.context.cursor = session->menu.context.cursor + 1;
}

//
// menu_context - Show programe context.
// @note:
// This is not the best way to do the job,
// but for now the goal is the create a fonctionnal
// on-calc debugger.
//
void disasm_menu_show_context(ubc_session_t *session)
{
	extern struct earlyterm earlyterm;
	char line[64];

	// Menu string data
	uint32_t content_data[25] = {
		0,
		session->context->reg[0],
		session->context->reg[1],
		session->context->reg[2],
		session->context->reg[3],
		session->context->reg[4],
		session->context->reg[5],
		session->context->reg[6],
		session->context->reg[7],
		session->context->reg[8],
		session->context->reg[9],
		session->context->reg[10],
		session->context->reg[11],
		session->context->reg[12],
		session->context->reg[13],
		session->context->reg[14],
		session->context->reg[15],
		0,
		0,
		session->context->gbr,
		session->context->macl,
		session->context->mach,
		session->context->ssr,
		session->context->spc,
		session->context->pr
	};

	// Update cursor position.
	cursor_update(session);

	// Clear VRAM.
	dclear(&earlyterm.display);

	// Display menu based on cursor position.
	memset(line, 0x00, 64);
	for (int i = 0 ; content_string[i + session->menu.context.cursor] != NULL
			&& i < earlyterm.display.ws_row ; ++i)
	{
		sprintf(line,
			content_string[i + session->menu.context.cursor],
			content_data[i + session->menu.context.cursor]
		);
		dprint(&earlyterm.display, 0, i, line);
	}

	// Display VRAM
	screen_update(earlyterm.display.vram);
}