#include <stdint.h>
#include <terminal.h>
#include <mittos/graphics.h>
#include <memory.h>

gfx_context kernel_fb;
gfx_context *term_fb;
static int setup = 0;

void fbterm_movecursor(unsigned int cursor) {
    (void) cursor;
}

void fbterm_flush(struct vga_cell *buffer) {
    if(!setup) return;
    int i = 0;
    for(int row = 0; row < VGA_ROWS; row++) {
        for(int col=0; col < VGA_COLS; col++) {
            putCharacter(term_fb, col*8, row*16, 0xebdbb2, 0x282828, (char)buffer[i++].c);
        }
    }
    flip(term_fb);
}

void fbterm_init(struct fbinfo *fbinfo) {
    kernel_fb.width = fbinfo->framebuffer_width;
    kernel_fb.height = fbinfo->framebuffer_height;
    kernel_fb.bpp = fbinfo->framebuffer_bpp/8;
    kernel_fb.pitch = fbinfo->framebuffer_pitch/kernel_fb.bpp;
    kernel_fb.addr = P2V(fbinfo->framebuffer_addr);
    kernel_fb.size = fbinfo->framebuffer_pitch * (kernel_fb.height);
    kernel_fb.buffer = calloc(1, kernel_fb.size);

    for(
        uintptr_t p = (uintptr_t)kernel_fb.addr;
        p < ((uintptr_t)kernel_fb.addr + kernel_fb.size);
        p += PAGE_SIZE
    ) {
        vmm_set_page(kernel_P4, p, V2P(p), PAGE_GLOBAL | PAGE_WRITE | PAGE_PRESENT);
    }

    draw_rect(&kernel_fb, 20, 20, 8*VGA_COLS+8, 16*VGA_ROWS+8, RGB(255, 0, 0));
    flip(&kernel_fb);
    term_fb = framebuffer_make_subcontext(&kernel_fb, 24, 24, 8*VGA_COLS, 16*VGA_ROWS);
    flip(term_fb);
    setup = 1;

    draw_line(&kernel_fb, 750, 850, 120, 120, RGB(255,0,0));
    draw_line(&kernel_fb, 750, 750, 120, 220, RGB(0,255,0));
    draw_line(&kernel_fb, 750, 850, 120, 220, RGB(0,0,255));
    draw_line(&kernel_fb, 750, 800, 120, 220, RGB(255,0,255));
    draw_line(&kernel_fb, 750, 850, 120, 170, RGB(255,255,0));
    flip(&kernel_fb);
}