#define FOOLOS_MODULE_NAME "kernel"
#include "kernel.h"

#include <stdint.h>
#include <stddef.h> 

#include "syscalls.h"
#include "types.h"
#include "lib/logger/log.h"
#include "fifo.h"
#include "timer.h"
#include "mem.h"
#include "vmem.h"
#include "mp.h"
#include "interrupts.h"
#include "multiboot.h"
#include "ringbuffer.h"
#include "task.h"
#include "multiboot.h"
#include "terminal/terminal.h"
#include "driver/screen.h"

/* F00L 0S Entry point (called directly from asm/multiboot.asm */
void kernel_main(uint32_t eax,uint32_t ebx)
{
    serial_init();

    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%s - BUILD: git-%s (%s %s)",
        KERNEL_NAME,GIT_REVISION,__DATE__,__TIME__);

    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"COM 1 - initialized");

    uint64_t epoch_time=timer_init();
    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"PIT - initialized. %u seconds passed since 1970.",epoch_time);

    // KEYBOARD DRIVER
    keyboard_init(0); //sstdin

    // MOUSE DRIVER
    mouse_init();

    // GDT
    gdt_setup();

    // MULTIBOOT HEADER
    multiboot_information *info=get_multiboot(eax, ebx);
    
    // Gather Info about other processors. (APs = application processors) // ACPI or MP
    //smp_processors procdata;    
    // 
    //if(!acpi_find(&procdata))
    //	if(!mp_find(&procdata))
    //	    panic(FOOLOS_MODULE_NAME,"ACPI and MP search failed! I do not want to continue!");

    //  MEMORY INIT (allows allocating and deaclloating physical memory)
    uint32_t kernel_blocks=mem_init(info);

    // Mount Root EXT2 ramimage (needs to be done before other processors started, because of /boot/mp.bin)
    fs_mount(info);

    // Start the other Processors (before paging because apic addr etc..?)
    //TODO: !!! Check commented out sleep ()!!!
    // https://wiki.osdev.org/Symmetric_Multiprocessing
    // smp_log_procdata(&procdata);
    // smp_start_aps(&procdata,"/boot/mp.bin"); //will be copied over mbr
    
    // VIRTUAL MEMORY (paging)
    pdirectory *dir=vmem_init(kernel_blocks,(uint32_t)info->framebuffer_addr);

    // PCI Bus
    //pci_init();
    
    // INIT VESA: TODO: stop and say if not 32bit colormode!
    uint32_t addr=kballoc(1);
    fs_content("/binfont.bin",addr,0x100); // copy 0x100 bytes to 0x7000     
    vesa_init(info->vbe_control_info,info->vbe_mode_info,addr);

    // STREAMS
    uint32_t sstdin  = syscall_open("stdin",0,0);   // stdin  0
    uint32_t sstdout = syscall_open("term",0,0);    // stdout 1
    uint32_t sstderr = syscall_open("stderr",0,0);  // stderr 2

    // START INTERRUPTS (code segment: 0x08)
    int_init(0x08);

    // INIT MULTITASKING (and switch to our pseudo-usermode)
    task_init(dir); 

    // we should never reach this
    panic(FOOLOS_MODULE_NAME,"reached end of kernel.c !!");

}