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#include <io/io.h>
#include <io/stream.h>
#include <string.h>
#include <malloc.h>
#include <libc.h>
#include <ipc/ipc.h>
#include <ipc/ns.h>
#include <ipc/fb.h>
#include <ipc/services.h>
#include <console.h>

#define FDS 32

typedef struct stream_t {
    pwritefn_t w;
    preadfn_t r;
    void * param;
} stream_t;

int console_phone = -1;

stream_t streams[FDS] = {{0, 0, 0}};

/*
ssize_t write_stdout(void *param, const void * buf, size_t count);
ssize_t write_stdout(void *param, const void * buf, size_t count)
{
    return (ssize_t) __SYSCALL3(SYS_IO, 1, (sysarg_t) buf, (sysarg_t) count);
}*/

static ssize_t write_stderr(void *param, const void *buf, size_t count)
{
    return count;
    //return (ssize_t) __SYSCALL3(SYS_IO, 1, (sysarg_t) buf, (sysarg_t) count);
}

static char read_stdin(void)
{
    ipcarg_t r0,r1;
    ipc_call_sync_2(console_phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1);
    
    return r0;
    //return (ssize_t) __SYSCALL3(SYS_IO, 1, (sysarg_t) buf, (sysarg_t) count);
}
static ssize_t write_stdout(void *param, const void *buf, size_t count)
{
    int i;
    ipcarg_t r0,r1;

    for (i = 0; i < count; i++)
        ipc_call_sync_2(console_phone, CONSOLE_PUTCHAR, 0, ((const char *)buf)[i], &r0, &r1);
    
    return count;
    //return (ssize_t) __SYSCALL3(SYS_IO, 1, (sysarg_t) buf, (sysarg_t) count);
}



static stream_t open_stdin(void)
{
    stream_t stream;
    int phoneid;
    int res;
    
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
            usleep(10000);
        }
    }
    
    stream.r = read_stdin;
    stream.param = 0;
    return stream;
}

static stream_t open_stdout(void)
{
    stream_t stream;
    int res;
    
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
            volatile int a;
            for (a = 0; a < 1048576; a++);
        }
    }
    
    stream.w = write_stdout;
    stream.param = 0;
    return stream;
}

fd_t open(const char *fname, int flags)
{
    int c = 0;
    
    while (((streams[c].w) || (streams[c].r)) && (c < FDS))
        c++;
    if (c == FDS)
        return EMFILE;
    
    if (!strcmp(fname, "stdin")) {
        streams[c] = open_stdin();
        return c;
    }
    
    if (!strcmp(fname, "stdout")) {
        //streams[c].w = write_stdout;
        //return c;
        streams[c] = open_stdout();
        return c;
    }
    
    if (!strcmp(fname, "stderr")) {
        streams[c].w = write_stderr;
        return c;
    }
}


ssize_t write(int fd, const void *buf, size_t count)
{
    if (fd < FDS)
        return streams[fd].w(streams[fd].param, buf, count);
    
    return 0;
}