import pyopencl as cl
import numpy as np
import gzip
import cpio  # hypothetical minimal cpio parser
import threading
import time

# ----------------------------
# 1️⃣ HDGL lattice memory assumed initialized
# ----------------------------
# lattice_mem, lattice_buf, KERNEL_OFFSET already provisioned

# ----------------------------
# 2️⃣ Syscall + Process Table
# ----------------------------
class HDGLProcess:
    def __init__(self, pid, entry_point):
        self.pid = pid
        self.ip = entry_point
        self.running = True

class HDGLSyscall:
    def __init__(self):
        self.files = {}
        self.next_fd = 3
        self.next_pid = 1
        self.processes = []

    def open(self, path, mode):
        fd = self.next_fd
        self.files[fd] = {"path": path, "pos": 0, "mode": mode, "data": b""}
        self.next_fd += 1
        return fd

    def read(self, fd, size):
        f = self.files[fd]
        data = f["data"][f["pos"]:f["pos"]+size]
        f["pos"] += len(data)
        return data

    def write(self, fd, data):
        f = self.files[fd]
        f["data"] += data
        f["pos"] += len(data)
        return len(data)

    def exit(self, pid, code=0):
        for p in self.processes:
            if p.pid == pid:
                p.running = False
        print(f"[Syscall] Process {pid} exited with code {code}")

    def fork(self, entry_point):
        pid = self.next_pid
        self.next_pid += 1
        proc = HDGLProcess(pid, entry_point)
        self.processes.append(proc)
        return pid

syscall = HDGLSyscall()

# ----------------------------
# 3️⃣ Virtual Filesystem
# ----------------------------
syscall.open("/dev/null", "rw")
syscall.open("/dev/console", "rw")
syscall.open("/proc/cpuinfo", "r").data = b"HDGL virtual CPU\n"

# ----------------------------
# 4️⃣ Initramfs loader
# ----------------------------
def load_initramfs(initramfs_bytes):
    with gzip.GzipFile(fileobj=initramfs_bytes) as gz:
        cpio_data = gz.read()
    archive = cpio.CPIOArchive(cpio_data)
    for file in archive.files:
        fd = syscall.open(file.name, "r")
        syscall.files[fd]["data"] = file.data
        print(f"[Initramfs] Loaded {file.name} ({len(file.data)} bytes)")

# ----------------------------
# 5️⃣ Scheduler
# ----------------------------
def hdgl_scheduler():
    while True:
        active = [p for p in syscall.processes if p.running]
        if not active:
            break
        for proc in active:
            # Execute minimal “instruction”
            proc.ip += 1  # placeholder
            if proc.ip % 1000 == 0:
                print(f"[HDGL] Process {proc.pid} tick {proc.ip}")
        time.sleep(0.001)  # simulate CPU tick

# ----------------------------
# 6️⃣ Launch init process
# ----------------------------
def hdgl_boot():
    init_pid = syscall.fork(KERNEL_OFFSET)
    print(f"[HDGL] Init process PID {init_pid} started")
    scheduler_thread = threading.Thread(target=hdgl_scheduler)
    scheduler_thread.start()
    scheduler_thread.join()
    print("[HDGL] All processes exited. Minimal Debian supervisor shutdown.")

# ----------------------------
# 7️⃣ Boot Debian
# ----------------------------
print("[HDGL] Booting full Debian inside lattice...")
initramfs_bytes = open("initramfs.cpio.gz", "rb")
load_initramfs(initramfs_bytes)
hdgl_boot()
