import pyopencl as cl
import numpy as np

# ----------------------------
# CONFIGURATION
# ----------------------------
MEM_SIZE = 512*1024     # HDGL memory in 32-bit words
NUM_PROCS = 4           # parallel processes
CONSOLE_SIZE = 256      # per-process console

# ----------------------------
# GPU CONTEXT
# ----------------------------
ctx = cl.create_some_context()
queue = cl.CommandQueue(ctx)

# ----------------------------
# ALLOCATE BUFFERS
# ----------------------------
mem = np.zeros(MEM_SIZE, dtype=np.uint32)
regs = np.zeros(NUM_PROCS*4, dtype=np.uint32)
pc = np.zeros(NUM_PROCS, dtype=np.uint32)
console = np.zeros(NUM_PROCS*CONSOLE_SIZE, dtype=np.uint32)
fs = np.zeros(1024*1024, dtype=np.uint32)  # virtual FS

mem_buf = cl.Buffer(ctx, cl.mem_flags.READ_WRITE | cl.mem_flags.COPY_HOST_PTR, hostbuf=mem)
regs_buf = cl.Buffer(ctx, cl.mem_flags.READ_WRITE | cl.mem_flags.COPY_HOST_PTR, hostbuf=regs)
pc_buf = cl.Buffer(ctx, cl.mem_flags.READ_WRITE | cl.mem_flags.COPY_HOST_PTR, hostbuf=pc)
console_buf = cl.Buffer(ctx, cl.mem_flags.READ_WRITE | cl.mem_flags.COPY_HOST_PTR, hostbuf=console)
fs_buf = cl.Buffer(ctx, cl.mem_flags.READ_WRITE | cl.mem_flags.COPY_HOST_PTR, hostbuf=fs)

# ----------------------------
# MONOLITHIC HDGL KERNEL
# ----------------------------
kernel_source = """
__kernel void hdgl_monolith(
    __global uint *mem,
    __global uint *regs,
    __global uint *pc,
    __global uint *console,
    __global uint *fs,
    const uint mem_size,
    const uint num_procs
){
    uint pid = get_global_id(0);
    uint my_pc = pc[pid];
    uint reg0 = regs[pid*4 + 0];
    uint reg1 = regs[pid*4 + 1];
    uint reg2 = regs[pid*4 + 2];
    uint reg3 = regs[pid*4 + 3];
    uint co = pid * 256;

    for(uint tick=0; tick<4096; tick++){
        if(my_pc >= mem_size) break;
        uint instr = mem[my_pc];
        uint opcode = (instr >> 24) & 0xFF;
        uint operand = instr & 0xFFFFFF;

        switch(opcode){
            case 0x00: my_pc++; break;                     // NOP
            case 0x01: reg0 += operand; my_pc++; break;   // ADD
            case 0x02: reg0 -= operand; my_pc++; break;   // SUB
            case 0x03: reg1 = fs[operand]; my_pc++; break; // LOAD FS
            case 0x04: fs[operand] = reg0; my_pc++; break; // STORE FS
            case 0x08: console[co++] = reg0; my_pc++; break; // OUT
            case 0xFE: my_pc = mem_size; break;            // HALT
            default: my_pc++; break;
        }
    }

    pc[pid] = my_pc;
    regs[pid*4 + 0] = reg0;
    regs[pid*4 + 1] = reg1;
    regs[pid*4 + 2] = reg2;
    regs[pid*4 + 3] = reg3;
}
"""

program = cl.Program(ctx, kernel_source).build()

# ----------------------------
# LOAD MINIMAL DEBIAN BINARY
# ----------------------------
# Example: write a few instructions into HDGL memory for demo
# Replace with real Debian ELF parsing/loading
mem[0] = 0x01000005  # ADD 5
mem[1] = 0x08000000  # OUT reg0
mem[2] = 0xFE000000  # HALT

cl.enqueue_copy(queue, mem_buf, mem)

# ----------------------------
# EXECUTE MONOLITHIC HDGL
# ----------------------------
program.hdgl_monolith(queue, (NUM_PROCS,), None,
                      mem_buf, regs_buf, pc_buf, console_buf, fs_buf,
                      np.uint32(MEM_SIZE), np.uint32(NUM_PROCS))

# ----------------------------
# RETRIEVE OUTPUT
# ----------------------------
cl.enqueue_copy(queue, console, console_buf)
queue.finish()

# print non-zero console output as ASCII
output = "".join(chr(c & 0xFF) for c in console if c != 0)
print("HDGL Monolithic Console Output:")
print(output)
