import struct

filepath = "/home/prathiyuman/Prathiyuman/ContecMonitor/fiveparaminte-main/scratch/raw_contec_stream.bin"

try:
    with open(filepath, "rb") as f:
        stream = f.read()
except Exception as e:
    print(f"Error: {e}")
    import sys
    sys.exit(1)

packets_288 = []
packets_989 = []
i = 0
while i < len(stream) - 4:
    b0, b1, b2, b3 = stream[i], stream[i+1], stream[i+2], stream[i+3]
    if b3 == 0x46:
        pkt_len = b0 | (b1 << 8)
        if pkt_len == 288 and i + pkt_len <= len(stream):
            packets_288.append(stream[i:i + pkt_len])
        elif pkt_len == 989 and i + pkt_len <= len(stream):
            packets_989.append(stream[i:i + pkt_len])
        i += max(pkt_len, 4)
    else:
        i += 1

print(f"Loaded {len(packets_288)} 288-byte packets and {len(packets_989)} 989-byte packets.")

# Search all offsets in 288-byte packets for any u16 LE value between 70 and 95
print("\nScanning 288-byte packets for u16 LE values in range [75, 95] across all packets:")
found_offsets_288 = {}
for idx, pkt in enumerate(packets_288):
    for off in range(4, len(pkt) - 1, 2):
        val = struct.unpack_from('<H', pkt, off)[0]
        if 75 <= val <= 95:
            found_offsets_288.setdefault(off, []).append((idx, val))

for off, matches in found_offsets_288.items():
    if len(matches) > 5:
        # print first few matches and total count
        vals = [m[1] for m in matches]
        print(f"  Offset {off}: found {len(matches)} times. Values: {set(vals)}")

# Search all offsets in 989-byte packets for any u16 LE value between 70 and 95
print("\nScanning 989-byte packets for u16 LE values in range [75, 95] across all packets:")
found_offsets_989 = {}
for idx, pkt in enumerate(packets_989):
    # ECG packets are mostly waveform data in the first 900 bytes, so let's check from 900 to 988
    for off in range(900, len(pkt) - 1, 2):
        val = struct.unpack_from('<H', pkt, off)[0]
        if 75 <= val <= 95:
            found_offsets_989.setdefault(off, []).append((idx, val))

for off, matches in found_offsets_989.items():
    if len(matches) > 5:
        vals = [m[1] for m in matches]
        print(f"  Offset {off}: found {len(matches)} times. Values: {set(vals)}")