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#!/usr/bin/env -S python3 -u
# Note that running python with the `-u` flag is required on Windows,
# in order to ensure that stdin and stdout are opened in binary, rather
# than text, mode.

import sys
import json
import struct
import os
from platform import system as platform

repo_map = { "gitlab.otters.xyz": "~/git/Cabify" }

# Read a message from stdin and decode it.
def getMessage():
    rawLength = sys.stdin.buffer.read(4)
    if len(rawLength) == 0:
        sys.exit(0)
    messageLength = struct.unpack('@I', rawLength)[0]
    message = sys.stdin.buffer.read(messageLength).decode('utf-8')
    return json.loads(message)

# Encode a message for transmission,
# given its content.
def encodeMessage(messageContent):
    # https://docs.python.org/3/library/json.html#basic-usage
    # To get the most compact JSON representation, you should specify
    # (',', ':') to eliminate whitespace.
    # We want the most compact representation because the browser rejects # messages that exceed 1 MB.
    encodedContent = json.dumps(messageContent, separators=(',', ':')).encode('utf-8')
    encodedLength = struct.pack('@I', len(encodedContent))
    return {'length': encodedLength, 'content': encodedContent}

# Send an encoded message to stdout
def sendMessage(encodedMessage):
    sys.stdout.buffer.write(encodedMessage['length'])
    sys.stdout.buffer.write(encodedMessage['content'])
    sys.stdout.buffer.flush()

while True:
    receivedMessage = getMessage()
    if repo_map.get(receivedMessage["host"]):
        path_prefix = os.path.expanduser(repo_map[receivedMessage["host"]])
        path = os.path.join(path_prefix, receivedMessage["repo"])
        if not os.path.exists(path):
            sendMessage(encodeMessage(json.dumps({"error": "repo not found"})))

        # tmux new-window -t 0 -n "$repo_path" "cd ~/git/Cabify/$repo_path && nvim ."
        os.system("/opt/homebrew/bin/tmux new-window -t 0 -n \"{}\" \"cd {} && nvim .\"".format(receivedMessage["repo"], path))
        os.system("/usr/bin/osascript -e 'activate application \"Alacritty\"'")
        sendMessage(encodeMessage(json.dumps(receivedMessage)))
    else:
        sendMessage(encodeMessage(json.dumps({"error": "host not found in map"})))