#!/usr/bin/env python3
"""Build the "quiet" Tascam DA-6400 Companion module (1.3.1-quiet) from the stock 1.3.0.

The stock module polls the recorder every 200 ms. The recorder rejects one of those polls
with an "F2 Illegal Status" reply, and the module logs a warning for every reply: about
430,000 warnings a day in Companion's log. This build logs it at most once a minute and
names the commands that were just sent. Nothing else changes.

On NA Ingest the stock module is in
  ~/Library/Application Support/companion/modules/tascam-da-6400-1.3.0

  python3 make_quiet_tascam.py <stock module folder> <output folder>

Writes <output folder>/tascam-da-6400-1.3.1-quiet.tgz. Import it in Companion under
Modules -> Import module package, then pick 1.3.1-quiet on the Tascam connection.
"""
import json
import os
import shutil
import sys
import tarfile
import tempfile

VERSION = "1.3.1-quiet"

PATCHES = [
    # remember the last two commands sent, so the warning can name the rejected one
    ("return this.socket.send(e+c),!0",
     "return this.spSent=[(this.spSent||[]).slice(-1)[0],e].filter(Boolean),this.socket.send(e+c),!0"),
    # log "Illegal Status" at most once a minute, with a count
    ('case n.illegalStatus:this.log("warn",`Illegal Status: Invalid Command ${t.substr(3)}`);break;',
     'case n.illegalStatus:{const q=Date.now();this.spIllegal=(this.spIllegal||0)+1;'
     'if(!this.spIllegalAt||q-this.spIllegalAt>6e4){this.log("warn",`Illegal Status: Invalid Command '
     '${t.substr(3)} (last commands sent: ${(this.spSent||[]).join(", ")}; ${this.spIllegal} rejected '
     'since the last report - reported at most once a minute)`);this.spIllegalAt=q;this.spIllegal=0}}break;'),
]


def build(src, out_dir):
    with tempfile.TemporaryDirectory() as tmp:
        dst = os.path.join(tmp, "tascam-da-6400")
        shutil.copytree(src, dst)
        main = os.path.join(dst, "main.js")
        code = open(main, encoding="utf-8").read()
        for old, new in PATCHES:
            if code.count(old) != 1:
                sys.exit("main.js does not look like the stock 1.3.0 module (patch anchor not found)")
            code = code.replace(old, new)
        open(main, "w", encoding="utf-8").write(code)
        for name in ("companion/manifest.json", "package.json"):
            path = os.path.join(dst, name)
            data = json.load(open(path))
            data["version"] = VERSION
            json.dump(data, open(path, "w"), indent="\t")
        with open(os.path.join(dst, "companion/HELP.md"), "a") as f:
            f.write("\n\n## %s (Waters Church build)\n\nSame as 1.3.0, except the recorder's "
                    "\"Illegal Status\" reply is logged at most once a minute, with the commands "
                    "that were just sent, instead of 5 times a second.\n" % VERSION)
        out = os.path.join(out_dir, "tascam-da-6400-%s.tgz" % VERSION)
        with tarfile.open(out, "w:gz") as tar:
            tar.add(dst, arcname="tascam-da-6400")
    print(out)


if __name__ == "__main__":
    if len(sys.argv) != 3:
        sys.exit(__doc__)
    build(sys.argv[1], sys.argv[2])