#!/usr/bin/env python3
"""Generate config_generated.h from dorknet-quest.cfg.

Bakes the operator's config into the library at compile time. Keys absent from
the cfg are simply not emitted, so the built-in defaults in config.h apply.
Secrets (Photon ids, Meta app id) live only in the git-ignored cfg, never in a
committed file.

Usage: gen_config_header.py <dorknet-quest.cfg> <package> <out/config_generated.h>
"""
import sys
from pathlib import Path

# cfg key -> (macro, kind) where kind is "str", "bool" or "int".
KEYS = {
    "ServerHost": ("DN_SERVER_HOST", "str"),
    "OculusAppId": ("DN_OCULUS_APPID", "str"),
    "PhotonAppId": ("DN_PHOTON_REALTIME", "str"),
    "PhotonVoiceAppId": ("DN_PHOTON_VOICE", "str"),
    "PhotonChatAppId": ("DN_PHOTON_CHAT", "str"),
    "PhotonNameServer": ("DN_PHOTON_SERVER", "str"),
    "PhotonNameServerPort": ("DN_PHOTON_PORT", "int"),
    "PhotonRegion": ("DN_PHOTON_REGION", "str"),
    "EnableTlsTrustBypass": ("DN_TLS_TRUST_BYPASS", "bool"),
    "AcceptUnsignedImages": ("DN_ACCEPT_UNSIGNED_IMAGES", "bool"),
    "AutoCreateAccount": ("DN_AUTO_CREATE_ACCOUNT", "bool"),
    "LogHttp": ("DN_LOG_HTTP", "bool"),
    "Debug": ("DN_DEBUG_HTTP", "bool"),
    "LogHttpBodyMax": ("DN_LOG_BODY_MAX", "int"),
}
TRUE = {"true", "1", "yes", "on"}
FALSE = {"false", "0", "no", "off"}


def c_string(v):
    return '"' + v.replace("\\", "\\\\").replace('"', '\\"') + '"'


def main():
    if len(sys.argv) != 4:
        raise SystemExit("usage: gen_config_header.py <cfg> <package> <out.h>")
    cfg, package, out = Path(sys.argv[1]), sys.argv[2], Path(sys.argv[3])
    lines = ["// Generated by scripts/gen_config_header.py -- do not edit, do not commit.",
             "#ifndef DORKNET_QUEST_CONFIG_GENERATED_H",
             "#define DORKNET_QUEST_CONFIG_GENERATED_H",
             f"#define DN_PACKAGE {c_string(package)}", ""]

    if cfg.exists():
        for raw in cfg.read_text(encoding="utf-8").splitlines():
            line = raw.split("#", 1)[0].strip()
            if not line or "=" not in line or line.startswith("["):
                continue
            key, _, val = line.partition("=")
            key, val = key.strip(), val.strip()
            if key not in KEYS or val == "":
                continue
            macro, kind = KEYS[key]
            if kind == "str":
                lines.append(f"#define {macro} {c_string(val)}")
            elif kind == "int":
                lines.append(f"#define {macro} {int(val)}")
            elif kind == "bool":
                low = val.lower()
                if low in TRUE:
                    lines.append(f"#define {macro} true")
                elif low in FALSE:
                    lines.append(f"#define {macro} false")
                else:
                    raise SystemExit(f"{key}: not a boolean: {val}")
    else:
        print(f"note: {cfg} not found; baking package only, all values default", file=sys.stderr)

    lines += ["", "#endif"]
    out.write_text("\n".join(lines) + "\n", encoding="utf-8")
    print(f"wrote {out}")


if __name__ == "__main__":
    main()