#!/usr/bin/env python3
"""Pre-build: generate src/version.h from version.txt so the firmware
   uses the single source of truth for version numbers."""
Import("env")
import os

project_dir = env.subst("$PROJECT_DIR")
ver_file = os.path.join(project_dir, "version.txt")
out_file = os.path.join(project_dir, "src", "version.h")

versions = {}
with open(ver_file) as f:
    for line in f:
        line = line.strip()
        if "=" in line:
            k, v = line.split("=", 1)
            versions[k.strip()] = v.strip()

header = f"""// Auto-generated from version.txt — DO NOT EDIT
#define FIRMWARE_VERSION_SERVER "{versions['server']}"
#define FIRMWARE_VERSION_CLIENT "{versions['client']}"
"""

with open(out_file, "w") as f:
    f.write(header)

print(f"  versions: server={versions['server']}  client={versions['client']}  ->  src/version.h")