#!/usr/bin/python
import hashlib
OUTPUT="keypadOS.lua";
FILES= [
    "updater.lua",
    "config.lua",
    "ui.lua",
    "utils.lua",
    "main.lua",
]

MINIMISE=True

def read_file(p: str) -> str:
    buf = "";
    with open("src/"+p, "r", encoding="utf-8") as f:
        buf += f"rawset(__BUNDLER_FILES, \"{p}\", function ()\n";
        for line in f.readlines():
            buf += "    " + line;
        buf += "\nend)";
        if not MINIMISE:
            buf += f"-- FILE END: {p} --\n";
        else:
            buf += "\n";
    return buf;

def minimise(buf: str) -> str:
    newbuf = "";
    for line in buf.splitlines():
        if line.strip().startswith("--"):
            continue;
        if line.strip() == "":
            continue
        newbuf += line + "\n";
    return newbuf;

def get_hash(buf: str) -> str:
    hasher = hashlib.sha1();

    hasher.update(bytes(buf, "utf-8"));
    return hasher.hexdigest();

def main():
    buf = ""
    buf += "local __BUNDLER_FILES = {}\n";
    buf += "local __DEFAULT_IMPORT = require\n";
    buf += "local require = function(path)\n";
    buf += "    if __BUNDLER_FILES[path] then\n";
    buf += "        return __BUNDLER_FILES[path]()\n";
    buf += "    else\n";
    buf += "        return __DEFAULT_IMPORT(path)\n";
    buf += "    end\n";
    buf += "end\n";

    for file in FILES:
        print(f"=== FILE: {file}");
        buf += read_file(file);

    buf += "require(\"main.lua\").Main()\n";

    if MINIMISE:
        buf = minimise(buf);
    update_hash = get_hash(buf);

    buf = f"local __UPDATE_HASH = \"{update_hash}\"\n" + buf;

    print(f"=== UPDATE HASH: {update_hash}")
    with open(OUTPUT, "w", encoding="utf-8") as f:
        f.write(buf);
    print("DONE");

if __name__ == "__main__":
    main();