#!/usr/bin/env python3
import argparse
import io
import json
from pathlib import Path

import pyjson5

REPO_DIR = Path(__file__).parent.parent
BIN_DIR = REPO_DIR / "bin"
SRC_DIR = REPO_DIR / "src"
CONFIG_DIR = BIN_DIR / "cfg"
GAMEFLOW_PATH = CONFIG_DIR / "Tomb1Main_gameflow.json5"


BODY_PREFIX = """
#include "game/gameflow.h"
#include "global/types.h"

#include <stddef.h>

const char *g_T1MVersion = "{version}";

GAMEFLOW_DEFAULT_STRING g_GameFlowDefaultStrings[] = {{"""

BODY_SUFFIX = """    { 0, NULL },
};
"""


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    parser.add_argument("--version-file", type=Path)
    parser.add_argument('-o', "--output", type=Path)
    return parser.parse_args()


def get_init_c(version: str) -> str:
    gameflow = pyjson5.loads(GAMEFLOW_PATH.read_text(encoding="utf-8"))
    with io.StringIO() as handle:
        print(BODY_PREFIX.format(version=version).lstrip(), file=handle)
        for key, value in gameflow["strings"].items():
            print(f"    {{ GS_{key}, {json.dumps(value)} }},", file=handle)
        print(BODY_SUFFIX.rstrip(), file=handle)
        return handle.getvalue()


def update_init_c(output_path: Path, version: str) -> None:
    new_text = get_init_c(version=version)
    if not output_path.exists() or output_path.read_text() != new_text:
        output_path.write_text(new_text)


def main() -> None:
    args = parse_args()
    if args.version_file and args.version_file.exists():
        version = args.version_file.read_text().strip()
    else:
        version = ""
    update_init_c(output_path=args.output, version=version)


if __name__ == "__main__":
    main()