"""
Rename a captured screen: its id, its image files and its references in the app map.

Auto-generated ids (scr_*) are placeholders. Giving them meaningful names keeps the
map readable, and any hotspot pointing at the old id is repointed so no link breaks.

    py tools/rename_screen.py scr_x_1 payments_auto --name "Мой автоплатеж" --category Финансы
"""

import argparse
import json
import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent))

import telecom_cdp as T


def rename(old_id, new_id, name=None, category=None):
    T.validate_screen_id(old_id)
    T.validate_screen_id(new_id)

    app_map = T.load_app_map()
    screen = next((s for s in app_map.get("screens", []) if s["id"] == old_id), None)
    if screen is None:
        raise ValueError("No screen with id " + old_id)
    if any(s["id"] == new_id for s in app_map["screens"]):
        raise ValueError("A screen named " + new_id + " already exists")

    for suffix in ("_long.png", ".png", "_result.json"):
        src = T.SCREENS_DIR / (old_id + suffix)
        if src.exists():
            src.replace(T.SCREENS_DIR / (new_id + suffix))

    screen["id"] = new_id
    screen["image"] = screen["image"].replace(old_id, new_id)
    if name:
        screen["name"] = name
    if category:
        screen["category"] = category

    repointed = 0
    for other in app_map["screens"]:
        for hs in other.get("hotspots", []):
            if hs.get("targetScreenId") == old_id:
                hs["targetScreenId"] = new_id
                repointed += 1

    T.save_app_map(app_map)

    result_path = T.SCREENS_DIR / (new_id + "_result.json")
    if result_path.exists():
        try:
            data = json.loads(result_path.read_text(encoding="utf-8"))
            data["screenId"] = new_id
            data["imageUrl"] = data.get("imageUrl", "").replace(old_id, new_id)
            if isinstance(data.get("screen"), dict):
                data["screen"]["id"] = new_id
                data["screen"]["image"] = data["screen"].get("image", "").replace(old_id, new_id)
            result_path.write_text(
                json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8"
            )
        except Exception as exc:
            print("warning: could not rewrite result JSON: " + str(exc))

    print(old_id + " -> " + new_id + "  (links repointed: " + str(repointed) + ")")


def main():
    parser = argparse.ArgumentParser(description="Rename a captured screen.")
    parser.add_argument("old_id")
    parser.add_argument("new_id")
    parser.add_argument("--name", default=None)
    parser.add_argument("--category", default=None)
    args = parser.parse_args()
    try:
        rename(args.old_id, args.new_id, args.name, args.category)
    except ValueError as exc:
        print("Error: " + str(exc))
        return 1
    return 0


if __name__ == "__main__":
    sys.exit(main())