"""DocVault Flask application."""

import os

from flask import Flask, jsonify, send_file
from flask_cors import CORS

from server.config import DEBUG, HF_REPO_ID, MAX_CONTENT_LENGTH, SECRET_KEY
from server.routes.api import api_bp
from server.utils.logger import setup_logger


logger = setup_logger(__name__)
ROOT_DIR = os.path.dirname(os.path.dirname(__file__))


def create_app() -> Flask:
    app = Flask(__name__, static_folder=None)
    app.config["SECRET_KEY"] = SECRET_KEY
    app.config["MAX_CONTENT_LENGTH"] = MAX_CONTENT_LENGTH
    app.config["JSON_SORT_KEYS"] = False

    CORS(app, resources={r"/api/*": {"origins": "*"}})
    app.register_blueprint(api_bp)

    @app.after_request
    def add_cache_headers(response):
        if response.content_type and (
            "text/html" in response.content_type
            or "text/javascript" in response.content_type
            or "application/javascript" in response.content_type
            or "text/css" in response.content_type
        ):
            response.cache_control.max_age = 0
            response.cache_control.no_cache = True
            response.cache_control.no_store = True
            response.headers["Pragma"] = "no-cache"
            response.headers["Expires"] = "0"
        return response

    @app.errorhandler(413)
    def request_entity_too_large(error):
        return jsonify(
            {
                "success": False,
                "error": f"File too large. Maximum size: {MAX_CONTENT_LENGTH / (1024 * 1024):.0f}MB",
            }
        ), 413

    @app.route("/<path:filename>")
    def serve_static(filename: str):
        filepath = os.path.join(ROOT_DIR, filename)
        if os.path.exists(filepath) and os.path.isfile(filepath):
            return send_file(filepath)
        return jsonify({"error": "Not found"}), 404

    @app.route("/", methods=["GET"])
    def index():
        index_path = os.path.join(ROOT_DIR, "index.html")
        if os.path.exists(index_path):
            return send_file(index_path)

        return jsonify(
            {
                "name": "DocVault",
                "version": "2.0.0",
                "description": "Hugging Face Hub-backed document storage",
                "storage": "HF",
                "repo": HF_REPO_ID,
                "endpoints": {
                    "GET /api/health": "Health check",
                    "POST /api/create-folder": "Create folder",
                    "POST /api/upload": "Upload file",
                    "POST /api/delete": "Delete file or folder",
                    "POST /api/rename": "Rename file or folder",
                    "GET /api/list": "List contents",
                    "GET /api/download/<file_path>": "Download file",
                },
            }
        ), 200

    logger.info("DocVault application initialized")
    return app


if __name__ == "__main__":
    app = create_app()
    port = int(os.environ.get("PORT", 7860))
    logger.info("Starting DocVault on http://0.0.0.0:%s", port)
    app.run(debug=DEBUG, host="0.0.0.0", port=port)