from __future__ import annotations

import os
from pathlib import Path
from urllib.parse import quote_plus

from dotenv import load_dotenv


BASE_DIR = Path(__file__).resolve().parent.parent
DEFAULT_SQLITE_PATH = BASE_DIR / "instance" / "ksp.sqlite3"

load_dotenv(BASE_DIR / ".env")


def _build_database_uri() -> str:
    host = os.getenv("PGHOST")
    port = os.getenv("PGPORT")
    user = os.getenv("PGUSER")
    password = os.getenv("PGPASSWORD")
    database = os.getenv("PGDATABASE")

    if all([host, port, user, password, database]):
        return (
            "postgresql+psycopg://"
            f"{quote_plus(user)}:{quote_plus(password)}@{host}:{port}/{quote_plus(database)}"
        )

    DEFAULT_SQLITE_PATH.parent.mkdir(parents=True, exist_ok=True)
    return f"sqlite:///{DEFAULT_SQLITE_PATH.as_posix()}"


class Config:
    APP_ENV = os.getenv("APP_ENV", "development")
    APP_PORT = int(os.getenv("APP_PORT", "8000"))
    APP_SECRET_KEY = os.getenv("APP_SECRET_KEY", "development-only-secret-key")
    PROJECT_TITLE = os.getenv("PROJECT_TITLE", "KSP Data Hangar")
    WORKBOOK_PATH = os.getenv("WORKBOOK_PATH", "KSP Engine Tweak Chart.xlsx")
    SQLALCHEMY_DATABASE_URI = _build_database_uri()
    SQLALCHEMY_TRACK_MODIFICATIONS = False
    SQLALCHEMY_ECHO = os.getenv("SQLALCHEMY_ECHO", "false").lower() == "true"
    SECRET_KEY = APP_SECRET_KEY