import os

c = get_config()

# Database configuration - use the same PostgreSQL as JupyterHub
p_user = os.environ.get("POSTGRES_USER", "")
p_pass = os.environ.get("POSTGRES_PASSWORD", "")
p_host = os.environ.get("POSTGRES_HOST", "postgres")
p_db = os.environ.get("POSTGRES_DB", "jupyterhub")

# NBgrader database URL
c.NbGrader.db_url = f"postgresql://{p_user}:{p_pass}@{p_host}:5432/{p_db}"

# Course configuration
course_id = os.environ.get("NBGRADER_COURSE_ID", "default_course")
c.CourseDirectory.course_id = course_id
c.CourseDirectory.root = "/srv/nbgrader"

# Exchange directory configuration
exchange_dir = os.environ.get("NBGRADER_EXCHANGE_DIRECTORY", "/srv/nbgrader/exchange")
c.Exchange.root = exchange_dir
c.Exchange.course_id = course_id

# Authentication
c.FormgradeApp.authenticator_plugin_class = "nbgrader.auth.JupyterHubAuthPlugin"

# Logging
c.Application.log_level = "INFO"

# Formgrader settings
c.FormgradeApp.ip = "0.0.0.0"
c.FormgradeApp.port = 9999
c.FormgradeApp.base_url = "/jupyter/services/nbgrader-formgrader/"

# Enable tornado debug mode for development
# c.FormgradeApp.tornado_settings = {'debug': True}

# Assignment settings
c.AssignmentListApp.assignment_dir = "/home/jovyan/assignments"
c.AssignmentListApp.exchange_directory = exchange_dir

# Grader settings
c.AutogradeApp.force = True
c.GenerateAssignmentApp.force = True