from logging.config import fileConfig

from sqlalchemy import engine_from_config
from sqlalchemy import pool

from alembic import context

# Import our models and database
from app.config import settings
from app.database import Base
# Import all models so Alembic can detect them for autogenerate
from app.models import (  # noqa: F401
    Application, AdminUser, Payment, AuditLog, NINVerification, BizVerification, Waitlist, User,
    Programme, Course, Enrollment, AcademicSession, AttendanceSession, AttendanceRecord, Assessment,
    StudentLedger, DeviceLoan, DeviceLoanPayment,
    SupportTicket,
    CorporatePartner, PartnerOpportunity, OpportunityApplication, PartnerEnrollment, EducationalPartner, PartnerCohort, DiscoverySession,
    Mentor, MentorMentee, MentorshipSession,
    Document
)

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Set the database URL from settings
config.set_main_option("sqlalchemy.url", settings.database_url)

# Interpret the config file for Python logging.
# This line sets up loggers basically.
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
target_metadata = Base.metadata

# other values from the config, defined by the needs of env.py,
# can be acquired:
# my_important_option = config.get_main_option("my_important_option")
# ... etc.


def run_migrations_offline() -> None:
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )

    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """
    connectable = engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        context.configure(
            connection=connection, target_metadata=target_metadata
        )

        with context.begin_transaction():
            context.run_migrations()


if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()