"""Flask CLI commands."""

import click
from flask.cli import with_appcontext


@click.group('db-utils')
def db_cli():
    """Database utility commands."""
    pass


@db_cli.command('create-all')
@with_appcontext
def create_all():
    """Create all database tables."""
    from shopdb.extensions import db

    db.create_all()
    click.echo(click.style("All tables created.", fg='green'))


@db_cli.command('drop-all')
@click.confirmation_option(prompt='This will delete ALL data. Are you sure?')
@with_appcontext
def drop_all():
    """Drop all database tables."""
    from shopdb.extensions import db

    db.drop_all()
    click.echo(click.style("All tables dropped.", fg='yellow'))


@click.group('seed')
def seed_cli():
    """Database seeding commands."""
    pass


@seed_cli.command('reference-data')
@with_appcontext
def seed_reference_data():
    """Seed reference data (machine types, statuses, etc.)."""
    from shopdb.extensions import db
    from shopdb.core.models import MachineType, OperatingSystem, AssetStatus, LocationType
    from shopdb.core.models.relationship import RelationshipType

    # Machine types
    machine_types = [
        {'machinetype': 'CNC Mill', 'category': 'Equipment', 'description': 'CNC Milling Machine'},
        {'machinetype': 'CNC Lathe', 'category': 'Equipment', 'description': 'CNC Lathe'},
        {'machinetype': 'CMM', 'category': 'Equipment', 'description': 'Coordinate Measuring Machine'},
        {'machinetype': 'EDM', 'category': 'Equipment', 'description': 'Electrical Discharge Machine'},
        {'machinetype': 'Grinder', 'category': 'Equipment', 'description': 'Grinding Machine'},
        {'machinetype': 'Inspection Station', 'category': 'Equipment', 'description': 'Inspection Station'},
        {'machinetype': 'Desktop PC', 'category': 'PC', 'description': 'Desktop Computer'},
        {'machinetype': 'Laptop', 'category': 'PC', 'description': 'Laptop Computer'},
        {'machinetype': 'Shopfloor PC', 'category': 'PC', 'description': 'Shopfloor Computer'},
        {'machinetype': 'Server', 'category': 'Network', 'description': 'Server'},
        {'machinetype': 'Switch', 'category': 'Network', 'description': 'Network Switch'},
        {'machinetype': 'Access Point', 'category': 'Network', 'description': 'Wireless Access Point'},
    ]

    for mt_data in machine_types:
        existing = MachineType.query.filter_by(machinetype=mt_data['machinetype']).first()
        if not existing:
            mt = MachineType(**mt_data)
            db.session.add(mt)

    # Asset statuses (canonical set - the asset model is the contract)
    asset_statuses = [
        {'status': 'In Use', 'description': 'Currently in use', 'color': '#28a745'},
        {'status': 'Inventory', 'description': 'In inventory', 'color': '#17a2b8'},
        {'status': 'In Repair', 'description': 'Being repaired', 'color': '#ffc107'},
        {'status': 'Retired', 'description': 'No longer in use', 'color': '#6c757d'},
        {'status': 'Returned', 'description': 'Returned to vendor or owner', 'color': '#fd7e14'},
        {'status': 'Warrantied', 'description': 'Under warranty service', 'color': '#20c997'},
        {'status': 'Lost', 'description': 'Lost or missing', 'color': '#dc3545'},
    ]

    for s_data in asset_statuses:
        existing = AssetStatus.query.filter_by(status=s_data['status']).first()
        if not existing:
            db.session.add(AssetStatus(isactive=True, **s_data))
        elif existing.isactive is not True:
            existing.isactive = True

    # Location types (ADR-001)
    location_types = ['section', 'cell', 'subcell', 'operation', 'meetingroom',
                      'lab', 'office', 'storage', 'hallway', 'networkcloset',
                      'building']
    for lt in location_types:
        if not LocationType.query.filter_by(locationtype=lt).first():
            db.session.add(LocationType(locationtype=lt, isactive=True))

    # Operating systems
    os_list = [
        {'osname': 'Windows 10', 'osversion': '10.0'},
        {'osname': 'Windows 11', 'osversion': '11.0'},
        {'osname': 'Windows Server 2019', 'osversion': '2019'},
        {'osname': 'Windows Server 2022', 'osversion': '2022'},
        {'osname': 'Linux', 'osversion': 'Various'},
    ]

    for os_data in os_list:
        existing = OperatingSystem.query.filter_by(osname=os_data['osname']).first()
        if not existing:
            os_obj = OperatingSystem(**os_data)
            db.session.add(os_obj)

    # Connection types (pre-1.0 legacy; kept for backward compat with
    # existing relationship rows. New ADR-001 code reasons about the three
    # canonical types below via free-text label.)
    connection_types = [
        {'relationshiptype': 'Serial Cable', 'description': 'RS-232 or similar serial connection'},
        {'relationshiptype': 'Direct Ethernet', 'description': 'Direct network cable (airgapped)'},
        {'relationshiptype': 'USB', 'description': 'USB connection'},
        {'relationshiptype': 'WiFi', 'description': 'Wireless network connection'},
        {'relationshiptype': 'Dualpath', 'description': 'Redundant/failover network path'},
    ]

    for ct_data in connection_types:
        existing = RelationshipType.query.filter_by(relationshiptype=ct_data['relationshiptype']).first()
        if not existing:
            ct = RelationshipType(**ct_data)
            db.session.add(ct)

    # ADR-001 canonical relationship types. Created first without propagation
    # FKs, then patched with propagatesthroughid since `controls` points at
    # `partof` (same table). All three are idempotent.
    #
    # MySQL collation is case-insensitive by default, which would let a
    # legacy capitalized row (e.g. "Controls") match the lowercase
    # "controls" check and skip the insert. Force binary comparison via
    # collate so the three ADR-001 types stay distinct from any legacy
    # rows with the same spelling but different case.
    from sqlalchemy import func, literal
    def _lookup_binary(name):
        dialect = db.engine.dialect.name
        if dialect == 'mysql':
            return RelationshipType.query.filter(
                func.binary(RelationshipType.relationshiptype) == literal(name)
            ).first()
        return RelationshipType.query.filter_by(relationshiptype=name).first()

    adr_types = [
        {'relationshiptype': 'partof', 'description': 'Composition / sub-assembly (ADR-001)'},
        {'relationshiptype': 'controls', 'description': 'Operational authority over another asset (ADR-001)'},
        {'relationshiptype': 'connectedto', 'description': 'Network or data link without authority (ADR-001)'},
    ]
    for at in adr_types:
        if not _lookup_binary(at['relationshiptype']):
            db.session.add(RelationshipType(**at))
    db.session.flush()

    # Wire `controls` -> `partof` propagation rail. partof + connectedto stay
    # null (no propagation).
    partof = _lookup_binary('partof')
    controls = _lookup_binary('controls')
    if partof and controls and controls.propagatesthroughid != partof.relationshiptypeid:
        controls.propagatesthroughid = partof.relationshiptypeid

    # Default-printer link: a PC asset -> its default printer asset. Read by the
    # printer-installer endpoint (parity with classic apipcdefaultprinter.asp).
    # Attribute-style edge, not a position rail, so no propagation.
    if not _lookup_binary('defaultprinter'):
        db.session.add(RelationshipType(
            relationshiptype='defaultprinter',
            description='PC to its default printer (installer preselect, ADR-001)'
        ))

    db.session.commit()
    click.echo(click.style("Reference data seeded.", fg='green'))


@seed_cli.command('test-user')
@with_appcontext
def seed_test_user():
    """Create a test admin user."""
    from shopdb.extensions import db
    from shopdb.core.models import User, Role
    from werkzeug.security import generate_password_hash

    # Create admin role if not exists
    admin_role = Role.query.filter_by(rolename='admin').first()
    if not admin_role:
        admin_role = Role(rolename='admin', description='Administrator')
        db.session.add(admin_role)

    # Create test user
    test_user = User.query.filter_by(username='admin').first()
    if not test_user:
        test_user = User(
            username='admin',
            email='admin@localhost',
            passwordhash=generate_password_hash('admin123'),
            isactive=True
        )
        test_user.roles.append(admin_role)
        db.session.add(test_user)
        db.session.commit()
        click.echo(click.style("Test user created: admin / admin123", fg='green'))
    else:
        click.echo(click.style("Test user already exists", fg='yellow'))


@seed_cli.command('permissions')
@with_appcontext
def seed_permissions():
    """Seed predefined permissions."""
    from shopdb.extensions import db
    from shopdb.core.models import Permission

    created = Permission.seed()
    db.session.commit()
    click.echo(click.style(f"{created} permissions created.", fg='green'))


@seed_cli.command('settings')
@with_appcontext
def seed_settings():
    """Seed default system settings."""
    from shopdb.extensions import db
    from shopdb.core.models import Setting
    from shopdb.core.api.settings import build_default_settings

    defaults = build_default_settings()

    created = 0
    for d in defaults:
        if not Setting.query.filter_by(key=d['key']).first():
            setting = Setting(**d)
            db.session.add(setting)
            created += 1

    db.session.commit()
    click.echo(click.style(f"{created} default settings created.", fg='green'))
