"""Work schedule linkage, absence extensions, overtime balance, CalDAV configs

Revision ID: 0005_extensions
Revises: 0004_ldap
Create Date: 2026-03-27
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

revision = "0005_extensions"
down_revision = "0004_ldap"
branch_labels = None
depends_on = None


def upgrade() -> None:
    # ── 1. AbsenceCategory enum ───────────────────────────────────────────────
    absence_category = postgresql.ENUM(
        "vacation", "sick", "overtime_comp", "training", "business_trip", "other",
        name="absencecategory", create_type=False,
    )
    absence_category.create(op.get_bind(), checkfirst=True)

    # ── 2. absence_types – neue Spalten ───────────────────────────────────────
    op.add_column("absence_types", sa.Column(
        "category",
        sa.Enum("vacation", "sick", "overtime_comp", "training", "business_trip", "other",
                name="absencecategory"),
        nullable=False, server_default="other",
    ))
    op.add_column("absence_types", sa.Column(
        "affects_overtime_balance", sa.Boolean(), nullable=False, server_default="false"
    ))
    op.add_column("absence_types", sa.Column(
        "requires_certificate", sa.Boolean(), nullable=False, server_default="false"
    ))
    op.add_column("absence_types", sa.Column(
        "certificate_after_days", sa.Integer(), nullable=False, server_default="3"
    ))

    # Bestehende Typen klassifizieren
    op.execute("""
        UPDATE absence_types SET category = 'vacation'
        WHERE lower(name) IN ('urlaub', 'sonderurlaub')
    """)
    op.execute("""
        UPDATE absence_types SET category = 'sick', requires_certificate = true
        WHERE lower(name) = 'krankheit'
    """)
    op.execute("""
        UPDATE absence_types SET category = 'business_trip'
        WHERE lower(name) = 'dienstreise'
    """)
    op.execute("""
        UPDATE absence_types SET category = 'training'
        WHERE lower(name) IN ('weiterbildung', 'bildungsurlaub')
    """)

    # ── 3. absences – CalDAV + Meta + Zertifikat ──────────────────────────────
    op.add_column("absences", sa.Column("meta", postgresql.JSONB(), nullable=True))
    op.add_column("absences", sa.Column("certificate_required_by", sa.Date(), nullable=True))
    op.add_column("absences", sa.Column("certificate_received_at", sa.Date(), nullable=True))
    op.add_column("absences", sa.Column("caldav_uid", sa.String(255), nullable=True))
    op.add_column("absences", sa.Column("caldav_user_etag", sa.Text(), nullable=True))
    op.add_column("absences", sa.Column("caldav_company_etag", sa.Text(), nullable=True))
    op.add_column("absences", sa.Column("caldav_last_error", sa.Text(), nullable=True))
    op.add_column("absences", sa.Column(
        "caldav_synced_at", sa.DateTime(timezone=True), nullable=True
    ))

    # ── 4. users – work_schedule_id ───────────────────────────────────────────
    op.add_column("users", sa.Column(
        "work_schedule_id",
        postgresql.UUID(as_uuid=True),
        sa.ForeignKey("work_schedules.id", ondelete="SET NULL"),
        nullable=True,
    ))

    # ── 5. overtime_balances ──────────────────────────────────────────────────
    op.create_table(
        "overtime_balances",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        sa.Column("user_id", postgresql.UUID(as_uuid=True),
                  sa.ForeignKey("users.id", ondelete="CASCADE"),
                  nullable=False, unique=True),
        sa.Column("company_id", postgresql.UUID(as_uuid=True),
                  sa.ForeignKey("companies.id", ondelete="CASCADE"), nullable=False),
        sa.Column("total_hours", sa.Numeric(8, 2), nullable=False, server_default="0"),
        sa.Column("taken_hours", sa.Numeric(8, 2), nullable=False, server_default="0"),
        sa.Column("last_calculated", sa.DateTime(timezone=True), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
    )
    op.create_index("ix_overtime_balances_user_id", "overtime_balances", ["user_id"])
    op.create_index("ix_overtime_balances_company_id", "overtime_balances", ["company_id"])

    # ── 6. caldav_company_configs ─────────────────────────────────────────────
    op.create_table(
        "caldav_company_configs",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        sa.Column("company_id", postgresql.UUID(as_uuid=True),
                  sa.ForeignKey("companies.id", ondelete="CASCADE"),
                  nullable=False, unique=True),
        sa.Column("enabled", sa.Boolean(), nullable=False, server_default="false"),
        sa.Column("principal_url", sa.Text(), nullable=False),
        sa.Column("calendar_url", sa.Text(), nullable=True),
        sa.Column("username", sa.String(255), nullable=False),
        sa.Column("password_encrypted", sa.Text(), nullable=False),
        sa.Column("calendar_display_name", sa.String(255), nullable=False, server_default=""),
        sa.Column("verify_ssl", sa.Boolean(), nullable=False, server_default="true"),
        sa.Column("last_error", sa.Text(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
    )
    op.create_index("ix_caldav_company_configs_company_id", "caldav_company_configs", ["company_id"])

    # ── 7. caldav_user_configs ────────────────────────────────────────────────
    op.create_table(
        "caldav_user_configs",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        sa.Column("user_id", postgresql.UUID(as_uuid=True),
                  sa.ForeignKey("users.id", ondelete="CASCADE"),
                  nullable=False, unique=True),
        sa.Column("enabled", sa.Boolean(), nullable=False, server_default="false"),
        sa.Column("principal_url", sa.Text(), nullable=False),
        sa.Column("calendar_url", sa.Text(), nullable=True),
        sa.Column("username", sa.String(255), nullable=False),
        sa.Column("password_encrypted", sa.Text(), nullable=False),
        sa.Column("calendar_display_name", sa.String(255), nullable=False, server_default=""),
        sa.Column("verify_ssl", sa.Boolean(), nullable=False, server_default="true"),
        sa.Column("last_error", sa.Text(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
    )
    op.create_index("ix_caldav_user_configs_user_id", "caldav_user_configs", ["user_id"])


def downgrade() -> None:
    op.drop_table("caldav_user_configs")
    op.drop_table("caldav_company_configs")
    op.drop_table("overtime_balances")
    op.drop_column("users", "work_schedule_id")
    for col in ["caldav_synced_at", "caldav_last_error", "caldav_company_etag",
                "caldav_user_etag", "caldav_uid", "certificate_received_at",
                "certificate_required_by", "meta"]:
        op.drop_column("absences", col)
    for col in ["certificate_after_days", "requires_certificate",
                "affects_overtime_balance", "category"]:
        op.drop_column("absence_types", col)
    op.execute("DROP TYPE IF EXISTS absencecategory")