"""add accounts, subscriptions, plan_limits, and account_invites tables

Revision ID: 016
Revises: 015
Create Date: 2026-02-07

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID, JSONB


# revision identifiers, used by Alembic.
revision: str = '016'
down_revision: Union[str, None] = '015'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # 1. accounts table
    op.create_table(
        'accounts',
        sa.Column('id', UUID(as_uuid=True), server_default=sa.text('gen_random_uuid()'), nullable=False),
        sa.Column('name', sa.String(255), nullable=False),
        sa.Column('display_code', sa.String(8), nullable=False),
        sa.Column('owner_id', UUID(as_uuid=True), nullable=True),  # nullable until user created
        sa.Column('stripe_customer_id', sa.String(255), nullable=True),
        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('NOW()'), nullable=False),
        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.text('NOW()'), nullable=False),
        sa.PrimaryKeyConstraint('id'),
        sa.UniqueConstraint('display_code', name='uq_accounts_display_code'),
    )

    # 2. subscriptions table
    op.create_table(
        'subscriptions',
        sa.Column('id', UUID(as_uuid=True), server_default=sa.text('gen_random_uuid()'), nullable=False),
        sa.Column('account_id', UUID(as_uuid=True), nullable=False),
        sa.Column('stripe_subscription_id', sa.String(255), nullable=True),
        sa.Column('stripe_price_id', sa.String(255), nullable=True),
        sa.Column('plan', sa.String(50), nullable=False, server_default='free'),
        sa.Column('billing_interval', sa.String(20), nullable=True),  # 'monthly' or 'annual'
        sa.Column('status', sa.String(50), nullable=False, server_default='active'),
        sa.Column('seat_limit', sa.Integer, nullable=True),
        sa.Column('current_period_start', sa.DateTime(timezone=True), nullable=True),
        sa.Column('current_period_end', sa.DateTime(timezone=True), nullable=True),
        sa.Column('cancel_at_period_end', sa.Boolean, nullable=False, server_default='false'),
        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('NOW()'), nullable=False),
        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.text('NOW()'), nullable=False),
        sa.PrimaryKeyConstraint('id'),
        sa.ForeignKeyConstraint(['account_id'], ['accounts.id'], ondelete='CASCADE'),
        sa.UniqueConstraint('account_id', name='uq_subscriptions_account_id'),
    )
    op.create_index('ix_subscriptions_account_id', 'subscriptions', ['account_id'])
    op.create_index('ix_subscriptions_plan', 'subscriptions', ['plan'])

    # 3. plan_limits table (configuration — seeded with 3 rows)
    op.create_table(
        'plan_limits',
        sa.Column('plan', sa.String(50), nullable=False),
        sa.Column('max_trees', sa.Integer, nullable=True),           # NULL = unlimited
        sa.Column('max_sessions_per_month', sa.Integer, nullable=True),
        sa.Column('max_users', sa.Integer, nullable=True),
        sa.Column('custom_branding', sa.Boolean, nullable=False, server_default='false'),
        sa.Column('priority_support', sa.Boolean, nullable=False, server_default='false'),
        sa.Column('export_formats', JSONB, nullable=False, server_default='["markdown", "text"]'),
        sa.PrimaryKeyConstraint('plan'),
    )

    # Seed plan_limits
    op.execute("""
        INSERT INTO plan_limits (plan, max_trees, max_sessions_per_month, max_users, custom_branding, priority_support, export_formats)
        VALUES
            ('free', 3, 20, 1, false, false, '["markdown", "text"]'),
            ('pro', 25, 200, 1, false, true, '["markdown", "text", "html", "pdf"]'),
            ('team', NULL, NULL, NULL, true, true, '["markdown", "text", "html", "pdf"]')
    """)

    # 4. account_invites table
    op.create_table(
        'account_invites',
        sa.Column('id', UUID(as_uuid=True), server_default=sa.text('gen_random_uuid()'), nullable=False),
        sa.Column('account_id', UUID(as_uuid=True), nullable=False),
        sa.Column('invited_by_id', UUID(as_uuid=True), nullable=False),
        sa.Column('email', sa.String(255), nullable=False),
        sa.Column('code', sa.String(32), nullable=False),
        sa.Column('role', sa.String(50), nullable=False, server_default='engineer'),
        sa.Column('accepted_by_id', UUID(as_uuid=True), nullable=True),
        sa.Column('expires_at', sa.DateTime(timezone=True), nullable=True),
        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('NOW()'), nullable=False),
        sa.Column('used_at', sa.DateTime(timezone=True), nullable=True),
        sa.PrimaryKeyConstraint('id'),
        sa.ForeignKeyConstraint(['account_id'], ['accounts.id'], ondelete='CASCADE'),
        sa.ForeignKeyConstraint(['invited_by_id'], ['users.id']),
        sa.ForeignKeyConstraint(['accepted_by_id'], ['users.id']),
        sa.UniqueConstraint('code', name='uq_account_invites_code'),
        sa.CheckConstraint("role IN ('engineer', 'viewer')", name='ck_account_invites_role'),
    )
    op.create_index('ix_account_invites_account_id', 'account_invites', ['account_id'])
    op.create_index('ix_account_invites_email', 'account_invites', ['email'])


def downgrade() -> None:
    op.drop_table('account_invites')
    op.drop_table('plan_limits')
    op.drop_table('subscriptions')
    op.drop_table('accounts')