"""Initial schema — agent_logs table with indexes.

Revision ID: 001
Revises:
Create Date: 2026-03-20
"""

from __future__ import annotations

from alembic import op

revision = "001"
down_revision = None
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.execute("""
        CREATE TABLE IF NOT EXISTS agent_logs (
            id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
            created_at  TIMESTAMPTZ NOT NULL DEFAULT now(),

            -- Source
            agent_id    VARCHAR(64) NOT NULL,
            session_key VARCHAR(256),
            source      VARCHAR(64) NOT NULL DEFAULT 'api',

            -- Classification
            level       VARCHAR(16) NOT NULL DEFAULT 'info',
            category    VARCHAR(64),

            -- Content
            message     TEXT NOT NULL,
            metadata    JSONB DEFAULT '{}',

            -- Correlation
            trace_id    UUID,
            parent_id   UUID REFERENCES agent_logs(id),

            -- Resolution tracking
            resolved    BOOLEAN NOT NULL DEFAULT false,
            resolved_at TIMESTAMPTZ,
            resolved_by VARCHAR(64)
        )
    """)

    op.execute("""
        CREATE INDEX IF NOT EXISTS idx_agent_logs_agent_time
            ON agent_logs (agent_id, created_at DESC)
    """)

    op.execute("""
        CREATE INDEX IF NOT EXISTS idx_agent_logs_level_time
            ON agent_logs (level, created_at DESC)
            WHERE level IN ('warn', 'error', 'critical')
    """)

    op.execute("""
        CREATE INDEX IF NOT EXISTS idx_agent_logs_unresolved
            ON agent_logs (created_at DESC)
            WHERE resolved = false AND level IN ('warn', 'error', 'critical')
    """)

    op.execute("""
        CREATE INDEX IF NOT EXISTS idx_agent_logs_metadata
            ON agent_logs USING GIN (metadata)
    """)

    op.execute("""
        CREATE INDEX IF NOT EXISTS idx_agent_logs_trace
            ON agent_logs (trace_id)
            WHERE trace_id IS NOT NULL
    """)


def downgrade() -> None:
    op.execute("DROP TABLE IF EXISTS agent_logs CASCADE")