-- Create AI Insights table for caching AI-generated insights
CREATE TABLE IF NOT EXISTS ai_insights (
    id SERIAL PRIMARY KEY,
    cycle_id VARCHAR(255) NOT NULL,
    kandang_id VARCHAR(255), -- NULL means "all kandangs"
    insight_text TEXT NOT NULL,
    version VARCHAR(50) NOT NULL DEFAULT 'v1',
    generated_at TIMESTAMP NOT NULL DEFAULT NOW(),
    expires_at TIMESTAMP NOT NULL,
    created_at TIMESTAMP NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMP NOT NULL DEFAULT NOW()
);

-- Create indexes for faster lookups
CREATE INDEX IF NOT EXISTS idx_ai_insights_cycle_kandang ON ai_insights (cycle_id, kandang_id);
CREATE INDEX IF NOT EXISTS idx_ai_insights_expires_at ON ai_insights (expires_at);

-- Add comment to table
COMMENT ON TABLE ai_insights IS 'Stores AI-generated insights with 6-hour TTL for cross-device caching';