-- Migration 027: Customer Notes Table
-- Add table for storing internal notes about customers
-- Including subscription comments and other note types

CREATE TABLE IF NOT EXISTS customer_notes (
    id SERIAL PRIMARY KEY,
    customer_id INTEGER NOT NULL REFERENCES customers(id) ON DELETE CASCADE,
    note_type VARCHAR(50) NOT NULL,  -- 'subscription_comment', 'general', 'support', etc.
    note TEXT NOT NULL,
    created_by VARCHAR(100),
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

-- Create index for efficient queries
CREATE INDEX IF NOT EXISTS idx_customer_notes_customer_id ON customer_notes(customer_id);
CREATE INDEX IF NOT EXISTS idx_customer_notes_type ON customer_notes(note_type);