-- Add auth_provider column to users table
-- This tracks whether the user is local or uses OAuth (google, microsoft, etc.)

-- Add the column if it doesn't exist
DO $$ 
BEGIN 
    IF NOT EXISTS (
        SELECT 1 
        FROM information_schema.columns 
        WHERE table_name='users' AND column_name='auth_provider'
    ) THEN
        ALTER TABLE users ADD COLUMN auth_provider VARCHAR(50) DEFAULT 'local' NOT NULL;
    END IF;
END $$;

-- Update existing users to have 'local' as their auth_provider
UPDATE users SET auth_provider = 'local' WHERE auth_provider IS NULL;

-- Create index for faster lookups
CREATE INDEX IF NOT EXISTS idx_users_auth_provider ON users(auth_provider);

-- Display the updated users table structure
SELECT 
    column_name, 
    data_type, 
    is_nullable, 
    column_default 
FROM information_schema.columns 
WHERE table_name = 'users' 
ORDER BY ordinal_position;