-- Create exercises table for exercise encyclopedia
CREATE TABLE IF NOT EXISTS exercises (
  id SERIAL PRIMARY KEY,
  name VARCHAR(255) NOT NULL UNIQUE,
  description TEXT,
  instructions TEXT,
  muscle_groups TEXT[] DEFAULT ARRAY[]::text[],
  difficulty VARCHAR(20) DEFAULT 'intermediate' CHECK (difficulty IN ('beginner', 'intermediate', 'advanced')),
  equipment_needed TEXT[] DEFAULT ARRAY[]::text[],
  video_url VARCHAR(255),
  created_by VARCHAR(50),
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX idx_exercises_name ON exercises(name);
CREATE INDEX idx_exercises_difficulty ON exercises(difficulty);
CREATE INDEX idx_exercises_muscle_groups ON exercises USING GIN(muscle_groups);