CREATE TABLE lesson_package_types (
  id VARCHAR(64) PRIMARY KEY DEFAULT uuid_generate_v4(),
  name VARCHAR NOT NULL,
  description VARCHAR NOT NULL,
  package_type VARCHAR(64) NOT NULL,
  price NUMERIC(8,2),
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE lesson_package_purchases (
  id VARCHAR(64) PRIMARY KEY DEFAULT uuid_generate_v4(),
  lesson_package_type_id VARCHAR(64) REFERENCES lesson_package_types(id) NOT NULL,
  user_id VARCHAR(64) REFERENCES users(id) NOT NULL,
  teacher_id VARCHAR(64) REFERENCES teachers(id),
  price NUMERIC(8,2),
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE lesson_bookings (
  id VARCHAR(64) PRIMARY KEY DEFAULT uuid_generate_v4(),
  user_id VARCHAR(64) REFERENCES users(id) NOT NULL,
  lesson_type VARCHAR(64) NOT NULL,
  recurring BOOLEAN NOT NULL,
  lesson_length INTEGER NOT NULL,
  payment_style VARCHAR(64) NOT NULL,
  description VARCHAR,
  teacher_id VARCHAR(64) REFERENCES users(id) NOT NULL,
  card_presumed_ok BOOLEAN NOT NULL DEFAULT FALSE,
  sent_notices BOOLEAN NOT NULL DEFAULT FALSE,
  status VARCHAR,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE lesson_sessions (
  id VARCHAR(64) PRIMARY KEY DEFAULT uuid_generate_v4(),
  music_session_id VARCHAR(64) REFERENCES music_sessions(id) NOT NULL,
  lesson_type VARCHAR(64) NOT NULL,
  teacher_id VARCHAR(64) REFERENCES users(id) NOT NULL,
  lesson_package_purchase_id VARCHAR(64) REFERENCES lesson_package_purchases(id),
  lesson_booking_id VARCHAR(64) REFERENCES lesson_bookings(id),
  duration INTEGER NOT NULL,
  price NUMERIC(8,2) NOT NULL,
  teacher_complete BOOLEAN DEFAULT FALSE NOT NULL,
  student_complete BOOLEAN DEFAULT FALSE NOT NULL,
  student_canceled BOOLEAN DEFAULT FALSE NOT NULL,
  teacher_canceled BOOLEAN DEFAULT FALSE NOT NULL,
  student_canceled_at TIMESTAMP,
  teacher_canceled_at TIMESTAMP,
  student_canceled_reason VARCHAR,
  teacher_canceled_reason VARCHAR,
  status VARCHAR,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

ALTER TABLE notifications ADD COLUMN lesson_session_id VARCHAR(64) REFERENCES lesson_sessions(id);

INSERT INTO lesson_package_types (id, name, description, package_type, price) VALUES ('single', 'Single Lesson', 'A single lesson purchased at the teacher''s price.', 'single', 0.00);
INSERT INTO lesson_package_types (id, name, description, package_type, price) VALUES ('single-free', 'Free Lesson', 'A free, single lesson.', 'single-free', 0.00);
INSERT INTO lesson_package_types (id, name, description, package_type, price) VALUES ('test-drive', 'Test Drive', 'Four reduced-price lessons which you can use to find that ideal teacher.', 'test-drive', 49.99);


CREATE TABLE lesson_booking_slots (
  id VARCHAR(64) PRIMARY KEY DEFAULT uuid_generate_v4(),
  lesson_booking_id VARCHAR(64) REFERENCES lesson_bookings(id) NOT NULL,
  slot_type VARCHAR(64) NOT NULL,
  preferred_day DATE,
  day_of_week INTEGER,
  hour INTEGER,
  minute INTEGER,
  timezone VARCHAR NOT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

ALTER TABLE lesson_bookings ADD COLUMN default_slot VARCHAR(64) REFERENCES lesson_booking_slots(id);
ALTER TABLE lesson_sessions ADD COLUMN slot VARCHAR(64) REFERENCES lesson_booking_slots(id);

ALTER TABLE chat_messages ADD COLUMN target_user_id VARCHAR(64) REFERENCES users(id);
ALTER TABLE chat_messages ADD COLUMN lesson_booking_id VARCHAR(64) REFERENCES lesson_bookings(id);
ALTER TABLE users ADD COLUMN remaining_free_lessons INTEGER NOT NULL DEFAULT 1;
ALTER TABLE users ADD COLUMN stored_credit_card BOOLEAN NOT NULL DEFAULT FALSE;
ALTER TABLE users ADD COLUMN remaining_test_drives INTEGER NOT NULL DEFAULT 0;
ALTER TABLE users ADD COLUMN stripe_token VARCHAR(200);
ALTER TABLE users ADD COLUMN stripe_customer_id VARCHAR(200);
ALTER TABLE users ADD COLUMN stripe_zip_code VARCHAR(200);
ALTER TABLE sales ADD COLUMN stripe_charge_id VARCHAR(200);