-- Migration: Add new columns and tables for Aletheia v0.2
-- Safe: uses IF NOT EXISTS / ADD COLUMN IF NOT EXISTS (PostgreSQL 11+)

-- User profile fields
ALTER TABLE users ADD COLUMN IF NOT EXISTS allergies TEXT DEFAULT '[]';
ALTER TABLE users ADD COLUMN IF NOT EXISTS health_profile VARCHAR DEFAULT 'normal';

-- Achievements table
CREATE TABLE IF NOT EXISTS achievements (
    id SERIAL PRIMARY KEY,
    code VARCHAR UNIQUE NOT NULL,
    name VARCHAR NOT NULL,
    description VARCHAR NOT NULL,
    emoji VARCHAR DEFAULT '🏆',
    target INTEGER DEFAULT 1
);

-- User achievements
CREATE TABLE IF NOT EXISTS user_achievements (
    id SERIAL PRIMARY KEY,
    user_id INTEGER REFERENCES users(id) NOT NULL,
    achievement_id INTEGER REFERENCES achievements(id) NOT NULL,
    unlocked_at TIMESTAMPTZ DEFAULT NOW()
);

-- Shopping list
CREATE TABLE IF NOT EXISTS shopping_list (
    id SERIAL PRIMARY KEY,
    user_id INTEGER REFERENCES users(id) NOT NULL,
    product_name VARCHAR NOT NULL,
    barcode VARCHAR,
    checked BOOLEAN DEFAULT FALSE,
    added_at TIMESTAMPTZ DEFAULT NOW()
);

-- Indexes
CREATE INDEX IF NOT EXISTS idx_user_achievements_user ON user_achievements(user_id);
CREATE INDEX IF NOT EXISTS idx_shopping_list_user ON shopping_list(user_id);
CREATE INDEX IF NOT EXISTS idx_scans_user_date ON scans(user_id, scanned_at);