-- Bestehende Datenbanken nachziehen (wird auch beim App-Start ausgeführt).

CREATE TABLE IF NOT EXISTS users (
    id SERIAL PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    email VARCHAR(255) NOT NULL UNIQUE,
    password_hash TEXT NOT NULL,
    display_name VARCHAR(100),
    is_admin BOOLEAN NOT NULL DEFAULT FALSE,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

ALTER TABLE users
ADD COLUMN IF NOT EXISTS is_admin BOOLEAN NOT NULL DEFAULT FALSE;

CREATE TABLE IF NOT EXISTS registration_invites (
    id SERIAL PRIMARY KEY,
    token_hash TEXT NOT NULL UNIQUE,
    expires_at TIMESTAMP,
    used_by INTEGER REFERENCES users(id),
    used_at TIMESTAMP,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS sessions (
    id SERIAL PRIMARY KEY,
    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    token_hash TEXT NOT NULL UNIQUE,
    expires_at TIMESTAMP NOT NULL,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

ALTER TABLE concerts
ADD COLUMN IF NOT EXISTS created_by INTEGER REFERENCES users(id) ON DELETE SET NULL;

CREATE TABLE IF NOT EXISTS concert_comments (
    id SERIAL PRIMARY KEY,
    concert_id INTEGER NOT NULL REFERENCES concerts(id) ON DELETE CASCADE,
    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    body TEXT NOT NULL,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS concert_photos (
    id SERIAL PRIMARY KEY,
    concert_id INTEGER NOT NULL REFERENCES concerts(id) ON DELETE CASCADE,
    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    path TEXT NOT NULL,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS concert_attendance (
    concert_id INTEGER NOT NULL REFERENCES concerts(id) ON DELETE CASCADE,
    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    status VARCHAR(20) NOT NULL CHECK (
        status IN ('attending', 'maybe', 'ticket_search')
    ),
    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (concert_id, user_id)
);

CREATE INDEX IF NOT EXISTS idx_concert_attendance_concert
    ON concert_attendance(concert_id, status);