-- Baseline legacy tables and normalize their timestamps as UTC.
CREATE TABLE IF NOT EXISTS users (
    id UUID PRIMARY KEY,
    username VARCHAR(255) UNIQUE NOT NULL,
    password_hashed BYTEA NOT NULL,
    timezone VARCHAR(64) NOT NULL DEFAULT 'UTC',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

ALTER TABLE users
    ADD COLUMN IF NOT EXISTS timezone VARCHAR(64) NOT NULL DEFAULT 'UTC';

CREATE TABLE IF NOT EXISTS notifications (
    id UUID PRIMARY KEY,
    user_uuid UUID REFERENCES users(id) ON DELETE CASCADE UNIQUE,
    discord_webhook VARCHAR(500),
    discord_enabled BOOLEAN DEFAULT FALSE,
    ntfy_topic VARCHAR(255),
    ntfy_enabled BOOLEAN DEFAULT FALSE,
    last_message_sent TIMESTAMPTZ,
    current_notification_status VARCHAR(50) DEFAULT 'inactive',
    created_at TIMESTAMPTZ DEFAULT NOW(),
    updated_at TIMESTAMPTZ DEFAULT NOW()
);

DO $$
BEGIN
    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public'
          AND table_name = 'users'
          AND column_name = 'created_at'
          AND data_type = 'timestamp without time zone'
    ) THEN
        ALTER TABLE users ALTER COLUMN created_at TYPE TIMESTAMPTZ
            USING created_at AT TIME ZONE 'UTC';
    END IF;

    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public'
          AND table_name = 'notifications'
          AND column_name = 'last_message_sent'
          AND data_type = 'timestamp without time zone'
    ) THEN
        ALTER TABLE notifications ALTER COLUMN last_message_sent TYPE TIMESTAMPTZ
            USING last_message_sent AT TIME ZONE 'UTC';
    END IF;

    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public'
          AND table_name = 'notifications'
          AND column_name = 'created_at'
          AND data_type = 'timestamp without time zone'
    ) THEN
        ALTER TABLE notifications ALTER COLUMN created_at TYPE TIMESTAMPTZ
            USING created_at AT TIME ZONE 'UTC';
    END IF;

    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = 'public'
          AND table_name = 'notifications'
          AND column_name = 'updated_at'
          AND data_type = 'timestamp without time zone'
    ) THEN
        ALTER TABLE notifications ALTER COLUMN updated_at TYPE TIMESTAMPTZ
            USING updated_at AT TIME ZONE 'UTC';
    END IF;
END $$;