package database

// ParentMigrations creates the four parent-side tables for Phase 9c:
//
//	parent_account     — one row per invited parent (email, language)
//	parent_child       — kids linked to a parent and a tt_class
//	parent_magic_link  — one-shot invite tokens, hashed
//	parent_session     — active browser sessions after redeeming a link
//
// The teacher owns the invite (created_by_user_id on account); parent sees
// only data scoped to their own children's class via tt_class.id.
func ParentMigrations() []string {
	return []string{
		`CREATE TABLE IF NOT EXISTS parent_account (
			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
			created_by_user_id UUID NOT NULL,
			email VARCHAR(255) NOT NULL,
			preferred_language VARCHAR(8) DEFAULT 'de',
			created_at TIMESTAMPTZ DEFAULT NOW(),
			UNIQUE(created_by_user_id, email)
		)`,

		`CREATE TABLE IF NOT EXISTS parent_child (
			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
			parent_id UUID NOT NULL REFERENCES parent_account(id) ON DELETE CASCADE,
			tt_class_id UUID NOT NULL REFERENCES tt_class(id) ON DELETE CASCADE,
			first_name VARCHAR(100) NOT NULL,
			last_name VARCHAR(100) NOT NULL,
			created_at TIMESTAMPTZ DEFAULT NOW()
		)`,

		`CREATE TABLE IF NOT EXISTS parent_magic_link (
			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
			parent_id UUID NOT NULL REFERENCES parent_account(id) ON DELETE CASCADE,
			token_hash VARCHAR(64) NOT NULL UNIQUE,
			expires_at TIMESTAMPTZ NOT NULL,
			used_at TIMESTAMPTZ,
			created_at TIMESTAMPTZ DEFAULT NOW()
		)`,

		`CREATE TABLE IF NOT EXISTS parent_session (
			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
			parent_id UUID NOT NULL REFERENCES parent_account(id) ON DELETE CASCADE,
			token_hash VARCHAR(64) NOT NULL UNIQUE,
			expires_at TIMESTAMPTZ NOT NULL,
			created_at TIMESTAMPTZ DEFAULT NOW()
		)`,

		`CREATE INDEX IF NOT EXISTS idx_parent_account_owner ON parent_account(created_by_user_id)`,
		`CREATE INDEX IF NOT EXISTS idx_parent_child_parent ON parent_child(parent_id)`,
		`CREATE INDEX IF NOT EXISTS idx_parent_child_class ON parent_child(tt_class_id)`,
	}
}