package user

import (
	"context"
	"fmt"

	"github.com/jackc/pgx/v5/pgxpool"
)

// SuperadminStore verwaltet mandantenuebergreifende Superadmin-Konten in der
// Control-Plane-Registry (siehe internal/tenant.Registry). Superadmin-ohne-
// Tenant ist dadurch ein eigener Typ statt eines Sonderfalls von User/
// TenantUserStore — es gibt keinen Tenant-Parameter, den man weglassen
// koennte (IAM-01, "ohne Sonderbehandlung im Code").
type SuperadminStore struct {
	pool *pgxpool.Pool
}

func NewSuperadminStore(pool *pgxpool.Pool) *SuperadminStore {
	return &SuperadminStore{pool: pool}
}

func (s *SuperadminStore) Create(ctx context.Context, email, name string) (User, error) {
	if err := ValidateEmail(email); err != nil {
		return User{}, err
	}

	var u User
	u.Email, u.Name, u.Status = email, name, StatusActive

	row := s.pool.QueryRow(ctx, `
		INSERT INTO superadmins (email, name, status)
		VALUES ($1, $2, $3)
		RETURNING id, created_at, updated_at
	`, u.Email, u.Name, u.Status)

	if err := row.Scan(&u.ID, &u.CreatedAt, &u.UpdatedAt); err != nil {
		return User{}, mapWriteErr(err)
	}
	return u, nil
}

func (s *SuperadminStore) Get(ctx context.Context, id string) (User, error) {
	return scanUser(s.pool.QueryRow(ctx, `
		SELECT id, email, name, status, created_at, updated_at
		FROM superadmins WHERE id = $1
	`, id))
}

func (s *SuperadminStore) List(ctx context.Context) ([]User, error) {
	rows, err := s.pool.Query(ctx, `
		SELECT id, email, name, status, created_at, updated_at
		FROM superadmins ORDER BY created_at
	`)
	if err != nil {
		return nil, fmt.Errorf("superadmins auflisten: %w", err)
	}
	defer rows.Close()

	var out []User
	for rows.Next() {
		var u User
		if err := rows.Scan(&u.ID, &u.Email, &u.Name, &u.Status, &u.CreatedAt, &u.UpdatedAt); err != nil {
			return nil, fmt.Errorf("superadmin lesen: %w", err)
		}
		out = append(out, u)
	}
	return out, rows.Err()
}

func (s *SuperadminStore) Deactivate(ctx context.Context, id string) (User, error) {
	return scanUser(s.pool.QueryRow(ctx, `
		UPDATE superadmins SET status = $2, updated_at = now()
		WHERE id = $1
		RETURNING id, email, name, status, created_at, updated_at
	`, id, StatusInactive))
}