package billing

import (
	"context"
	"errors"
	"strings"

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

// SuperAdminPlanName is an internal assignable plan: every dashboard feature ON,
// unlimited SKUs, and the Enterprise-sized credit grant. Not on the public ladder.
const SuperAdminPlanName = "Super Admin"

// IsSuperAdminPlan reports the fully unlocked internal plan (assign via admin billing).
func IsSuperAdminPlan(name string) bool {
	return strings.EqualFold(strings.TrimSpace(name), SuperAdminPlanName)
}

// EnsureSuperAdminPlan upserts the Super Admin plan row (is_custom=true → enable-all features).
func (s *Service) EnsureSuperAdminPlan(ctx context.Context) error {
	if s == nil || s.Pool == nil {
		return errors.New("billing service unavailable")
	}
	desc := "Internal unlock — every feature enabled, unlimited SKUs, large AI grant (not sold publicly)"
	var id int64
	err := s.Pool.QueryRow(ctx, `
		SELECT id FROM plans WHERE lower(name) = lower($1) ORDER BY id LIMIT 1`,
		SuperAdminPlanName).Scan(&id)
	if errors.Is(err, pgx.ErrNoRows) {
		_, err = s.Pool.Exec(ctx, `
			INSERT INTO plans (name, description, monthly_credits, yearly_credits, max_products, is_custom, term)
			VALUES ($1, $2, $3, NULL, NULL, true, 'monthly')`,
			SuperAdminPlanName, desc, EnterpriseUnlimitedCredits)
		return err
	}
	if err != nil {
		return err
	}
	_, err = s.Pool.Exec(ctx, `
		UPDATE plans SET description = $2, monthly_credits = $3, max_products = NULL,
			is_custom = true, term = 'monthly', updated_at = now()
		WHERE id = $1`, id, desc, EnterpriseUnlimitedCredits)
	return err
}