package admin

import (
	"context"

	"github.com/google/uuid"

	"github.com/yuxingu/digital-psychology/apps/api/internal/repository"
)

// EntitlementFlags summarizes effective rights.
type EntitlementFlags struct {
	ReportDetailViaMembership bool `json:"report_detail_via_membership"`
	DeepAccessCount           int  `json:"deep_access_count"`
}

// UserEntitlement is the CommerceEntitlement ops read model.
type UserEntitlement struct {
	UserID           uuid.UUID                     `json:"user_id"`
	Membership       *repository.MembershipRow     `json:"membership"`
	AskPaidQuotaLeft int                           `json:"ask_paid_quota_left"`
	Flags            EntitlementFlags              `json:"flags"`
	DeepAccesses     []repository.DeepAccessBrief  `json:"deep_accesses"`
}

// GetUserEntitlement aggregates membership + deep access + quotas.
func (s *Service) GetUserEntitlement(ctx context.Context, userID uuid.UUID) (*UserEntitlement, error) {
	ok, err := s.Repo.UserExists(ctx, userID)
	if err != nil {
		return nil, err
	}
	if !ok {
		return nil, ErrUserNotFound
	}
	_, _, paidLeft, _, _, err := s.Repo.GetUserAccount(ctx, userID)
	if err != nil {
		return nil, err
	}
	mem, err := s.Reports.GetMembership(ctx, userID)
	if err != nil {
		return nil, err
	}
	count, err := s.Repo.CountDeepAccessForUser(ctx, userID)
	if err != nil {
		return nil, err
	}
	items, err := s.Repo.ListDeepAccessForUser(ctx, userID, 20)
	if err != nil {
		return nil, err
	}
	if items == nil {
		items = []repository.DeepAccessBrief{}
	}
	return &UserEntitlement{
		UserID:           userID,
		Membership:       mem,
		AskPaidQuotaLeft: paidLeft,
		Flags: EntitlementFlags{
			ReportDetailViaMembership: mem != nil && mem.Active,
			DeepAccessCount:           count,
		},
		DeepAccesses: items,
	}, nil
}