package memory

import "context"

// APIAdapter adapts the memory Service to a simplified API interface.
// This bridges between the rich domain model and the Gateway's REST handler expectations.
type APIAdapter struct {
	svc *Service
}

// APIEntry is the simplified memory entry for REST API responses.
type APIEntry struct {
	ID       string   `json:"id"`
	UserID   string   `json:"user_id"`
	Content  string   `json:"content"`
	Summary  string   `json:"summary"`
	Keywords []string `json:"keywords"`
	Category string   `json:"category"`
	Priority float64  `json:"priority"`
}

// NewAPIAdapter wraps a Service for REST API consumption.
func NewAPIAdapter(svc *Service) *APIAdapter {
	return &APIAdapter{svc: svc}
}

func (a *APIAdapter) Search(ctx context.Context, userID, query string, limit int) (any, error) {
	memories, err := a.svc.Search(ctx, SearchQuery{UserID: userID, Query: query, Limit: limit})
	if err != nil {
		return nil, err
	}
	result := make([]APIEntry, len(memories))
	for i, m := range memories {
		result[i] = toEntry(m)
	}
	return result, nil
}

func (a *APIAdapter) List(ctx context.Context, userID string, limit int) (any, error) {
	memories, err := a.svc.List(ctx, userID, limit)
	if err != nil {
		return nil, err
	}
	result := make([]APIEntry, len(memories))
	for i, m := range memories {
		result[i] = toEntry(m)
	}
	return result, nil
}

func (a *APIAdapter) Add(ctx context.Context, userID, content, category string, priority float64) (any, error) {
	m, err := a.svc.Add(ctx, userID, "", content, category, priority)
	if err != nil {
		return nil, err
	}
	e := toEntry(*m)
	return &e, nil
}

func (a *APIAdapter) Get(ctx context.Context, id string) (any, error) {
	m, err := a.svc.GetByID(ctx, id)
	if err != nil {
		return nil, err
	}
	e := toEntry(*m)
	return &e, nil
}

func (a *APIAdapter) Delete(ctx context.Context, id string) error {
	return a.svc.Delete(ctx, id)
}

func toEntry(m Memory) APIEntry {
	return APIEntry{
		ID:       m.ID,
		UserID:   m.UserID,
		Content:  m.Content,
		Summary:  m.Summary,
		Keywords: m.Keywords,
		Category: m.Category,
		Priority: m.Priority,
	}
}

// Ensure we use context
var _ = context.Background