package document

import (
	"time"

	"queryorchestration/internal/serviceconfig"

	"github.com/google/uuid"
)

// DocumentSummary contains minimal document identification info.
type DocumentSummary struct {
	ID       uuid.UUID
	ClientID string
	Hash     string
}

// DocumentExternal contains document info for external API responses.
// Note: Query functionality (Fields) has been removed. See remove_query_plan.md for details.
type DocumentExternal struct {
	Id       uuid.UUID
	ClientID string
	Hash     string
}

// DocumentEnriched contains full document details including metadata, labels, and optionally text record.
// Used by GET /document/{id} endpoint.
// Note: Query functionality (Fields) has been removed. See remove_query_plan.md for details.
//
// Milestone 2.3a adds two fields for the mutable-metadata feature:
//   - CustomSchemaID is the bound schema id (nil when the document has no schema).
//   - HasCustomMetadata is true iff document_custom_metadata has >=1 row for the document.
//
// Both values are populated from the extended GetDocumentEnriched query in
// one round-trip; no follow-up DB call is made.
type DocumentEnriched struct {
	ID                uuid.UUID
	ClientID          string
	Hash              string
	HasTextRecord     bool
	FolderID          *uuid.UUID
	Filename          *string
	OriginalPath      *string
	Labels            []LabelRecord
	TextRecord        *TextRecord // Only populated when includeTextRecord=true
	FileSizeBytes     *int64      // File size in bytes (nil for legacy documents)
	CustomSchemaID    *uuid.UUID  // Bound schema id (nil = no schema)
	HasCustomMetadata bool        // True iff any document_custom_metadata row exists
}

// LabelRecord represents a label applied to a document.
type LabelRecord struct {
	ID         uuid.UUID
	DocumentID uuid.UUID
	Label      string
	AppliedBy  string
	AppliedAt  time.Time
}

// TextRecord represents the field extraction response for a document.
// This mirrors the FieldExtractionResponse from the API.
type TextRecord struct {
	ID           uuid.UUID
	DocumentID   uuid.UUID
	Version      int32
	SingleFields interface{}
	ArrayFields  interface{}
	CreatedAt    time.Time
	CreatedBy    string
}

// Service provides document-related operations.
type Service struct {
	cfg serviceconfig.ConfigProvider
}

// New creates a new Document service instance.
func New(cfg serviceconfig.ConfigProvider) *Service {
	return &Service{
		cfg,
	}
}