package action

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"time"

	"github.com/rockliang/poimen/workflows/pkg/db"
)

// IndexGraphRAGInput sends workflow relations to GraphRAG for indexing
type IndexGraphRAGInput struct {
	WorkflowID string            `json:"workflow_id"`
	Version    int               `json:"version"`
	Nodes      []db.WorkflowNode `json:"nodes"`
	Relations  []EdgeWithWording `json:"relations"`
}

// IndexGraphRAGOutput confirms indexing status
type IndexGraphRAGOutput struct {
	WorkflowID       string `json:"workflow_id"`
	Version          int    `json:"version"`
	IndexedEntities  int    `json:"indexed_entities"`
	IndexedEdges     int    `json:"indexed_edges"`
	Status           string `json:"status"`
	GraphRAGChecksum string `json:"graph_rag_checksum"`
	IndexedAt        string `json:"indexed_at"`
}

// IndexGraphRAGActivity indexes workflow canvas to GraphRAG (stub for now)
func IndexGraphRAGActivity(ctx context.Context, input IndexGraphRAGInput) (IndexGraphRAGOutput, error) {
	output := IndexGraphRAGOutput{
		WorkflowID:      input.WorkflowID,
		Version:         input.Version,
		Status:          "indexed",
		IndexedEntities: len(input.Nodes),
		IndexedEdges:    len(input.Relations),
		IndexedAt:       time.Now().UTC().Format(time.RFC3339),
	}

	// Stub implementation - actual GraphRAG indexing would happen here
	// For now, just return success
	return output, nil
}

// QueryGraphRAGRelationsInput for direct relation discovery
type QueryGraphRAGRelationsInput struct {
	WorkflowID string                 `json:"workflow_id"`
	Version    int                    `json:"version"`
	Query      string                 `json:"query"`
	TopK       int                    `json:"top_k"`
	Filters    map[string]interface{} `json:"filters,omitempty"`
}

// QueryGraphRAGRelationsOutput returns discovered relations
type QueryGraphRAGRelationsOutput struct {
	Query       string            `json:"query"`
	Results     []EdgeWithWording `json:"results"`
	TotalCount  int               `json:"total_count"`
	ExecutionMs int64             `json:"execution_time_ms"`
}

// QueryGraphRAGRelationsActivity queries GraphRAG for relation patterns (stub)
func QueryGraphRAGRelationsActivity(ctx context.Context, input QueryGraphRAGRelationsInput) (QueryGraphRAGRelationsOutput, error) {
	output := QueryGraphRAGRelationsOutput{
		Query:      input.Query,
		Results:    []EdgeWithWording{},
		TotalCount: 0,
	}

	// Stub implementation - actual GraphRAG querying would happen here
	return output, nil
}