import {
  UniversalGraphData,
  UniversalNode,
  UniversalLink,
  GraphDataAdapter,
  GraphVisualizationConfig,
  GraphVisualizationType,
} from "@/types/graph-visualization";
import { TemporalNode, TemporalLink, GraphFrame } from "@/types/temporal";
import { Entity, Relation } from "@/types";
import {
  detectSchemaType,
  getSchemaCapabilities,
} from "@/lib/schema-detection";

// Temporal Data Adapter
export class TemporalDataAdapter implements GraphDataAdapter<GraphFrame> {
  adapt(data: GraphFrame): UniversalGraphData {
    const nodes: UniversalNode[] = data.nodes.map((node: TemporalNode) => ({
      id: node.id,
      name: node.name || node.id,
      label: node.name || node.id,
      type: node.type || "entity",
      raw_prompt: node.raw_prompt,
      importance: (node as any).importance,
      x: node.x,
      y: node.y,
      fx: node.fx,
      fy: node.fy,
      properties: { ...node },
    }));

    const links: UniversalLink[] = data.links.map((link: TemporalLink) => ({
      id: link.id,
      source: typeof link.source === "string" ? link.source : link.source.id,
      target: typeof link.target === "string" ? link.target : link.target.id,
      type: link.type || "relation",
      label: link.type || "relation",
      relationship: link.type,
      interaction_prompt: link.interaction_prompt,
      importance: (link as any).importance,
      value: link.value || 1,
      weight: link.value || 1,
      properties: { ...link },
    }));

    return {
      nodes,
      links,
      metadata: data.metadata,
    };
  }

  validate(data: GraphFrame): boolean {
    return (
      data &&
      Array.isArray(data.nodes) &&
      Array.isArray(data.links) &&
      data.nodes.every((node) => node.id) &&
      data.links.every((link) => link.id && link.source && link.target)
    );
  }

  getDefaultConfig(): Partial<GraphVisualizationConfig> {
    return {
      type: GraphVisualizationType.TEMPORAL_GRAPH,
      nodeRadius: 8,
      linkDistance: 100,
      chargeStrength: -300,
      showNodeLabels: true,
      showLinkLabels: true,
      showDirectionalArrows: true,
      useCurvedLinks: true,
      enableZoom: true,
      enablePan: true,
      enableDrag: true,
      enableSelection: true,
      layoutType: "force",
      animationDuration: 500,
    };
  }
}

// Knowledge Graph Data Adapter
export class KnowledgeGraphDataAdapter
  implements
    GraphDataAdapter<{
      entities: Entity[];
      relations: Relation[];
      metadata?: Record<string, any>;
    }>
{
  adapt(data: {
    entities: Entity[];
    relations: Relation[];
    metadata?: Record<string, any>;
  }): UniversalGraphData {
    console.log("🔧 KnowledgeGraphDataAdapter.adapt() called with:", {
      entities: data.entities?.length || 0,
      relations: data.relations?.length || 0,
      hasMetadata: !!data.metadata,
    });

    const nodes: UniversalNode[] = data.entities.map(
      (entity: Entity, index) => {
        // Debug logging to check entity data
        console.log(`Entity ${index}:`, {
          id: entity.id,
          name: entity.name,
          type: entity.type,
          hasName: !!entity.name,
          nameLength: entity.name?.length || 0,
        });

        // Ensure we have a proper label - fallback to ID if name is missing
        const label = entity.name || entity.id || `Node ${index}`;

        return {
          id: entity.id,
          name: entity.name,
          label: label,
          type: entity.type,
          raw_prompt: (entity as any).raw_prompt,
          raw_prompt_ref: (entity as any).raw_prompt_ref,
          raw_text_ref: (entity as any).raw_text_ref,
          importance: (entity as any).importance,
          group: this.getTypeGroup(entity.type),
          properties: entity.properties,
          // Simple grid layout for initial positioning
          x: 100 + (index % 6) * 120,
          y: 100 + Math.floor(index / 6) * 100,
        };
      }
    );

    // Create set of valid node IDs for relation validation
    const validNodeIds = new Set(nodes.map((node) => node.id));

    // Filter relations to only include those with valid source and target nodes
    const validRelations = data.relations.filter((relation: Relation) => {
      const hasValidSource = validNodeIds.has(relation.source);
      const hasValidTarget = validNodeIds.has(relation.target);

      if (!hasValidSource || !hasValidTarget) {
        console.warn(
          `Skipping relation ${relation.id}: ` +
            `source '${relation.source}' ${
              hasValidSource ? "exists" : "missing"
            }, ` +
            `target '${relation.target}' ${
              hasValidTarget ? "exists" : "missing"
            }`
        );
        return false;
      }
      return true;
    });

    // Log filtering stats
    const filteredCount = data.relations.length - validRelations.length;
    if (filteredCount > 0) {
      console.warn(
        `Filtered out ${filteredCount} invalid relations out of ${data.relations.length} total`
      );
    }

    const links: UniversalLink[] = validRelations.map((relation: Relation) => ({
      id: relation.id,
      source: relation.source,
      target: relation.target,
      type: relation.type,
      label: relation.type,
      relationship: relation.type,
      interaction_prompt: relation.interaction_prompt,
      interaction_prompt_ref: (relation as any).interaction_prompt_ref,
      importance: (relation as any).importance,
      value: 1,
      weight: 1,
      properties: relation.properties,
    }));

    // Detect schema type and add capabilities
    const schemaType = detectSchemaType(data);
    const schemaCapabilities = getSchemaCapabilities(schemaType);

    return {
      nodes,
      links,
      failures: (data as any).failures || [],
      metadata: {
        ...data.metadata,
        schema_type: schemaType,
        schema_capabilities: schemaCapabilities,
      },
    };
  }

  validate(data: {
    entities: Entity[];
    relations: Relation[];
    metadata?: Record<string, any>;
  }): boolean {
    return (
      data &&
      Array.isArray(data.entities) &&
      Array.isArray(data.relations) &&
      data.entities.every((entity) => entity.id && entity.name) &&
      data.relations.every(
        (relation) =>
          relation.id && relation.source && relation.target && relation.type
      )
    );
  }

  getDefaultConfig(): Partial<GraphVisualizationConfig> {
    return {
      type: GraphVisualizationType.KNOWLEDGE_GRAPH,
      nodeRadius: 15,
      linkDistance: 100,
      chargeStrength: -300,
      showNodeLabels: true,
      showLinkLabels: true,
      showDirectionalArrows: false,
      useCurvedLinks: false,
      enableZoom: true,
      enablePan: true,
      enableDrag: true,
      enableSelection: true,
      layoutType: "force",
      animationDuration: 500,
      nodeColorScheme: [
        "#ff6b6b",
        "#4ecdc4",
        "#45b7d1",
        "#96ceb4",
        "#feca57",
        "#ff9ff3",
      ],
    };
  }

  private getTypeGroup(type: string): number {
    const typeGroups: Record<string, number> = {
      Person: 1,
      Organization: 2,
      Location: 3,
      Event: 4,
      Concept: 5,
      Product: 6,
    };
    return typeGroups[type] || 0;
  }
}

// Reference-Based Data Adapter (extends KnowledgeGraphDataAdapter)
export class ReferenceBasedDataAdapter extends KnowledgeGraphDataAdapter {
  adapt(data: {
    entities: Entity[];
    relations: Relation[];
    failures?: Array<any>;
    metadata?: Record<string, any>;
  }): UniversalGraphData {
    console.log(
      "🎯 ReferenceBasedDataAdapter.adapt() called - will delegate to parent"
    );
    // Use parent adapter for basic conversion
    const result = super.adapt(data);

    // Enhance with reference-based specific features
    result.failures = data.failures || [];

    // Ensure schema type is set to reference_based
    if (result.metadata) {
      result.metadata.schema_type = "reference_based";
      result.metadata.schema_capabilities =
        getSchemaCapabilities("reference_based");
    }

    return result;
  }

  validate(data: any): boolean {
    // Use parent validation plus check for reference-based features
    const basicValid = super.validate(data);
    if (!basicValid) return false;

    // Additional validation for reference-based features
    const hasReferenceFeatures = detectSchemaType(data) === "reference_based";
    return hasReferenceFeatures;
  }
}

// Simple Graph Data Adapter (for backward compatibility)
export class SimpleGraphDataAdapter
  implements
    GraphDataAdapter<{
      nodes: Array<{
        id: string;
        name: string;
        type: string;
        [key: string]: any;
      }>;
      links: Array<{
        source: string;
        target: string;
        type: string;
        [key: string]: any;
      }>;
    }>
{
  adapt(data: {
    nodes: Array<{
      id: string;
      name: string;
      type: string;
      [key: string]: any;
    }>;
    links: Array<{
      source: string;
      target: string;
      type: string;
      [key: string]: any;
    }>;
  }): UniversalGraphData {
    const nodes: UniversalNode[] = data.nodes.map((node, index) => ({
      id: node.id,
      name: node.name,
      label: node.name,
      type: node.type,
      importance: node.importance,
      properties: { ...node },
      // Simple grid layout
      x: 100 + (index % 4) * 120,
      y: 100 + Math.floor(index / 4) * 100,
    }));

    const links: UniversalLink[] = data.links.map((link, index) => ({
      id: `link-${index}`,
      source: link.source,
      target: link.target,
      type: link.type,
      label: link.type,
      relationship: link.type,
      importance: link.importance,
      value: 1,
      weight: 1,
      properties: { ...link },
    }));

    return {
      nodes,
      links,
      metadata: {
        entity_count: nodes.length,
        relation_count: links.length,
      },
    };
  }

  validate(data: {
    nodes: Array<{
      id: string;
      name: string;
      type: string;
      [key: string]: any;
    }>;
    links: Array<{
      source: string;
      target: string;
      type: string;
      [key: string]: any;
    }>;
  }): boolean {
    return (
      data &&
      Array.isArray(data.nodes) &&
      Array.isArray(data.links) &&
      data.nodes.every((node) => node.id && node.name && node.type) &&
      data.links.every((link) => link.source && link.target && link.type)
    );
  }

  getDefaultConfig(): Partial<GraphVisualizationConfig> {
    return {
      type: GraphVisualizationType.SIMPLE_GRAPH,
      nodeRadius: 20,
      linkDistance: 80,
      chargeStrength: -200,
      showNodeLabels: true,
      showLinkLabels: true,
      showDirectionalArrows: false,
      useCurvedLinks: false,
      enableZoom: false,
      enablePan: false,
      enableDrag: false,
      enableSelection: false,
      layoutType: "grid",
      animationDuration: 0,
    };
  }
}

// Factory function to get appropriate adapter
export function getGraphDataAdapter(
  type?: GraphVisualizationType,
  data?: any
): GraphDataAdapter {
  console.log("🏭 getGraphDataAdapter called with:", { type, hasData: !!data });

  // Auto-detect schema if data provided but no type specified
  if (!type && data) {
    try {
      const schemaType = detectSchemaType(data);
      console.log(
        "🔍 Auto-detecting adapter type based on schema:",
        schemaType
      );

      if (schemaType === "reference_based") {
        type = GraphVisualizationType.KNOWLEDGE_GRAPH;
      } else {
        type = GraphVisualizationType.SIMPLE_GRAPH;
      }
    } catch (error) {
      console.warn(
        "Schema detection failed in adapter factory, using default KNOWLEDGE_GRAPH:",
        error
      );
      type = GraphVisualizationType.KNOWLEDGE_GRAPH;
    }
  }

  // Default to KNOWLEDGE_GRAPH if no type provided
  if (!type) {
    type = GraphVisualizationType.KNOWLEDGE_GRAPH;
  }

  switch (type) {
    case GraphVisualizationType.TEMPORAL_GRAPH:
      return new TemporalDataAdapter();
    case GraphVisualizationType.KNOWLEDGE_GRAPH:
      // Use ReferenceBasedDataAdapter for reference-based data, otherwise KnowledgeGraphDataAdapter
      if (data) {
        try {
          if (detectSchemaType(data) === "reference_based") {
            console.log(
              "✅ Using ReferenceBasedDataAdapter for reference-based schema"
            );
            return new ReferenceBasedDataAdapter();
          }
        } catch (error) {
          console.warn(
            "Schema detection failed during adapter selection, using KnowledgeGraphDataAdapter:",
            error
          );
        }
      }
      console.log(
        "✅ Using KnowledgeGraphDataAdapter for direct-based or unknown schema"
      );
      return new KnowledgeGraphDataAdapter();
    case GraphVisualizationType.SIMPLE_GRAPH:
      console.log("✅ Using SimpleGraphDataAdapter");
      return new SimpleGraphDataAdapter();
    default:
      console.log("✅ Using KnowledgeGraphDataAdapter (default fallback)");
      return new KnowledgeGraphDataAdapter(); // Default fallback
  }
}