import { TemporalNode, TemporalLink, GraphFrame } from "@/types/temporal";

/**
 * Standardize node data from different sources
 */
export function standardizeNodes(entities: any[]): TemporalNode[] {
  if (!Array.isArray(entities)) {
    console.warn("Entities is not an array, returning empty array");
    return [];
  }

  return entities
    .filter((entity) => {
      if (!entity || typeof entity !== "object") {
        console.warn("Skipping invalid entity (not an object):", entity);
        return false;
      }
      if (!entity.id || typeof entity.id !== "string") {
        console.warn("Skipping entity with invalid ID:", entity);
        return false;
      }
      return true;
    })
    .map((entity) => ({
      id: entity.id,
      name: entity.name || entity.id,
      type: entity.type || "Unknown",
      raw_prompt: entity.raw_prompt || "",
      x: entity.x,
      y: entity.y,
      fx: entity.fx || null,
      fy: entity.fy || null,
    }));
}

/**
 * Standardize link data from different sources
 */
export function standardizeLinks(
  relations: any[],
  validNodeIds: Set<string>
): TemporalLink[] {
  if (!Array.isArray(relations)) {
    console.warn("Relations is not an array, returning empty array");
    return [];
  }

  return relations
    .filter((relation) => {
      if (!relation || typeof relation !== "object") {
        console.warn("Skipping invalid relation (not an object):", relation);
        return false;
      }
      if (!relation.id || typeof relation.id !== "string") {
        console.warn("Skipping relation with invalid ID:", relation);
        return false;
      }
      if (!relation.source || !relation.target) {
        console.warn("Skipping relation with missing source/target:", relation);
        return false;
      }
      // Check if both source and target nodes exist
      if (!validNodeIds.has(relation.source)) {
        console.warn(
          `Skipping relation ${relation.id}: source node '${relation.source}' not found`
        );
        return false;
      }
      if (!validNodeIds.has(relation.target)) {
        console.warn(
          `Skipping relation ${relation.id}: target node '${relation.target}' not found`
        );
        return false;
      }
      return true;
    })
    .map((relation) => ({
      id: relation.id,
      source: relation.source,
      target: relation.target,
      type: relation.type || "Unknown",
      interaction_prompt: relation.interaction_prompt || "",
      value: relation.value || 1,
    }));
}

/**
 * Validate and clean graph data
 */
export function validateGraphData(data: any): GraphFrame {
  const nodes = standardizeNodes(data.entities || data.nodes || []);
  const validNodeIds = new Set(nodes.map((node) => node.id));
  const links = standardizeLinks(
    data.relations || data.links || [],
    validNodeIds
  );

  // Log warnings if data was filtered
  const originalNodeCount = data.entities?.length || data.nodes?.length || 0;
  const originalLinkCount = data.relations?.length || data.links?.length || 0;

  if (nodes.length < originalNodeCount) {
    console.warn(
      `Filtered out ${originalNodeCount - nodes.length} invalid nodes`
    );
  }
  if (links.length < originalLinkCount) {
    console.warn(
      `Filtered out ${originalLinkCount - links.length} invalid links`
    );
  }

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

/**
 * Get node color based on type - Modern design system colors
 */
export function getNodeColor(type?: string): string {
  const colors: Record<string, string> = {
    // Core entity types - aligned with sidebar design system
    Agent: "#ef4444", // Red - matches modern design
    Tool: "#10b981", // Emerald - matches sidebar entities
    Task: "#3b82f6", // Blue - matches sidebar relations
    Input: "#8b5cf6", // Purple - professional accent
    Output: "#f59e0b", // Amber - warm accent
    Human: "#ec4899", // Pink - human interaction
    Entity: "#06b6d4", // Cyan - information

    // Semantic types
    Person: "#ef4444", // Red - human entities
    Organization: "#10b981", // Emerald - structured entities
    Location: "#3b82f6", // Blue - geographic
    Event: "#8b5cf6", // Purple - temporal
    Concept: "#f59e0b", // Amber - abstract
    Product: "#ec4899", // Pink - tangible items

    // Technical types
    Service: "#06b6d4", // Cyan - technical services
    Database: "#84cc16", // Lime - data storage
    API: "#f97316", // Orange - interfaces
    Process: "#6366f1", // Indigo - workflows
  };
  return colors[type || "Unknown"] || "#64748b"; // Modern gray default
}

/**
 * Get node size based on type
 */
export function getNodeSize(_type?: string): number {
  return 75;
}

/**
 * Format tooltip content for nodes
 */
export function formatNodeTooltip(node: TemporalNode): string {
  return `${node.name || node.id}\nType: ${node.type || "Unknown"}\n${
    node.raw_prompt || ""
  }`;
}

/**
 * Format tooltip content for links
 */
export function formatLinkTooltip(link: TemporalLink): string {
  return `${link.type || "Relation"}\n${link.interaction_prompt || ""}`;
}

export function processLinksForVisualization(
  links: TemporalLink[]
): TemporalLink[] {
  // Group links by source-target pairs to handle multiple connections
  const linkGroups = new Map<string, TemporalLink[]>();

  links.forEach((link) => {
    const sourceId =
      typeof link.source === "object" ? link.source.id : link.source;
    const targetId =
      typeof link.target === "object" ? link.target.id : link.target;
    const key = `${sourceId}-${targetId}`;
    const reverseKey = `${targetId}-${sourceId}`;

    // Use consistent key for bidirectional relationships
    const groupKey = sourceId < targetId ? key : reverseKey;

    if (!linkGroups.has(groupKey)) {
      linkGroups.set(groupKey, []);
    }
    linkGroups.get(groupKey)!.push(link);
  });

  // Assign link indices for visual separation
  const processedLinks: TemporalLink[] = [];

  linkGroups.forEach((groupLinks, _key) => {
    groupLinks.forEach((link, index) => {
      processedLinks.push({
        ...link,
        linkIndex: index,
        groupSize: groupLinks.length,
      });
    });
  });

  return processedLinks;
}

/**
 * Get relation color based on type
 */
export function getRelationColor(type?: string): string {
  const colors: Record<string, string> = {
    // Data Flow Relations (Blue family)
    CONSUMED_BY: "#3b82f6", // Blue - data input
    PRODUCES: "#1d4ed8", // Darker blue - data output
    DELIVERS_TO: "#60a5fa", // Light blue - delivery

    // Execution Relations (Green family)
    PERFORMS: "#10b981", // Emerald - primary execution
    ASSIGNED_TO: "#059669", // Dark emerald - assignment

    // Tool Relations (Orange family)
    USES: "#f59e0b", // Amber - tool usage
    REQUIRED_BY: "#d97706", // Dark amber - tool dependency

    // Workflow Relations (Purple family)
    SUBTASK_OF: "#8b5cf6", // Violet - hierarchy
    NEXT: "#7c3aed", // Dark violet - sequence

    // Human Relations (Pink family)
    INTERVENES: "#ec4899", // Pink - human intervention
    REVIEWS: "#db2777", // Dark pink - human review
  };
  return colors[type || "Unknown"] || "#64748b"; // Default gray
}

/**
 * Get relation line style based on type
 */
export function getRelationLineStyle(type?: string): string {
  const styles: Record<string, string> = {
    // Primary actions - solid thick lines
    PERFORMS: "solid",
    ASSIGNED_TO: "solid",

    // Data flow - dotted lines
    CONSUMED_BY: "dotted",
    PRODUCES: "dotted",
    DELIVERS_TO: "dotted",

    // Tool usage - dashed lines
    USES: "dashed",
    REQUIRED_BY: "dashed",

    // Workflow - solid thin lines
    SUBTASK_OF: "solid",
    NEXT: "solid",

    // Human interactions - solid lines
    INTERVENES: "solid",
    REVIEWS: "solid",
  };
  return styles[type || "Unknown"] || "solid";
}

/**
 * Get relation width multiplier based on importance and type
 */
export function getRelationWidth(type?: string, importance?: string): number {
  // Base width multipliers by type
  const typeWidths: Record<string, number> = {
    PERFORMS: 1.2, // Thicker for primary actions
    ASSIGNED_TO: 1.1,
    CONSUMED_BY: 1.0, // Standard for data flow
    PRODUCES: 1.0,
    DELIVERS_TO: 0.9,
    USES: 0.8, // Thinner for tool usage
    REQUIRED_BY: 0.8,
    SUBTASK_OF: 0.7, // Thinnest for workflow
    NEXT: 0.7,
    INTERVENES: 1.1, // Prominent for human actions
    REVIEWS: 1.0,
  };

  // Importance multipliers
  const importanceMultipliers: Record<string, number> = {
    CRITICAL: 1.5,
    HIGH: 1.2,
    MEDIUM: 1.0,
    LOW: 0.8,
    NEGLIGIBLE: 0.6,
  };

  const baseWidth = typeWidths[type || "Unknown"] || 1.0;
  const importanceMultiplier =
    importanceMultipliers[importance || "MEDIUM"] || 1.0;

  return baseWidth * importanceMultiplier;
}

/**
 * Get node shape based on type for better visual differentiation
 */
export function getNodeShape(_type?: string): string {
  return "ellipse"; 
}

/**
 * Get border style based on entity importance
 */
export function getNodeBorderStyle(importance?: string): string {
  const styles: Record<string, string> = {
    CRITICAL: "solid", // Thick solid border
    HIGH: "dashed", // Dashed border
    MEDIUM: "solid", // Normal solid border
    LOW: "dotted", // Dotted border
    NEGLIGIBLE: "dotted", // Light dotted border
  };
  return styles[importance || "MEDIUM"] || "solid";
}

/**
 * Get border width based on importance
 */
export function getNodeBorderWidth(importance?: string): number {
  const widths: Record<string, number> = {
    CRITICAL: 4, // Very thick
    HIGH: 3, // Thick
    MEDIUM: 2, // Normal
    LOW: 1, // Thin
    NEGLIGIBLE: 1, // Very thin
  };
  return widths[importance || "MEDIUM"] || 2;
}

/**
 * Get text styling based on node type
 */
export function getNodeTextStyle(type?: string): {
  weight: string;
  transform: string;
  decoration: string;
} {
  const styles: Record<
    string,
    { weight: string; transform: string; decoration: string }
  > = {
    Agent: { weight: "bold", transform: "uppercase", decoration: "none" },
    Human: { weight: "bold", transform: "capitalize", decoration: "none" },
    Task: { weight: "600", transform: "none", decoration: "none" },
    Tool: { weight: "500", transform: "lowercase", decoration: "none" },
    Input: { weight: "400", transform: "none", decoration: "none" },
    Output: { weight: "600", transform: "none", decoration: "underline" },
  };
  return (
    styles[type || "Unknown"] || {
      weight: "500",
      transform: "none",
      decoration: "none",
    }
  );
}

/**
 * Get shadow configuration based on node type
 */
export function getNodeShadow(type?: string): {
  blur: number;
  color: string;
  offsetX: number;
  offsetY: number;
  opacity: number;
} {
  const shadows: Record<string, any> = {
    Agent: {
      blur: 16,
      color: "rgba(0, 0, 0, 0.25)",
      offsetX: 0,
      offsetY: 6,
      opacity: 0.4,
    },
    Human: {
      blur: 20,
      color: "rgba(236, 72, 153, 0.3)",
      offsetX: 0,
      offsetY: 8,
      opacity: 0.5,
    },
    Task: {
      blur: 12,
      color: "rgba(0, 0, 0, 0.15)",
      offsetX: 0,
      offsetY: 4,
      opacity: 0.3,
    },
    Tool: {
      blur: 8,
      color: "rgba(245, 158, 11, 0.3)",
      offsetX: 2,
      offsetY: 2,
      opacity: 0.4,
    },
    Input: {
      blur: 6,
      color: "rgba(139, 92, 246, 0.2)",
      offsetX: -2,
      offsetY: 2,
      opacity: 0.3,
    },
    Output: {
      blur: 14,
      color: "rgba(239, 68, 68, 0.3)",
      offsetX: 2,
      offsetY: 6,
      opacity: 0.4,
    },
  };
  return (
    shadows[type || "Unknown"] || {
      blur: 12,
      color: "rgba(0, 0, 0, 0.15)",
      offsetX: 0,
      offsetY: 4,
      opacity: 0.3,
    }
  );
}

/**
 * Get high-contrast text color for relation labels
 */
export function getRelationTextColor(type?: string): string {
  const textColors: Record<string, string> = {
    // Data Flow Relations - Dark blue family for good contrast
    CONSUMED_BY: "#1e3a8a", // Dark blue
    PRODUCES: "#1e2a5e", // Very dark blue
    DELIVERS_TO: "#1e40af", // Medium dark blue

    // Execution Relations - Dark green family
    PERFORMS: "#047857", // Dark emerald
    ASSIGNED_TO: "#064e3b", // Very dark emerald

    // Tool Relations - Dark orange/amber family
    USES: "#b45309", // Dark amber
    REQUIRED_BY: "#92400e", // Very dark amber

    // Workflow Relations - Dark purple family
    SUBTASK_OF: "#6b21a8", // Dark violet
    NEXT: "#581c87", // Very dark violet

    // Human Relations - Dark pink family
    INTERVENES: "#be185d", // Dark pink
    REVIEWS: "#9d174d", // Very dark pink
  };
  return textColors[type || "Unknown"] || "#374151"; // Default dark gray
}