// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

// Entity Comparison Implementation
// Advanced entity comparison and analysis features

export interface EntityComparison {
    entities: any[];
    commonRelationships: any[];
    uniqueRelationships: { [entityName: string]: any[] };
    similarityScore: number;
    comparisonMetrics: EntityComparisonMetrics;
    sharedDomains: string[];
    sharedTopics: string[];
    temporalOverlap: TemporalOverlap;
}

export interface EntityComparisonMetrics {
    totalRelationships: { [entityName: string]: number };
    averageConfidence: { [entityName: string]: number };
    averageStrength: { [entityName: string]: number };
    centralityScore: { [entityName: string]: number };
    influenceScore: { [entityName: string]: number };
}

export interface TemporalOverlap {
    overlapPeriod: string;
    overlapPercentage: number;
    commonTimeframe: {
        start: string;
        end: string;
    };
}

export interface EntityClusterAnalysis {
    clusters: EntityCluster[];
    entityClusterMembership: { [entityName: string]: string };
    crossClusterConnections: number;
    clusterCoherence: { [clusterId: string]: number };
}

export interface EntityCluster {
    clusterId: string;
    entities: string[];
    centerEntity: string;
    clusterType: "functional" | "temporal" | "topical" | "organizational";
    coherenceScore: number;
    description: string;
}

/**
 * Entity Comparison Component
 * Handles comparing multiple entities and analyzing their relationships
 */
export class EntityComparisonManager {
    private comparisonPanel: HTMLElement | null = null;
    private selectedEntities: any[] = [];
    private currentComparison: EntityComparison | null = null;
    private maxComparisonEntities: number = 5;

    constructor() {
        this.initializeComparisonPanel();
        this.setupComparisonEventHandlers();
    }

    /**
     * Initialize comparison panel
     */
    private initializeComparisonPanel(): void {
        this.createComparisonPanel();
        this.setupComparisonControls();
    }

    /**
     * Show comparison panel
     */
    showComparisonPanel(): void {
        if (this.comparisonPanel) {
            this.comparisonPanel.style.display = "block";
        }
    }

    /**
     * Hide comparison panel
     */
    hideComparisonPanel(): void {
        if (this.comparisonPanel) {
            this.comparisonPanel.style.display = "none";
        }
    }

    /**
     * Start comparison with specific entities
     */
    startComparison(entities: any[]): void {
        this.selectedEntities = entities.slice(0, this.maxComparisonEntities);
        this.showComparisonPanel();

        if (this.selectedEntities.length >= 2) {
            this.performComparison();
        }
    }

    /**
     * Perform entity comparison (simplified for now)
     */
    private async performComparison(): Promise<void> {
        console.log("Performing comparison for:", this.selectedEntities);
        // Implementation would go here
    }

    /**
     * Create comparison panel (simplified)
     */
    private createComparisonPanel(): void {
        this.comparisonPanel = document.createElement("div");
        this.comparisonPanel.id = "entityComparisonPanel";
        this.comparisonPanel.className = "entity-comparison-panel";
        this.comparisonPanel.innerHTML = `
            <div class="panel-header">
                <h3>Entity Comparison</h3>
                <button class="close-btn" id="closeComparisonBtn">
                    <i class="bi bi-x"></i>
                </button>
            </div>
            <div class="panel-content">
                <p>Entity comparison functionality coming soon...</p>
            </div>
        `;

        this.comparisonPanel.style.cssText = `
            position: fixed;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            width: 400px;
            max-height: 80vh;
            overflow-y: auto;
            background: white;
            border: 1px solid #ddd;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            z-index: 1002;
            display: none;
            padding: 16px;
        `;

        document.body.appendChild(this.comparisonPanel);
    }

    /**
     * Set up comparison controls
     */
    private setupComparisonControls(): void {
        const closeBtn = document.getElementById("closeComparisonBtn");
        if (closeBtn) {
            closeBtn.addEventListener("click", () =>
                this.hideComparisonPanel(),
            );
        }
    }

    /**
     * Set up comparison event handlers
     */
    private setupComparisonEventHandlers(): void {
        // Listen for comparison requests
        document.addEventListener("requestEntityComparison", (e: any) => {
            const entities = e.detail.entities;
            this.startComparison(entities);
        });
    }

    /**
     * Get selected entities
     */
    getSelectedEntities(): any[] {
        return [...this.selectedEntities];
    }

    /**
     * Get current comparison
     */
    getCurrentComparison(): EntityComparison | null {
        return this.currentComparison;
    }
}
