/**
 * @file tokenized-assets.ts
 * @notice Tokenized asset reporting for market reporting service
 */

import { MarketReportingService, MarketMetrics, CryptoPriceReport, FXRateReport } from './market-reporting.service';
import { TokenRegistry } from '../../contracts/tokenization/TokenRegistry';

export interface TokenizedAssetReport {
    tokenId: string;
    fabricTokenId: string;
    underlyingAsset: string;
    totalSupply: string;
    backedAmount: string;
    backingRatio: number;
    reserveStatus: {
        reserveId: string;
        totalReserve: string;
        availableReserve: string;
        lastAttested: number;
    };
    marketMetrics: {
        price: number;
        volume24h: number;
        liquidity: number;
    };
    regulatoryStatus: {
        kyc: boolean;
        aml: boolean;
        regulatoryApproval: boolean;
    };
}

export class TokenizedAssetReporting {
    private marketReporting: MarketReportingService;
    private tokenRegistry: TokenRegistry;

    constructor(
        marketReporting: MarketReportingService,
        tokenRegistry: TokenRegistry
    ) {
        this.marketReporting = marketReporting;
        this.tokenRegistry = tokenRegistry;
    }

    /**
     * Generate tokenized asset report
     */
    async generateTokenizedAssetReport(tokenAddress: string): Promise<TokenizedAssetReport> {
        // Get token metadata
        const tokenMetadata = await this.tokenRegistry.getToken(tokenAddress);

        // Get reserve status (from Fabric)
        const reserveStatus = await this.getReserveStatus(tokenMetadata.backingReserve);

        // Get market metrics
        const marketMetrics = await this.getTokenizedAssetMarketMetrics(tokenAddress);

        // Get regulatory status
        const regulatoryStatus = await this.getRegulatoryStatus(tokenAddress);

        return {
            tokenId: tokenAddress,
            fabricTokenId: tokenMetadata.tokenId,
            underlyingAsset: tokenMetadata.underlyingAsset,
            totalSupply: tokenMetadata.totalSupply.toString(),
            backedAmount: tokenMetadata.backedAmount.toString(),
            backingRatio: tokenMetadata.backedAmount > 0
                ? Number(tokenMetadata.totalSupply) / Number(tokenMetadata.backedAmount)
                : 1.0,
            reserveStatus,
            marketMetrics,
            regulatoryStatus
        };
    }

    /**
     * Report tokenized asset to crypto markets
     */
    async reportToCryptoMarkets(tokenAddress: string): Promise<CryptoPriceReport[]> {
        const report = await this.generateTokenizedAssetReport(tokenAddress);
        const tokenMetadata = await this.tokenRegistry.getToken(tokenAddress);

        // Generate price report
        const priceReport: CryptoPriceReport = {
            symbol: `EUR-T`, // Tokenized EUR
            price: report.marketMetrics.price,
            volume24h: report.marketMetrics.volume24h,
            timestamp: Date.now()
        };

        // Report to market reporting service
        await this.marketReporting.reportCryptoPrice(priceReport);

        return [priceReport];
    }

    /**
     * Report tokenized asset to FX markets
     */
    async reportToFXMarkets(tokenAddress: string): Promise<FXRateReport[]> {
        const report = await this.generateTokenizedAssetReport(tokenAddress);
        const tokenMetadata = await this.tokenRegistry.getToken(tokenAddress);

        // Generate FX rate report
        const fxReport: FXRateReport = {
            pair: `${tokenMetadata.underlyingAsset}/USD`,
            rate: report.marketMetrics.price,
            timestamp: Date.now()
        };

        // Report to market reporting service
        await this.marketReporting.reportFXRate(fxReport);

        return [fxReport];
    }

    /**
     * Generate reserve attestation report
     */
    async generateReserveAttestationReport(reserveId: string): Promise<{
        reserveId: string;
        assetType: string;
        totalAmount: string;
        backedAmount: string;
        availableAmount: string;
        attestationHash: string;
        lastVerified: number;
        attestor: string;
    }> {
        // In production, query Fabric reserve manager chaincode
        // For now, return placeholder structure
        return {
            reserveId,
            assetType: 'EUR',
            totalAmount: '0',
            backedAmount: '0',
            availableAmount: '0',
            attestationHash: '0x',
            lastVerified: Date.now(),
            attestor: '0x'
        };
    }

    /**
     * Generate regulatory compliance report
     */
    async generateRegulatoryComplianceReport(tokenAddress: string): Promise<{
        tokenId: string;
        kycStatus: boolean;
        amlStatus: boolean;
        regulatoryApproval: boolean;
        lastAudit: number;
        complianceScore: number;
    }> {
        const tokenMetadata = await this.tokenRegistry.getToken(tokenAddress);
        const regulatoryStatus = await this.getRegulatoryStatus(tokenAddress);

        return {
            tokenId: tokenAddress,
            kycStatus: regulatoryStatus.kyc,
            amlStatus: regulatoryStatus.aml,
            regulatoryApproval: regulatoryStatus.regulatoryApproval,
            lastAudit: Date.now(),
            complianceScore: this.calculateComplianceScore(regulatoryStatus)
        };
    }

    /**
     * Get reserve status
     */
    private async getReserveStatus(reserveId: string): Promise<TokenizedAssetReport['reserveStatus']> {
        // In production, query Fabric reserve manager
        return {
            reserveId,
            totalReserve: '0',
            availableReserve: '0',
            lastAttested: Date.now()
        };
    }

    /**
     * Get tokenized asset market metrics
     */
    private async getTokenizedAssetMarketMetrics(tokenAddress: string): Promise<TokenizedAssetReport['marketMetrics']> {
        // In production, query market data
        return {
            price: 1.0, // 1:1 with underlying
            volume24h: 0,
            liquidity: 0
        };
    }

    /**
     * Get regulatory status
     */
    private async getRegulatoryStatus(tokenAddress: string): Promise<TokenizedAssetReport['regulatoryStatus']> {
        // In production, query regulatory database or Indy credentials
        return {
            kyc: true,
            aml: true,
            regulatoryApproval: true
        };
    }

    /**
     * Calculate compliance score
     */
    private calculateComplianceScore(status: TokenizedAssetReport['regulatoryStatus']): number {
        let score = 0;
        if (status.kyc) score += 33;
        if (status.aml) score += 33;
        if (status.regulatoryApproval) score += 34;
        return score;
    }
}
