// Synthetic Liquidity Systems Service
// GSE, GLP, ID-SLG, TRLM with 3D liquidity tensor

import prisma from '@/shared/database/prisma';
import { Decimal } from '@prisma/client/runtime/library';
import { v4 as uuidv4 } from 'uuid';
import { logger } from '@/infrastructure/monitoring/logger';


export type LiquidityEngineType = 'GSE' | 'GLP' | 'ID-SLG' | 'TRLM';
export type LiquidityOperationType = 'swap' | 'contribution' | 'withdrawal' | 'rebalance';

export interface CreateLiquidityEngineRequest {
  engineType: LiquidityEngineType;
  engineName: string;
  description: string;
  commodityVector?: Record<string, any>;
  fxVector?: Record<string, any>;
  temporalVector?: Record<string, any>;
}

export interface LiquidityOperationRequest {
  engineId: string;
  operationType: LiquidityOperationType;
  amount: string;
  sourceAsset?: string;
  targetAsset?: string;
}

export interface LiquidityTensorRequest {
  engineId: string;
  commodityIndex: number;
  fxIndex: number;
  temporalIndex: number;
  liquidityValue: string;
  metadata?: Record<string, any>;
}

export class SyntheticLiquidityService {
  /**
   * Create liquidity engine
   */
  async createEngine(request: CreateLiquidityEngineRequest): Promise<string> {
    logger.info('GRU: Creating liquidity engine', { request });

    const engineId = `ENGINE-${request.engineType}-${uuidv4()}`;

    const engine = await prisma.synthetic_liquidity_engines.create({
      data: {
        engineId,
        engineType: request.engineType,
        engineName: request.engineName,
        description: request.description,
        commodityVector: request.commodityVector ? JSON.stringify(request.commodityVector) : null,
        fxVector: request.fxVector ? JSON.stringify(request.fxVector) : null,
        temporalVector: request.temporalVector ? JSON.stringify(request.temporalVector) : null,
        status: 'active',
        lastUpdated: new Date(),
      },
    });

    logger.info('GRU: Liquidity engine created', { engineId });

    return engineId;
  }

  /**
   * Execute liquidity operation
   */
  async executeOperation(request: LiquidityOperationRequest): Promise<string> {
    logger.info('GRU: Executing liquidity operation', { request });

    const engine = await prisma.synthetic_liquidity_engines.findUnique({
      where: { engineId: request.engineId },
    });

    if (!engine) {
      throw new Error(`Liquidity engine not found: ${request.engineId}`);
    }

    const operationId = `OP-${uuidv4()}`;
    const amount = new Decimal(request.amount);

    // Update engine liquidity based on operation type
    let totalLiquidity = engine.totalLiquidity;
    let availableLiquidity = engine.availableLiquidity;
    let reservedLiquidity = engine.reservedLiquidity;

    switch (request.operationType) {
      case 'contribution':
        totalLiquidity = totalLiquidity.plus(amount);
        availableLiquidity = availableLiquidity.plus(amount);
        break;
      case 'withdrawal':
        if (availableLiquidity.lt(amount)) {
          throw new Error('Insufficient available liquidity');
        }
        availableLiquidity = availableLiquidity.minus(amount);
        totalLiquidity = totalLiquidity.minus(amount);
        break;
      case 'swap':
        // Swap operations maintain total liquidity
        break;
      case 'rebalance':
        // Rebalancing operations
        break;
    }

    // Create operation record
    const operation = await prisma.liquidityOperation.create({
      data: {
        operationId,
        engineId: request.engineId,
        operationType: request.operationType,
        amount,
        sourceAsset: request.sourceAsset,
        targetAsset: request.targetAsset,
        status: 'completed',
        executedAt: new Date(),
      },
    });

    // Update engine
    await prisma.synthetic_liquidity_engines.update({
      where: { engineId: request.engineId },
      data: {
        totalLiquidity,
        availableLiquidity,
        reservedLiquidity,
        lastUpdated: new Date(),
      },
    });

    logger.info('GRU: Liquidity operation executed', { operationId });

    return operationId;
  }

  /**
   * Create liquidity tensor entry
   */
  async createTensorEntry(request: LiquidityTensorRequest): Promise<string> {
    logger.info('GRU: Creating liquidity tensor entry', { request });

    const engine = await prisma.synthetic_liquidity_engines.findUnique({
      where: { engineId: request.engineId },
    });

    if (!engine) {
      throw new Error(`Liquidity engine not found: ${request.engineId}`);
    }

    const tensorId = `TENSOR-${uuidv4()}`;

    const tensor = await prisma.liquidity_tensors.create({
      data: {
        tensorId,
        engineId: request.engineId,
        commodityIndex: request.commodityIndex,
        fxIndex: request.fxIndex,
        temporalIndex: request.temporalIndex,
        liquidityValue: new Decimal(request.liquidityValue),
        metadata: request.metadata ? JSON.stringify(request.metadata) : null,
        timestamp: new Date(),
      },
    });

    logger.info('GRU: Liquidity tensor entry created', { tensorId });

    return tensorId;
  }

  /**
   * Get engine by ID
   */
  async getEngine(engineId: string) {
    return await prisma.synthetic_liquidity_engines.findUnique({
      where: { engineId },
      include: {
        liquidityOperations: {
          take: 50,
          orderBy: { createdAt: 'desc' },
        },
        tensorStates: {
          take: 100,
          orderBy: { timestamp: 'desc' },
        },
      },
    });
  }

  /**
   * Get all engines by type
   */
  async getEnginesByType(engineType: LiquidityEngineType) {
    return await prisma.synthetic_liquidity_engines.findMany({
      where: {
        engineType,
        status: 'active',
      },
      include: {
        liquidityOperations: {
          take: 10,
          orderBy: { createdAt: 'desc' },
        },
      },
    });
  }

  /**
   * Calculate total liquidity across all engines
   */
  async getTotalLiquidity(): Promise<Decimal> {
    const engines = await prisma.synthetic_liquidity_engines.findMany({
      where: { status: 'active' },
    });

    let total = new Decimal(0);
    for (const engine of engines) {
      total = total.plus(engine.totalLiquidity);
    }

    return total;
  }

  /**
   * Get liquidity tensor state
   */
  async getTensorState(engineId: string, commodityIndex: number, fxIndex: number, temporalIndex: number) {
    return await prisma.liquidity_tensors.findFirst({
      where: {
        engineId,
        commodityIndex,
        fxIndex,
        temporalIndex,
      },
      orderBy: { timestamp: 'desc' },
    });
  }
}

export const syntheticLiquidityService = new SyntheticLiquidityService();

