/**
 * Investment Controller
 * Handles investment-related endpoints
 */

import { Request, Response, NextFunction } from 'express';
import { productService, RiskProfile } from '../services/product.service';
import { accountService, CreateAccountInput } from '../services/account.service';
import {
  transactionService,
  TransactionType,
  TransactionStatus,
  WithdrawalStatus,
} from '../services/transaction.service';

// ============================================================================
// Types
// ============================================================================

// Use Request directly - user is already declared globally in auth.middleware.ts
type AuthRequest = Request;

// ============================================================================
// Product Controllers
// ============================================================================

/**
 * Get all investment products
 */
export async function getProducts(req: Request, res: Response, next: NextFunction): Promise<void> {
  try {
    const { riskProfile } = req.query;

    let products;
    if (riskProfile) {
      products = await productService.getProductsByRiskProfile(riskProfile as RiskProfile);
    } else {
      products = await productService.getProducts();
    }

    res.json({
      success: true,
      data: products,
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Get product by ID
 */
export async function getProductById(req: Request, res: Response, next: NextFunction): Promise<void> {
  try {
    const { productId } = req.params;

    const product = await productService.getProductById(productId);
    if (!product) {
      res.status(404).json({
        success: false,
        error: { message: 'Product not found', code: 'NOT_FOUND' },
      });
      return;
    }

    // Get additional stats
    const stats = await productService.getProductStats(productId);

    res.json({
      success: true,
      data: { ...product, stats },
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Get product performance
 */
export async function getProductPerformance(req: Request, res: Response, next: NextFunction): Promise<void> {
  try {
    const { productId } = req.params;
    const { period = 'month' } = req.query;

    const performance = await productService.getProductPerformance(
      productId,
      period as 'week' | 'month' | '3months' | 'year'
    );

    res.json({
      success: true,
      data: performance,
    });
  } catch (error) {
    next(error);
  }
}

// ============================================================================
// Account Controllers
// ============================================================================

/**
 * Get user accounts
 */
export async function getUserAccounts(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const accounts = await accountService.getUserAccounts(userId);

    res.json({
      success: true,
      data: accounts,
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Get account summary
 */
export async function getAccountSummary(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const summary = await accountService.getAccountSummary(userId);

    res.json({
      success: true,
      data: summary,
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Get account by ID
 */
export async function getAccountById(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { accountId } = req.params;

    const account = await accountService.getAccountById(accountId);
    if (!account) {
      res.status(404).json({
        success: false,
        error: { message: 'Account not found', code: 'NOT_FOUND' },
      });
      return;
    }

    if (account.userId !== userId) {
      res.status(403).json({
        success: false,
        error: { message: 'Forbidden', code: 'FORBIDDEN' },
      });
      return;
    }

    // Get performance history
    const performance = await accountService.getAccountPerformance(accountId, 30);

    res.json({
      success: true,
      data: { ...account, performance },
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Create investment account
 */
export async function createAccount(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { productId, initialDeposit } = req.body;

    if (!productId || !initialDeposit) {
      res.status(400).json({
        success: false,
        error: { message: 'Product ID and initial deposit are required', code: 'VALIDATION_ERROR' },
      });
      return;
    }

    const input: CreateAccountInput = {
      userId,
      productId,
      initialDeposit: Number(initialDeposit),
    };

    const account = await accountService.createAccount(input);

    res.status(201).json({
      success: true,
      data: account,
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Close account
 */
export async function closeAccount(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { accountId } = req.params;

    const account = await accountService.getAccountById(accountId);
    if (!account) {
      res.status(404).json({
        success: false,
        error: { message: 'Account not found', code: 'NOT_FOUND' },
      });
      return;
    }

    if (account.userId !== userId) {
      res.status(403).json({
        success: false,
        error: { message: 'Forbidden', code: 'FORBIDDEN' },
      });
      return;
    }

    const closedAccount = await accountService.closeAccount(accountId);

    res.json({
      success: true,
      data: closedAccount,
    });
  } catch (error) {
    next(error);
  }
}

// ============================================================================
// Transaction Controllers
// ============================================================================

/**
 * Get account transactions
 */
export async function getTransactions(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { accountId } = req.params;
    const { type, status, limit = 50, offset = 0 } = req.query;

    const account = await accountService.getAccountById(accountId);
    if (!account) {
      res.status(404).json({
        success: false,
        error: { message: 'Account not found', code: 'NOT_FOUND' },
      });
      return;
    }

    if (account.userId !== userId) {
      res.status(403).json({
        success: false,
        error: { message: 'Forbidden', code: 'FORBIDDEN' },
      });
      return;
    }

    const { transactions, total } = await transactionService.getAccountTransactions(accountId, {
      type: type as TransactionType | undefined,
      status: status as TransactionStatus | undefined,
      limit: Number(limit),
      offset: Number(offset),
    });

    res.json({
      success: true,
      data: transactions,
      pagination: {
        total,
        limit: Number(limit),
        offset: Number(offset),
      },
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Create deposit
 */
export async function createDeposit(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { accountId } = req.params;
    const { amount } = req.body;

    const account = await accountService.getAccountById(accountId);
    if (!account) {
      res.status(404).json({
        success: false,
        error: { message: 'Account not found', code: 'NOT_FOUND' },
      });
      return;
    }

    if (account.userId !== userId) {
      res.status(403).json({
        success: false,
        error: { message: 'Forbidden', code: 'FORBIDDEN' },
      });
      return;
    }

    if (!amount || amount <= 0) {
      res.status(400).json({
        success: false,
        error: { message: 'Valid amount is required', code: 'VALIDATION_ERROR' },
      });
      return;
    }

    const transaction = await transactionService.createDeposit({
      accountId,
      amount: Number(amount),
    });

    res.status(201).json({
      success: true,
      data: transaction,
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Create withdrawal request
 */
export async function createWithdrawal(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { accountId } = req.params;
    const { amount, bankInfo, cryptoInfo } = req.body;

    const account = await accountService.getAccountById(accountId);
    if (!account) {
      res.status(404).json({
        success: false,
        error: { message: 'Account not found', code: 'NOT_FOUND' },
      });
      return;
    }

    if (account.userId !== userId) {
      res.status(403).json({
        success: false,
        error: { message: 'Forbidden', code: 'FORBIDDEN' },
      });
      return;
    }

    if (!amount || amount <= 0) {
      res.status(400).json({
        success: false,
        error: { message: 'Valid amount is required', code: 'VALIDATION_ERROR' },
      });
      return;
    }

    const withdrawal = await transactionService.createWithdrawal(userId, {
      accountId,
      amount: Number(amount),
      bankInfo,
      cryptoInfo,
    });

    res.status(201).json({
      success: true,
      data: withdrawal,
      message: 'Withdrawal request submitted. Processing time: 72 hours.',
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Get user withdrawals
 */
export async function getWithdrawals(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { status } = req.query;

    const withdrawals = await transactionService.getUserWithdrawals(
      userId,
      status as WithdrawalStatus | undefined
    );

    res.json({
      success: true,
      data: withdrawals,
    });
  } catch (error) {
    next(error);
  }
}

/**
 * Get account distributions
 */
export async function getDistributions(req: AuthRequest, res: Response, next: NextFunction): Promise<void> {
  try {
    const userId = req.user?.id;
    if (!userId) {
      res.status(401).json({
        success: false,
        error: { message: 'Unauthorized', code: 'UNAUTHORIZED' },
      });
      return;
    }

    const { accountId } = req.params;

    const account = await accountService.getAccountById(accountId);
    if (!account) {
      res.status(404).json({
        success: false,
        error: { message: 'Account not found', code: 'NOT_FOUND' },
      });
      return;
    }

    if (account.userId !== userId) {
      res.status(403).json({
        success: false,
        error: { message: 'Forbidden', code: 'FORBIDDEN' },
      });
      return;
    }

    const distributions = await transactionService.getAccountDistributions(accountId);

    res.json({
      success: true,
      data: distributions,
    });
  } catch (error) {
    next(error);
  }
}