package application

import (
	"context"
	"time"

	"git.coopgo.io/coopgo-platform/mobility-accounts/grpcapi"
	mobilityaccountsstorage "git.coopgo.io/coopgo-platform/mobility-accounts/storage"
	"github.com/rs/zerolog/log"
)

func (h *ApplicationHandler) CreditWallet(ctx context.Context, userid string, amount float64, paymentMethod string, description string) error {
	account, err := h.services.GetAccount(userid)
	if err != nil {
		log.Error().Err(err).Msg("could not retrieve account")
		return err
	}

	// Initialize wallet if it doesn't exist
	if account.Data["wallet"] == nil {
		account.Data["wallet"] = float64(0)
	}

	// Initialize wallet history if it doesn't exist
	if account.Data["wallet_history"] == nil {
		account.Data["wallet_history"] = []map[string]interface{}{}
	}

	// Determine operation type based on amount sign
	operationType := "credit"
	if amount < 0 {
		operationType = "debit"
	}

	// Create wallet operation record
	operation := map[string]interface{}{
		"timestamp":      time.Now().Format(time.RFC3339),
		"amount":         amount,
		"payment_method": paymentMethod,
		"description":    description,
		"operation_type": operationType,
	}

	// Add operation to history
	var history []map[string]interface{}
	if existingHistory, ok := account.Data["wallet_history"].([]interface{}); ok {
		// Convert []interface{} to []map[string]interface{}
		for _, item := range existingHistory {
			if historyItem, ok := item.(map[string]interface{}); ok {
				history = append(history, historyItem)
			}
		}
	} else if existingHistory, ok := account.Data["wallet_history"].([]map[string]interface{}); ok {
		history = existingHistory
	}

	history = append(history, operation)
	account.Data["wallet_history"] = history

	log.Debug().
		Str("userid", userid).
		Float64("amount", amount).
		Str("paymentMethod", paymentMethod).
		Str("description", description).
		Int("historyCount", len(history)).
		Msg("Adding operation to wallet history")

	// Note: wallet balance is NOT updated here - it remains as initial amount
	// Balance is calculated from initial amount + sum of all operations

	accountproto, err := grpcapi.AccountFromStorageType(&account)
	if err != nil {
		log.Error().Err(err).Msg("account type transformation issue")
		return err
	}

	_, err = h.services.GRPC.MobilityAccounts.UpdateData(ctx, &grpcapi.UpdateDataRequest{
		Account: accountproto,
	})
	if err != nil {
		log.Error().Err(err).Msg("account update issue")
		return err
	}

	log.Info().
		Str("userid", userid).
		Float64("amount", amount).
		Str("payment_method", paymentMethod).
		Str("description", description).
		Msg("Wallet credited successfully")

	return nil
}

// calculateWalletBalance calculates the current wallet balance from initial amount + all operations
func (h *ApplicationHandler) calculateWalletBalance(account mobilityaccountsstorage.Account) float64 {
	// Return 0 if account data is nil
	if account.Data == nil {
		log.Debug().Msg("calculateWalletBalance: account.Data is nil, returning 0")
		return float64(0)
	}

	// Get initial wallet amount (default to 0 if not set)
	initialAmount := float64(0)
	if walletValue, exists := account.Data["wallet"]; exists && walletValue != nil {
		if val, ok := walletValue.(float64); ok {
			initialAmount = val
		}
	}

	// Calculate total from all operations
	operationsTotal := float64(0)
	operationCount := 0
	if historyValue, exists := account.Data["wallet_history"]; exists && historyValue != nil {
		var operations []map[string]interface{}

		// Handle both []interface{} and []map[string]interface{} types
		if history, ok := historyValue.([]interface{}); ok {
			for _, item := range history {
				if operation, ok := item.(map[string]interface{}); ok {
					operations = append(operations, operation)
				}
			}
		} else if history, ok := historyValue.([]map[string]interface{}); ok {
			operations = history
		}

		for _, operation := range operations {
			if amount, ok := operation["amount"].(float64); ok {
				operationsTotal += amount
				operationCount++
			}
		}
	}

	result := initialAmount + operationsTotal
	log.Debug().
		Str("accountId", account.ID).
		Float64("initialAmount", initialAmount).
		Float64("operationsTotal", operationsTotal).
		Int("operationCount", operationCount).
		Float64("result", result).
		Msg("calculateWalletBalance")

	return result
}