from djmoney.money import Money
from decimal import Decimal
from apps.tasrif.models import CurrencyRate

def convert_currency_pure(from_rate, to_rate, amount):
    
    converted_amount = (amount / from_rate.rate) * to_rate.rate

    if to_rate.code == "IRR":
        converted_amount = round(converted_amount)

    one_unit_conversion = to_rate.rate / from_rate.rate

    return converted_amount, one_unit_conversion
    
def convert_currency(amount, from_currency_code, to_currency_code):
    try:
        from_currency_rate = CurrencyRate.objects.get(code=from_currency_code)
        to_currency_rate = CurrencyRate.objects.get(code=to_currency_code)

        # مطمئن شدن از نوع داده Decimal برای نرخ‌ها
        from_rate = Decimal(to_currency_rate.rate)
        to_rate = Decimal(from_currency_rate.rate)
        
        # محاسبه نرخ تبدیل
        conversion_rate = from_rate / to_rate

        # تبدیل مبلغ
        converted_amount = Decimal(amount) * conversion_rate
            
        # ایجاد نمونه Money
        converted_money = Money(converted_amount, to_currency_code)
        print(f'>>>>>>>>> {converted_amount} /// {converted_money}')
        return converted_money
    except CurrencyRate.DoesNotExist:
        return None  # یا می‌توانید خطا را مدیریت کنید
    
    
def convert_currency2(from_currency_code, to_currency_code, amount):
    try:
        # Fetch the currencies from the database
        from_currency = CurrencyRate.objects.get(code=from_currency_code)
        to_currency = CurrencyRate.objects.get(code=to_currency_code)
        
        # Convert the amount to USD first, then to the target currency
        amount_in_usd = amount / from_currency.rate
        converted_amount = amount_in_usd * to_currency.rate
        
        # Ensure IRR values are integer if converting to IRR
        if to_currency_code == 'IRR':
            converted_amount = round(converted_amount)
        
        return converted_amount
    
    except CurrencyRate.DoesNotExist:
        raise ValueError("One or both of the specified currencies are not available in the database.")
    
    
def formater_convert_currency(to_currency, converted_amount, rate_per_unit):
    if to_currency == 'IRR':
        # Format without decimals for IRR
        formatted_converted_amount = f"{converted_amount:,.0f}"  # No decimal places
        formatted_rate_per_unit = f"{rate_per_unit:,.0f}"
    else:
        # Format with two decimal places for other currencies
        formatted_converted_amount = f"{converted_amount:,.2f}"  # Two decimal places
        formatted_rate_per_unit = f"{rate_per_unit:,.2f}"

    return formatted_converted_amount, formatted_rate_per_unit