/**
 * Utility functions for currency/decimal formatting and parsing
 */

type CurrencyFormatOptions = {
	maximumFractionDigits?: number;
	minimumFractionDigits?: number;
	notation?: Intl.NumberFormatOptions["notation"];
};

export const currencyFormatter = new Intl.NumberFormat("pt-BR", {
	style: "currency",
	currency: "BRL",
	minimumFractionDigits: 2,
	maximumFractionDigits: 2,
});

export const currencyFormatterNoCents = new Intl.NumberFormat("pt-BR", {
	style: "currency",
	currency: "BRL",
	minimumFractionDigits: 0,
	maximumFractionDigits: 0,
});

export const formatCurrency = (
	value: number,
	options: CurrencyFormatOptions = {},
) =>
	new Intl.NumberFormat("pt-BR", {
		style: "currency",
		currency: "BRL",
		minimumFractionDigits: options.minimumFractionDigits ?? 2,
		maximumFractionDigits: options.maximumFractionDigits ?? 2,
		...(options.notation ? { notation: options.notation } : {}),
	}).format(value);

export const formatCurrencyCompact = (
	value: number,
	options: CurrencyFormatOptions = {},
) =>
	formatCurrency(value, {
		minimumFractionDigits: options.minimumFractionDigits ?? 0,
		maximumFractionDigits: options.maximumFractionDigits ?? 0,
		notation: options.notation ?? "compact",
	});

/**
 * Formats a decimal number for database storage (2 decimal places)
 * @param value - The number to format
 * @returns Formatted string with 2 decimal places, or null if input is null
 */
export function formatDecimalForDb(value: number | null): string | null {
	if (value === null) {
		return null;
	}

	return (Math.round(value * 100) / 100).toFixed(2);
}

/**
 * Formats a decimal number for database storage (non-nullable version)
 * @param value - The number to format
 * @returns Formatted string with 2 decimal places
 */
export function formatDecimalForDbRequired(value: number): string {
	return (Math.round(value * 100) / 100).toFixed(2);
}

/**
 * Normalizes decimal input by replacing comma with period
 * @param value - Input string
 * @returns Normalized string with period as decimal separator
 */
export function normalizeDecimalInput(value: string): string {
	return value.replace(/\s/g, "").replace(",", ".");
}

/**
 * Formats a limit/balance input for display
 * @param value - The number to format
 * @returns Formatted string or empty string
 */
export function formatLimitInput(value?: number | null): string {
	if (value === null || value === undefined || Number.isNaN(value)) {
		return "";
	}

	return (Math.round(value * 100) / 100).toFixed(2);
}

/**
 * Formats an initial balance input for display (defaults to "0.00")
 * @param value - The number to format
 * @returns Formatted string with default "0.00"
 */
export function formatInitialBalanceInput(value?: number | null): string {
	if (value === null || value === undefined || Number.isNaN(value)) {
		return "0.00";
	}

	return (Math.round(value * 100) / 100).toFixed(2);
}