/**
 * Format a date string or Date to a long readable date: "Jan 6, 2026"
 */
export function formatDate(value?: string | Date | null): string {
    if (!value) return "—"
    const date = value instanceof Date ? value : new Date(value)
    if (isNaN(date.getTime())) return "—"
    return date.toLocaleDateString(undefined, { year: "numeric", month: "short", day: "numeric" })
}

/**
 * Format a date string or Date to date + time: "Jan 6, 2026, 2:30 PM"
 */
export function formatDateTime(value?: string | Date | null): string {
    if (!value) return "—"
    const date = value instanceof Date ? value : new Date(value)
    if (isNaN(date.getTime())) return "—"
    return date.toLocaleDateString(undefined, {
        year: "numeric",
        month: "short",
        day: "numeric",
        hour: "numeric",
        minute: "2-digit",
    })
}

/**
 * Format a date string or Date to a short numeric date: "04/06/2026"
 */
export function formatDateShort(value?: string | Date | null): string {
    if (!value) return "—"
    const date = value instanceof Date ? value : new Date(value)
    if (isNaN(date.getTime())) return "—"
    return date.toLocaleDateString(undefined, { year: "numeric", month: "2-digit", day: "2-digit" })
}

/**
 * Format a time string or Date to a readable time: "2:30 PM"
 */
export function formatTime(value?: string | Date | null): string {
    if (!value) return "—"
    const date = value instanceof Date ? value : new Date(value)
    if (isNaN(date.getTime())) return "—"
    return date.toLocaleTimeString(undefined, { hour: "numeric", minute: "2-digit" })
}

/**
 * Format a snake_case or underscore-separated string to Title Case words.
 * e.g. "in_progress" → "In Progress"
 */
export function formatEnum(value?: string | null): string {
    if (!value) return "—"
    return value
        .split("_")
        .map((w) => w.charAt(0).toUpperCase() + w.slice(1))
        .join(" ")
}

/**
 * Format a number with locale-aware thousand separators.
 * e.g. 150000 → "150,000"
 */
export function formatNumber(value?: number | string | null): string {
    if (value == null || value === "") return "—"
    const num = typeof value === "string" ? Number(value) : value
    if (isNaN(num)) return "—"
    return num.toLocaleString()
}

/**
 * Format a numeric value as currency: "$1,500.00"
 */
export function formatCurrency(
    value?: number | string | null,
    currency = "USD",
    locale?: string,
): string {
    if (value == null || value === "") return "—"
    const num = typeof value === "string" ? Number(value) : value
    if (isNaN(num)) return "—"
    return new Intl.NumberFormat(locale, { style: "currency", currency }).format(num)
}