package com.bitcointxoko.gudariwallet.util

import timber.log.Timber
import java.time.Instant
import java.time.ZoneId
import java.time.format.DateTimeFormatter
import java.time.format.FormatStyle

// ── Epoch formatters ──────────────────────────────────────────────────────────
//
// All formatters are built on each call so that ZoneId.systemDefault() and the
// current locale are always fresh (a file-level val would capture them once at
// class-load time and become stale after a timezone/locale change).

/**
 * "dd MMM"  — e.g. "09 Jun"
 * Suitable for compact list labels.
 */
fun formatEpochShort(epochSeconds: Long): String =
    DateTimeFormatter.ofPattern("dd MMM")
        .withZone(ZoneId.systemDefault())
        .format(Instant.ofEpochSecond(epochSeconds))

/**
 * "dd MMM yyyy, HH:mm"  — e.g. "09 Jun 2025, 14:32"
 * Accepts either a numeric epoch-seconds value or an ISO offset-date-time string
 * as [rawTime] fallback (for payments not yet persisted through Room).
 */
fun formatTimestamp(createdAt: Long?, rawTime: String): String {
    val formatter = DateTimeFormatter
        .ofPattern("dd MMM yyyy, HH:mm")
        .withZone(ZoneId.systemDefault())
    if (createdAt != null && createdAt > 1_000_000_000L) {
        return formatter.format(Instant.ofEpochSecond(createdAt))
    }
    return runCatching {
        formatter.format(Instant.ofEpochSecond(rawTime.toLong()))
    }.recoverCatching {
        formatter.format(java.time.OffsetDateTime.parse(rawTime))
    }.getOrDefault(rawTime)
}

/**
 * Localized SHORT date-time — e.g. "6/9/25, 2:32 PM" (locale-dependent).
 * Returns "—" for out-of-range epoch values; callers should handle sentinel
 * values (e.g. 0L = "never expires") before calling this.
 */
fun formatEpoch(epochSeconds: Long): String =
    try {
        DateTimeFormatter
            .ofLocalizedDateTime(FormatStyle.SHORT)
            .withZone(ZoneId.systemDefault())
            .format(Instant.ofEpochSecond(epochSeconds))
    } catch (e: Exception) {
        Timber.tag("DateTimeUtils").w(e, "formatEpoch: could not format epochSeconds=$epochSeconds")
        "—"
    }