package com.iiyh.emoneyinfo.data

import androidx.annotation.StringRes
import com.iiyh.emoneyinfo.R
import java.text.NumberFormat
import java.text.SimpleDateFormat
import java.util.Date
import java.util.Locale
import kotlin.math.abs

enum class CardType(@param:StringRes val labelRes: Int) {
    UNKNOWN(R.string.card_unknown),
    MANDIRI(R.string.card_mandiri),
    FLAZZ(R.string.card_flazz),
    BRIZZI(R.string.card_brizzi),
    TAPCASH(R.string.card_tapcash),
    JACKCARD(R.string.card_jackcard),
    MEGACASH(R.string.card_megacash),
    KMT(R.string.card_kmt)
}

data class TransactionItem(
    val title: String,
    val date: Date,
    val amount: Long,
    val isCredit: Boolean,
    val locationName: String = ""
) {
    fun formattedAmount(): String {
        val formatter = NumberFormat.getCurrencyInstance(Locale.forLanguageTag("id-ID")).apply {
            maximumFractionDigits = 0
            currency = java.util.Currency.getInstance("IDR")
        }
        val raw = formatter.format(abs(amount)).replace("IDR", "Rp")
        return if (isCredit) "+$raw" else "-$raw"
    }

    fun formattedDate(): String = SimpleDateFormat("dd MMM yyyy · HH:mm", Locale.forLanguageTag("id-ID")).format(date)

    fun subtitle(): String = buildString {
        append(formattedDate())
        if (locationName.isNotBlank()) {
            append(" · ")
            append(locationName)
        }
    }

    fun historyKey(): String = buildString {
        append(date.time / 1000)
        append('|')
        append(amount)
        append('|')
        append(if (isCredit) 1 else 0)
        append('|')
        append(locationName.trim())
        append('|')
        append(title)
    }
}

data class EmoneyUiState(
    val cardType: CardType = CardType.UNKNOWN,
    val balance: Long = 0,
    val cardNumber: String = "",
    val transactions: List<TransactionItem> = emptyList(),
    val scanMessage: String = "",
    val isNfcSupported: Boolean = true
) {
    fun formattedBalance(): String {
        val formatter = NumberFormat.getCurrencyInstance(Locale.forLanguageTag("id-ID")).apply {
            maximumFractionDigits = 0
            currency = java.util.Currency.getInstance("IDR")
        }
        return formatter.format(balance).replace("IDR", "Rp")
    }

    fun hasCardData(): Boolean = cardType != CardType.UNKNOWN || cardNumber.isNotBlank() || balance > 0 || transactions.isNotEmpty()

    fun clearingHistory(scanMessage: String): EmoneyUiState = copy(
        transactions = emptyList(),
        scanMessage = scanMessage
    )

    fun deduplicatingHistory(): EmoneyUiState {
        val deduplicated = transactions.distinctBy { it.historyKey() }
        return if (deduplicated.size == transactions.size) this else copy(transactions = deduplicated)
    }
}

fun String.formatCardNumber(): String {
    val digits = filter { it.isDigit() }
    if (digits.isEmpty()) return this
    return digits.chunked(4).joinToString(" ")
}

fun String.maskFirst12(): String {
    val digits = filter { it.isDigit() }
    if (digits.length != 16) return formatCardNumber()
    return "**** **** **** ${digits.takeLast(4)}"
}