package com.bitcointxoko.gudariwallet.ui

import com.bitcointxoko.gudariwallet.api.LnurlScanResponse
import com.bitcointxoko.gudariwallet.api.PaymentDetailResponse
import com.bitcointxoko.gudariwallet.api.PaymentRecord
import com.bitcointxoko.gudariwallet.api.RouteHintHop
import com.bitcointxoko.gudariwallet.util.RouteHintRisk
import com.bitcointxoko.gudariwallet.util.SendInputType
import java.time.Instant

sealed class UiState<out T> {
    data object Loading                    : UiState<Nothing>()
    data class  Success<T>(val data: T)    : UiState<T>()
    data class  Error(val message: String) : UiState<Nothing>()
}

sealed class ReceiveState {
    data object Idle                       : ReceiveState()
    data object AwaitingInvoice            : ReceiveState()
    data class  InvoiceReady(
        val bolt11      : String,
        val paymentHash : String,
        val amountSats  : Long,
        val memo        : String,
        val expiresAt   : Long
    )                                      : ReceiveState()
    data class  PaymentReceived(
        val amountSats: Long,
        val memo      : String?,
        val checkingId  : String
    )                                      : ReceiveState()
    data class  Error(val message: String) : ReceiveState()
    data class LnurlWithdrawReady(
        val k1                 : String,
        val callback           : String,
        val defaultDescription : String,
        val minSats            : Long,
        val maxSats            : Long,
        val domain             : String,
        val lnurl              : String   // original encoded string, for display
    ) : ReceiveState()
}



sealed class SendState {
    data object Idle                          : SendState()
    data object Scanning                      : SendState()
    data class  Bolt11Decoded(
        override val bolt11            : String,
        override val amountSats        : Long,
        override val memo              : String,
        override val payee             : String?              = null,
        override val nodeAlias         : String?              = null,
        override val routeRisk         : RouteHintRisk?       = null,
        override val allRouteHints     : List<RouteHintHop>   = emptyList(),
        override val routeHintAliases  : Map<String, String>  = emptyMap(),
        override val paymentHash       : String,
        override val createdAt         : Instant,
        override val expiresAt         : Instant
    )                                         : SendState(), DecodedInvoice
    data class  LnurlReady(
        val callback       : String,
        val description    : String,
        val domain         : String,
        val minSats        : Long,
        val maxSats        : Long,
        val commentAllowed : Int,
        val lnurl          : String,
        val rawRes         : LnurlScanResponse
    )                                         : SendState()
    data class  LnurlInvoiceReady(
        override val bolt11            : String,
        override val amountSats        : Long,
        override val memo              : String,
        val domain            : String,
        val lnurl             : String,
        val rawRes            : LnurlScanResponse,
        val amountMsat        : Long,
        val comment           : String?,
        override val payee             : String?             = null,
        override val nodeAlias         : String?             = null,
        override val routeRisk         : RouteHintRisk?      = null,
        override val allRouteHints     : List<RouteHintHop>  = emptyList(),
        override val routeHintAliases  : Map<String, String> = emptyMap(),
        override val paymentHash       : String,
        override val createdAt         : Instant,
        override val expiresAt         : Instant
    )                                         : SendState(), DecodedInvoice
    data object Paying                        : SendState()
    data class  PaymentSent(
        val amountSats : Long,
        val feeSats    : Long? = null,
        val paymentHash: String,
        val pendingRecord: PaymentRecord? = null
    )                                         : SendState()
    data class  Error(val message: String)    : SendState()
}

// ── History list states ────────────────────────────────────────────────────────
sealed interface HistoryState {
    data object Loading : HistoryState
    data class  Success(
        val payments    : List<PaymentRecord>,
        val canLoadMore : Boolean,
        val isRefreshing: Boolean = false
    ) : HistoryState
    data class  Error(val message: String) : HistoryState
}

// ── Payment detail states ──────────────────────────────────────────────────────
sealed interface DetailState {
    data object Idle    : DetailState
    data object Loading : DetailState
    data class  Partial(val record: PaymentRecord)         : DetailState
    data class  Success(val detail: PaymentDetailResponse) : DetailState
    data class  Error(val message: String)                 : DetailState
}

// ── Balance states ─────────────────────────────────────────────────────────────
sealed interface BalanceState {
    data object Loading : BalanceState
    data class  Success(
        val sats        : Long,
        val isRefreshing: Boolean = false,
        val lastUpdated : Long    = System.currentTimeMillis(),
        val fiatAmount   : Double? = null,
        val fiatCurrency : String? = null
    ) : BalanceState
    data class  Error(
        val message  : String,
        val staleSats: Long? = null
    ) : BalanceState
}

// ── Clipboard offer states ─────────────────────────────────────────────────────

sealed interface ClipboardOfferState {
    data object None : ClipboardOfferState
    data class Detected(
        val raw      : String,
        val inputType: SendInputType
    ) : ClipboardOfferState
}


sealed interface NfcOfferState {
    data object None : NfcOfferState
    data class Detected(
        val raw      : String,
        val inputType: SendInputType
    ) : NfcOfferState
}

/**
 * Shared interface for send states that represent a fully decoded invoice
 * ready for user confirmation. Allows ConfirmCardContent to accept either
 * Bolt11Decoded or LnurlInvoiceReady without knowing which it is.
 */
interface DecodedInvoice {
    val amountSats       : Long
    val memo             : String
    val payee            : String?
    val nodeAlias        : String?
    val bolt11           : String
    val routeRisk        : RouteHintRisk?
    val allRouteHints    : List<RouteHintHop>
    val routeHintAliases : Map<String, String>
    val paymentHash     : String
    val createdAt       : Instant
    val expiresAt       : Instant
}