import SwiftUI

struct SentGiftDetailContentView: View {
    let model: SentGiftDetailDisplayModel

    var body: some View {
        VStack(alignment: .leading, spacing: SodaSpacing.s32) {
            hero

            if model.status == .undeliverable {
                undeliverableReason
            } else if model.status != .canceled {
                GiftProgressView(progress: model.progress)
            }

            if model.status == .received {
                mailbox
            }

            giftInfo
            sender

            if model.status != .received {
                mailbox
            }
        }
        .frame(maxWidth: .infinity, alignment: .leading)
    }

    private var hero: some View {
        VStack(alignment: .leading, spacing: SodaSpacing.s14) {
            if let statusLabel {
                Text(statusLabel)
                    .appFont(.caption2)
                    .foregroundColor(model.status == .undeliverable ? .red400 : .soda400)
                    .padding(.horizontal, SodaSpacing.s8)
                    .padding(.vertical, SodaSpacing.s4)
                    .background(Color.gray900)
                    .clipShape(RoundedRectangle(cornerRadius: SodaRadius.r4))
            }

            Text(heroTitle)
                .appFont(.heading1)
                .foregroundColor(.white)
                .accessibilityAddTraits(.isHeader)

            if let heroBody {
                Text(heroBody)
                    .appFont(.body6)
                    .foregroundColor(.gray500)
            }
        }
        .fixedSize(horizontal: false, vertical: true)
        .frame(maxWidth: .infinity, alignment: .leading)
    }

    private var statusLabel: String? {
        switch model.status {
        case .trackingRegistered: return "발송 확인"
        case .delivered: return "전달 완료"
        case .undeliverable: return "전달 불가"
        case .received, .arrivedAtMailbox, .inspectionCompleted, .canceled: return nil
        }
    }

    private var heroTitle: String {
        switch model.status {
        case .received: return "선물 신청 완료!"
        case .trackingRegistered: return "사서함으로 이동 중이에요"
        case .delivered: return "크리에이터에게 선물을 전달했어요"
        case .undeliverable: return "전달할 수 없는 품목입니다"
        case .arrivedAtMailbox, .inspectionCompleted, .canceled: return model.statusName
        }
    }

    private var heroBody: String? {
        switch model.status {
        case .received:
            return "선물이 정상적으로 접수되었어요!"
        case .undeliverable:
            return "보내주신 선물은 소다라이브 선물 정책에 따라 크리에이터에게 전달할 수 없는 품목으로 확인되었습니다."
        case .trackingRegistered, .arrivedAtMailbox, .inspectionCompleted, .delivered, .canceled:
            return nil
        }
    }

    private var giftInfo: some View {
        GiftInfoSectionView(title: "선물 정보") {
            if let nickname = model.recipientCreatorNickname {
                GiftInfoRow(title: "크리에이터", value: nickname)
            }
            GiftInfoRow(title: "선물 사이즈", value: model.sizeName)
            GiftInfoRow(title: "카테고리", value: model.categoryName)
            GiftInfoRow(title: "신청번호", value: model.applicationNo)
            if let paidCan = model.paidCan {
                GiftInfoRow(title: "캔", value: String(paidCan))
            }
            if let tracking = model.tracking,
               !tracking.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
                GiftInfoRow(title: "운송장 번호", value: tracking)
            }
        }
    }

    @ViewBuilder
    private var sender: some View {
        if let sender = model.senderInfo {
            GiftInfoSectionView(title: "보내는 사람") {
                GiftInfoRow(title: "이름", value: sender.name)
                GiftInfoRow(title: "휴대폰 번호", value: sender.phoneNumber)
                GiftInfoRow(title: "주소", value: sender.address)
            }
        }
    }

    @ViewBuilder
    private var mailbox: some View {
        if let mailbox = model.mailbox {
            GiftInfoSectionView(title: model.status == .received ? "보내실 주소" : "받는 사서함") {
                GiftInfoRow(title: "사서함", value: mailbox.name)
                GiftInfoRow(title: "주소", value: mailbox.address)
                GiftInfoRow(title: "연락처", value: mailbox.phoneNumber)
            }
        }
    }

    private var undeliverableReason: some View {
        GiftInfoSectionView(title: "사유") {
            if let reason = model.undeliverableReason?.trimmingCharacters(in: .whitespacesAndNewlines),
               !reason.isEmpty {
                Text(reason)
                    .appFont(.body6)
                    .foregroundColor(.white)
                    .fixedSize(horizontal: false, vertical: true)
                    .frame(maxWidth: .infinity, alignment: .leading)

                Divider()
                    .overlay(Color.gray800)
                    .accessibilityHidden(true)
            }

            Text("해당 선물은 보관기간(입고일 포함 최대 7일) 내에 반송 등 필요한 조치가 완료되지 않을 경우, 사전에 동의한 약관 및 폐기 등의 내용에 따라 폐기될 수 있습니다. 자세한 내용은 고객센터로 문의해 주세요.")
                .appFont(.body6)
                .foregroundColor(.red400)
                .fixedSize(horizontal: false, vertical: true)
                .frame(maxWidth: .infinity, alignment: .leading)
        }
    }
}