//
//  OfflineCollectionHomeView.swift
//  suixinkan
//

import SnapKit
import UIKit

/// 收款首页中的线下收款入口、今日汇总和历史逾期提醒区域。
final class OfflineCollectionHomeView: UIView {
    var onRegister: (() -> Void)?
    var onOpenToday: (() -> Void)?
    var onOpenOverdue: (() -> Void)?

    private let contentStack = UIStackView()
    private let sectionTitleLabel = UILabel()

    private let overdueControl = UIControl()
    private let overdueTitleLabel = UILabel()
    private let overdueDetailLabel = UILabel()
    private let overdueActionLabel = UILabel()

    private let registerControl = UIControl()
    private let registerIconView = UIImageView()
    private let registerTitleLabel = UILabel()
    private let registerSubtitleLabel = UILabel()
    private let registerActionLabel = UILabel()

    private let summaryControl = UIControl()
    private let summaryTitleLabel = UILabel()
    private let summaryAmountLabel = UILabel()
    private let summaryCountLabel = UILabel()
    private let summaryRegisteredLabel = UILabel()
    private let summaryStatusLabel = UILabel()
    private let summaryActionLabel = UILabel()

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()
        setupConstraints()
        bindActions()
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    /// 根据今日与历史逾期汇总刷新页面内容。
    func apply(
        today: OfflineDailySummary,
        overdueDayCount: Int,
        overdueRecordCount: Int,
        overdueAmountFen: Int
    ) {
        let hasOverdue = overdueDayCount > 0 && overdueAmountFen > 0
        overdueControl.isHidden = !hasOverdue
        overdueDetailLabel.text = "\(overdueDayCount) 个营业日，共 \(overdueRecordCount) 笔，待补缴 \(OfflineCollectionMoney.display(overdueAmountFen))"

        summaryAmountLabel.text = OfflineCollectionMoney.display(today.pendingAmountFen)
        summaryCountLabel.text = "\(today.pendingCount) 笔线下收款"
        summaryRegisteredLabel.text = "今日已登记 \(OfflineCollectionMoney.display(today.totalAmountFen))"
        let isSettled = today.totalCount > 0 && today.pendingAmountFen == 0
        summaryStatusLabel.text = isSettled ? "今日已结清" : ""
        summaryStatusLabel.isHidden = !isSettled
        summaryActionLabel.text = today.pendingAmountFen > 0 ? "去补缴" : "查看明细"
        summaryActionLabel.backgroundColor = today.pendingAmountFen > 0
            ? AppColor.primary
            : UIColor(hex: 0xEEF2F7)
        summaryActionLabel.textColor = today.pendingAmountFen > 0
            ? .white
            : AppColor.textSecondary
    }

    private func setupUI() {
        backgroundColor = .clear

        contentStack.axis = .vertical
        contentStack.spacing = AppSpacing.md

        sectionTitleLabel.text = "线下收款"
        sectionTitleLabel.font = .systemFont(ofSize: 16, weight: .semibold)
        sectionTitleLabel.textColor = AppColor.textPrimary

        configureCard(overdueControl, backgroundColor: UIColor(hex: 0xFFF1F0))
        overdueControl.layer.borderColor = UIColor(hex: 0xFFCCC7).cgColor
        overdueControl.layer.borderWidth = 1
        overdueTitleLabel.text = "存在逾期未补缴"
        overdueTitleLabel.font = .systemFont(ofSize: 15, weight: .semibold)
        overdueTitleLabel.textColor = AppColor.danger
        overdueDetailLabel.font = .systemFont(ofSize: 13)
        overdueDetailLabel.textColor = UIColor(hex: 0x8C2F27)
        overdueDetailLabel.numberOfLines = 0
        configureActionLabel(overdueActionLabel, title: "立即处理", background: AppColor.danger, foreground: .white)

        configureCard(registerControl, backgroundColor: .white)
        registerIconView.image = UIImage(systemName: "plus.circle.fill")
        registerIconView.tintColor = AppColor.primary
        registerIconView.contentMode = .scaleAspectFit
        registerTitleLabel.text = "线下收款登记"
        registerTitleLabel.font = .systemFont(ofSize: 16, weight: .semibold)
        registerTitleLabel.textColor = AppColor.textPrimary
        registerSubtitleLabel.text = "线下收款后，请及时登记并在当日完成补缴"
        registerSubtitleLabel.font = .systemFont(ofSize: 13)
        registerSubtitleLabel.textColor = AppColor.textSecondary
        registerSubtitleLabel.numberOfLines = 0
        configureActionLabel(registerActionLabel, title: "去登记", background: UIColor(hex: 0xEEF5FF), foreground: AppColor.primary)

        configureCard(summaryControl, backgroundColor: .white)
        summaryTitleLabel.text = "今日待补缴"
        summaryTitleLabel.font = .systemFont(ofSize: 15, weight: .semibold)
        summaryTitleLabel.textColor = AppColor.textPrimary
        summaryAmountLabel.font = .systemFont(ofSize: 30, weight: .bold)
        summaryAmountLabel.textColor = AppColor.textPrimary
        summaryCountLabel.font = .systemFont(ofSize: 13)
        summaryCountLabel.textColor = UIColor(hex: 0xD97706)
        summaryRegisteredLabel.font = .systemFont(ofSize: 13)
        summaryRegisteredLabel.textColor = AppColor.textSecondary
        summaryStatusLabel.font = .systemFont(ofSize: 13, weight: .semibold)
        summaryStatusLabel.textColor = AppColor.success
        configureActionLabel(summaryActionLabel, title: "查看明细", background: UIColor(hex: 0xEEF2F7), foreground: AppColor.textSecondary)

        addSubview(contentStack)
        [sectionTitleLabel, overdueControl, registerControl, summaryControl].forEach(contentStack.addArrangedSubview)

        let overdueTextStack = UIStackView(arrangedSubviews: [overdueTitleLabel, overdueDetailLabel])
        overdueTextStack.axis = .vertical
        overdueTextStack.spacing = 5
        overdueControl.addSubview(overdueTextStack)
        overdueControl.addSubview(overdueActionLabel)

        let registerTextStack = UIStackView(arrangedSubviews: [registerTitleLabel, registerSubtitleLabel])
        registerTextStack.axis = .vertical
        registerTextStack.spacing = 5
        registerControl.addSubview(registerIconView)
        registerControl.addSubview(registerTextStack)
        registerControl.addSubview(registerActionLabel)

        let summaryTextStack = UIStackView(arrangedSubviews: [
            summaryTitleLabel,
            summaryAmountLabel,
            summaryCountLabel,
            summaryRegisteredLabel,
            summaryStatusLabel,
        ])
        summaryTextStack.axis = .vertical
        summaryTextStack.spacing = 6
        summaryControl.addSubview(summaryTextStack)
        summaryControl.addSubview(summaryActionLabel)
    }

    private func setupConstraints() {
        contentStack.snp.makeConstraints { make in
            make.edges.equalToSuperview()
        }
        sectionTitleLabel.snp.makeConstraints { make in
            make.height.equalTo(24)
        }

        overdueControl.snp.makeConstraints { make in
            make.height.greaterThanOrEqualTo(84)
        }
        overdueControl.subviews.first?.snp.makeConstraints { make in
            make.leading.top.bottom.equalToSuperview().inset(AppSpacing.md)
            make.trailing.lessThanOrEqualTo(overdueActionLabel.snp.leading).offset(-AppSpacing.sm)
        }
        overdueActionLabel.snp.makeConstraints { make in
            make.trailing.equalToSuperview().inset(AppSpacing.md)
            make.centerY.equalToSuperview()
            make.height.equalTo(32)
        }

        registerControl.snp.makeConstraints { make in
            make.height.greaterThanOrEqualTo(96)
        }
        registerIconView.snp.makeConstraints { make in
            make.leading.equalToSuperview().inset(AppSpacing.md)
            make.centerY.equalToSuperview()
            make.width.height.equalTo(34)
        }
        registerTitleLabel.superview?.snp.makeConstraints { make in
            make.leading.equalTo(registerIconView.snp.trailing).offset(AppSpacing.sm)
            make.centerY.equalToSuperview()
            make.trailing.lessThanOrEqualTo(registerActionLabel.snp.leading).offset(-AppSpacing.sm)
        }
        registerActionLabel.snp.makeConstraints { make in
            make.trailing.equalToSuperview().inset(AppSpacing.md)
            make.centerY.equalToSuperview()
            make.height.equalTo(32)
        }

        summaryControl.snp.makeConstraints { make in
            make.height.greaterThanOrEqualTo(180)
        }
        summaryTitleLabel.superview?.snp.makeConstraints { make in
            make.leading.top.bottom.equalToSuperview().inset(AppSpacing.md)
            make.trailing.lessThanOrEqualTo(summaryActionLabel.snp.leading).offset(-AppSpacing.sm)
        }
        summaryActionLabel.snp.makeConstraints { make in
            make.trailing.equalToSuperview().inset(AppSpacing.md)
            make.bottom.equalToSuperview().inset(AppSpacing.md)
            make.height.equalTo(34)
        }
    }

    private func bindActions() {
        overdueControl.addTarget(self, action: #selector(overdueTapped), for: .touchUpInside)
        registerControl.addTarget(self, action: #selector(registerTapped), for: .touchUpInside)
        summaryControl.addTarget(self, action: #selector(summaryTapped), for: .touchUpInside)
    }

    private func configureCard(_ control: UIControl, backgroundColor: UIColor) {
        control.backgroundColor = backgroundColor
        control.layer.cornerRadius = AppRadius.lg
        control.clipsToBounds = true
    }

    private func configureActionLabel(
        _ label: UILabel,
        title: String,
        background: UIColor,
        foreground: UIColor
    ) {
        label.text = "  \(title)  "
        label.font = .systemFont(ofSize: 13, weight: .semibold)
        label.textAlignment = .center
        label.textColor = foreground
        label.backgroundColor = background
        label.layer.cornerRadius = 16
        label.clipsToBounds = true
        label.setContentCompressionResistancePriority(.required, for: .horizontal)
    }

    @objc private func overdueTapped() {
        onOpenOverdue?()
    }

    @objc private func registerTapped() {
        onRegister?()
    }

    @objc private func summaryTapped() {
        onOpenToday?()
    }
}