//
//  AppStore.swift
//  suixinkan
//

import Foundation

/// 本地会话存储，与 Android `AppStoreDataSource` 对齐。
final class AppStore {

    static let shared = AppStore()

    private enum Key {
        static let token = "key_in_token"
        static let lastLoginUsername = "key_last_login_username"
        static let privacyAgreementAccepted = "key_privacy_agreement_accepted"
        static let userId = "key_in_user_id"
        static let userName = "key_in_user_name"
        static let realName = "key_in_real_name"
        static let avatar = "key_in_avatar"
        static let phone = "key_in_phone"
        static let accountType = "key_in_account_type"
        static let accountDisplayName = "key_in_account_display_name"
        static let roleCode = "key_in_role_code"
        static let roleName = "key_in_role_name"
        static let currentScenicId = "key_in_current_scenic_id"
        static let currentScenicName = "key_in_current_scenic_name"
        static let currentStoreId = "key_in_current_store_id"
    }

    private let defaults: UserDefaults

    init(defaults: UserDefaults = .standard) {
        self.defaults = defaults
    }

    /// 登录 Token。
    var token: String {
        get { defaults.string(forKey: Key.token) ?? "" }
        set { defaults.set(newValue, forKey: Key.token) }
    }

    /// 上次登录手机号，用于登录页恢复。
    var lastLoginUsername: String? {
        get { defaults.string(forKey: Key.lastLoginUsername) }
        set {
            if let newValue {
                defaults.set(newValue, forKey: Key.lastLoginUsername)
            } else {
                defaults.removeObject(forKey: Key.lastLoginUsername)
            }
        }
    }

    /// 是否已同意隐私协议。
    var privacyAgreementAccepted: Bool {
        get { defaults.bool(forKey: Key.privacyAgreementAccepted) }
        set { defaults.set(newValue, forKey: Key.privacyAgreementAccepted) }
    }

    var userId: String {
        get { defaults.string(forKey: Key.userId) ?? "" }
        set { defaults.set(newValue, forKey: Key.userId) }
    }

    var userName: String {
        get { defaults.string(forKey: Key.userName) ?? "" }
        set { defaults.set(newValue, forKey: Key.userName) }
    }

    var realName: String {
        get { defaults.string(forKey: Key.realName) ?? "" }
        set { defaults.set(newValue, forKey: Key.realName) }
    }

    var avatar: String {
        get { defaults.string(forKey: Key.avatar) ?? "" }
        set { defaults.set(newValue, forKey: Key.avatar) }
    }

    var phone: String {
        get { defaults.string(forKey: Key.phone) ?? "" }
        set { defaults.set(newValue, forKey: Key.phone) }
    }

    var accountType: String {
        get { defaults.string(forKey: Key.accountType) ?? "" }
        set { defaults.set(newValue, forKey: Key.accountType) }
    }

    var accountDisplayName: String {
        get { defaults.string(forKey: Key.accountDisplayName) ?? "" }
        set { defaults.set(newValue, forKey: Key.accountDisplayName) }
    }

    var roleCode: String {
        get { defaults.string(forKey: Key.roleCode) ?? "" }
        set { defaults.set(newValue, forKey: Key.roleCode) }
    }

    var roleName: String {
        get { defaults.string(forKey: Key.roleName) ?? "" }
        set { defaults.set(newValue, forKey: Key.roleName) }
    }

    var currentScenicId: Int {
        get {
            let value = defaults.string(forKey: Key.currentScenicId) ?? ""
            return Int(value) ?? 0
        }
        set {
            defaults.set(newValue > 0 ? String(newValue) : "", forKey: Key.currentScenicId)
        }
    }

    var currentScenicName: String {
        get { defaults.string(forKey: Key.currentScenicName) ?? "" }
        set { defaults.set(newValue, forKey: Key.currentScenicName) }
    }

    var currentStoreId: Int {
        get { defaults.integer(forKey: Key.currentStoreId) }
        set { defaults.set(newValue, forKey: Key.currentStoreId) }
    }

    /// 当前解析后的业务角色。
    var currentAppRole: AppRoleCode? {
        AppRoleCode.fromCode(roleCode) ?? AppRoleCode.fromRoleName(roleName)
    }

    /// 当前是否为摄影师角色。
    var isPhotographerRole: Bool {
        if let role = currentAppRole {
            return role.isPhotographer
        }
        let name = roleName.trimmingCharacters(in: .whitespacesAndNewlines)
        return name == "摄影师"
    }

    /// Token 非空视为已登录。
    var isLoggedIn: Bool {
        !token.isEmpty
    }

    /// 保存登录 Token。
    func saveToken(_ token: String) {
        self.token = token
    }

    /// 从账号切换实体写入会话快照。
    func applyAccount(_ account: AccountSwitchAccount) {
        userId = String(account.businessUserId)
        accountType = account.accountType
        accountDisplayName = account.title
        userName = account.subtitle
        phone = account.phone
        if !account.avatar.isEmpty {
            avatar = account.avatar
        }
        currentScenicName = account.scenicName
        currentScenicId = account.scenicId ?? 0
        currentStoreId = account.storeId ?? 0
    }

    /// 从用户资料接口回写展示字段。
    func applyUserInfo(_ info: UserInfoResponse) {
        if !info.nickname.isEmpty {
            userName = info.nickname
        }
        if !info.realName.isEmpty {
            realName = info.realName
        }
        if !info.avatar.isEmpty {
            avatar = info.avatar
        }
        if !info.phone.isEmpty {
            phone = info.phone
        }
        if !info.roleName.isEmpty, roleName.isEmpty {
            roleName = info.roleName
        }
    }

    /// 清除登录态与会话快照。
    func logout() {
        token = ""
        userId = ""
        userName = ""
        realName = ""
        avatar = ""
        phone = ""
        accountType = ""
        accountDisplayName = ""
        roleCode = ""
        roleName = ""
        currentScenicId = 0
        currentScenicName = ""
        currentStoreId = 0
    }
}