import Foundation

struct SearchDataPayload: Decodable {
    let users: [UserSearchResult]
}

struct UserSearchResult: Decodable, Identifiable {
    let userId: UUID
    let login: String
    let fullName: String?
    let customName: String?
    let createdAt: Date?
    let profile: SearchProfile?

    var id: UUID { userId }
}

struct SearchProfile: Decodable {
    let userId: UUID
    let login: String?
    let fullName: String?
    let customName: String?
    let bio: String?
    let lastSeen: Int?
    let createdAt: Date?
}

extension UserSearchResult {
    var displayName: String {
        if let custom = preferredCustomName {
            return custom
        }
        if let official = officialFullName {
            return official
        }
        if let profileCustom = trimmed(profile?.customName) {
            return profileCustom
        }
        if let profileFull = trimmed(profile?.fullName) {
            return profileFull
        }
        return loginHandle
    }

    var secondaryText: String? {
        // Отдельное поле для совместимости с существующими вызовами
        if let official = officialFullName, official != displayName {
            return official
        }
        if let profileLogin = trimmed(profile?.login), profileLogin != login {
            return "@\(profileLogin)"
        }
        return nil
    }

    var officialFullName: String? {
        trimmed(fullName) ?? trimmed(profile?.fullName)
    }

    var preferredCustomName: String? {
        trimmed(customName) ?? trimmed(profile?.customName)
    }

    var loginHandle: String {
        "@\(login)"
    }

    var secondaryLabelForSearch: String? {
        if let official = officialFullName {
            if let custom = preferredCustomName, custom != official {
                return custom
            }
            if official != loginHandle {
                return loginHandle
            }
        }

        if let secondary = secondaryText, secondary != displayName {
            return secondary
        }

        if displayName != loginHandle {
            return loginHandle
        }

        return nil
    }

    var avatarInitial: String {
        let source = officialFullName
            ?? preferredCustomName
            ?? trimmed(profile?.login)
            ?? login

        if let character = source.first(where: { !$0.isWhitespace && $0 != "@" }) {
            return String(character).uppercased()
        }
        return "?"
    }

    var isOfficial: Bool {
        officialFullName != nil
    }

    private func trimmed(_ value: String?) -> String? {
        guard let value = value?.trimmingCharacters(in: .whitespacesAndNewlines), !value.isEmpty else {
            return nil
        }
        return value
    }
}