import Foundation
import SwiftUI

// MARK: - Notification Item

struct NotificationItem: Identifiable, Equatable, Codable {
    let id: String
    let type: NotificationType
    let title: String
    let message: String
    let createdAt: Date
    var isRead: Bool

    enum CodingKeys: String, CodingKey {
        case id, type, title, message, createdAt, isRead
    }

    init(id: String, type: NotificationType, title: String, message: String, createdAt: Date, isRead: Bool) {
        self.id = id
        self.type = type
        self.title = title
        self.message = message
        self.createdAt = createdAt
        self.isRead = isRead
    }

    static func == (lhs: NotificationItem, rhs: NotificationItem) -> Bool {
        lhs.id == rhs.id && lhs.isRead == rhs.isRead
    }
}

// MARK: - Notification Type

enum NotificationType: String, CaseIterable, Codable {
    case loanApproved = "LOAN_APPROVED"
    case loanRejected = "LOAN_REJECTED"
    case paymentReceived = "PAYMENT_RECEIVED"
    case paymentDue = "PAYMENT_DUE"
    case newLender = "NEW_LENDER"
    case systemUpdate = "SYSTEM_UPDATE"

    var icon: String {
        switch self {
        case .loanApproved: return "checkmark.circle.fill"
        case .loanRejected: return "xmark.circle.fill"
        case .paymentReceived: return "arrow.down.circle.fill"
        case .paymentDue: return "exclamationmark.circle.fill"
        case .newLender: return "person.circle.fill"
        case .systemUpdate: return "info.circle.fill"
        }
    }

    var color: Color {
        switch self {
        case .loanApproved: return .green
        case .loanRejected: return .red
        case .paymentReceived: return .green
        case .paymentDue: return .orange
        case .newLender: return .blue
        case .systemUpdate: return .gray
        }
    }
}

// MARK: - List Parameters

struct NotificationListParams: Encodable {
    var limit: Int
    var offset: Int

    init(limit: Int = 20, offset: Int = 0) {
        self.limit = limit
        self.offset = offset
    }
}

// MARK: - API Response Types

struct NotificationListResponse: Decodable {
    let notifications: [NotificationItem]
    let hasMore: Bool
}

struct NotificationMarkAsReadResponse: Decodable {
    let success: Bool
    let notificationId: String
}

struct NotificationMarkAllReadResponse: Decodable {
    let success: Bool
    let markedCount: Int
}