import Foundation

// MARK: - PulseTask

struct PulseTask: Codable, Identifiable {
    let id: Int
    var title: String
    var description: String?
    var completed: Bool
    var priority: Int?
    var icon: String?
    var color: String?
    var dueDate: String?
    var reminderTime: String?
    var createdAt: String?
    var isRecurring: Bool?
    var recurrenceType: String?
    var recurrenceInterval: Int?

    var priorityColor: String {
        switch priority {
        case 4: return "ff0000"
        case 3: return "ff4757"
        case 2: return "ffa502"
        default: return "8888aa"
        }
    }

    var priorityDisplayName: String {
        switch priority {
        case 1: return "Низкий"
        case 2: return "Средний"
        case 3: return "Высокий"
        case 4: return "Срочный"
        default: return "Без приоритета"
        }
    }

    var isOverdue: Bool {
        guard !completed, let due = dueDate else { return false }
        let dateStr = String(due.prefix(10))
        let today = ISO8601DateFormatter().string(from: Date()).prefix(10)
        return dateStr < today
    }

    var dueDateFormatted: String? {
        guard let due = dueDate else { return nil }
        let dateStr = String(due.prefix(10))
        let todayStr = String(ISO8601DateFormatter().string(from: Date()).prefix(10))
        let tomorrowDate = Calendar.current.date(byAdding: .day, value: 1, to: Date())!
        let tomorrowStr = String(ISO8601DateFormatter().string(from: tomorrowDate).prefix(10))
        if dateStr == todayStr { return "Сегодня" }
        if dateStr == tomorrowStr { return "Завтра" }
        let parts = dateStr.split(separator: "-")
        guard parts.count == 3 else { return dateStr }
        return "\(parts[2]).\(parts[1]).\(parts[0])"
    }

    enum CodingKeys: String, CodingKey {
        case id, title, description, completed, priority, icon, color
        case dueDate = "due_date"
        case reminderTime = "reminder_time"
        case createdAt = "created_at"
        case isRecurring = "is_recurring"
        case recurrenceType = "recurrence_type"
        case recurrenceInterval = "recurrence_interval"
    }
}

// MARK: - TaskStats

struct TaskStats: Codable {
    let totalTasks: Int?
    let completedTasks: Int?
    let todayTasks: Int?
    let todayCompleted: Int?

    enum CodingKeys: String, CodingKey {
        case totalTasks = "total_tasks"
        case completedTasks = "completed_tasks"
        case todayTasks = "today_tasks"
        case todayCompleted = "today_completed"
    }
}

// MARK: - CreateTaskRequest

struct CreateTaskRequest: Codable {
    var title: String
    var description: String?
    var priority: Int?
    var dueDate: String?
    var icon: String?
    var color: String?

    enum CodingKeys: String, CodingKey {
        case title, description, priority, icon, color
        case dueDate = "due_date"
    }
}

// MARK: - UpdateTaskRequest

struct UpdateTaskRequest: Codable {
    var title: String?
    var description: String?
    var priority: Int?
    var dueDate: String?
    var completed: Bool?

    enum CodingKeys: String, CodingKey {
        case title, description, priority, completed
        case dueDate = "due_date"
    }
}