import Foundation
import SwiftUI

// MARK: - Family Plan

struct FamilyPlan: Identifiable, Equatable, Codable {
    let id: String
    let ownerId: String
    let ownerName: String
    let members: [FamilyMember]
    let maxMembers: Int
    let subscriptionStatus: SubscriptionStatus
    let renewalDate: Date?
    let createdAt: Date

    enum CodingKeys: String, CodingKey {
        case id, ownerId, ownerName, members, maxMembers, subscriptionStatus, renewalDate, createdAt
    }

    init(
        id: String,
        ownerId: String,
        ownerName: String,
        members: [FamilyMember],
        maxMembers: Int,
        subscriptionStatus: SubscriptionStatus,
        renewalDate: Date?,
        createdAt: Date
    ) {
        self.id = id
        self.ownerId = ownerId
        self.ownerName = ownerName
        self.members = members
        self.maxMembers = maxMembers
        self.subscriptionStatus = subscriptionStatus
        self.renewalDate = renewalDate
        self.createdAt = createdAt
    }

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

    var availableSlots: Int {
        maxMembers - members.count
    }

    var isActive: Bool {
        subscriptionStatus == .active
    }
}

// MARK: - Family Member

struct FamilyMember: Identifiable, Equatable, Codable {
    let id: String
    let name: String
    let email: String
    let role: MemberRole
    let joinedAt: Date
    let avatarUrl: String?
    var isPrimary: Bool
    var totalDistanceKm: Double
    var totalWorkouts: Int
    var weeklyDistanceKm: Double
    var weeklyWorkouts: Int

    enum CodingKeys: String, CodingKey {
        case id, name, email, role, joinedAt, avatarUrl, isPrimary, totalDistanceKm, totalWorkouts, weeklyDistanceKm, weeklyWorkouts
    }

    init(
        id: String,
        name: String,
        email: String,
        role: MemberRole,
        joinedAt: Date,
        avatarUrl: String?,
        isPrimary: Bool,
        totalDistanceKm: Double,
        totalWorkouts: Int,
        weeklyDistanceKm: Double,
        weeklyWorkouts: Int
    ) {
        self.id = id
        self.name = name
        self.email = email
        self.role = role
        self.joinedAt = joinedAt
        self.avatarUrl = avatarUrl
        self.isPrimary = isPrimary
        self.totalDistanceKm = totalDistanceKm
        self.totalWorkouts = totalWorkouts
        self.weeklyDistanceKm = weeklyDistanceKm
        self.weeklyWorkouts = weeklyWorkouts
    }

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

// MARK: - Member Role

enum MemberRole: String, CaseIterable, Codable {
    case owner
    case member
    case pending

    var displayName: String {
        switch self {
        case .owner: return "Owner"
        case .member: return "Member"
        case .pending: return "Pending"
        }
    }

    var icon: String {
        switch self {
        case .owner: return "star.fill"
        case .member: return "person.fill"
        case .pending: return "person.crop.circle.badge.exclamationmark"
        }
    }
}

// MARK: - Subscription Status

enum SubscriptionStatus: String, CaseIterable, Codable {
    case active
    case expired
    case cancelled
    case pending

    var displayName: String {
        switch self {
        case .active: return "Active"
        case .expired: return "Expired"
        case .cancelled: return "Cancelled"
        case .pending: return "Pending"
        }
    }

    var color: Color {
        switch self {
        case .active: return .green
        case .expired: return .red
        case .cancelled: return .orange
        case .pending: return .yellow
        }
    }
}

// MARK: - Family Leaderboard Entry

struct FamilyLeaderboardEntry: Identifiable, Codable {
    let id: String
    let memberId: String
    let memberName: String
    let avatarUrl: String?
    let metric: LeaderboardMetric
    let value: Double
    let rank: Int
}

// MARK: - Leaderboard Metric

enum LeaderboardMetric: String, CaseIterable, Codable {
    case distance
    case workouts
    case streak

    var displayName: String {
        switch self {
        case .distance: return "Distance"
        case .workouts: return "Workouts"
        case .streak: return "Streak"
        }
    }

    var unit: String {
        switch self {
        case .distance: return "km"
        case .workouts: return ""
        case .streak: return "days"
        }
    }
}

// MARK: - Invite Member Request

struct InviteMemberRequest: Encodable {
    let email: String
    let name: String
}

// MARK: - API Response Types

struct FamilyPlanDetailResponse: Decodable {
    let plan: FamilyPlan
}

struct InviteMemberResponse: Decodable {
    let success: Bool
    let invitationId: String
    let memberEmail: String
}

struct RemoveMemberResponse: Decodable {
    let success: Bool
    let memberId: String
}

struct FamilyLeaderboardResponse: Decodable {
    let entries: [FamilyLeaderboardEntry]
    let metric: LeaderboardMetric
}