//
//  BlockingRule.swift
//  Severed
//

import Foundation
import SwiftData

/// A recurring screen-time blocking rule.
///
/// Times are stored as minutes from midnight so the schedule repeats cleanly and
/// is independent of time zones at creation. A window whose end is at or before
/// its start (e.g. 22:00 → 06:00) crosses midnight into the following day.
@Model
final class BlockingRule {
    @Attribute(.unique) var id: UUID
    var name: String
    var kindRaw: String
    var isEnabled: Bool
    /// Hard block: while the rule is active it cannot be disabled, edited, or unblocked.
    var hardMode: Bool
    /// Engage Screen Time's adult-website filter while this rule is blocking.
    /// Inline default so existing stores migrate cleanly.
    var blockAdultContent: Bool = false
    var selectionModeRaw: String
    /// Encoded `FamilyActivitySelection` (opaque tokens). Nil until the user picks apps.
    var selectionData: Data?
    /// Denormalized count of selected apps/categories/domains for display.
    var selectionCount: Int
    var dayNumbers: [Int]
    var startMinutes: Int
    var endMinutes: Int
    /// Daily usage budget for `.timeLimit` rules.
    var dailyLimitMinutes: Int
    /// Daily open budget for `.openLimit` rules.
    var maxOpens: Int
    /// When set, the rule's current window is suspended (user tapped Unblock).
    /// Cleared automatically once the date passes; never set while Hard Mode is active.
    var pausedUntil: Date?
    var createdAt: Date

    init(
        id: UUID = UUID(),
        name: String,
        kind: RuleKind = .schedule,
        isEnabled: Bool = true,
        hardMode: Bool = false,
        blockAdultContent: Bool = false,
        selectionMode: SelectionMode = .block,
        selectionData: Data? = nil,
        selectionCount: Int = 0,
        days: Set<Weekday> = Weekday.weekdays,
        startMinutes: Int = 9 * 60,
        endMinutes: Int = 17 * 60,
        dailyLimitMinutes: Int = 45,
        maxOpens: Int = 5,
        pausedUntil: Date? = nil,
        createdAt: Date = .now
    ) {
        self.id = id
        self.name = name
        self.kindRaw = kind.rawValue
        self.isEnabled = isEnabled
        self.hardMode = hardMode
        self.blockAdultContent = blockAdultContent
        self.selectionModeRaw = selectionMode.rawValue
        self.selectionData = selectionData
        self.selectionCount = selectionCount
        self.dayNumbers = days.map(\.rawValue).sorted()
        self.startMinutes = startMinutes
        self.endMinutes = endMinutes
        self.dailyLimitMinutes = dailyLimitMinutes
        self.maxOpens = maxOpens
        self.pausedUntil = pausedUntil
        self.createdAt = createdAt
    }

    var kind: RuleKind {
        get { RuleKind(rawValue: kindRaw) ?? .schedule }
        set { kindRaw = newValue.rawValue }
    }

    var selectionMode: SelectionMode {
        get { SelectionMode(rawValue: selectionModeRaw) ?? .block }
        set { selectionModeRaw = newValue.rawValue }
    }

    var days: Set<Weekday> {
        get { Set(dayNumbers.compactMap(Weekday.init(rawValue:))) }
        set { dayNumbers = newValue.map(\.rawValue).sorted() }
    }

    var schedule: RuleSchedule {
        RuleSchedule(startMinutes: startMinutes, endMinutes: endMinutes, days: days)
    }
}