//
//  Task.swift
//  Todos
//
//  Created by Sam Jaffe on 2/28/26.
//

import Foundation
import SwiftData

enum Status : String, CaseIterable, Identifiable, Codable {
  case Todo = " "
  case Complete = "V"
  case InProgress = "C"
  case Hiatus = "H"
  case Waiting = "R"
  
  var id: Self { self }
  var description: String { self.rawValue }
  var isStrong: Bool {
    self == .Complete || self == .Hiatus || self == .Waiting
  }
  var label: String {
    switch (self) {
      case .Todo: return "square.and.pencil"
      case .Complete: return "checkmark"
      case .InProgress: return "ellipsis.circle"
      case .Hiatus: return "clock.badge.questionmark"
      case .Waiting: return "airplane.circle"
    }
  }
}

@Model
final class SubTask {
  var name: String
  var notes: String = ""
  var status: Status = Status.Todo
  
  init(name: String) {
    self.name = name
  }
  
  func yaml(_ indent: Int = 0) -> String {
    let h1 = String(repeating: "  ", count: indent)
    let h2 = String(repeating: "  ", count: indent + 1)
    var rval = h1 + "- [\(status.rawValue)] \(name)\n"
    if !notes.isEmpty {
      rval += h2 + "# " + notes.replacingOccurrences(of: "\n", with: "\n" + h2 + "# ") + "\n"
    }
    return rval
  }
}

struct Tag : Codable, Identifiable {
  var id: String
  
  func like(_ str: String) -> Bool {
    return id.caseInsensitiveCompare(str) == .orderedSame
  }
}

@Model
final class Task {
  var name: String
  var tags: [Tag] = []
  var subtasks: [SubTask] = []
  var notes: String = ""
  var status: Status = Status.Todo
  
  init(name: String) {
    self.name = name
  }
  
  func yaml(_ indent: Int = 0) -> String {
    let h1 = String(repeating: "  ", count: indent)
    let h2 = String(repeating: "  ", count: indent + 1)
    var rval = h1 + "[\(status.rawValue)] \(name) "
    rval += "(\(tags.map(\.id).joined(separator: " ")))\n"
    if !notes.isEmpty {
      rval += h2 + "# " + notes.replacingOccurrences(of: "\n", with: "\n" + h2 + "# ") + "\n"
    }
    rval += subtasks.map({ $0.yaml(indent + 1) }).joined()
    return rval
  }
}