1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71
72. 72
73. 73
74. 74
75. 75
76. 76
77. 77
78. 78
79. 79
80. 80
81. 81
82. 82
83. 83
84. 84
85. 85
86. 86
87. 87
88. 88
89. 89
90. 90
91. 91
92. 92

// Copyright 2025 Shota FUJI
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

import RoonKit
import SwiftUI

@Observable
final class ZoneDataModel {
	let conn: Communicatable

	public var zone: TransportService.Zone? = nil
	private var _zones: [TransportService.Zone] = []

	private(set) var zones: [TransportService.Zone] {
		get { _zones }

		set {
			_zones = newValue

			if let zoneID = zone?.id {
				for zone in _zones {
					if zone.id == zoneID {
						return
					}
				}
			}

			for zone in _zones {
				self.zone = zone
				return
			}

			self.zone = nil
		}
	}

	init(conn: Communicatable) {
		self.conn = conn
	}

	func watchChanges() async throws {
		let msg = try await conn.request(
			Moo(subscribeZoneChange: .init(subscriptionID: UUID().uuidString))
		)
		let body = try TransportService.SubscribeZoneChangesResponse(msg)

		zones = body.zones

		for try await message in await conn.messages.compactMap({
			TransportService.ZoneChangeEvent($0)
		}) {
			for added in message.addedZones {
				putZone(zone: added)
			}

			for changed in message.changedZones {
				putZone(zone: changed)
			}

			for removedID in message.removedZoneIDs {
				removeZone(zoneID: removedID)
			}
		}
	}

	private func putZone(zone: TransportService.Zone) {
		if let index = zones.firstIndex(where: { z in z.id == zone.id }) {
			zones[index] = zone
		} else {
			zones.append(zone)
		}
	}

	private func removeZone(zoneID: TransportService.Zone.ID) {
		if let index = zones.firstIndex(where: { z in z.id == zoneID }) {
			zones.remove(at: index)
		}
	}
}