/*
 Copyright (C) 2024 Rubén Beltrán del Río

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program. If not, see https://map.tranquil.systems.
 */
import SwiftUI
import UniformTypeIdentifiers

extension UTType {
  static var exampleText: UTType {
    UTType(importedAs: "systems.tranquil.map.wmap")
  }
}

struct MapDocument: FileDocument {
  var text: String

  init(text: String = "Hello, world!") {
    self.text = text
  }

  static var readableContentTypes: [UTType] { [.exampleText] }

  init(configuration: ReadConfiguration) throws {
    guard let data = configuration.file.regularFileContents,
      let string = String(data: data, encoding: .utf8)
    else {
      throw CocoaError(.fileReadCorruptFile)
    }
    text = string
  }

  func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper {
    let data = text.data(using: .utf8)!
    return .init(regularFileWithContents: data)
  }

  @MainActor
  func exportAsImage(withEvolution selectedEvolution: StageType) -> NSImage? {
    let renderView = MapRenderView(
      document: .constant(self),
      evolution: .constant(selectedEvolution))
    let renderer = ImageRenderer(content: renderView)

    return renderer.nsImage
  }
}