import Foundation

struct ImageToGenerate {

    let size: Int

    let image: FileResource
}

extension ImageToGenerate: Hashable {

    func hash(into hasher: inout Hasher) {
        hasher.combine(size)
        hasher.combine(image.id)
    }
}

final class PageGenerationResults: ObservableObject {

    @Published
    var linkedPages: Set<Page> = []

    @Published
    var linkedTags: Set<Tag> = []

    @Published
    var externalLinks: Set<String> = []

    @Published
    var files: Set<FileResource> = []

    @Published
    var imagesToGenerate: Set<ImageToGenerate> = []

    @Published
    var missingPages: Set<String> = []

    @Published
    var missingFiles: Set<String> = []

    @Published
    var missingTags: Set<String> = []

    @Published
    var invalidCommands: [(command: ShorthandMarkdownKey?, markdown: String)] = []

    @Published
    var requiredHeaders: RequiredHeaders = []

    @Published
    var requiredFooters: Set<String> = []

    @Published
    var requiredIcons: Set<PageIcon> = []

    @Published
    var issues: Set<PageContentAnomaly> = []

    func reset() {
        linkedPages = []
        linkedTags = []
        externalLinks = []
        files = []
        imagesToGenerate = []
        missingPages = []
        missingFiles = []
        missingTags = []
        invalidCommands = []
        requiredHeaders = []
        requiredFooters = []
        requiredIcons = []
        issues = []
    }

    func invalid(command: ShorthandMarkdownKey?, _ markdown: Substring) {
        invalidCommands.append((command, String(markdown)))
        issues.insert(.invalidCommand(command: command, markdown: String(markdown)))
    }

    func missing(page: String, markdown: Substring) {
        missingPages.insert(page)
        issues.insert(.missingPage(page: page, markdown: String(markdown)))
    }

    func missing(tag: String, markdown: Substring) {
        missingTags.insert(tag)
        issues.insert(.missingTag(tag: tag, markdown: String(markdown)))
    }

    func missing(file: String, markdown: Substring) {
        missingFiles.insert(file)
        issues.insert(.missingFile(file: file, markdown: String(markdown)))
    }
}