import Foundation
import AppIntents

// MARK: - Open

/// Opens a bookmark in the in-app browser. Conforms to `OpenIntent` — the
/// system-blessed "open" type Siri understands. (iOS 26 has no separate
/// `system.open` App Schema; `OpenIntent` with an `AppEntity` target *is* the
/// supported mechanism, so no schema macro is needed here.)
struct OpenBookmarkIntent: OpenIntent {
    static let title: LocalizedStringResource = "Open Bookmark"
    static let openAppWhenRun = true

    @Parameter(title: "Bookmark")
    var target: BookmarkEntity

    @MainActor
    func perform() async throws -> some IntentResult {
        IntentRouter.shared.openBookmark(url: target.url.absoluteString)
        return .result()
    }
}

// MARK: - Search

/// Searches Marks and shows the results in the app's search tab.
///
/// Conforms to the formal `system.search` App Schema (`ShowInAppSearchResultsIntent`),
/// which is what makes it executable by conversational Siri / Apple Intelligence:
/// Siri hands over the spoken term as `criteria` and the app re-runs it in its
/// own search UI. `searchScopes` defaults to `[.general]` for string criteria.
@AppIntent(schema: .system.search)
struct SearchMarksIntent {
    static let title: LocalizedStringResource = "Search Marks"
    static let description = IntentDescription("Search your Marks bookmarks.")

    @Parameter(title: "Search", requestValueDialog: "What do you want to search for?")
    var criteria: StringSearchCriteria

    @MainActor
    func perform() async throws -> some IntentResult {
        IntentRouter.shared.search(criteria.term)
        return .result()
    }
}

// MARK: - Add

/// Saves a link to Marks without opening the app. Mirrors the Share Extension's
/// headless save, but goes through the typed `LinkdingAPI`.
struct AddBookmarkIntent: AppIntent {
    static let title: LocalizedStringResource = "Add Bookmark to Marks"
    static let description = IntentDescription("Save a link to your Marks bookmarks.")
    static let openAppWhenRun = false

    @Parameter(title: "URL")
    var url: URL

    @Parameter(title: "Title")
    var name: String?

    @Parameter(title: "Tags")
    var tags: [String]?

    static var parameterSummary: some ParameterSummary {
        Summary("Add \(\.$url) to Marks") {
            \.$name
            \.$tags
        }
    }

    func perform() async throws -> some IntentResult & ReturnsValue<BookmarkEntity> & ProvidesDialog & ShowsSnippetView {
        let api = try MarksIntent.api()
        let create = BookmarkCreate(
            url: url.absoluteString,
            title: name ?? "",
            tagNames: tags ?? [],
            isArchived: false,
            unread: true,
            shared: false
        )
        let bookmark = try await api.createBookmark(create)
        let entity = BookmarkEntity(from: bookmark)
        MarksIntent.refreshWidgets(adding: bookmark)
        return .result(
            value: entity,
            dialog: IntentDialog("Saved \(entity.title) to Marks."),
            view: BookmarkSnippetView(entity: entity)
        )
    }
}

// MARK: - Show unread

/// Returns the user's unread bookmarks — "what's unread in Marks?"
struct ShowUnreadIntent: AppIntent {
    static let title: LocalizedStringResource = "Show Unread Bookmarks"
    static let description = IntentDescription("List the bookmarks you haven't read yet.")

    func perform() async throws -> some IntentResult & ReturnsValue<[BookmarkEntity]> & ProvidesDialog {
        let api = try MarksIntent.api()
        let response = try await api.fetchBookmarks(limit: 10, unread: true)
        let entities = response.results.map(BookmarkEntity.init(from:))
        let dialog: IntentDialog = entities.isEmpty
            ? "You have no unread bookmarks."
            : "You have \(entities.count) unread bookmark\(entities.count == 1 ? "" : "s")."
        return .result(value: entities, dialog: dialog)
    }
}

// MARK: - Summarize (AI)

/// Produces an AI summary of a bookmark via the bundled ClaudeService.
struct SummarizeBookmarkIntent: AppIntent {
    static let title: LocalizedStringResource = "Summarize Bookmark"
    static let description = IntentDescription("Get an AI summary of a saved bookmark.")

    @Parameter(title: "Bookmark")
    var target: BookmarkEntity

    static var parameterSummary: some ParameterSummary {
        Summary("Summarize \(\.$target)")
    }

    func perform() async throws -> some IntentResult & ReturnsValue<String> & ProvidesDialog & ShowsSnippetView {
        let claude = ClaudeService()
        let (summary, _) = try await claude.enrich(bookmark: target.makeBookmark())
        return .result(
            value: summary,
            dialog: IntentDialog("\(summary)"),
            view: SummarySnippetView(title: target.title, host: target.host, summary: summary)
        )
    }
}

// MARK: - App Shortcuts

struct MarksShortcuts: AppShortcutsProvider {
    static var appShortcuts: [AppShortcut] {
        AppShortcut(
            intent: AddBookmarkIntent(),
            phrases: [
                "Add a bookmark to \(.applicationName)",
                "Save this link to \(.applicationName)"
            ],
            shortTitle: "Add Bookmark",
            systemImageName: "bookmark"
        )
        AppShortcut(
            intent: SearchMarksIntent(),
            phrases: [
                "Search \(.applicationName)",
                "Search my bookmarks in \(.applicationName)"
            ],
            shortTitle: "Search",
            systemImageName: "magnifyingglass"
        )
        AppShortcut(
            intent: ShowUnreadIntent(),
            phrases: [
                "Show unread in \(.applicationName)",
                "What's unread in \(.applicationName)"
            ],
            shortTitle: "Unread",
            systemImageName: "envelope.badge"
        )
        AppShortcut(
            intent: SummarizeBookmarkIntent(),
            phrases: [
                "Summarize a bookmark in \(.applicationName)",
                "Summarize this with \(.applicationName)"
            ],
            shortTitle: "Summarize",
            systemImageName: "sparkles"
        )
    }
}