import UIKit

// MARK: - Public Reader Commands

extension RDEPUBReaderController {
    /// 重新加载书籍，重置所有状态并重新解析 EPUB
    public func reloadBook() {
        runtime.reloadBook()
    }

    /// 跳转到指定阅读位置
    /// - Parameter location: 目标阅读位置
    public func go(to location: RDEPUBLocation) {
        guard publication != nil else { return }
        _ = runtime.go(to: location)
    }

    /// 跳转到指定页码
    /// - Parameters:
    ///   - pageNumber: 目标页码（从 1 开始）
    ///   - animated: 是否动画过渡
    /// - Returns: 是否跳转成功
    @discardableResult
    public func go(toPageNumber pageNumber: Int, animated: Bool = false) -> Bool {
        runtime.go(toPageNumber: pageNumber, animated: animated)
    }

    /// 清除当前文本选中状态
    public func clearSelection() {
        runtime.clearSelection()
    }

    public func bookmark(withID id: String) -> RDEPUBBookmark? {
        runtime.bookmark(withID: id)
    }

    public func highlight(withID id: String) -> RDEPUBHighlight? {
        runtime.highlight(withID: id)
    }

    public func nativeTextSemanticSummary() -> String? {
        guard let textBook,
              let page = textBook.page(at: max(readerView.currentPage + 1, 1)) ?? textBook.pages.first else {
            return nil
        }

        let metadata = page.metadata
        var parts = [
            "page \(page.absolutePageIndex + 1)",
            "break \(metadata.breakReason.rawValue)",
            metadata.blockKinds.isEmpty ? nil : "block kinds [\(metadata.blockKinds.map(\.rawValue).joined(separator: ","))]",
            metadata.semanticHints.isEmpty ? nil : "hints [\(metadata.semanticHints.map(\.rawValue).joined(separator: ","))]",
            metadata.attachmentPlacements.isEmpty ? nil : "placements [\(metadata.attachmentPlacements.map(\.rawValue).joined(separator: ","))]"
        ].compactMap { $0 }
        if let firstDiagnostic = metadata.diagnostics.first {
            parts.append(firstDiagnostic)
        }
        return parts.joined(separator: " · ")
    }

    /// 添加高亮标注，从当前选中文本或指定选区创建
    /// - Parameters:
    ///   - selection: 文本选区，默认使用 currentSelection
    ///   - color: 高亮颜色（CSS 格式），默认黄色
    ///   - note: 可选批注文字
    /// - Returns: 创建的高亮对象，重复时返回 nil
    @discardableResult
    public func addHighlight(
        from selection: RDEPUBSelection? = nil,
        color: String = "#F8E16C",
        note: String? = nil
    ) -> RDEPUBHighlight? {
        runtime.addHighlight(from: selection, color: color, note: note)
    }

    @discardableResult
    public func addAnnotation(
        from selection: RDEPUBSelection? = nil,
        style: RDEPUBHighlightStyle,
        color: String = "#F8E16C",
        note: String? = nil
    ) -> RDEPUBHighlight? {
        runtime.addAnnotation(from: selection, style: style, color: color, note: note)
    }

    @discardableResult
    public func upsertHighlight(_ highlight: RDEPUBHighlight) -> RDEPUBHighlight? {
        runtime.upsertHighlight(highlight)
    }

    @discardableResult
    public func removeHighlight(id: String) -> RDEPUBHighlight? {
        runtime.removeHighlight(id: id)
    }

    @discardableResult
    public func updateHighlightNote(id: String, note: String?) -> RDEPUBHighlight? {
        runtime.updateHighlightNote(id: id, note: note)
    }

    @discardableResult
    public func go(toHighlightID id: String, animated: Bool = true) -> Bool {
        runtime.go(toHighlightID: id, animated: animated)
    }

    public func removeAllHighlights() {
        runtime.removeAllHighlights()
    }

    @discardableResult
    public func go(toTableOfContentsItem item: EPUBTableOfContentsItem, animated: Bool = true) -> Bool {
        go(toTableOfContentsHref: item.href, animated: animated)
    }

    @discardableResult
    public func go(toTableOfContentsItem item: RDEPUBReaderTableOfContentsItem, animated: Bool = true) -> Bool {
        go(toTableOfContentsHref: item.href, animated: animated)
    }

    @discardableResult
    public func go(toTableOfContentsHref href: String, animated: Bool = true) -> Bool {
        guard publication != nil else { return false }

        let components = href.components(separatedBy: "#")
        let baseHref = components.first ?? href
        let fragment = components.count > 1 ? components[1] : nil
        let location = RDEPUBLocation(
            bookIdentifier: currentBookIdentifier,
            href: baseHref,
            progression: 0,
            fragment: fragment
        )
        return restoreReadingLocation(location, animated: animated)
    }

    @discardableResult
    public func addBookmark(note: String? = nil) -> RDEPUBBookmark? {
        runtime.addBookmark(note: note)
    }

    @discardableResult
    public func toggleBookmark(note: String? = nil) -> RDEPUBBookmark? {
        runtime.toggleBookmark(note: note)
    }

    @discardableResult
    public func removeBookmark(id: String) -> RDEPUBBookmark? {
        runtime.removeBookmark(id: id)
    }

    @discardableResult
    public func go(toBookmarkID id: String, animated: Bool = true) -> Bool {
        runtime.go(toBookmarkID: id, animated: animated)
    }

    /// 执行全文搜索，自动跳转到第一个匹配项
    /// - Parameter keyword: 搜索关键词，空字符串会清除搜索
    public func search(keyword: String) {
        runtime.search(keyword: keyword)
    }

    @discardableResult
    public func searchNext() -> Bool {
        runtime.searchNext()
    }

    @discardableResult
    public func searchPrevious() -> Bool {
        runtime.searchPrevious()
    }

    public func clearSearch() {
        runtime.clearSearch()
    }
}