import UIKit

protocol RDEPUBTextBookBuilding {

    func build(
        parser: RDEPUBParser,
        publication: RDEPUBPublication,
        pageSize: CGSize,
        style: RDEPUBTextRenderStyle
    ) throws -> RDEPUBTextBook
}

struct RDEPUBChapterRenderPipeline {
    private let renderer: RDEPUBTextRenderer

    init(renderer: RDEPUBTextRenderer) {
        self.renderer = renderer
    }

    func render(_ request: RDEPUBTextChapterRenderRequest) throws -> RDEPUBRenderedChapterContent {
        try renderer.renderChapter(request: request)
    }
}

struct RDEPUBChapterPaginationPipeline {
    private let frameFactory: RDEPUBPageFrameBuilding

    init(frameFactory: RDEPUBPageFrameBuilding = RDEPUBCoreTextPageFrameFactory()) {
        self.frameFactory = frameFactory
    }

    func frames(
        for content: NSAttributedString,
        pageSize: CGSize,
        config: RDEPUBTextLayoutConfig,
        fragmentOffsets: [String: Int]
    ) -> [RDEPUBTextLayoutFrame] {
        frameFactory.makeFrames(
            attributedString: content,
            pageSize: pageSize,
            config: config,
            fragmentOffsets: fragmentOffsets
        )
    }
}

extension RDEPUBTextBookBuilder: RDEPUBTextBookBuilding {}