import Foundation
import OrgSwift
import SwiftUI

/// README rendering follows the file's format. Org is rendered by the shared `OrgSwift`
/// package (in a web view); everything else keeps the established Markdown renderer.
struct ReadmeView: View {
    let name: String
    let content: String
    /// Instance host and `owner/repo`, used to resolve repository-relative links and images.
    /// Empty leaves relative references unresolved.
    var host: String = ""
    var repoPath: String = ""

    /// Format follows the file name, never a guess at the content.
    var isOrg: Bool { name.lowercased().hasSuffix(".org") }

    var body: some View {
        if isOrg {
            OrgReadmeWebView(source: content, options: orgOptions)
        } else {
            MarkdownView(markdown: content)
        }
    }

    /// gitbay serves raw bytes at `/{owner}/{repo}/raw/{ref}/…` and the file page at
    /// `/blob/…`, so relative images resolve against `raw` and links against `blob`.
    private var orgOptions: OrgRenderOptions {
        let parts = repoPath.split(separator: "/", maxSplits: 1).map(String.init)
        guard parts.count == 2, !host.isEmpty else {
            return OrgRenderOptions()
        }
        return OrgRenderOptions(
            host: host,
            owner: parts[0],
            repositoryName: parts[1],
            ref: "HEAD",
            readmePath: name,
            imagePathSegment: "raw",
            linkPathSegment: "blob"
        )
    }
}