import Foundation
import Observation

/// One file via `repo cat`: text renders (highlighted when the language is
/// known), binary says so, truncated says so — never a guess.
@Observable
@MainActor
final class FileViewModel {

    private(set) var state: LoadState<FileContent> = .loading

    private let client: GitbayClient
    let repoPath: String
    let filePath: String
    let ref: String?

    init(client: GitbayClient, repoPath: String, filePath: String, ref: String? = nil) {
        self.client = client
        self.repoPath = repoPath
        self.filePath = filePath
        self.ref = ref
    }

    var fileName: String {
        String(filePath.split(separator: "/").last ?? "")
    }

    func load() async {
        var argv = ["repo", "cat", repoPath, filePath]
        if let ref { argv.append(contentsOf: ["--ref", ref]) }
        do {
            state = .loaded(try await client.read(argv, as: FileContent.self))
        } catch {
            state = .from(error)
        }
    }
}