import AppKit
import SwiftUI
import WebKit

/// Embeds the Feishu record page inside the app. Uses the default persistent
/// data store, so the Feishu login survives app restarts. Workflow (流程)
/// fields can't be reached via the API — this is the in-app way to advance them.
struct FeishuWebView: NSViewRepresentable {
    let url: URL

    func makeNSView(context: Context) -> WKWebView {
        let configuration = WKWebViewConfiguration()
        configuration.websiteDataStore = .default()
        let webView = WKWebView(frame: .zero, configuration: configuration)
        webView.navigationDelegate = context.coordinator
        webView.allowsBackForwardNavigationGestures = true
        webView.load(URLRequest(url: url))
        return webView
    }

    func updateNSView(_ webView: WKWebView, context: Context) {
        if webView.url?.absoluteString != url.absoluteString {
            webView.load(URLRequest(url: url))
        }
    }

    func makeCoordinator() -> Coordinator {
        Coordinator()
    }

    final class Coordinator: NSObject, WKNavigationDelegate {
        // Only http(s) navigates inside the webview. Custom schemes the page
        // may try (e.g. feishu:// to hand off to the desktop client) are
        // routed to the system instead of failing silently.
        func webView(
            _ webView: WKWebView,
            decidePolicyFor navigationAction: WKNavigationAction
        ) async -> WKNavigationActionPolicy {
            guard let url = navigationAction.request.url,
                  let scheme = url.scheme else { return .allow }
            if scheme == "http" || scheme == "https" {
                return .allow
            }
            NSWorkspace.shared.open(url)
            return .cancel
        }
    }
}

/// Window content wrapper: WKWebView has no intrinsic size, so a bare hosting
/// controller collapses the window to ~1px — pin a minimum size here.
struct FeishuWebWindowContent: View {
    let url: URL

    var body: some View {
        FeishuWebView(url: url)
            .frame(minWidth: 900, minHeight: 600)
    }
}