using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.IO;
using TMPro;

public class DownloadMarker : MonoBehaviour
{
    [Header("Settings")]
    public string fileName = "marker.pdf";

    [Header("UI (opsional)")]
    public TextMeshProUGUI statusText;
    public Button downloadButton;

    private string sourcePath;
    private string destPath;

    void Start()
    {
        sourcePath = Path.Combine(Application.streamingAssetsPath, fileName);

#if UNITY_ANDROID && !UNITY_EDITOR
        string externalDir = GetAndroidExternalStorage();
        destPath = Path.Combine(externalDir, fileName);
#else
        destPath = Path.Combine(Application.persistentDataPath, fileName);
#endif
    }

    public void OnClickDownload()
    {
        if (downloadButton != null) downloadButton.interactable = false;
        SetStatus("Menyiapkan marker...");
        StartCoroutine(CopyAndOpenPDF());
    }

    IEnumerator CopyAndOpenPDF()
    {
        if (!File.Exists(destPath))
        {
            SetStatus("Mengunduh file...");
            using (UnityEngine.Networking.UnityWebRequest req =
                   UnityEngine.Networking.UnityWebRequest.Get(sourcePath))
            {
                yield return req.SendWebRequest();

                if (req.result != UnityEngine.Networking.UnityWebRequest.Result.Success)
                {
                    SetStatus("Gagal memuat: " + req.error);
                    if (downloadButton != null) downloadButton.interactable = true;
                    yield break;
                }

                File.WriteAllBytes(destPath, req.downloadHandler.data);
                Debug.Log("[DownloadMarker] Saved to: " + destPath);
            }
        }

        SetStatus("Membuka marker...");
        OpenPDF();

        yield return new WaitForSeconds(3f);
        SetStatus("");
        if (downloadButton != null) downloadButton.interactable = true;
    }

    void OpenPDF()
    {
#if UNITY_EDITOR
        System.Diagnostics.Process.Start(destPath);

#elif UNITY_ANDROID
        try
        {
            AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");

            AndroidJavaObject file = new AndroidJavaObject("java.io.File", destPath);

            AndroidJavaClass uriClass = new AndroidJavaClass("android.net.Uri");
            AndroidJavaObject uri = uriClass.CallStatic<AndroidJavaObject>("fromFile", file);

            AndroidJavaObject intent = new AndroidJavaObject("android.content.Intent");
            intent.Call<AndroidJavaObject>("setAction", "android.intent.action.VIEW");
            intent.Call<AndroidJavaObject>("setDataAndType", uri, "application/pdf");
            intent.Call<AndroidJavaObject>("addFlags", 0x00000001);

            activity.Call("startActivity", intent);
        }
        catch (System.Exception e)
        {
            SetStatus("Tidak ada app PDF. File ada di: " + destPath);
            Debug.LogError("[DownloadMarker] Error: " + e.Message);
        }
#endif
    }

    string GetAndroidExternalStorage()
    {
        try
        {
            AndroidJavaClass envClass = new AndroidJavaClass("android.os.Environment");
            AndroidJavaObject downloadsDir = envClass.CallStatic<AndroidJavaObject>(
                "getExternalStoragePublicDirectory",
                envClass.GetStatic<AndroidJavaObject>("DIRECTORY_DOWNLOADS")
            );
            return downloadsDir.Call<string>("getAbsolutePath");
        }
        catch
        {
            return Application.persistentDataPath;
        }
    }

    void SetStatus(string msg)
    {
        if (statusText != null) statusText.text = msg;
        Debug.Log("[DownloadMarker] " + msg);
    }
}