package com.labfytools.trainlog.data

import android.app.Activity
import android.content.Intent
import android.os.Bundle
import android.widget.Button
import android.widget.LinearLayout
import android.widget.TextView

/** Minimal non-migrating bridge UI; it intentionally exposes backup/restore only. */
class BackupBridgeActivity : Activity() {
    private lateinit var repository: TrainlogRepository
    private lateinit var status: TextView
    private val service by lazy { AndroidBackupService(applicationContext) }
    override fun onCreate(state: Bundle?) {
        super.onCreate(state); repository = TrainlogRepository(applicationContext)
        status = TextView(this).apply { text = "Plaintext local backup. Keep the exported file private." }
        val backup = Button(this).apply { text = "Create complete backup"; setOnClickListener {
            startActivityForResult(Intent(Intent.ACTION_CREATE_DOCUMENT).setType("application/zip")
                .putExtra(Intent.EXTRA_TITLE, "trainlog-backup.tlbackup").addCategory(Intent.CATEGORY_OPENABLE), 1) } }
        val restore = Button(this).apply { text = "Verify and restore backup"; setOnClickListener {
            startActivityForResult(Intent(Intent.ACTION_OPEN_DOCUMENT).setType("application/zip")
                .addCategory(Intent.CATEGORY_OPENABLE), 2) } }
        setContentView(LinearLayout(this).apply { orientation = LinearLayout.VERTICAL; addView(status); addView(backup); addView(restore) })
    }
    override fun onActivityResult(request: Int, result: Int, data: Intent?) {
        super.onActivityResult(request, result, data); if (result != RESULT_OK || data?.data == null) return
        if (request == 1) contentResolver.openOutputStream(data.data!!, "w")!!.use {
            status.text = service.create(repository, it).toString()
        } else if (request == 2) contentResolver.openInputStream(data.data!!)!!.use {
            val verified = service.verify(it).getOrElse { error -> status.text = error.message; return }
            status.text = service.restore(repository, verified).toString()
            recreate()
        }
    }
    override fun onDestroy() { repository.close(); super.onDestroy() }
}