funkwhale-app-android/app/src/main/java/audio/funkwhale/ffa/activities/LoginActivity.kt

package audio.funkwhale.ffa.activities

import android.content.Intent
import android.content.res.Configuration
import android.net.Uri
import android.os.Bundle
import android.view.ViewGroup
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.doOnLayout
import androidx.lifecycle.lifecycleScope
import audio.funkwhale.ffa.R
import audio.funkwhale.ffa.databinding.ActivityLoginBinding
import audio.funkwhale.ffa.fragments.LoginDialog
import audio.funkwhale.ffa.utils.AppContext
import audio.funkwhale.ffa.utils.OAuth
import audio.funkwhale.ffa.utils.OAuthFactory
import audio.funkwhale.ffa.utils.Userinfo
import audio.funkwhale.ffa.utils.log
import com.github.kittinunf.fuel.Fuel
import com.github.kittinunf.fuel.coroutines.awaitObjectResponseResult
import com.github.kittinunf.fuel.gson.gsonDeserializerOf
import com.github.kittinunf.result.Result
import com.preference.PowerPreference
import kotlinx.coroutines.Dispatchers.Main
import kotlinx.coroutines.launch

data class FwCredentials(val token: String, val non_field_errors: List<String>?)

class LoginActivity : AppCompatActivity() {

  private lateinit var binding: ActivityLoginBinding
  private lateinit var oAuth: OAuth

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    binding = ActivityLoginBinding.inflate(layoutInflater)
    oAuth = OAuthFactory.instance()
    setContentView(binding.root)
    limitContainerWidth()
  }

  override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)

    data?.let {
      when (requestCode) {
        0 -> {
          oAuth.exchange(this, data,
            {
              PowerPreference
                .getFileByName(AppContext.PREFS_CREDENTIALS)
                .setBoolean("anonymous", false)

              lifecycleScope.launch(Main) {
                Userinfo.get(this@LoginActivity)?.let {
                  startActivity(Intent(this@LoginActivity, MainActivity::class.java))

                  return@launch finish()
                }
                throw Exception(getString(R.string.login_error_userinfo))
              }
            },
            { "error".log() }
          )
        }
      }
    }
  }

  override fun onResume() {
    super.onResume()
    with(binding) {
      login.setOnClickListener {
        var hostname = hostname.text.toString().trim()

        try {
          if (hostname.isEmpty()) throw Exception(getString(R.string.login_error_hostname))

          Uri.parse(hostname).apply {
            if (!cleartext.isChecked && scheme == "http") {
              throw Exception(getString(R.string.login_error_hostname_https))
            }

            if (scheme == null) {
              hostname = when (cleartext.isChecked) {
                true -> "http://$hostname"
                false -> "https://$hostname"
              }
            }
          }

          hostnameField.error = ""

          when (anonymous.isChecked) {
            false -> authedLogin(hostname)
            true -> anonymousLogin(hostname)
          }
        } catch (e: Exception) {
          val message =
            if (e.message?.isEmpty() == true) getString(R.string.login_error_hostname)
            else e.message

          hostnameField.error = message
        }
      }
    }
  }

  override fun onConfigurationChanged(newConfig: Configuration) {
    super.onConfigurationChanged(newConfig)

    limitContainerWidth()
  }

  private fun authedLogin(hostname: String) {
    PowerPreference.getFileByName(AppContext.PREFS_CREDENTIALS).setString("hostname", hostname)
    oAuth.init(hostname)
    oAuth.register {
      oAuth.authorize(this)
    }
  }

  private fun anonymousLogin(hostname: String) {
    val dialog = LoginDialog().apply {
      show(supportFragmentManager, "LoginDialog")
    }

    lifecycleScope.launch(Main) {
      try {
        val (_, _, result) = Fuel.get("$hostname/api/v1/tracks/")
          .awaitObjectResponseResult(gsonDeserializerOf(FwCredentials::class.java))

        when (result) {
          is Result.Success -> {
            PowerPreference.getFileByName(AppContext.PREFS_CREDENTIALS).apply {
              setString("hostname", hostname)
              setBoolean("anonymous", true)
            }

            dialog.dismiss()
            startActivity(Intent(this@LoginActivity, MainActivity::class.java))
            finish()
          }

          is Result.Failure -> {
            dialog.dismiss()

            binding.hostnameField.error = result.error.localizedMessage
          }
        }
      } catch (e: Exception) {
        dialog.dismiss()

        val message =
          if (e.message?.isEmpty() == true) getString(R.string.login_error_hostname)
          else e.message

        binding.hostnameField.error = message
      }
    }
  }

  private fun limitContainerWidth() {
    binding.container.doOnLayout {
      if (resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE && binding.container.width >= 1440) {
        binding.container.layoutParams.width = 1440
      } else {
        binding.container.layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT
      }

      binding.container.requestLayout()
    }
  }
}