StandAPP/app/src/main/java/com/stand/standapp/LoginActivity.kt

package com.stand.standapp

import android.content.Intent
import android.os.Bundle
import timber.log.Timber
import android.widget.*
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import okhttp3.*
import okhttp3.MediaType.Companion.toMediaType
import org.json.JSONObject
import java.io.IOException

class LoginActivity : AppCompatActivity() {

    private val client = OkHttpClient()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_login)

        val etUsername = findViewById<EditText>(R.id.et_username)
        val etPassword = findViewById<EditText>(R.id.et_password)
        val cbRemember = findViewById<CheckBox>(R.id.cb_remember)
        val btnLogin = findViewById<Button>(R.id.btn_login)
        val btnPttExample = findViewById<Button>(R.id.btn_ptt_example)
        val ivSettings = findViewById<ImageView>(R.id.iv_settings)

        // 1. 加载保存的状态和凭据
        val isRemember = AppConfig.isRememberLogin(this)
        cbRemember.isChecked = isRemember
        if (isRemember) {
            etUsername.setText(AppConfig.getSavedUsername(this))
            etPassword.setText(AppConfig.getSavedPassword(this))
        }

        // 2. 服务器配置图标点击事件
        ivSettings.setOnClickListener {
            showServerConfigDialog()
        }

        // 3. 登录按钮点击事件
        btnLogin.setOnClickListener {
            val username = etUsername.text.toString().trim()
            val password = etPassword.text.toString().trim()

            if (username.isEmpty() || password.isEmpty()) {
                Toast.makeText(this, "请输入账号和密码", Toast.LENGTH_SHORT).show()
                return@setOnClickListener
            }

            // 执行真实接口登录
            performLogin(username, password, cbRemember.isChecked)
        }

        // 4. PTT 示例按钮点击事件
        btnPttExample.setOnClickListener {
            try {
                val intent = Intent(this, com.example.kingway.ptt.pttActivity::class.java)
                startActivity(intent)
            } catch (e: Exception) {
                Toast.makeText(this, "打开 PTT 示例失败: ${e.message}", Toast.LENGTH_SHORT).show()
            }
        }
    }

    /**
     * 执行真实接口登录
     */
    private fun performLogin(username: String, password: String, remember: Boolean) {
        val serverUrl = AppConfig.getServerUrl(this)
        val loginUrl = "$serverUrl/api/auth/login"
        val bearerToken = "eyJraWQiOiJzLXYxIiwidHlwIjoiSldUIiwiYWxnIjoiSFMyNTYifQ.eyJzdWIiOiJhZG1pbiIsInR5cCI6ImFjY2VzcyIsImV4cCI6MTc3NjQwMTU2MSwianRpIjoiMjM0NjdiZGMtNTY0Zi00NmY0LWJhZTgtNzJhZmQ1MzhmYmZhIiwiZmdwIjoiY2FhNzYzOTI4YWRhYWZiYjgzMjE3NjExYmVjYTc3ZjMiLCJraWQiOiJzLXYxIn0.4Zf1eiKcUjGNoFylEzmZ2no1kJY-44CQ8QWmMA_UxvY"

        val body = MultipartBody.Builder()
            .setType(MultipartBody.FORM)
            .addFormDataPart("username", username)
            .addFormDataPart("password", password)
            .build()

        val request = Request.Builder()
            .url(loginUrl)
            .post(body)
            .addHeader("Authorization", "Bearer $bearerToken")
            .build()

        val loadingDialog = AlertDialog.Builder(this)
            .setMessage("正在登录...")
            .setCancelable(false)
            .create()
        loadingDialog.show()

        client.newCall(request).enqueue(object : Callback {
            override fun onFailure(call: Call, e: IOException) {
                runOnUiThread {
                    loadingDialog.dismiss()
                    Toast.makeText(this@LoginActivity, "网络异常: ${e.message}", Toast.LENGTH_SHORT).show()
                }
            }

            override fun onResponse(call: Call, response: Response) {
                val responseBody = response.body?.string()
                runOnUiThread {
                    loadingDialog.dismiss()
                    try {
                        val json = JSONObject(responseBody ?: "")
                        val code = json.optInt("code", -1)
                        if (code == 0) {
                            // 登录成功
                            AppConfig.setRememberLogin(this@LoginActivity, remember)
                            if (remember) {
                                AppConfig.setSavedUsername(this@LoginActivity, username)
                                AppConfig.setSavedPassword(this@LoginActivity, password)
                            } else {
                                AppConfig.setSavedUsername(this@LoginActivity, "")
                                AppConfig.setSavedPassword(this@LoginActivity, "")
                            }

                            Toast.makeText(this@LoginActivity, "登录成功", Toast.LENGTH_SHORT).show()
                            startActivity(Intent(this@LoginActivity, MainActivity::class.java))
                            finish()
                        } else {
                            val msg = json.optString("msg", "登录失败")
                            Toast.makeText(this@LoginActivity, msg, Toast.LENGTH_SHORT).show()
                        }
                    } catch (e: Exception) {
                        Timber.tag("Login").e(e, "解析响应失败")
                        Toast.makeText(this@LoginActivity, "服务器响应异常", Toast.LENGTH_SHORT).show()
                    }
                }
            }
        })
    }

    /**
     * 弹出服务器地址配置对话框
     */
    private fun showServerConfigDialog() {
        val container = LinearLayout(this)
        container.orientation = LinearLayout.VERTICAL
        container.setPadding(60, 20, 60, 0)
        
        val editText = EditText(this)
        editText.setText(AppConfig.getServerUrl(this))
        editText.hint = "例如: http://192.168.1.100:8080"
        container.addView(editText)
        
        AlertDialog.Builder(this)
            .setTitle("服务器地址配置")
            .setView(container)
            .setPositiveButton("保存") { _, _ ->
                val newUrl = editText.text.toString().trim()
                if (newUrl.isNotEmpty()) {
                    AppConfig.setServerUrl(this, newUrl)
                    Toast.makeText(this, "服务器配置已更新", Toast.LENGTH_SHORT).show()
                }
            }
            .setNegativeButton("取消", null)
            .show()
    }

    override fun onBackPressed() {
        AlertDialog.Builder(this)
            .setTitle("提示")
            .setMessage("确定要退出应用吗？")
            .setPositiveButton("确定") { _, _ -> 
                @Suppress("DEPRECATION")
                super.onBackPressed() 
            }
            .setNegativeButton("取消", null)
            .show()
    }
}