package com.binbin.androidowner

import android.app.admin.DevicePolicyManager
import android.content.ComponentName
import android.content.Context
import android.content.Intent
import android.widget.Toast
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.selection.SelectionContainer
import androidx.compose.foundation.verticalScroll
import androidx.compose.material3.Button
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.material3.TextField
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.unit.dp
import androidx.core.content.ContextCompat.startActivity


@Composable
fun DpmPermissions(myDpm: DevicePolicyManager, myComponent: ComponentName, myContext:Context){
    //da:DeviceAdmin do:DeviceOwner
    val isda = myDpm.isAdminActive(myComponent)
    val isdo = myDpm.isDeviceOwnerApp("com.binbin.androidowner")
    Column(
        modifier = Modifier
            .padding(8.dp)
            .verticalScroll(rememberScrollState()),
        horizontalAlignment = Alignment.CenterHorizontally
    ) {
        Row(
            modifier = Modifier
                .fillMaxWidth()
                .padding(bottom = 10.dp)
                .clip(RoundedCornerShape(8))
                .background(color = MaterialTheme.colorScheme.primaryContainer)
                .padding(10.dp),
            horizontalArrangement = Arrangement.SpaceBetween,
            verticalAlignment = Alignment.CenterVertically
        ) {
            Column {
                Text(text = "Device Admin", style = MaterialTheme.typography.titleLarge)
                Text(if(isda){"已激活"}else{"未激活"})
            }
            if(isda){
                Button(onClick = {myDpm.removeActiveAdmin(myComponent)}) {
                    Text("撤销")
                }
            }else{
                Button(onClick = { ActivateDeviceAdmin(myDpm, myComponent, myContext) }) {
                    Text("激活")
                }
            }
        }
        Row(
            modifier = Modifier
                .fillMaxWidth()
                .padding(bottom = 10.dp)
                .clip(RoundedCornerShape(8))
                .background(color = MaterialTheme.colorScheme.primaryContainer)
                .padding(10.dp),
            horizontalArrangement = Arrangement.SpaceBetween,
            verticalAlignment = Alignment.CenterVertically
        ) {
            Column {
                Text(text = "Device Owner", style = MaterialTheme.typography.titleLarge)
                Text(if(isda){"已激活"}else{"未激活"})
            }
            if(isdo){
                Button(onClick = {myDpm.clearDeviceOwnerApp("com.binbin.androidowner")}) {
                    Text("撤销")
                }
            }
        }
        if(isdo||isda){Text("注意！在这里撤销权限不会清除配置。比如：被停用的应用会保持停用状态")}
        Spacer(Modifier.padding(5.dp))
        if(!isda){
            SelectionContainer {
                Text("dpm set-active-admin com.binbin.androidowner/com.binbin.androidowner.MyDeviceAdminReceiver")
            }
        }
        if(!isdo){
            SelectionContainer {
                Text("dpm set-device-owner com.binbin.androidowner/com.binbin.androidowner.MyDeviceAdminReceiver")
            }
        }
        if(isdo){
            var lockScrInfo by remember { mutableStateOf("") }
            TextField(value = lockScrInfo, onValueChange = { lockScrInfo= it}, label = { Text("锁屏信息") })
            Spacer(Modifier.padding(5.dp))
            Button(onClick = {myDpm.setDeviceOwnerLockScreenInfo(myComponent,lockScrInfo)}) {
                Text("设置锁屏DeviceOwner信息")
            }
        }
    }
}

fun ActivateDeviceAdmin(myDpm: DevicePolicyManager,myComponent: ComponentName,myContext: Context){
    if (!myDpm.isAdminActive(myComponent)) {
        val intent = Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN)
        intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, myComponent)
        intent.putExtra(
            DevicePolicyManager.EXTRA_ADD_EXPLANATION,
            "在这里激活Android Owner"
        )
        startActivity(myContext,intent,null)
    } else {
        Toast.makeText(myContext, "已经激活", Toast.LENGTH_SHORT).show()
    }
}