import 'package:flutter/material.dart';
import 'package:servermanager/pages/Constants.dart';
import 'package:servermanager/structs/credentials.dart';
import 'package:servermanager/structs/settings.dart';

class AccessControlListPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return AccessControlState();
  }
}

class AccessControlState extends State<AccessControlListPage> {
  Settings settings = Settings();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Conan Exiles Server Manager - ACL Editor"),
        backgroundColor: Constants.TITLEBAR_COLOR,
      ),
      floatingActionButton: ElevatedButton(
        onPressed: () async {
          // Show the add new user page
          var reply = await Navigator.pushNamed(context, "/acl/edit");
          if (reply == null) return;
          if (reply is User) {
            setState(() {
              settings.inst!.admins.add(reply);
            });
          }
        },
        child: Icon(Icons.add),
      ),
      body: Padding(
          padding: EdgeInsets.all(8),
          child: ListView.builder(
            itemBuilder: (ctx, index) {
              User user = settings.inst!.admins[index];
              return ListTile(
                title: Text(user.name),
                subtitle: Text("Access Level: ${user.permissions.name}"),
                onTap: () async {
                  var edited = await Navigator.pushNamed(context, "/acl/edit",
                      arguments: user);
                  if (edited == null) return;

                  if (edited is bool) {
                    settings.inst!.admins.remove(user);
                    setState(() {});
                    return;
                  }

                  setState(() {
                    settings.inst!.admins[index] = edited as User;
                  });
                },
              );
            },
            itemCount: settings.inst!.admins.length,
          )),
    );
  }
}

class ACLEdit extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return ACLEditorState();
  }
}

class ACLEditorState extends State<ACLEdit> {
  Settings settings = Settings();
  var newUser = false;
  TextEditingController username = TextEditingController();
  TextEditingController password = TextEditingController();
  var canDelete = true;

  User? current;

  @override
  void didChangeDependencies() {
    var args = ModalRoute.of(context)!.settings.arguments;
    if (args == null) {
      newUser = true;
      canDelete = false;
    } else {
      User usr = args as User;

      username.text = usr.name;
      current = usr;
      canDelete = true;

      if (usr.permissions == UserLevel.Super_User) canDelete = false;
    }

    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          "CE SM - ACL Edit - ${newUser ? "Create A User" : "Edit User - ${username.text}"}",
        ),
        backgroundColor: Constants.TITLEBAR_COLOR,
      ),
      floatingActionButton: ElevatedButton(
        onPressed: () {
          User? user;
          if (!newUser) {
            if (password.text.isEmpty) {
              user = User(
                name: username.text,
                passwordHash: current!.passwordHash,
                passwordSalt: current!.passwordSalt,
                permissions: current!.permissions,
                userHash: User.generateValidityCode(
                  username.text,
                  current!.passwordHash,
                  current!.passwordSalt,
                  current!.permissions,
                ),
              );
            } else {
              user = User.make(
                username.text,
                password.text,
                UserLevel.Administrator,
              );
            }
          } else {
            user = User.make(
              username.text,
              password.text,
              UserLevel.Administrator,
            );
          }

          Navigator.pop(context, user);
        },
        child: Text("Save"),
      ),
      body: Padding(
        padding: EdgeInsets.all(8),
        child: SingleChildScrollView(
          child: Column(
            children: [
              Row(
                children: [
                  SizedBox(
                    width: 150,
                    child: ListTile(
                      title: Text("Username"),
                    ),
                  ),
                  Expanded(
                    child: TextField(
                      controller: username,
                    ),
                  ),
                ],
              ),
              if (!newUser)
                ListTile(
                  title: Text("Warning"),
                  subtitle: Text(
                    "The password is encrypted, if you wish to change the password do so below, but the field is intentionally not filled in. If left blank, it will remain unchanged.",
                  ),
                  tileColor: Constants.TITLEBAR_COLOR,
                ),
              Row(
                children: [
                  SizedBox(
                    width: 150,
                    child: ListTile(
                      title: Text("Password"),
                    ),
                  ),
                  Expanded(
                    child: TextField(
                      controller: password,
                      obscureText: true,
                    ),
                  ),
                ],
              ),
              SizedBox(
                height: 50,
              ),
              if (canDelete)
                ListTile(
                  title: Text("DELETE USER"),
                  leading: Icon(Icons.delete),
                  tileColor: Constants.TITLEBAR_COLOR,
                  subtitle: Text("Delete the current user entirely"),
                  onTap: () {
                    Navigator.pop(context, false);
                  },
                ),
            ],
          ),
        ),
      ),
    );
  }
}