import 'package:bus_infotainment/singletons/live_information.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:url_launcher/url_launcher_string.dart';

class pages_Settings extends StatefulWidget {

  @override
  State<pages_Settings> createState() => _pages_SettingsState();
}

class _pages_SettingsState extends State<pages_Settings> {

  @override
  Widget build(BuildContext context) {

    if (LiveInformation().auth.isAuthenticated()){
      return Container(



      );
    } else {
      return _LoginPage(
        onLogin: () {

        },
      );
    }
  }
}

enum _LoginType {
  login,
  signup
}


class _LoginPage extends StatefulWidget {

  _LoginType type = _LoginType.login;

  final Function() onLogin;

  _LoginPage({super.key, required this.onLogin, });

  @override
  State<_LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<_LoginPage> {


  @override
  Widget build(BuildContext context) {
    return Container(
      color: Color.fromRGBO(19, 19, 19, 1),

      padding: const EdgeInsets.symmetric(horizontal: 32),

      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [

          // Login form
          widget.type == _LoginType.login ?
          LoginForm(
            handleSubmit: (form) {
              print("Login form submitted");

              LiveInformation().auth.createEmailSession(
                  email: form.emailController.text,
                  password: form.passwordController.text
              ).then((value) {
                widget.onLogin();
              });

            },
            requestSignup: () {
              setState(() {
                widget.type = _LoginType.signup;
              });
            },
          ) :
          SignupForm(
            handleSubmit: (form) {
              print("Signup form submitted");

              LiveInformation().auth.createUser(
                  displayName: form.dispnameController.text,
                  username: form.usernameController.text,
                  email: form.emailController.text,
                  password: form.passwordController.text
              ).then((value) {
                // login
                LiveInformation().auth.createEmailSession(
                    email: form.emailController.text,
                    password: form.passwordController.text
                ).then((value) {
                  widget.onLogin();
                });
              });

            },
            requestSignin: () {
              setState(() {
                widget.type = _LoginType.login;
              });
            },
          ),


        ],
      ),
    );
  }
}

class LoginForm extends StatefulWidget {

  final Function(LoginForm) handleSubmit;

  final Function() requestSignup;

  /* TextControllers */
  final TextEditingController emailController = TextEditingController();

  final TextEditingController passwordController = TextEditingController();


  LoginForm({super.key, required this.handleSubmit, required this.requestSignup});

  @override
  State<LoginForm> createState() => _LoginFormState();
}

class _LoginFormState extends State<LoginForm> {


  @override
  Widget build(BuildContext context) {
    return Container(

        child: Column(

          crossAxisAlignment: CrossAxisAlignment.start,

          children: [

            Text(
                "Sign In",
                style: GoogleFonts.montserrat(
                    fontSize: 32,
                    fontWeight: FontWeight.bold,
                    color: Colors.white,
                    letterSpacing: -1
                )
            ),

            SizedBox(height: 20),

            PW_TextField(
                title: "Email",
                controller: widget.emailController,
                handleSubmit: (form) {
                  print("Signup form submitted");
                  widget.handleSubmit(widget);
                }
            ),

            SizedBox(height: 20),

            PW_TextField(
                title: "Password",
                obscure: true,
                controller: widget.passwordController,
                handleSubmit: (form) {
                  print("Signup form submitted");
                  widget.handleSubmit(widget);
                }
            ),

            SizedBox(height: 20),

            ElevatedButton(
                onPressed: (){
                  widget.handleSubmit(widget);
                },

                // make the corner radius 4, background color match the theme, and text colour white, fill to width of parent
                style: ElevatedButton.styleFrom(
                    backgroundColor: Theme.of(context).colorScheme.primary,
                    foregroundColor: Colors.white,
                    shape: RoundedRectangleBorder(
                        borderRadius: BorderRadius.circular(4)
                    ),
                    minimumSize: Size(double.infinity, 48)
                ),

                child: Text(
                    "Sign in",
                    style: GoogleFonts.interTight(
                        fontSize: 15,
                        fontWeight: FontWeight.w600,
                        color: Colors.white,
                        letterSpacing: 0.5
                    )
                )
            ),

            SizedBox(height: 20),

            Row(

              mainAxisAlignment: MainAxisAlignment.center,

              children: [

                TextButton(
                    onPressed: (){

                    },

                    // Make border radius 4, background transparent, and text colour white
                    style: TextButton.styleFrom(
                        shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(4)
                        ),
                        backgroundColor: Colors.transparent
                    ),

                    child: Text(
                      "Forgot password?",

                      style: GoogleFonts.interTight(
                          fontSize: 15,
                          fontWeight: FontWeight.w400,
                          color: Colors.grey.shade400,
                          letterSpacing: 0.5
                      ),

                    )
                ),

                Container(
                  width: 1,
                  height: 24,
                  margin: const EdgeInsets.symmetric(horizontal: 8),
                  color: Colors.grey.shade800,
                ),

                TextButton(
                    onPressed: (){
                      widget.requestSignup();
                    },

                    // Make border radius 4, background transparent, and text colour white
                    style: TextButton.styleFrom(
                        shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(4)
                        ),
                        backgroundColor: Colors.transparent
                    ),

                    child: Text(
                      "Sign Up",

                      style: GoogleFonts.interTight(
                          fontSize: 15,
                          fontWeight: FontWeight.w400,
                          color: Colors.grey.shade400,
                          letterSpacing: 0.5
                      ),

                    )
                ),

              ],

            ),



          ],
        )

    );
  }
}

class SignupForm extends StatelessWidget {

  final Function(SignupForm) handleSubmit;

  final Function() requestSignin;

  /* TextControllers */
  final TextEditingController dispnameController = TextEditingController();
  final TextEditingController usernameController = TextEditingController();
  final TextEditingController emailController = TextEditingController();
  final TextEditingController passwordController = TextEditingController();
  final TextEditingController confirmPasswordController = TextEditingController();

  SignupForm({super.key, required this.handleSubmit, required this.requestSignin});

  @override
  Widget build(BuildContext context) {
    return Container(

        child: Column(

          crossAxisAlignment: CrossAxisAlignment.start,

          children: [

            Text(
                "Sign Up",
                style: GoogleFonts.montserrat(
                    fontSize: 32,
                    fontWeight: FontWeight.bold,
                    color: Colors.white,
                    letterSpacing: -1
                )
            ),

            SizedBox(height: 20),

            PW_TextField(
                title: "Display Name",
                controller: dispnameController,
                handleSubmit: (form) {
                  print("Signup form submitted");
                  handleSubmit(this);
                }
            ),

            SizedBox(height: 20),

            PW_TextField(
                title: "Username",
                controller: usernameController,
                handleSubmit: (form) {
                  print("Signup form submitted");
                  handleSubmit(this);
                }
            ),

            SizedBox(height: 20),

            PW_TextField(
                title: "Email",
                controller: emailController,
                handleSubmit: (form) {
                  print("Signup form submitted");
                  handleSubmit(this);
                }
            ),

            SizedBox(height: 20),

            PW_TextField(
                title: "Password",
                obscure: true,
                controller: passwordController,
                handleSubmit: (form) {
                  print("Signup form submitted");
                  handleSubmit(this);
                }
            ),

            SizedBox(height: 20),

            PW_TextField(
                title: "Confirm Password",
                obscure: true,
                controller: confirmPasswordController,
                handleSubmit: (form) {
                  print("Signup form submitted");
                  handleSubmit(this);
                }
            ),

            SizedBox(height: 20),

            // Terms and conditions with hyperlink to terms and conditions, with checkbox
            // use TextSpan
            // use check box

            Row(
              children: [
                Checkbox(
                  value: false,
                  onChanged: (value) {
                    print("Checkbox changed to $value");
                  },
                ),
                Expanded(
                  child: RichText(
                    // wrap text
                    text: TextSpan(
                      children: [
                        TextSpan(
                          text: "By registering, you agree to our ",
                          style: GoogleFonts.interTight(
                            fontSize: 15,
                            fontWeight: FontWeight.w400,
                            color: Colors.grey.shade400,
                            letterSpacing: 0.5,
                          ),
                        ),
                        TextSpan(
                          text: "Terms and Conditions",
                          style: GoogleFonts.interTight(
                            fontSize: 15,
                            fontWeight: FontWeight.w400,
                            color: Colors.grey.shade400,
                            letterSpacing: 0.5,
                            decoration: TextDecoration.underline,
                          ),
                          recognizer: new TapGestureRecognizer()
                            ..onTap = () {
                              launchUrlString("https://google.co.uk/");
                            },
                        ),
                      ],
                    ),
                  ),
                ),
              ],
            ),

            SizedBox(height: 20),

            ElevatedButton(
                onPressed: (){
                  handleSubmit(this);
                },

                // make the corner radius 4, background color match the theme, and text colour white, fill to width of parent
                style: ElevatedButton.styleFrom(
                    backgroundColor: Theme.of(context).colorScheme.primary,
                    foregroundColor: Colors.white,
                    shape: RoundedRectangleBorder(
                        borderRadius: BorderRadius.circular(4)
                    ),
                    minimumSize: Size(double.infinity, 48)
                ),

                child: Text(
                    "Sign up",
                    style: GoogleFonts.interTight(
                        fontSize: 15,
                        fontWeight: FontWeight.w600,
                        color: Colors.white,
                        letterSpacing: 0.5
                    )
                )
            ),

            SizedBox(height: 20),

            // Already have an account? Sign in

            Row(

              mainAxisAlignment: MainAxisAlignment.center,

              children: [

                Text(
                  "Already have an account? ",
                  style: GoogleFonts.interTight(
                    fontSize: 15,
                    fontWeight: FontWeight.w400,
                    color: Colors.grey.shade400,
                    letterSpacing: 0.5,
                  ),
                ),

                TextButton(
                    onPressed: (){
                      requestSignin();
                    },

                    // Make border radius 4, background transparent, and text colour white
                    style: TextButton.styleFrom(
                        shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(4)
                        ),
                        backgroundColor: Colors.transparent
                    ),

                    child: Text(
                      "Sign in",

                      style: GoogleFonts.interTight(
                          fontSize: 15,
                          fontWeight: FontWeight.w400,
                          color: Colors.grey.shade400,
                          letterSpacing: 0.5
                      ),

                    )
                ),

              ],

            ),

          ],
        )

    );
  }

}

class PW_TextField extends StatelessWidget {

  String title = "field";
  bool obscure = false;
  bool longText = false;

  late TextEditingController controller;

  Function(String)? handleTapOutside;
  Function(String)? handleEditingComplete;
  Function(String)? handleChanged;
  Function(String)? handleSubmit;

  PW_TextField({super.key, this.title = "field", required this.controller, this.obscure = false, this.longText = false, this.handleSubmit, this.handleTapOutside, this.handleEditingComplete, this.handleChanged});

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Column(

      crossAxisAlignment: CrossAxisAlignment.start,

      children: [

        Text(
            title,
            style: GoogleFonts.interTight(
                fontSize: 15,
                fontWeight: FontWeight.w400,
                color: Colors.grey.shade300,
                letterSpacing: 0.1
            )
        ),

        SizedBox(height: 4),

        // field with uniform padding and margin
        SizedBox(

          child: TextField(

            onEditingComplete: () {
              if (handleEditingComplete != null) {
                handleEditingComplete!(controller.text);
              }
            },

            onChanged: (value) {
              if (handleChanged != null) {
                handleChanged!(controller.text);
              }
            },

            onSubmitted: (value) {
              if (handleSubmit != null) {
                handleSubmit!(controller.text);
              }
            },

            onTapOutside: (value) {
              if (handleTapOutside != null) {
                handleTapOutside!(controller.text);
              }
            },

            decoration: InputDecoration(
              contentPadding: const EdgeInsets.all(12),
              isDense: true,
              border: OutlineInputBorder(
                borderRadius: BorderRadius.circular(4),

              ),
              filled: true,
              // fillColor: STUDIOS_DEFAULT_BACKGROUND_COLOR,
              hintText: title,
              hintStyle: GoogleFonts.interTight(
                  fontSize: 15,
                  fontWeight: FontWeight.w400,
                  color: Colors.grey.shade700,
                  letterSpacing: 0.1
              ),

            ),

            // wrap text
            minLines: longText ? 3 : 1,
            maxLines: longText ? null : 1,
            keyboardType: TextInputType.multiline,

            obscureText: obscure,

            style: GoogleFonts.interTight(
              fontSize: 15,
              fontWeight: FontWeight.w400,
              color: Colors.grey.shade300,
              letterSpacing: 0.1,
            ),

            controller: controller,
          ),
        )


      ],

    );
  }

}