import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:url_launcher/url_launcher_string.dart';
import 'package:venera/components/components.dart';
import 'package:venera/foundation/app.dart';
import 'package:venera/foundation/comic_source/comic_source.dart';
import 'package:venera/foundation/state_controller.dart';
import 'package:venera/utils/translations.dart';

class AccountsPageLogic extends StateController {
  final _reLogin = <String, bool>{};
}

class AccountsPage extends StatelessWidget {
  const AccountsPage({super.key});

  AccountsPageLogic get logic => StateController.find<AccountsPageLogic>();

  @override
  Widget build(BuildContext context) {
    var body = StateBuilder<AccountsPageLogic>(
      init: AccountsPageLogic(),
      builder: (logic) {
        return CustomScrollView(
          slivers: [
            SliverAppbar(title: Text("Accounts".tl)),
            SliverList(
              delegate: SliverChildListDelegate(
                buildContent(context).toList(),
              ),
            ),
            SliverPadding(
              padding: EdgeInsets.only(bottom: context.padding.bottom),
            )
          ],
        );
      },
    );

    return Scaffold(
      body: body,
    );
  }

  Iterable<Widget> buildContent(BuildContext context) sync* {
    var sources = ComicSource.all().where((element) => element.account != null);
    if (sources.isEmpty) return;

    for (var element in sources) {
      final bool logged = element.isLogged;
      yield Padding(
        padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
        child: Text(
          element.name,
          style: const TextStyle(fontSize: 16),
        ),
      );
      if (!logged) {
        yield ListTile(
          title: Text("Log in".tl),
          trailing: const Icon(Icons.arrow_right),
          onTap: () async {
            if (element.account!.onLogin != null) {
              await element.account!.onLogin!(context);
            }
            if (element.account!.login != null && context.mounted) {
              await context.to(
                () => _LoginPage(
                  login: element.account!.login!,
                  registerWebsite: element.account!.registerWebsite,
                ),
              );
              element.saveData();
            }
            logic.update();
          },
        );
      }
      if (logged) {
        for (var item in element.account!.infoItems) {
          if (item.builder != null) {
            yield item.builder!(context);
          } else {
            yield ListTile(
              title: Text(item.title.tl),
              subtitle: item.data == null ? null : Text(item.data!()),
              onTap: item.onTap,
            );
          }
        }
        if (element.account!.allowReLogin) {
          bool loading = logic._reLogin[element.key] == true;
          yield ListTile(
            title: Text("Re-login".tl),
            subtitle: Text("Click if login expired".tl),
            onTap: () async {
              if (element.data["account"] == null) {
                context.showMessage(message: "No data".tl);
                return;
              }
              logic._reLogin[element.key] = true;
              logic.update();
              final List account = element.data["account"];
              var res = await element.account!.login!(account[0], account[1]);
              if (res.error) {
                context.showMessage(message: res.errorMessage!);
              } else {
                context.showMessage(message: "Success".tl);
              }
              logic._reLogin[element.key] = false;
              logic.update();
            },
            trailing: loading
                ? const SizedBox.square(
                    dimension: 24,
                    child: CircularProgressIndicator(
                      strokeWidth: 2,
                    ),
                  )
                : const Icon(Icons.refresh),
          );
        }
        yield ListTile(
          title: Text("Exit".tl),
          onTap: () {
            element.data["account"] = null;
            element.account?.logout();
            element.saveData();
            logic.update();
          },
          trailing: const Icon(Icons.logout),
        );
      }
      yield const Divider(thickness: 0.6);
    }
  }

  void setClipboard(String text) {
    Clipboard.setData(ClipboardData(text: text));
    showToast(
      message: "Copied".tl,
      icon: const Icon(Icons.check),
      context: App.rootContext,
    );
  }
}

class _LoginPage extends StatefulWidget {
  const _LoginPage({required this.login, this.registerWebsite});

  final LoginFunction login;

  final String? registerWebsite;

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

class _LoginPageState extends State<_LoginPage> {
  String username = "";
  String password = "";
  bool loading = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const Appbar(
        title: Text(''),
      ),
      body: Center(
        child: Container(
          padding: const EdgeInsets.all(16),
          constraints: const BoxConstraints(maxWidth: 400),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              Text("Login".tl, style: const TextStyle(fontSize: 24)),
              const SizedBox(height: 32),
              TextField(
                decoration: InputDecoration(
                  labelText: "Username".tl,
                  border: const OutlineInputBorder(),
                ),
                onChanged: (s) {
                  username = s;
                },
              ),
              const SizedBox(height: 16),
              TextField(
                decoration: InputDecoration(
                  labelText: "Password".tl,
                  border: const OutlineInputBorder(),
                ),
                obscureText: true,
                onChanged: (s) {
                  password = s;
                },
                onSubmitted: (s) => login(),
              ),
              const SizedBox(height: 32),
              Button.filled(
                isLoading: loading,
                onPressed: login,
                child: Text("Continue".tl),
              ),
              const SizedBox(height: 32),
              if (widget.registerWebsite != null)
                TextButton(
                  onPressed: () => launchUrlString(widget.registerWebsite!),
                  child: Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      const Icon(Icons.link),
                      const SizedBox(width: 8),
                      Text("Create Account".tl),
                    ],
                  ),
                ),
            ],
          ),
        ),
      ),
    );
  }

  void login() {
    if (username.isEmpty || password.isEmpty) {
      showToast(
        message: "Cannot be empty".tl,
        icon: const Icon(Icons.error_outline),
        context: context,
      );
      return;
    }
    setState(() {
      loading = true;
    });
    widget.login(username, password).then((value) {
      if (value.error) {
        context.showMessage(message: value.errorMessage!);
        setState(() {
          loading = false;
        });
      } else {
        if (mounted) {
          context.pop();
        }
      }
    });
  }
}