use openworm::net::{CreateAccount, CreateAccountResp, Login, LoginResp};

use crate::{
    data::{AccountInfo, ClientData, ServerInfo, ServerList},
    net::{ConnectInfo, NetHandle},
    session::Session,
};

use super::*;

pub fn start(rsc: &mut Rsc, data: &ClientData) -> WeakWidget {
    let mut accounts = Span::empty(Dir::DOWN);

    let accts = data.accounts();
    if accts.is_empty() {
        accounts.push(
            wtext("no accounts")
                .size(20)
                .center_text()
                .color(Color::GRAY)
                .height(60)
                .add_strong(rsc),
        );
    } else {
        for account in accts.iter() {
            let button = Button::new_fg(
                wtext(&account.username)
                    .size(20)
                    .center_text()
                    .height(60)
                    .add(rsc),
                color::DARK,
                rsc,
            )
            .add(rsc);
            let account = account.clone();
            let cert_hex = data
                .data
                .load::<ServerList>()
                .get(&account.url)
                .unwrap()
                .cert_hex
                .clone();
            let cert = decode_hex(&cert_hex).unwrap();
            keyring::use_native_store(true).unwrap();
            rsc.events.register(button, Submit, move |ctx, rsc| {
                let account = account.clone();
                let cert = cert.clone();
                let password = ctx.state.data.password(&account);
                rsc.spawn_task(async move |mut ctx| {
                    let mut fail = |reason: &str| {
                        let reason = reason.to_string();
                        ctx.update(move |ctx, rsc| {
                            ctx.error(&reason, rsc);
                        })
                    };
                    let con = match NetHandle::connect(
                        async |msg| {
                            println!("msg recv :joy:");
                        },
                        ConnectInfo {
                            url: account.url.clone(),
                            cert,
                        },
                    )
                    .await
                    {
                        Ok(v) => v,
                        Err(e) => {
                            return fail(&e);
                        }
                    };

                    let Ok(resp) = con
                        .request(Login {
                            username: account.username.clone(),
                            password: password.clone(),
                        })
                        .await
                    else {
                        return fail("failed to create account");
                    };
                    let user_id = match resp {
                        LoginResp::Ok { id } => id,
                        LoginResp::UnknownUsername => {
                            return fail("unknown username");
                        }
                        LoginResp::InvalidPassword => {
                            return fail("invalid password");
                        }
                    };
                    let session = Session { con, user_id };
                    ctx.update(move |ctx, rsc| {
                        main_view(rsc, session).set_ptr(ctx.main_ui, rsc);
                    });
                });
            });
            accounts.push(button.add_strong(rsc));
        }
    }

    let connect = Button::submit("connect", rsc);
    let create = Button::submit("create", rsc);
    rsc.events.register(connect, Submit, move |_, rsc| {
        connect.disable(rsc);
        create.disable(rsc);
    });

    rsc.events.register(create, Submit, move |ctx, rsc| {
        create_account(rsc).set_ptr(ctx.state.main_ui, rsc);
    });

    (
        wtext("Select Account").text_align(Align::CENTER).size(30),
        accounts,
        (connect, create).span(Dir::RIGHT).gap(10),
    )
        .span(Dir::DOWN)
        .gap(30)
        .modal(400)
        .add(rsc)
}

pub fn create_account(rsc: &mut Rsc) -> WeakWidget {
    let url = field("", "server").add(rsc);
    let token = field("", "account creation token").add(rsc);
    let cert = field("", "certificate hex").add(rsc);
    let username = field("", "username").add(rsc);
    let password = field("", "password").add(rsc);

    let create = Button::submit("create", rsc);
    rsc.events.register(create, Submit, move |ctx, rsc| {
        let url = rsc[url].content().trim().to_string();
        let token = rsc[token].content().trim().to_string();
        let cert_hex = rsc[cert].content().trim().to_string();
        let Some(cert) = decode_hex(&cert_hex) else {
            rsc[ctx.state.notif].inner = Some(werror("Invalid certificate hex", rsc));
            return;
        };
        let username = rsc[username].content();
        let password = rsc[password].content();

        create.disable(rsc);
        rsc.spawn_task(async move |mut ctx| {
            let mut fail = |reason: &str| {
                let reason = reason.to_string();
                ctx.update(move |ctx, rsc| {
                    ctx.error(&reason, rsc);
                    create.enable(rsc);
                })
            };
            keyring::use_native_store(true).unwrap();
            let con = match NetHandle::connect(
                async |msg| {
                    println!("msg recv :joy:");
                },
                ConnectInfo {
                    url: url.clone(),
                    cert,
                },
            )
            .await
            {
                Ok(v) => v,
                Err(e) => {
                    return fail(&e);
                }
            };

            let Ok(resp) = con
                .request(CreateAccount {
                    username: username.clone(),
                    password: password.clone(),
                    token,
                })
                .await
            else {
                return fail("failed to create account");
            };
            let user_id = match resp {
                CreateAccountResp::Ok { id } => id,
                CreateAccountResp::UsernameExists => {
                    return fail("username already exists");
                }
                CreateAccountResp::InvalidToken => {
                    return fail("invalid account token");
                }
            };
            let session = Session { con, user_id };
            ctx.update(move |ctx, rsc| {
                main_view(rsc, session).set_ptr(ctx.main_ui, rsc);
                ctx.data.create_account(
                    ServerInfo { cert_hex },
                    AccountInfo { url, username },
                    &password,
                );
            });
        });
    });

    (
        wtext("Create Account").text_align(Align::CENTER).size(30),
        field_box(url),
        field_box(token),
        field_box(cert),
        field_box(username),
        field_box(password),
        create,
    )
        .span(Dir::DOWN)
        .gap(15)
        .modal(400)
        .add(rsc)
}

pub fn decode_hex(s: &str) -> Option<Vec<u8>> {
    if !s.len().is_multiple_of(2) {
        return None;
    }
    (0..s.len())
        .step_by(2)
        .map(|i| u8::from_str_radix(&s[i..i + 2], 16).ok())
        .collect()
}