use std::collections::HashSet;

use chrono_tz::Europe::Berlin;
use gloo_net::http::Request;
use serde::{Deserialize, Serialize};
use wasm_bindgen::JsCast;
use wasm_bindgen_futures::spawn_local;
use web_sys::HtmlSelectElement;
use yew::prelude::*;
use yew_router::prelude::*;

/// A hardcoded list of valid room numbers for ticket submissions.
///
/// This array contains `i16` values representing valid rooms. Negative numbers typically
/// denote rooms prefixed with 'K' (e.g., -1 for K1), and numbers greater than or equal to 1000
/// denote rooms prefixed with 'D' (e.g., 1001 for D1).
///
/// This list is used for client-side validation of room input during ticket creation.
const VALID_ROOMS: &[i16] = &[
    1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30,
    32, 34, 36, 37, 39, 41, 49, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113,
    118, 120, 121, 122, 123, 124, 126, 127, 128, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142,
    143, 144, 145, 146, 147, 148, 150, 152, 153, 154, 155, 156, 157, 158, 159, 160, 201, 202, 203,
    204, 205, 206, 207, 208, 209, 210, 211, 212, 214, 1001, 1002, 1003, -1, -2, -3, -4, -5, -6, -7,
    -8,
];

/// Data transfer object (DTO) for creating a new ticket.
///
/// This struct defines the payload sent to the backend when a user submits a new ticket.
/// It includes all necessary information for initial ticket creation.
///
/// # Fields
/// - `category`: The category of the ticket (e.g., "Internet", "Hardware").
/// - `betreff`: The subject or brief summary of the ticket.
/// - `description`: A detailed description of the issue or request.
/// - `room`: The room number where the issue is located.
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
pub struct TicketCreateScheme {
    pub category: String,
    pub betreff: String,
    pub description: String,
    pub room: i16,
}

/// Data transfer object (DTO) for updating a ticket's status.
///
/// This struct is used when sending a request to the backend to change the status
/// of an existing ticket.
///
/// # Fields
/// - `status`: The new status of the ticket (e.g., "ToDo", "InProgress", "Completed", "Archived").
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
pub struct TicketUpdateScheme {
    pub status: String,
}

/// Represents a complete ticket entity retrieved from the backend.
///
/// This struct holds all details of a ticket, including its metadata, content,
/// and associated user information.
///
/// # Fields
/// - `id`: The unique identifier of the ticket.
/// - `category`: The category of the ticket.
/// - `betreff`: The subject of the ticket.
/// - `description`: The detailed description of the ticket.
/// - `room`: The room number associated with the ticket.
/// - `status`: The current status of the ticket.
/// - `date`: The creation date and time of the ticket in UTC.
/// - `user_id`: The ID of the user who created the ticket.
/// - `user_first_name`: The first name of the user who created the ticket.
/// - `user_last_name`: The last name of the user who created the ticket.
#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
pub struct Ticket {
    pub id: i32,
    pub category: String,
    pub betreff: String,
    pub description: String,
    pub room: i16,
    pub status: String,
    pub date: chrono::DateTime<chrono::Utc>,
    pub user_id: i16,
    pub user_first_name: String,
    pub user_last_name: String,
}

/// Properties for components that display a single ticket.
///
/// This struct is used to pass the ID of a specific ticket to components
/// that need to fetch or display its details.
///
/// # Fields
/// - `id`: The unique identifier of the ticket to be displayed.
#[derive(Properties, PartialEq)]
pub struct TicketProps {
    pub id: i32,
}

/// Represents the essential information of the currently authenticated user.
///
/// This struct is used to hold a subset of user data relevant for client-side
/// logic, such as determining if the user is an administrator or filtering
/// tickets by their ID.
///
/// # Fields
/// - `id`: An `Option<i16>` holding the unique ID of the active user. `None` if not authenticated or ID is unavailable.
/// - `is_admin`: A boolean indicating if the active user has administrator privileges.
#[derive(Clone, Debug, PartialEq)]
pub struct ActiveUser {
    pub id: Option<i16>,
    pub is_admin: bool,
}

/// Represents a standardized error response from the API.
///
/// This struct is used to deserialize error messages returned by the backend API,
/// providing a consistent way to handle and display error information to the user.
///
/// # Fields
/// - `message`: A descriptive error message.
/// - `_status`: (Ignored) The HTTP status code or a status string from the API.
#[derive(Deserialize, Debug)]
struct ApiError {
    message: String,
    _status: String,
}

/// A component that provides a form for users to submit new tickets.
///
/// This component allows users to input details such as category, subject (`betreff`),
/// description, and room number for a new support ticket. It includes client-side
/// validation for the room number and interacts with the backend API to create the ticket.
///
/// # State
/// Uses `use_state` hooks to manage:
/// - `category`, `betreff`, `description`: Values of the form input fields.
/// - `room`, `room_input`: The parsed and raw room numbers, respectively.
/// - `status`: To display messages about submission success or errors.
///
/// # Room Input Handling
/// The `room_change` callback handles parsing the room input:
/// - Supports numerical room numbers (e.g., "101").
/// - Supports 'K' prefixed rooms (e.g., "K1" parses to -1).
/// - Supports 'D' prefixed rooms (e.g., "D1" parses to 1001).
/// - Validates the parsed room against the `VALID_ROOMS` constant.
///
/// # Form Submission
/// - Prevents default form submission behavior.
/// - Performs validation for room number and presence in `VALID_ROOMS`.
/// - Constructs a `TicketCreateScheme` payload.
/// - Sends a POST request to `/api/tickets/create`.
/// - Updates the `status` state based on the API response.
///
/// # Example
/// ```rust
/// html! {
///     <SubmitTicket />
/// }
/// ```
#[component(SubmitTicket)]
pub fn submit_ticket_component() -> Html {
    let category = use_state(|| "".to_string());
    let betreff = use_state(|| "".to_string());
    let description = use_state(|| "".to_string());
    let room = use_state(|| None::<i16>);
    let room_input = use_state(|| "".to_string());
    let status = use_state(|| None::<String>);

    let valid_rooms: HashSet<i16> = VALID_ROOMS.iter().copied().collect();

    let onsubmit = {
        let category = category.clone();
        let betreff = betreff.clone();
        let description = description.clone();
        let room = room.clone();
        let status = status.clone();
        let valid_rooms = valid_rooms.clone();

        Callback::from(move |e: SubmitEvent| {
            e.prevent_default();
            if room.is_none() {
                status.set(Some("Invalid room".into()));
                return;
            }
            let category = (*category).clone();
            let betreff = (*betreff).clone();
            let description = (*description).clone();
            let room = room.unwrap();
            if !valid_rooms.contains(&room) {
                status.set(Some("Room not allowed".into()));
                return;
            }
            let status = status.clone();

            spawn_local(async move {
                let payload = TicketCreateScheme {
                    category,
                    betreff,
                    description,
                    room,
                };

                let request = Request::post("/api/tickets/create")
                    .header("Content-Type", "application/json")
                    .credentials(web_sys::RequestCredentials::Include)
                    .json(&payload)
                    .expect("Failed to build request");

                match request.send().await {
                    Ok(response) if response.status() == 200 => status.set(Some("Success".into())),
                    Ok(response) => status.set(Some(format!("Error: {}", response.status()))),
                    Err(err) => status.set(Some(format!("Network error: {}", err))),
                }
            });
        })
    };

    let category_change = {
        let category = category.clone();
        Callback::from(move |e: Event| {
            let input: web_sys::HtmlSelectElement = e.target_unchecked_into();
            category.set(input.value());
        })
    };

    let betreff_change = {
        let betreff = betreff.clone();
        Callback::from(move |e: InputEvent| {
            let input: web_sys::HtmlInputElement = e.target_unchecked_into();
            betreff.set(input.value());
        })
    };

    let description_change = {
        let description = description.clone();
        Callback::from(move |e: InputEvent| {
            let input: web_sys::HtmlInputElement = e.target_unchecked_into();
            description.set(input.value());
        })
    };

    let room_change = {
        let room = room.clone();
        let room_input = room_input.clone();
        Callback::from(move |e: InputEvent| {
            let input: web_sys::HtmlInputElement = e.target_unchecked_into();
            let raw = input.value();
            room_input.set(raw.clone());

            let parsed_value: Option<i16> = if raw.trim().is_empty() {
                None
            } else {
                let raw_trim = raw.trim();
                if raw_trim.len() > 1 && (raw_trim.starts_with('K') || raw_trim.starts_with('k')) {
                    match raw_trim[1..].parse::<i16>() {
                        Ok(n) => Some(-n),
                        Err(_) => None,
                    }
                } else if raw_trim.len() > 1
                    && (raw_trim.starts_with('D') || raw_trim.starts_with('d'))
                {
                    match raw_trim[1..].parse::<i16>() {
                        Ok(n) => Some(1000 + n),
                        Err(_) => None,
                    }
                } else {
                    match raw_trim.parse::<i16>() {
                        Ok(n) => Some(n),
                        Err(_) => None,
                    }
                }
            };

            if let Some(v) = parsed_value {
                if !valid_rooms.contains(&v) {
                    room.set(None);
                } else {
                    room.set(Some(v));
                }
            } else {
                room.set(None);
            }
        })
    };

    let room_valid = (*room).is_some();

    html! {
        <form class="rundbg" {onsubmit}>
            <label>{ "Betreff:" }
                <input type="text" value={(*betreff).clone()} oninput={betreff_change}/>
            </label>
            <br/>
            <label>{ "Beschreibung:" }
                <input type="text" value={(*description).clone()} oninput={description_change}/>
            </label>
            <br/>
            <label>{ "Kategorie:" }
                <select value={(*category).clone()} onchange={category_change}>
                    <option value="Whiteboard Beamer">{ "Whiteboard Beamer" }</option>
                    <option value="Internet">{ "Internet" }</option>
                    <option value="iPad Koffer">{ "iPad Koffer" }</option>
                    <option value="Apple TV">{ "Apple TV" }</option>
                    <option value="Docu Cam">{ "Dokumenten Kamera" }</option>
                    <option value="Sonstiges">{ "Sonstiges" }</option>
                </select>
            </label>
            <br/>
            <label>{ "Raum:" }
                <input type="text" value={(*room_input).clone()} oninput={room_change}/>
            </label>
            {
                if !room_valid {
                    html! {
                        <p class="warning" >{ "Ungültiger / nicht erlaubter Raum (z. B. 101, K12, D5)" }</p>
                    }
                } else {
                    html! {}
                }
            }
            <br/>
            <button type="submit">{ "Send" }</button>

            <Link<crate::Route> to={crate::Route::AllTickets}>{ "Tickets ansehen" }</Link<crate::Route>>

            {
                if let Some(s) = &*status {
                    html!{ <p>{ s }</p> }
                } else {
                    html!{}
                }
            }

        </form>
    }
}

/// A component for displaying, updating, and deleting a single ticket by its ID.
///
/// This component fetches a specific ticket's details from the backend based on the
/// `id` provided in its `TicketProps`. It allows administrators to update the ticket's
/// status and delete the ticket.
///
/// # Props
/// - `id`: The `i32` ID of the ticket to fetch and display.
///
/// # State
/// Uses `use_state` hooks to manage:
/// - `ticket`: The fetched [`Ticket`] data, if available.
/// - `error`: Any error message encountered during API calls.
/// - `loading`: A boolean indicating if data is currently being fetched.
/// - `status`: The selected status for updating the ticket.
/// - `deleting`: A boolean indicating if a delete operation is in progress.
/// - `delete_error`: Any error message from a delete operation.
///
/// # Functionality
/// - **Data Fetching**: On component mount or `id` change, fetches ticket data from
///   `/api/tickets/:id`.
/// - **Status Update**: Provides a dropdown to change the ticket's status. Submitting the
///   form sends a PATCH request to `/api/tickets/:id` with a `TicketUpdateScheme` payload.
/// - **Ticket Deletion**: Includes a "Delete" button that, after user confirmation,
///   sends a DELETE request to `/api/tickets/:id`. On success, clears the ticket from display.
/// - **Error Handling**: Displays error messages for network issues, API errors, or parsing failures.
/// - **Date Formatting**: Displays the ticket creation date formatted to `Europe/Berlin` timezone.
///
/// # Example
/// ```rust
/// html! {
///     <TicketByID id={123} />
/// }
/// ```
#[component(TicketByID)]
pub fn ticket_by_id_component(props: &TicketProps) -> Html {
    let ticket = use_state(|| None::<Ticket>);
    let error = use_state(|| None::<String>);
    let loading = use_state(|| false);
    let id = props.id;
    let status = use_state(|| "".to_string());

    {
        let ticket = ticket.clone();
        let error = error.clone();
        let loading = loading.clone();

        use_effect_with(id, move |id_ref| {
            loading.set(true);
            let ticket = ticket.clone();
            let error = error.clone();
            let id = *id_ref;
            spawn_local(async move {
                let url = format!("/api/tickets/{}", id);
                match Request::get(&url).send().await {
                    Ok(response) => {
                        let status = response.status();
                        if status == 200 {
                            match response.json::<Ticket>().await {
                                Ok(t) => ticket.set(Some(t)),
                                Err(err) => error.set(Some(format!("Parse error: {}", err))),
                            }
                        } else {
                            match response.json::<ApiError>().await {
                                Ok(ae) => error.set(Some(ae.message)),
                                Err(_) => {
                                    if let Ok(text) = response.text().await {
                                        error.set(Some(text));
                                    } else {
                                        error.set(Some(format!("Server error: {}", status)));
                                    }
                                }
                            }
                        }
                    }
                    Err(err) => error.set(Some(format!("Network error: {}", err))),
                }
                loading.set(false);
            });
            || ()
        });
    }
    let onsubmit = {
        let status = status.clone();
        let id = id.clone();
        let error = error.clone();

        Callback::from(move |e: SubmitEvent| {
            e.prevent_default();
            let form: web_sys::HtmlFormElement = e.target_unchecked_into();
            let select_element = form
                .query_selector("select[name=\"status\"]")
                .ok()
                .and_then(|opt| opt)
                .and_then(|el| el.dyn_into::<HtmlSelectElement>().ok());
            let new_status = select_element
                .map(|s| s.value())
                .unwrap_or_else(|| (*status).clone());
            status.set(new_status.clone());

            let id = id.clone();
            let error = error.clone();

            spawn_local(async move {
                let value = TicketUpdateScheme { status: new_status };

                let url = format!("/api/tickets/{}", id);
                let request = Request::patch(&url)
                    .json(&value)
                    .expect("Failed to construct request");

                match request.send().await {
                    Ok(response) if response.status() == 200 => error.set(Some("Success".into())),
                    Ok(response) => error.set(Some(format!("Error: {}", response.status()))),
                    Err(err) => error.set(Some(format!("Network error: {}", err))),
                }
            });
        })
    };

    let deleting = use_state(|| false);
    let delete_error = use_state(|| None::<String>);

    let ondelete = {
        let deleting = deleting.clone();
        let delete_error = delete_error.clone();
        let ticket_state = ticket.clone();
        let id = id;

        Callback::from(move |e: MouseEvent| {
            e.prevent_default();
            if !web_sys::window()
                .and_then(|w| w.confirm_with_message("Sicher löschen?").ok())
                .unwrap_or(false)
            {
                return;
            }

            deleting.set(true);
            delete_error.set(None);

            let deleting = deleting.clone();
            let delete_error = delete_error.clone();
            let ticket_state = ticket_state.clone();

            spawn_local(async move {
                let url = format!("/api/tickets/{}", id);
                let request =
                    Request::delete(&url).credentials(web_sys::RequestCredentials::Include);

                match request.send().await {
                    Ok(resp) if resp.status() == 200 || resp.status() == 204 => {
                        // remove local state or navigate away
                        ticket_state.set(None); // clears the shown item
                    }
                    Ok(resp) => {
                        let txt = resp.text().await.unwrap_or_else(|_| "Unknown".into());
                        delete_error.set(Some(format!("HTTP {}: {}", resp.status(), txt)));
                    }
                    Err(err) => delete_error.set(Some(format!("Network error: {}", err))),
                }
                deleting.set(false);
            });
        })
    };

    if *loading {
        html! {<p>{ "Loading" }</p>}
    } else if let Some(e) = &*error {
        html! { <p>{ format!("Error: {}", e) }</p> }
    } else if let Some(t) = &*ticket {
        html! {
            <div class="rundbg">
                <h1>{ format!("Ticket #{}", t.id) }</h1>
                <p><strong>{ "Kategorie: " }</strong>{ &t.category }</p>
                <p><strong>{ "Betreff: " }</strong>{ &t.betreff }</p>
                <p><strong>{ "Beschreibung: " }</strong>{ &t.description }</p>
                <p><strong>{ "Raum: " }</strong>{ t.room }</p>
                <p><strong>{ "Datum: " }</strong>{
                    t.date.with_timezone(&Berlin).format("%d.%m.%Y %H:%M:%S").to_string()
                }</p>
                <p><strong>{ "Status: "}</strong>{ match t.status.as_str() {
                    "ToDo" => "Zu tun",
                    "InProgress" => "In Bearbeitung",
                    "Completed" => "Erledigt",
                    "Archived" => "Archiviert",
                    _ => "Ungültiger Status"
                }}</p>
                <p><strong>{ "Name: "}</strong>{ format!{"{} {}", t.user_first_name, t.user_last_name } }</p>

                <form {onsubmit}>
                    <label>{ "Status ändern" }
                        <select name="status">
                            <option value="ToDo">{ "Zu tun" }</option>
                            <option value="InProgress">{ "In Bearbeitung" }</option>
                            <option value="Completed">{ "Erledigt" }</option>
                            <option value="Archived">{ "Archiviert" }</option>
                        </select>
                    </label>
                    <button type="submit">{ "Aktualisieren" }</button>
                </form>

                <button onclick={ondelete} disabled={*deleting}>
                    {if *deleting {"Löschen..."} else {"Löschen"}}
                </button>

                <Link<crate::Route> to={crate::Route::AllTickets}>{ "Zurück zur Ticketübersicht" }</Link<crate::Route>>
                if let Some(err) = &*delete_error {
                    <p style="color:red">{ err.clone() }</p>
                }
            </div>
        }
    } else {
        html! { <p>{ "No ticket found." }</p> }
    }
}

/// A component for fetching and displaying a list of all tickets.
///
/// This component retrieves all tickets from the backend and presents them as a list.
/// It dynamically filters the displayed tickets based on the current user's role:
/// administrators see all tickets, while regular users only see tickets they created.
///
/// # State
/// Uses `use_state` hooks to manage:
/// - `tickets`: A vector of `Ticket` structs to store the fetched tickets.
/// - `error`: Any error message encountered during API calls.
/// - `loading`: A boolean indicating if data is currently being fetched.
/// - `user`: An `ActiveUser` struct holding the current user's ID and admin status.
///
/// # Functionality
/// - **Fetch Tickets**: On component mount, fetches all tickets from `/api/tickets`.
/// - **Fetch Current User**: Concurrently fetches the current user's details from
///   `/api/users/current` to determine their `user_id` and `is_admin` status.
/// - **Conditional Display**:
///   - If `loading` is true, displays "Loading...".
///   - If an `error` occurs, displays the error message.
///   - Otherwise, renders a list of tickets.
/// - **Filtering**:
///   - Administrators (`user.is_admin = true`) see all tickets.
///   - Regular users (`user.is_admin = false`) only see tickets where `t.user_id == user.id`.
/// - **Navigation**: Each ticket in the list is a link to [`crate::Route::TicketById`]
///   for viewing individual ticket details.
///
/// # Example
/// ```rust
/// html! {
///     <AllTickets />
/// }
/// ```
#[component(AllTickets)]
pub fn all_tickets_component() -> Html {
    let tickets = use_state(|| Vec::<Ticket>::new());
    let error = use_state(|| None::<String>);
    let loading = use_state(|| false);
    let user = use_state(|| ActiveUser {
        id: None,
        is_admin: false,
    });

    {
        let tickets = tickets.clone();
        let error = error.clone();
        let loading = loading.clone();

        use_effect_with((), move |_| {
            loading.set(true);
            spawn_local(async move {
                let url = format!("/api/tickets");
                match Request::get(&url).send().await {
                    Ok(response) if response.status() == 200 => {
                        match response.json::<Vec<Ticket>>().await {
                            Ok(t) => tickets.set(t),
                            Err(e) => error.set(Some(format!("parse error: {}", e))),
                        }
                    }
                    Ok(response) => {
                        if let Ok(text) = response.text().await {
                            error.set(Some(text));
                        } else {
                            error.set(Some(format!("status {}", response.status())));
                        }
                    }
                    Err(err) => error.set(Some(format!("Network error: {}", err))),
                }
                loading.set(false);
            });
            || ()
        });
    }

    {
        let user = user.clone();
        use_effect_with((), move |_| {
            let user = user.clone();
            spawn_local(async move {
                if let Ok(response) = Request::get("/api/users/current")
                    .credentials(web_sys::RequestCredentials::Include)
                    .send()
                    .await
                {
                    if response.status() == 200 {
                        if let Ok(json) = response.json::<serde_json::Value>().await {
                            let id = json
                                .get("data")
                                .and_then(|d| d.get("id"))
                                .and_then(|v| v.as_i64())
                                .and_then(|n| i16::try_from(n).ok());
                            let is_admin = json
                                .get("data")
                                .and_then(|d| d.get("is_admin"))
                                .and_then(|v| v.as_bool())
                                .unwrap_or(false);
                            user.set(ActiveUser { id, is_admin });
                        }
                    }
                }
            });
            || ()
        });
    }

    if *loading {
        html! {<p>{ "Loading" }</p>}
    } else if let Some(e) = &*error {
        html! { <p>{ format!("Error: {}", e) }</p> }
    } else {
        html! {
            <ul class= "postits">
            { for tickets.iter().filter(|t| t.status != "Archived" && (if user.is_admin { true } else if let Some(uid) = user.id { t.user_id == uid } else { false })).map(|t| {
                let status_class = match t.status.as_str() {
                    "ToDo" => "To-Do",
                    "InProgress" => "InProgress",
                    "Completed" => "Completed",
                    "Archived" => "Archived",
                    _ => "To-Do"
                };
                html! {
                    <div class={classes!{status_class, "listbox"}}>
                        <li key={t.id.to_string()}>
                            <Link<crate::Route> to={crate::Route::TicketById{id: t.id}}><h3>{ format!("{}", t.betreff,) }</h3></Link<crate::Route>>
                        </li>

                    </div>
                }})}
            </ul>
        }
    }
}

/// A component for fetching and displaying a list of archived tickets.
///
/// This component retrieves all tickets from the backend and presents them as a list,
/// filtered to only show those with "Archived" status.
///
/// # State
/// Uses `use_state` hooks to manage:
/// - `tickets`: A vector of `Ticket` structs to store the fetched tickets.
/// - `error`: Any error message encountered during API calls.
/// - `loading`: A boolean indicating if data is currently being fetched.
/// - `user`: An `ActiveUser` struct holding the current user's ID and admin status.
///
/// # Functionality
/// - **Fetch Tickets**: On component mount, fetches all tickets from `/api/tickets`.
/// - **Fetch Current User**: Concurrently fetches the current user's details from
///   `/api/users/current` to determine their `user_id` and `is_admin` status.
/// - **Conditional Display**:
///   - If `loading` is true, displays "Loading...".
///   - If an `error` occurs, displays the error message.
///   - Otherwise, renders a list of tickets.
/// - **Filtering**:
///   - Only tickets with `t.status == "Archived"` are displayed.
///   - If the user is an admin, all archived tickets are shown.
///   - If the user is not an admin, only their own archived tickets are shown.
/// - **Navigation**: Each ticket in the list is a link to [`crate::Route::TicketById`]
///   for viewing individual ticket details.
///
/// # Example
/// ```rust
/// html! {
///     <ArchivedTickets />
/// }
/// ```
#[component(ArchivedTickets)]
pub fn archived_tickets_component() -> Html {
    let tickets = use_state(|| Vec::<Ticket>::new());
    let error = use_state(|| None::<String>);
    let loading = use_state(|| false);
    let user = use_state(|| ActiveUser {
        id: None,
        is_admin: false,
    });

    {
        let tickets = tickets.clone();
        let error = error.clone();
        let loading = loading.clone();

        use_effect_with((), move |_| {
            loading.set(true);
            spawn_local(async move {
                let url = format!("/api/tickets");
                match Request::get(&url).send().await {
                    Ok(response) if response.status() == 200 => {
                        match response.json::<Vec<Ticket>>().await {
                            Ok(t) => tickets.set(t),
                            Err(e) => error.set(Some(format!("parse error: {}", e))),
                        }
                    }
                    Ok(response) => {
                        if let Ok(text) = response.text().await {
                            error.set(Some(text));
                        } else {
                            error.set(Some(format!("status {}", response.status())));
                        }
                    }
                    Err(err) => error.set(Some(format!("Network error: {}", err))),
                }
                loading.set(false);
            });
            || ()
        });
    }

    {
        let user = user.clone();
        use_effect_with((), move |_| {
            let user = user.clone();
            spawn_local(async move {
                if let Ok(response) = Request::get("/api/users/current")
                    .credentials(web_sys::RequestCredentials::Include)
                    .send()
                    .await
                {
                    if response.status() == 200 {
                        if let Ok(json) = response.json::<serde_json::Value>().await {
                            let id = json
                                .get("data")
                                .and_then(|d| d.get("id"))
                                .and_then(|v| v.as_i64())
                                .and_then(|n| i16::try_from(n).ok());
                            let is_admin = json
                                .get("data")
                                .and_then(|d| d.get("is_admin"))
                                .and_then(|v| v.as_bool())
                                .unwrap_or(false);
                            user.set(ActiveUser { id, is_admin });
                        }
                    }
                }
            });
            || ()
        });
    }

    if *loading {
        html! {<p>{ "Loading" }</p>}
    } else if let Some(e) = &*error {
        html! { <p>{ format!("Error: {}", e) }</p> }
    } else {
        html! {
            <ul class="postits">
            { for tickets.iter().filter(|t| t.status == "Archived" && (user.is_admin || if let Some(uid) = user.id { t.user_id == uid } else { false })).map(|t| html! {
                    <div class="listbox">
                        <li key={t.id.to_string()}>
                            <Link<crate::Route> to={crate::Route::TicketById{id: t.id}}><h3>{ format!("{} - #{}", t.betreff, t.id) }</h3></Link<crate::Route>>
                            <p>{ &t.description }</p>
                            <p>{ match t.status.as_str() {
                                "ToDo" => "Zu tun",
                                "InProgress" => "In Bearbeitung",
                                "Completed" => "Erledigt",
                                "Archived" => "Archiviert",
                                _ => "Ungültiger Status"
                            }}</p>
                        </li>

                    </div>
                })}
            </ul>
        }
    }
}