use base64::{engine::general_purpose, Engine as _};
use dioxus::prelude::*;
use tracing::{debug, trace, warn};

use super::{button::Button, icons::SearchIcon, text_input::TextInput};
use crate::{
    domain::model::{common::PresenceState as DomainPresenceState, room::RoomId, space::SpaceId},
    ui::{
        components::icons::{ChatsIcon, LogoIcon, RoomsIcon, SpacesIcon},
        ACCOUNT, STORE,
    },
};

turf::style_sheet!("src/ui/components/conversations.scss");

#[component]
fn AccountAvatar(content: Option<Vec<u8>>, class_name: Option<String>) -> Element {
    match content {
        Some(content) => {
            let encoded = general_purpose::STANDARD.encode(content);
            rsx! {
                div {
                    class: class_name,
                    background_image: format!("url(data:image/jpeg;base64,{encoded})")
                }
            }
        }
        // TODO: Manage acount without avatar
        None => None,
    }
}

#[component]
fn PresenceState(state: Option<DomainPresenceState>, class_name: Option<String>) -> Element {
    let class_name = class_name.unwrap_or("".to_string());

    match state {
        Some(state) => {
            let state_class = match state {
                DomainPresenceState::Online => ClassName::ONLINE,
                DomainPresenceState::Offline => ClassName::OFFLINE,
                DomainPresenceState::Unavailable => ClassName::UNAVAILABLE,
                _ => ClassName::UNAVAILABLE,
            };

            let classes = [class_name.as_str(), state_class].join(" ");

            rsx! {
                div {
                    class: classes,
                    LogoIcon {},
                }
            }
        }
        None => None,
    }
}

#[component]
fn DisplayName(display_name: Option<String>, class_name: Option<String>) -> Element {
    match display_name {
        Some(display_name) => {
            rsx! {
                div {
                    class: class_name,
                    p {
                        {display_name},
                    }
                }
            }
        }
        None => None,
    }
}

#[component]
fn Status(status: Option<String>, class_name: Option<String>) -> Element {
    let status = status.unwrap_or("Type your status".to_string());

    rsx! {
        div {
            class: class_name,
            TextInput {
                placeholder: status,
            }
        }
    }
}

pub fn Account() -> Element {
    let avatar = use_resource(move || async move {
        let account = ACCOUNT.read();
        let avatar = account.get_avatar().await;
        rsx! {
            AccountAvatar {
                class_name: ClassName::ACCOUNT_AVATAR,
                content: avatar.borrow().clone(),
            }
        }
    });

    let presence_state = use_resource(move || async move {
        // TODO: Fetch the state from the domain
        rsx! {
            PresenceState {
                state: DomainPresenceState::Online,
                class_name: ClassName::ACCOUNT_PRESENCE_STATE,
            }
        }
    });

    let display_name = use_resource(move || async move {
        let account = ACCOUNT.read();
        let display_name = account.get_display_name().await;
        rsx! {
            DisplayName {
                class_name: ClassName::ACCOUNT_DISPLAY_NAME,
                display_name: display_name.borrow().clone(),
            }
        }
    });

    let status = use_resource(move || async move {
        // TODO: Fetch the status from the domain
        rsx! {
            Status {
                class_name: ClassName::ACCOUNT_STATUS,
                status: "Coucou, Je suis BG92".to_string(),
            }
        }
    });

    rsx! {
        style { {STYLE_SHEET} },

        div {
            class: ClassName::ACCOUNT,

            {avatar},
            {presence_state},
            {display_name},

            {status},

            div {
                class: ClassName::ACCOUNT_SPACES,
                Button {
                    SpacesIcon {},
                }
            },

            div {
                class: ClassName::ACCOUNT_CHAT,
                Button {
                    ChatsIcon {},
                }
            },

            div {
                class: ClassName::ACCOUNT_ROOM,
                Button {
                    RoomsIcon {},
                }
            },
        }
    }
}

#[component]
pub fn ConversationAvatar(room_id: RoomId, on_clicked: EventHandler<RoomId>) -> Element {
    let rooms = STORE.read().rooms();
    let toto = rooms.get(&room_id).unwrap();

    let room = toto.signal();

    let room_id = room.id();
    let room_name = room.name();

    let selected_room_id = use_context::<Signal<Option<RoomId>>>();

    let invited_badge = if room.is_invited() {
        rsx! {
            div {
                class: ClassName::CONVERSATION_AVATAR_INVITED_BADGE,

                p {
                    "Invited",
                }
            }
        }
    } else {
        None
    };

    let is_selected = match selected_room_id.read().as_ref() {
        Some(selected_room_id) => *selected_room_id == room_id,
        None => false,
    };

    // let avatar = if let Some(Some(content)) = &*avatar.read() {
    let avatar = if let Some(content) = room.avatar() {
        let encoded = general_purpose::STANDARD.encode(content);
        rsx! {
            div {
                class: ClassName::CONVERSATION_AVATAR_IMAGE,
                background_image: format!("url(data:image/jpeg;base64,{encoded})"),
            }
        }
    } else {
        let placeholder = room_name
            .unwrap_or("?".to_string())
            .to_uppercase()
            .chars()
            .next()
            .unwrap_or('?')
            .to_string();

        debug!("Use of {} placeholder for {}", placeholder, room_id);

        rsx! {
            div {
                class: ClassName::CONVERSATION_AVATAR_IMAGE,

                {placeholder},
            }
        }
    };

    let classes = [
        ClassName::CONVERSATION_AVATAR,
        if is_selected { ClassName::SELECTED } else { "" },
    ];
    let classes_str = classes.join(" ");

    rsx! {
        div {
            class: "{classes_str}",

            onclick: move |evt| {
                on_clicked.call(room_id.clone());
                evt.stop_propagation();
            },

            {avatar}
            {invited_badge}
        }
    }
}

#[component]
pub fn ConversationsCarousel(on_selected_conversation: EventHandler<RoomId>) -> Element {
    let mut ordered_rooms = use_signal(Vec::<RoomId>::new);

    use_effect(move || {
        let rooms = use_context::<Signal<Vec<RoomId>>>();
        let rooms = rooms.read();
        for room in rooms.iter() {
            if !ordered_rooms.peek().contains(room) {
                ordered_rooms.push(room.clone());
            }
        }
        ordered_rooms.retain(|room| rooms.contains(room));
    });

    let ordered_rooms = ordered_rooms.read();
    let rendered_avatars = ordered_rooms.iter().map(|room| {
        rsx! {
            ConversationAvatar {
                room_id: room.clone(),
                on_clicked: on_selected_conversation,
            }
        }
    });

    rsx! {
        div {
            class: ClassName::SPACE_CONVERSATIONS_CAROUSEL,
            // TODO: Needed?
            onscroll: move |_| {
                // Catch scrolling events.
            },
            {rendered_avatars},
        }
    }
}

#[component]
pub fn Space(id: SpaceId) -> Element {
    let space = STORE.read().spaces().get(&id).unwrap().signal();

    let name = space.name();

    let mut selected_room_id = use_context_provider(|| Signal::new(None::<RoomId>));
    let mut displayed_rooms = use_context_provider(|| Signal::new(Vec::<RoomId>::new()));

    use_effect(move || {
        // let rooms = STORE.read().rooms();
        let rooms = STORE.peek().rooms();
        let room_ids = space.room_ids();
        for room_id in room_ids {
            if rooms.contains_key(&room_id) {
                displayed_rooms.write().push(room_id);
            }
        }
    });

    let on_selected_conversation = move |room_id: RoomId| {
        trace!("");
        selected_room_id.set(Some(room_id));
    };

    let mut space_classes: [&str; 2] = [ClassName::SPACE, ""];

    let mut selected_room_name = "".to_string();

    if let Some(room_id) = selected_room_id.read().as_ref() {
        space_classes[1] = ClassName::DISPLAY_CONVERSATION_NAME;

        if let Some(room) = STORE.read().rooms().get(room_id) {
            let room = room.signal();

            if let Some(name) = room.name() {
                selected_room_name = name;
            } else {
                debug!("No name set for {} room", &room_id);
                selected_room_name = room_id.to_string();
            }
        } else {
            warn!("No room found for the {} id", &room_id);
        }
    }

    let classes_str = space_classes.join(" ");

    rsx! {
        style { {STYLE_SHEET} },

        div {
            class: "{classes_str}",

            // Deselect the conversation on clicks outside of the ConversationAvatar
            onclick: move |_| {
                selected_room_id.set(None);
            },

            div {
                class: ClassName::SPACE_NAME,
                p {
                    {name}
                }
            },
            ConversationsCarousel {
                on_selected_conversation,
            },
            div {
                class: ClassName::SPACE_CONVERSATION_NAME,
                p {
                    {selected_room_name},
                }
            }
        }
    }
}

#[component]
pub fn HomeSpace() -> Element {
    let name = "Home";

    let mut selected_room_id = use_context_provider(|| Signal::new(None::<RoomId>));
    let mut displayed_rooms = use_context_provider(|| Signal::new(Vec::<RoomId>::new()));

    use_effect(move || {
        let rooms = STORE.read().rooms();
        for room in rooms.values() {
            if room.signal().spaces().is_empty() {
                let room_id = room.signal().id();
                displayed_rooms.write().push(room_id);
            }
        }
    });

    let on_selected_conversation = move |room_id: RoomId| {
        selected_room_id.set(Some(room_id));
    };

    let mut space_classes: [&str; 2] = [ClassName::SPACE, ""];

    let mut selected_room_name = "".to_string();

    if let Some(room_id) = selected_room_id.read().as_ref() {
        space_classes[1] = ClassName::DISPLAY_CONVERSATION_NAME;

        if let Some(room) = STORE.read().rooms().get(room_id) {
            let room = room.signal();

            if let Some(name) = room.name() {
                selected_room_name = name;
            } else {
                debug!("No name set for {} room", &room_id);
                selected_room_name = room_id.to_string();
            }
        } else {
            warn!("No room found for the {} id", &room_id);
        }
    }

    let classes_str = space_classes.join(" ");

    rsx! {
        style { {STYLE_SHEET} },

        div {
            class: "{classes_str}",

            // Deselect the conversation on clicks outside of the ConversationAvatar
            onclick: move |_| {
                selected_room_id.set(None);
            },

            div {
                class: ClassName::SPACE_NAME,
                p {
                    {name}
                }
            },
            ConversationsCarousel {
                on_selected_conversation,
            },
            div {
                class: ClassName::SPACE_CONVERSATION_NAME,
                p {
                    {selected_room_name},
                }
            }
        }
    }
}

pub fn Spaces() -> Element {
    let spaces = STORE.read().spaces();
    let space_ids = spaces.keys().clone().last();

    let rendered_spaces = space_ids.map(|id| {
        rsx! {
            Space { id: id.clone() }
        }
    });

    rsx! {
        style { {STYLE_SHEET} },

        div {
            class: ClassName::SPACES,

            {rendered_spaces},

            HomeSpace {},
        }
    }
}

pub fn Search() -> Element {
    rsx! {
        style { {STYLE_SHEET} },

        div {
            class: ClassName::SEARCH,

            TextInput {}

            div {
                class: ClassName::SEARCH_BUTTON,
                Button {
                    SearchIcon {}
                }
            }
        }
    }
}

pub fn Conversations() -> Element {
    rsx! {
        style { {STYLE_SHEET} },

        div {
            class: ClassName::CONVERSATIONS,

            div {
                class: ClassName::CONVERSATIONS_ACCOUNT,
                Account {},
            },

            div {
                class: ClassName::CONVERSATIONS_SPACES,
                Spaces {},
            },

            div {
                class: ClassName::CONVERSATIONS_SEARCH,
                Search {},
            },
        }
    }
}