use crate::i18n::{t, Locale};
use dioxus::prelude::*;

/// Chat input bar with a textarea and send button.
///
/// Enter sends the message; Shift+Enter inserts a newline.
/// The input is disabled during streaming.
///
/// # Arguments
///
/// * `input_text` - Two-way bound input text signal
/// * `on_send` - Callback fired with the message text when sent
/// * `is_streaming` - Whether to disable the input (streaming in progress)
#[component]
pub fn ChatInputBar(
    input_text: Signal<String>,
    on_send: EventHandler<String>,
    is_streaming: bool,
) -> Element {
    let locale = use_context::<Signal<Locale>>();
    let l = *locale.read();

    let mut input = input_text;

    rsx! {
        div { class: "chat-input-bar",
            textarea {
                class: "chat-input",
                placeholder: "{t(l, \"chat.type_message\")}",
                disabled: is_streaming,
                rows: "1",
                value: "{input}",
                oninput: move |e: Event<FormData>| {
                    input.set(e.value());
                },
                onkeypress: move |e: Event<KeyboardData>| {
                    // Enter sends, Shift+Enter adds newline
                    if e.key() == Key::Enter && !e.modifiers().shift() {
                        e.prevent_default();
                        let text = input.read().trim().to_string();
                        if !text.is_empty() {
                            on_send.call(text);
                            input.set(String::new());
                        }
                    }
                },
            }
            button {
                class: "btn-primary chat-send-btn",
                disabled: is_streaming || input.read().trim().is_empty(),
                onclick: move |_| {
                    let text = input.read().trim().to_string();
                    if !text.is_empty() {
                        on_send.call(text);
                        input.set(String::new());
                    }
                },
                if is_streaming {
                    // Stop icon during streaming
                    dioxus_free_icons::Icon {
                        icon: dioxus_free_icons::icons::fa_solid_icons::FaStop,
                        width: 16, height: 16,
                    }
                } else {
                    dioxus_free_icons::Icon {
                        icon: dioxus_free_icons::icons::fa_solid_icons::FaPaperPlane,
                        width: 16, height: 16,
                    }
                }
            }
        }
    }
}