use maud::{html, Markup, PreEscaped};
use peach_network::network;
use rouille::{post_input, try_or_400, Request, Response};

use crate::{
    templates,
    utils::{
        flash::{FlashRequest, FlashResponse},
        theme,
    },
    WLAN_IFACE,
};

// ROUTE: /settings/network/wifi/modify?<ssid>

fn render_ssid_input(selected_ap: Option<String>) -> Markup {
    html! {
        (PreEscaped("<!-- input for network ssid -->"))
        input id="ssid" name="ssid" class="center input" type="text" placeholder="SSID" title="Network name (SSID) for WiFi access point" value=[selected_ap] autofocus;
    }
}

fn render_password_input() -> Markup {
    html! {
        (PreEscaped("<!-- input for network password -->"))
        input id="pass" name="pass" class="center input" type="password" placeholder="Password" title="Password for WiFi access point";
    }
}

fn render_buttons() -> Markup {
    html! {
        (PreEscaped("<!-- BUTTONS -->"))
        div id="buttons" {
            input id="savePassword" class="button button-primary center" title="Save" type="submit" value="Save";
            a class="button button-secondary center" href="/settings/network" title="Cancel" { "Cancel" }
        }
    }
}

/// WiFi access point password modification form template builder.
pub fn build_template(request: &Request, selected_ap: Option<String>) -> PreEscaped<String> {
    let (flash_name, flash_msg) = request.retrieve_flash();

    let form_template = html! {
        (PreEscaped("<!-- NETWORK MODIFY AP PASSWORD FORM -->"))
        div class="card center" {
            form id="wifiModify" action="/settings/network/wifi/modify" method="post" {
                (render_ssid_input(selected_ap))
                (render_password_input())
                (render_buttons())
            }
            // render flash message if cookies were found in the request
            @if let (Some(name), Some(msg)) = (flash_name, flash_msg) {
                (PreEscaped("<!-- FLASH MESSAGE -->"))
                (templates::flash::build_template(name, msg))
            }
        }
    };

    let body = templates::nav::build_template(
        form_template,
        "Change WiFi Password",
        Some("/settings/network"),
    );

    let theme = theme::get_theme();

    templates::base::build_template(body, theme)
}

/// Parse the SSID and password for an access point and save the new password.
pub fn handle_form(request: &Request) -> Response {
    let data = try_or_400!(post_input!(request, {
        ssid: String,
        pass: String,
    }));

    let (name, msg) = match network::id(WLAN_IFACE, &data.ssid) {
        Ok(Some(id)) => match network::modify(&id, &data.ssid, &data.pass) {
            Ok(_) => ("success".to_string(), "WiFi password updated".to_string()),
            Err(err) => (
                "error".to_string(),
                format!("Failed to update WiFi password: {}", err),
            ),
        },
        Ok(None) => (
            "error".to_string(),
            format!(
                "Failed to update WiFi password: no saved credentials found for network {}",
                &data.ssid
            ),
        ),
        Err(err) => (
            "error".to_string(),
            format!(
                "Failed to update WiFi password: no ID found for network {}: {}",
                &data.ssid, err
            ),
        ),
    };

    let (flash_name, flash_msg) = (format!("flash_name={}", name), format!("flash_msg={}", msg));

    Response::redirect_303("/settings/network/wifi/modify").add_flash(flash_name, flash_msg)
}