use dioxus::prelude::*;
use dioxus_free_icons::icons::bs_icons::{
    BsBoxArrowRight, BsBuilding, BsChatDots, BsCloudArrowUp, BsCodeSlash, BsCollection, BsGithub,
    BsGrid, BsHouseDoor, BsPuzzle,
};
use dioxus_free_icons::Icon;

use crate::Route;

/// Navigation entry for the sidebar.
struct NavItem {
    label: &'static str,
    route: Route,
    /// Bootstrap icon element rendered beside the label.
    icon: Element,
}

/// Fixed left sidebar containing header, navigation, logout, and footer.
///
/// # Arguments
///
/// * `email` - Email address displayed beneath the avatar placeholder.
/// * `avatar_url` - URL for the avatar image (unused placeholder for now).
#[component]
pub fn Sidebar(email: String, avatar_url: String) -> Element {
    let nav_items: Vec<NavItem> = vec![
        NavItem {
            label: "Dashboard",
            route: Route::DashboardPage {},
            icon: rsx! { Icon { icon: BsHouseDoor, width: 18, height: 18 } },
        },
        NavItem {
            label: "Providers",
            route: Route::ProvidersPage {},
            icon: rsx! { Icon { icon: BsCloudArrowUp, width: 18, height: 18 } },
        },
        NavItem {
            label: "Chat",
            route: Route::ChatPage {},
            icon: rsx! { Icon { icon: BsChatDots, width: 18, height: 18 } },
        },
        NavItem {
            label: "Tools",
            route: Route::ToolsPage {},
            icon: rsx! { Icon { icon: BsPuzzle, width: 18, height: 18 } },
        },
        NavItem {
            label: "Knowledge Base",
            route: Route::KnowledgePage {},
            icon: rsx! { Icon { icon: BsCollection, width: 18, height: 18 } },
        },
        NavItem {
            label: "Developer",
            route: Route::AgentsPage {},
            icon: rsx! { Icon { icon: BsCodeSlash, width: 18, height: 18 } },
        },
        NavItem {
            label: "Organization",
            route: Route::OrgPricingPage {},
            icon: rsx! { Icon { icon: BsBuilding, width: 18, height: 18 } },
        },
    ];

    // Determine current path to highlight the active nav link.
    let current_route = use_route::<Route>();

    rsx! {
        aside { class: "sidebar",
            SidebarHeader { email: email.clone(), avatar_url }

            nav { class: "sidebar-nav",
                for item in nav_items {
                    {
                        // Active detection for nested routes: highlight the parent nav
                        // item when any child route within the nested shell is active.
                        let is_active = match &current_route {
                            Route::AgentsPage {} | Route::FlowPage {} | Route::AnalyticsPage {} => {
                                item.label == "Developer"
                            }
                            Route::OrgPricingPage {} | Route::OrgDashboardPage {} => {
                                item.label == "Organization"
                            }
                            _ => item.route == current_route,
                        };
                        let cls = if is_active { "sidebar-link active" } else { "sidebar-link" };
                        rsx! {
                            Link { to: item.route, class: cls,
                                {item.icon}
                                span { "{item.label}" }
                            }
                        }
                    }
                }
            }

            div { class: "sidebar-logout",
                Link {
                    to: NavigationTarget::<Route>::External("/auth/logout".into()),
                    class: "sidebar-link logout-btn",
                    Icon { icon: BsBoxArrowRight, width: 18, height: 18 }
                    span { "Logout" }
                }
            }

            SidebarFooter {}
        }
    }
}

/// Avatar circle and email display at the top of the sidebar.
///
/// # Arguments
///
/// * `email` - User email to display.
/// * `avatar_url` - Placeholder for future avatar image URL.
#[component]
fn SidebarHeader(email: String, avatar_url: String) -> Element {
    // Extract initials from email (first two chars before @).
    let initials: String = email
        .split('@')
        .next()
        .unwrap_or("U")
        .chars()
        .take(2)
        .collect::<String>()
        .to_uppercase();

    rsx! {
        div { class: "sidebar-header",
            div { class: "avatar-circle",
                span { class: "avatar-initials", "{initials}" }
            }
            p { class: "sidebar-email", "{email}" }
        }
    }
}

/// Footer section with version string and placeholder social links.
#[component]
fn SidebarFooter() -> Element {
    let version = env!("CARGO_PKG_VERSION");

    rsx! {
        footer { class: "sidebar-footer",
            div { class: "sidebar-social",
                a { href: "#", class: "social-link", title: "GitHub",
                    Icon { icon: BsGithub, width: 16, height: 16 }
                }
                a { href: "#", class: "social-link", title: "Impressum",
                    Icon { icon: BsGrid, width: 16, height: 16 }
                }
            }
            p { class: "sidebar-version", "v{version}" }
        }
    }
}