use crate::app::config::PakeConfig;
use crate::util::get_data_dir;
use std::{path::PathBuf, str::FromStr};
use tauri::{App, Config, Url, WebviewUrl, WebviewWindow, WebviewWindowBuilder};

#[cfg(target_os = "macos")]
use tauri::{Theme, TitleBarStyle};

#[cfg(target_os = "windows")]
fn build_proxy_browser_arg(url: &Url) -> Option<String> {
    let host = url.host_str()?;
    let scheme = url.scheme();
    let port = url.port().or_else(|| match scheme {
        "http" => Some(80),
        "socks5" => Some(1080),
        _ => None,
    })?;

    match scheme {
        "http" | "socks5" => Some(format!("--proxy-server={scheme}://{host}:{port}")),
        _ => None,
    }
}

pub fn set_window(app: &mut App, config: &PakeConfig, tauri_config: &Config) -> WebviewWindow {
    let package_name = tauri_config.clone().product_name.unwrap();
    let _data_dir = get_data_dir(app.handle(), package_name);

    let window_config = config
        .windows
        .first()
        .expect("At least one window configuration is required");

    let user_agent = config.user_agent.get();

    let url = match window_config.url_type.as_str() {
        "web" => WebviewUrl::App(window_config.url.parse().unwrap()),
        "local" => WebviewUrl::App(PathBuf::from(&window_config.url)),
        _ => panic!("url type can only be web or local"),
    };

    let config_script = format!(
        "window.pakeConfig = {}",
        serde_json::to_string(&window_config).unwrap()
    );

    // Platform-specific title: macOS prefers empty, others fallback to product name
    let effective_title = window_config.title.as_deref().unwrap_or_else(|| {
        if cfg!(target_os = "macos") {
            ""
        } else {
            tauri_config.product_name.as_deref().unwrap_or("")
        }
    });

    let mut window_builder = WebviewWindowBuilder::new(app, "pake", url)
        .title(effective_title)
        .visible(false)
        .user_agent(user_agent)
        .resizable(window_config.resizable)
        .fullscreen(window_config.fullscreen)
        .maximized(window_config.maximize)
        .inner_size(window_config.width, window_config.height)
        .always_on_top(window_config.always_on_top)
        .incognito(window_config.incognito);

    if window_config.min_width > 0.0 || window_config.min_height > 0.0 {
        let min_w = if window_config.min_width > 0.0 {
            window_config.min_width
        } else {
            window_config.width
        };
        let min_h = if window_config.min_height > 0.0 {
            window_config.min_height
        } else {
            window_config.height
        };
        window_builder = window_builder.min_inner_size(min_w, min_h);
    }

    if !window_config.enable_drag_drop {
        window_builder = window_builder.disable_drag_drop_handler();
    }

    // Add initialization scripts
    window_builder = window_builder
        .initialization_script(&config_script)
        .initialization_script(include_str!("../inject/component.js"))
        .initialization_script(include_str!("../inject/event.js"))
        .initialization_script(include_str!("../inject/style.js"))
        .initialization_script(include_str!("../inject/custom.js"));

    #[cfg(target_os = "windows")]
    let mut windows_browser_args = String::from("--disable-features=msWebOOUI,msPdfOOUI,msSmartScreenProtection --disable-blink-features=AutomationControlled");

    #[cfg(all(not(target_os = "windows"), not(target_os = "macos")))]
    let mut linux_browser_args = String::from("--disable-blink-features=AutomationControlled");

    if window_config.ignore_certificate_errors {
        #[cfg(target_os = "windows")]
        {
            windows_browser_args.push_str(" --ignore-certificate-errors");
        }

        #[cfg(all(not(target_os = "windows"), not(target_os = "macos")))]
        {
            linux_browser_args.push_str(" --ignore-certificate-errors");
        }

        #[cfg(target_os = "macos")]
        {
            window_builder = window_builder.additional_browser_args("--ignore-certificate-errors");
        }
    }

    if window_config.enable_wasm {
        #[cfg(target_os = "windows")]
        {
            windows_browser_args.push_str(" --enable-features=SharedArrayBuffer");
            windows_browser_args.push_str(" --enable-unsafe-webgpu");
        }

        #[cfg(all(not(target_os = "windows"), not(target_os = "macos")))]
        {
            linux_browser_args.push_str(" --enable-features=SharedArrayBuffer");
            linux_browser_args.push_str(" --enable-unsafe-webgpu");
        }

        #[cfg(target_os = "macos")]
        {
            window_builder = window_builder
                .additional_browser_args("--enable-features=SharedArrayBuffer")
                .additional_browser_args("--enable-unsafe-webgpu");
        }
    }

    let mut parsed_proxy_url: Option<Url> = None;

    // Platform-specific configuration must be set before proxy on Windows/Linux
    #[cfg(target_os = "macos")]
    {
        let title_bar_style = if window_config.hide_title_bar {
            TitleBarStyle::Overlay
        } else {
            TitleBarStyle::Visible
        };
        window_builder = window_builder.title_bar_style(title_bar_style);

        if window_config.dark_mode {
            window_builder = window_builder.theme(Some(Theme::Dark));
        }
    }

    // Windows and Linux: set data_directory before proxy_url
    #[cfg(not(target_os = "macos"))]
    {
        window_builder = window_builder.data_directory(_data_dir).theme(None);

        if !config.proxy_url.is_empty() {
            if let Ok(proxy_url) = Url::from_str(&config.proxy_url) {
                parsed_proxy_url = Some(proxy_url.clone());
                #[cfg(target_os = "windows")]
                {
                    if let Some(arg) = build_proxy_browser_arg(&proxy_url) {
                        windows_browser_args.push(' ');
                        windows_browser_args.push_str(&arg);
                    }
                }
            }
        }

        #[cfg(target_os = "windows")]
        {
            window_builder = window_builder.additional_browser_args(&windows_browser_args);
        }

        #[cfg(all(not(target_os = "windows"), not(target_os = "macos")))]
        {
            window_builder = window_builder.additional_browser_args(&linux_browser_args);
        }
    }

    // Set proxy after platform-specific configs (required for Windows/Linux)
    if parsed_proxy_url.is_none() && !config.proxy_url.is_empty() {
        if let Ok(proxy_url) = Url::from_str(&config.proxy_url) {
            parsed_proxy_url = Some(proxy_url);
        }
    }

    if let Some(proxy_url) = parsed_proxy_url {
        window_builder = window_builder.proxy_url(proxy_url);
        #[cfg(debug_assertions)]
        println!("Proxy configured: {}", config.proxy_url);
    }

    window_builder.build().expect("Failed to build window")
}