use std::fs;
use tauri::AppHandle;

use serde::{Deserialize, Serialize};
use std::path::PathBuf;
use tauri::Manager;

use super::setup;

const CONFIGURATION_FILE_NAME: &str = "settings.json";

#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct AppConfiguration {
    pub data_folder: String,
    // Add other fields as needed
}
impl AppConfiguration {
    pub fn default() -> Self {
        Self {
            data_folder: String::from("./data"), // Set a default value for the data_folder
                                                 // Add other fields with default values as needed
        }
    }
}

#[tauri::command]
pub fn get_app_configurations(app_handle: tauri::AppHandle) -> AppConfiguration {
    let mut app_default_configuration = AppConfiguration::default();

    if std::env::var("CI").unwrap_or_default() == "e2e" {
        return app_default_configuration;
    }

    let configuration_file = get_configuration_file_path(app_handle.clone());

    let default_data_folder = default_data_folder_path(app_handle.clone());

    if !configuration_file.exists() {
        println!(
            "App config not found, creating default config at {:?}",
            configuration_file
        );

        app_default_configuration.data_folder = default_data_folder;

        if let Err(err) = fs::write(
            &configuration_file,
            serde_json::to_string(&app_default_configuration).unwrap(),
        ) {
            eprintln!("Failed to create default config: {}", err);
        }

        return app_default_configuration;
    }

    match fs::read_to_string(&configuration_file) {
        Ok(content) => match serde_json::from_str::<AppConfiguration>(&content) {
            Ok(app_configurations) => app_configurations,
            Err(err) => {
                eprintln!(
                    "Failed to parse app config, returning default config instead. Error: {}",
                    err
                );
                app_default_configuration
            }
        },
        Err(err) => {
            eprintln!(
                "Failed to read app config, returning default config instead. Error: {}",
                err
            );
            app_default_configuration
        }
    }
}

#[tauri::command]
pub fn update_app_configuration(
    app_handle: tauri::AppHandle,
    configuration: AppConfiguration,
) -> Result<(), String> {
    let configuration_file = get_configuration_file_path(app_handle);
    println!(
        "update_app_configuration, configuration_file: {:?}",
        configuration_file
    );

    fs::write(
        configuration_file,
        serde_json::to_string(&configuration).map_err(|e| e.to_string())?,
    )
    .map_err(|e| e.to_string())
}

#[tauri::command]
pub fn get_jan_data_folder_path(app_handle: tauri::AppHandle) -> PathBuf {
    let app_configurations = get_app_configurations(app_handle);
    PathBuf::from(app_configurations.data_folder)
}

#[tauri::command]
pub fn get_jan_extensions_path(app_handle: tauri::AppHandle) -> PathBuf {
    get_jan_data_folder_path(app_handle).join("extensions")
}

#[tauri::command]
pub fn get_themes(app_handle: tauri::AppHandle) -> Vec<String> {
    let mut themes = vec![];
    let themes_path = get_jan_data_folder_path(app_handle).join("themes");
    if themes_path.exists() {
        for entry in fs::read_dir(themes_path).unwrap() {
            let entry = entry.unwrap();
            if entry.path().is_dir() {
                if let Some(name) = entry.file_name().to_str() {
                    themes.push(name.to_string());
                }
            }
        }
    }
    themes
}

#[tauri::command]
pub fn read_theme(app_handle: tauri::AppHandle, theme_name: String) -> Result<String, String> {
    let themes_path = get_jan_data_folder_path(app_handle)
        .join("themes")
        .join(theme_name.clone())
        .join("theme.json");
    if themes_path.exists() {
        let content = fs::read_to_string(themes_path).map_err(|e| e.to_string())?;
        Ok(content)
    } else {
        Err(format!("Theme {} not found", theme_name.clone()))
    }
}

#[tauri::command]
pub fn get_configuration_file_path(app_handle: tauri::AppHandle) -> PathBuf {
    let app_path = app_handle.path().app_data_dir().unwrap_or_else(|err| {
        let home_dir = std::env::var(if cfg!(target_os = "windows") {
            "USERPROFILE"
        } else {
            "HOME"
        })
        .expect("Failed to determine the home directory");

        PathBuf::from(home_dir)
    });

    app_path.join(CONFIGURATION_FILE_NAME)
}

#[tauri::command]
pub fn default_data_folder_path(app_handle: tauri::AppHandle) -> String {
    return app_handle
        .path()
        .app_data_dir()
        .unwrap()
        .to_str()
        .unwrap()
        .to_string();
}

#[tauri::command]
pub fn relaunch(app: AppHandle) {
    app.restart()
}

#[tauri::command]
pub fn open_app_directory(app: AppHandle) {
    let app_path = app.path().app_data_dir().unwrap();
    if cfg!(target_os = "windows") {
        std::process::Command::new("explorer")
            .arg(app_path)
            .spawn()
            .expect("Failed to open app directory");
    } else if cfg!(target_os = "macos") {
        std::process::Command::new("open")
            .arg(app_path)
            .spawn()
            .expect("Failed to open app directory");
    } else {
        std::process::Command::new("xdg-open")
            .arg(app_path)
            .spawn()
            .expect("Failed to open app directory");
    }
}

#[tauri::command]
pub fn open_file_explorer(path: String) {
    let path = PathBuf::from(path);
    if cfg!(target_os = "windows") {
        std::process::Command::new("explorer")
            .arg(path)
            .spawn()
            .expect("Failed to open file explorer");
    } else if cfg!(target_os = "macos") {
        std::process::Command::new("open")
            .arg(path)
            .spawn()
            .expect("Failed to open file explorer");
    } else {
        std::process::Command::new("xdg-open")
            .arg(path)
            .spawn()
            .expect("Failed to open file explorer");
    }
}

#[tauri::command]
pub fn install_extensions(app: AppHandle) {
    if let Err(err) = setup::install_extensions(app, true) {
        eprintln!("Failed to install extensions: {}", err);
    }
}

#[tauri::command]
pub fn get_active_extensions(app: AppHandle) -> Vec<serde_json::Value> {
    let mut path = get_jan_extensions_path(app);
    path.push("extensions.json");
    println!("get jan extensions, path: {:?}", path);

    let contents = fs::read_to_string(path);
    let contents: Vec<serde_json::Value> = match contents {
        Ok(data) => match serde_json::from_str::<Vec<serde_json::Value>>(&data) {
            Ok(exts) => exts
                .into_iter()
                .map(|ext| {
                    serde_json::json!({
                        "url": ext["url"],
                        "name": ext["name"],
                        "productName": ext["productName"],
                        "active": ext["_active"],
                        "description": ext["description"],
                        "version": ext["version"]
                    })
                })
                .collect(),
            Err(_) => vec![],
        },
        Err(_) => vec![],
    };
    return contents;
}

#[tauri::command]
pub fn get_user_home_path(app: AppHandle) -> String {
    return get_app_configurations(app.clone()).data_folder;
}