//! ## AuthActivity
//!
//! `auth_activity` is the module which implements the authentication activity

use std::env;

use super::{AuthActivity, FileTransferParams, FileTransferProtocol, FormTab, HostBridgeProtocol};
use crate::filetransfer::HostBridgeParams;
use crate::filetransfer::params::ProtocolParams;
use crate::system::auto_update::{Release, Update, UpdateStatus};
use crate::system::notifications::Notification;

impl AuthActivity {
    /// Get the default port for protocol
    pub(super) fn get_default_port_for_protocol(protocol: FileTransferProtocol) -> u16 {
        match protocol {
            FileTransferProtocol::Sftp | FileTransferProtocol::Scp => 22,
            FileTransferProtocol::Ftp(_) => 21,
            FileTransferProtocol::AwsS3 => 22, // Doesn't matter, since not used
            FileTransferProtocol::Kube => 22,  // Doesn't matter, since not used
            FileTransferProtocol::Smb => 445,
            FileTransferProtocol::WebDAV => 80, // Doesn't matter, since not used
        }
    }

    /// Returns whether the port is standard or not
    pub(super) fn is_port_standard(port: u16) -> bool {
        port < 1024
    }

    /// Check minimum window size window
    pub(super) fn check_minimum_window_size(&mut self, height: u16) {
        if height < 25 {
            // Mount window error
            self.mount_size_err();
        } else {
            self.umount_size_err();
        }
    }

    /// Collect host params as `FileTransferParams`
    pub(super) fn collect_host_bridge_params(&self) -> Result<HostBridgeParams, &'static str> {
        match self.host_bridge_protocol {
            HostBridgeProtocol::Localhost => self.collect_localhost_host_params(),
            HostBridgeProtocol::Remote(remote) => {
                let transfer_params = match remote {
                    FileTransferProtocol::AwsS3 => self.collect_s3_host_params(FormTab::HostBridge),
                    FileTransferProtocol::Kube => {
                        self.collect_kube_host_params(FormTab::HostBridge)
                    }
                    FileTransferProtocol::Smb => self.collect_smb_host_params(FormTab::HostBridge),
                    FileTransferProtocol::Ftp(_)
                    | FileTransferProtocol::Scp
                    | FileTransferProtocol::Sftp => {
                        self.collect_generic_host_params(remote, FormTab::HostBridge)
                    }
                    FileTransferProtocol::WebDAV => {
                        self.collect_webdav_host_params(FormTab::HostBridge)
                    }
                }?;

                Ok(HostBridgeParams::Remote(
                    transfer_params.protocol,
                    transfer_params.params,
                ))
            }
        }
    }

    /// Collect host params as `FileTransferParams`
    pub(super) fn collect_remote_host_params(&self) -> Result<FileTransferParams, &'static str> {
        match self.remote_protocol {
            FileTransferProtocol::AwsS3 => self.collect_s3_host_params(FormTab::Remote),
            FileTransferProtocol::Kube => self.collect_kube_host_params(FormTab::Remote),
            FileTransferProtocol::Smb => self.collect_smb_host_params(FormTab::Remote),
            FileTransferProtocol::Ftp(_)
            | FileTransferProtocol::Scp
            | FileTransferProtocol::Sftp => {
                self.collect_generic_host_params(self.remote_protocol, FormTab::Remote)
            }
            FileTransferProtocol::WebDAV => self.collect_webdav_host_params(FormTab::Remote),
        }
    }

    fn collect_localhost_host_params(&self) -> Result<HostBridgeParams, &'static str> {
        // get remote local path
        let remote_local_path = self.get_input_local_directory(FormTab::Remote);

        // Local path is:
        // - the input local path if set
        // - the remote local path if set
        // - the current directory if neither is set
        let path = self
            .get_input_local_directory(FormTab::HostBridge)
            .or(remote_local_path)
            .unwrap_or_else(|| env::current_dir().unwrap_or_default());

        Ok(HostBridgeParams::Localhost(path))
    }

    /// Get input values from fields or return an error if fields are invalid to work as generic
    pub(super) fn collect_generic_host_params(
        &self,
        protocol: FileTransferProtocol,
        form_tab: FormTab,
    ) -> Result<FileTransferParams, &'static str> {
        let params = self.get_generic_params_input(form_tab);
        if params.address.is_empty() {
            return Err("Invalid host");
        }
        if params.port == 0 {
            return Err("Invalid port");
        }
        Ok(FileTransferParams {
            protocol,
            params: ProtocolParams::Generic(params),
            local_path: self.get_input_local_directory(form_tab),
            remote_path: self.get_input_remote_directory(form_tab),
        })
    }

    /// Get input values from fields or return an error if fields are invalid to work as aws s3
    pub(super) fn collect_s3_host_params(
        &self,
        form_tab: FormTab,
    ) -> Result<FileTransferParams, &'static str> {
        let params = self.get_s3_params_input(form_tab);
        if params.bucket_name.is_empty() {
            return Err("Invalid bucket");
        }
        Ok(FileTransferParams {
            protocol: FileTransferProtocol::AwsS3,
            params: ProtocolParams::AwsS3(params),
            local_path: self.get_input_local_directory(form_tab),
            remote_path: self.get_input_remote_directory(form_tab),
        })
    }

    /// Get input values from fields or return an error if fields are invalid to work as aws s3
    pub(super) fn collect_kube_host_params(
        &self,
        form_tab: FormTab,
    ) -> Result<FileTransferParams, &'static str> {
        let params = self.get_kube_params_input(form_tab);

        Ok(FileTransferParams {
            protocol: FileTransferProtocol::Kube,
            params: ProtocolParams::Kube(params),
            local_path: self.get_input_local_directory(form_tab),
            remote_path: self.get_input_remote_directory(form_tab),
        })
    }

    pub(super) fn collect_smb_host_params(
        &self,
        form_tab: FormTab,
    ) -> Result<FileTransferParams, &'static str> {
        let params = self.get_smb_params_input(form_tab);
        if params.address.is_empty() {
            return Err("Invalid address");
        }
        #[cfg(posix)]
        if params.port == 0 {
            return Err("Invalid port");
        }
        if params.share.is_empty() {
            return Err("Invalid share");
        }
        Ok(FileTransferParams {
            protocol: FileTransferProtocol::Smb,
            params: ProtocolParams::Smb(params),
            local_path: self.get_input_local_directory(form_tab),
            remote_path: self.get_input_remote_directory(form_tab),
        })
    }

    pub(super) fn collect_webdav_host_params(
        &self,
        form_tab: FormTab,
    ) -> Result<FileTransferParams, &'static str> {
        let params = self.get_webdav_params_input(form_tab);
        if params.uri.is_empty() {
            return Err("Invalid URI");
        }
        Ok(FileTransferParams {
            protocol: FileTransferProtocol::WebDAV,
            params: ProtocolParams::WebDAV(params),
            local_path: self.get_input_local_directory(form_tab),
            remote_path: self.get_input_remote_directory(form_tab),
        })
    }

    // -- update install

    /// If enabled in configuration, check for updates from Github
    pub(super) fn check_for_updates(&mut self) {
        debug!("Check for updates...");
        // Check version only if unset in the store
        let ctx = self.context_mut();
        if !ctx.store().isset(super::STORE_KEY_LATEST_VERSION) {
            debug!("Version is not set in storage");
            if ctx.config().get_check_for_updates() {
                debug!("Check for updates is enabled");
                // Send request
                match Update::is_new_version_available() {
                    Ok(Some(Release { version, body })) => {
                        // If some, store version and release notes
                        info!("Latest version is: {}", version);
                        if ctx.config().get_notifications() {
                            // Notify new version available
                            Notification::update_available(version.as_str());
                        }
                        // Store info
                        ctx.store_mut()
                            .set_string(super::STORE_KEY_LATEST_VERSION, version);
                        ctx.store_mut()
                            .set_string(super::STORE_KEY_RELEASE_NOTES, body);
                    }
                    Ok(None) => {
                        info!("Latest version is: {} (current)", env!("CARGO_PKG_VERSION"));
                        // Just set flag as check
                        ctx.store_mut().set(super::STORE_KEY_LATEST_VERSION);
                    }
                    Err(err) => {
                        // Report error
                        error!("Failed to get latest version: {}", err);
                        self.mount_error(
                            format!("Could not check for new updates: {err}").as_str(),
                        );
                    }
                }
            } else {
                info!("Check for updates is disabled");
            }
        }
    }

    /// Install latest termscp version via GUI
    pub(super) fn install_update(&mut self) {
        // Umount release notes
        self.umount_release_notes();
        // Mount wait box
        self.mount_wait("Installing update. Please wait…");
        // Refresh UI
        self.view();
        // Install update
        let result = Update::default().show_progress(false).upgrade();
        // Umount wait
        self.umount_wait();
        // Show outcome
        match result {
            Ok(UpdateStatus::AlreadyUptodate) => self.mount_info("termscp is already up to date!"),
            Ok(UpdateStatus::UpdateInstalled(ver)) => {
                if self.config().get_notifications() {
                    Notification::update_installed(ver.as_str());
                }
                self.mount_info(format!("termscp has been updated to version {ver}!"))
            }
            Err(err) => {
                if self.config().get_notifications() {
                    Notification::update_failed(err.to_string());
                }
                self.mount_error(format!("Could not install update: {err}"))
            }
        }
    }
}