use color_eyre::Result;
use std::sync::Arc;
use crate::shared::state::AppState;
#[derive(Debug, Clone)]
pub enum TreeNode {
 Bucket { name: String },
 Folder { bucket: String, path: String },
 File { bucket: String, path: String },
}
pub struct FileTree {
 app_state: Arc<AppState>,
 items: Vec<(String, TreeNode)>,
 selected: usize,
 current_bucket: Option<String>,
 current_path: Vec<String>,
}
impl FileTree {
 pub fn new(app_state: Arc<AppState>) -> Self {
 Self {
 app_state,
 items: Vec::new(),
 selected: 0,
 current_bucket: None,
 current_path: Vec::new(),
 }
 }
 pub async fn load_root(&mut self) -> Result<()> {
 self.items.clear();
 self.current_bucket = None;
 self.current_path.clear();
 if let Some(drive) = &self.app_state.drive {
 let result = drive.list_buckets().send().await;
 match result {
 Ok(response) => {
 let buckets = response.buckets();
 for bucket in buckets {
 if let Some(name) = bucket.name() {
 let icon = if name.ends_with(".gbai") { "🤖" } else { "📦" };
 let display = format!("{} {}", icon, name);
 self.items.push((display, TreeNode::Bucket { name: name.to_string() }));
 }
 }
 }
 Err(e) => {
 self.items.push((format!("✗ Error: {}", e), TreeNode::Bucket { name: String::new() }));
 }
 }
 } else {
 self.items.push(("✗ Drive not connected".to_string(), TreeNode::Bucket { name: String::new() }));
 }
 if self.items.is_empty() {
 self.items.push(("(no buckets found)".to_string(), TreeNode::Bucket { name: String::new() }));
 }
 self.selected = 0;
 Ok(())
 }
 pub async fn enter_bucket(&mut self, bucket: String) -> Result<()> {
 self.current_bucket = Some(bucket.clone());
 self.current_path.clear();
 self.load_bucket_contents(&bucket, "").await
 }
 pub async fn enter_folder(&mut self, bucket: String, path: String) -> Result<()> {
 self.current_bucket = Some(bucket.clone());
 let parts: Vec<&str> = path.trim_matches('/').split('/').filter(|s| !s.is_empty()).collect();
 self.current_path = parts.iter().map(|s| s.to_string()).collect();
 self.load_bucket_contents(&bucket, &path).await
 }
 pub fn go_up(&mut self) -> bool {
 if self.current_path.is_empty() {
 if self.current_bucket.is_some() {
 self.current_bucket = None;
 return true;
 }
 return false;
 }
 self.current_path.pop();
 true
 }
 pub async fn refresh_current(&mut self) -> Result<()> {
 if let Some(bucket) = &self.current_bucket.clone() {
 let path = self.current_path.join("/");
 self.load_bucket_contents(bucket, &path).await
 } else {
 self.load_root().await
 }
 }
 async fn load_bucket_contents(&mut self, bucket: &str, prefix: &str) -> Result<()> {
 self.items.clear();
 self.items.push(("⬆️  .. (go back)".to_string(), TreeNode::Folder {
 bucket: bucket.to_string(),
 path: "..".to_string(),
 }));
 if let Some(drive) = &self.app_state.drive {
 let normalized_prefix = if prefix.is_empty() {
 String::new()
 } else if prefix.ends_with('/') {
 prefix.to_string()
 } else {
 format!("{}/", prefix)
 };
 let mut continuation_token = None;
 let mut all_keys = Vec::new();
 loop {
 let mut request = drive.list_objects_v2().bucket(bucket);
 if !normalized_prefix.is_empty() {
 request = request.prefix(&normalized_prefix);
 }
 if let Some(token) = continuation_token {
 request = request.continuation_token(token);
 }
 let result = request.send().await?;
 for obj in result.contents() {
 if let Some(key) = obj.key() {
 all_keys.push(key.to_string());
 }
 }
 if !result.is_truncated.unwrap_or(false) {
 break;
 }
 continuation_token = result.next_continuation_token;
 }
 let mut folders = std::collections::HashSet::new();
 let mut files = Vec::new();
 for key in all_keys {
 if key == normalized_prefix {
 continue;
 }
 let relative = if !normalized_prefix.is_empty() && key.starts_with(&normalized_prefix) {
 &key[normalized_prefix.len()..]
 } else {
 &key
 };
 if relative.is_empty() {
 continue;
 }
 if let Some(slash_pos) = relative.find('/') {
 let folder_name = &relative[..slash_pos];
 if !folder_name.is_empty() {
 folders.insert(folder_name.to_string());
 }
 } else {
 files.push((relative.to_string(), key.clone()));
 }
 }
 let mut folder_vec: Vec<String> = folders.into_iter().collect();
 folder_vec.sort();
 for folder_name in folder_vec {
 let full_path = if normalized_prefix.is_empty() {
 folder_name.clone()
 } else {
 format!("{}{}", normalized_prefix, folder_name)
 };
 let display = format!("📁 {}/", folder_name);
 self.items.push((display, TreeNode::Folder {
 bucket: bucket.to_string(),
 path: full_path,
 }));
 }
 files.sort_by(|(a, _), (b, _)| a.cmp(b));
 for (name, full_path) in files {
 let icon = if name.ends_with(".bas") {
 "⚙️"
 } else if name.ends_with(".ast") {
 "🔧"
 } else if name.ends_with(".csv") {
 "📊"
 } else if name.ends_with(".gbkb") {
 "📚"
 } else if name.ends_with(".json") {
 "🔖"
 } else {
 "📄"
 };
 let display = format!("{} {}", icon, name);
 self.items.push((display, TreeNode::File {
 bucket: bucket.to_string(),
 path: full_path,
 }));
 }
 }
 if self.items.len() == 1 {
 self.items.push(("(empty folder)".to_string(), TreeNode::Folder {
 bucket: bucket.to_string(),
 path: String::new(),
 }));
 }
 self.selected = 0;
 Ok(())
 }
 pub fn render_items(&self) -> &[(String, TreeNode)] {
 &self.items
 }
 pub fn selected_index(&self) -> usize {
 self.selected
 }
 pub fn get_selected_node(&self) -> Option<&TreeNode> {
 self.items.get(self.selected).map(|(_, node)| node)
 }
 pub fn get_selected_bot(&self) -> Option<String> {
 if let Some(bucket) = &self.current_bucket {
 if bucket.ends_with(".gbai") {
 return Some(bucket.trim_end_matches(".gbai").to_string());
 }
 }
 if let Some((_, node)) = self.items.get(self.selected) {
 match node {
 TreeNode::Bucket { name } => {
 if name.ends_with(".gbai") {
 return Some(name.trim_end_matches(".gbai").to_string());
 }
 }
 _ => {}
 }
 }
 None
 }
 pub fn move_up(&mut self) {
 if self.selected > 0 {
 self.selected -= 1;
 }
 }
 pub fn move_down(&mut self) {
 if self.selected < self.items.len().saturating_sub(1) {
 self.selected += 1;
 }
 }
}