use color_eyre::Result;
use std::sync::Arc;
use crate::shared::state::AppState;
pub struct Editor {
 file_path: String,
 bucket: String,
 key: String,
 content: String,
 cursor_pos: usize,
 scroll_offset: usize,
 modified: bool,
}
impl Editor {
 pub async fn load(app_state: &Arc<AppState>, bucket: &str, path: &str) -> Result<Self> {
 let content = if let Some(drive) = &app_state.drive {
 match drive.get_object().bucket(bucket).key(path).send().await {
 Ok(response) => {
 let bytes = response.body.collect().await?.into_bytes();
 String::from_utf8_lossy(&bytes).to_string()
 }
 Err(_) => String::new(),
 }
 } else {
 String::new()
 };
 Ok(Self {
 file_path: format!("{}/{}", bucket, path),
 bucket: bucket.to_string(),
 key: path.to_string(),
 content,
 cursor_pos: 0,
 scroll_offset: 0,
 modified: false,
 })
 }
 pub async fn save(&mut self, app_state: &Arc<AppState>) -> Result<()> {
 if let Some(drive) = &app_state.drive {
 drive.put_object()
 .bucket(&self.bucket)
 .key(&self.key)
 .body(self.content.as_bytes().to_vec().into())
 .send()
 .await?;
 self.modified = false;
 }
 Ok(())
 }
 pub fn file_path(&self) -> &str {
 &self.file_path
 }
 pub fn render(&self, cursor_blink: bool) -> String {
 let lines: Vec<&str> = self.content.lines().collect();
 let total_lines = lines.len().max(1);
 let visible_lines = 25;
 let cursor_line = self.content[..self.cursor_pos].lines().count();
 let cursor_col = self.content[..self.cursor_pos]
 .lines()
 .last()
 .map(|line| line.len())
 .unwrap_or(0);
 let start = self.scroll_offset;
 let end = (start + visible_lines).min(total_lines);
 let mut display_lines = Vec::new();
 for i in start..end {
 let line_num = i + 1;
 let line_content = if i < lines.len() { lines[i] } else { "" };
 let is_cursor_line = i == cursor_line;
 let cursor_indicator = if is_cursor_line && cursor_blink {
 let spaces = " ".repeat(cursor_col);
 format!("{}█", spaces)
 } else {
 String::new()
 };
 display_lines.push(format!(" {:4} │ {}{}", line_num, line_content, cursor_indicator));
 }
 if display_lines.is_empty() {
 let cursor_indicator = if cursor_blink { "█" } else { "" };
 display_lines.push(format!("    1 │ {}", cursor_indicator));
 }
 display_lines.push("".to_string());
 display_lines.push("─────────────────────────────────────────────────────────────".to_string());
 let status = if self.modified { "MODIFIED" } else { "SAVED" };
 display_lines.push(format!(" {} {} │ Line: {}, Col: {}",
 status, self.file_path, cursor_line + 1, cursor_col + 1));
 display_lines.push(" Ctrl+S: Save │ Ctrl+W: Close │ Esc: Close without saving".to_string());
 display_lines.join("\n")
 }
 pub fn move_up(&mut self) {
 if let Some(prev_line_end) = self.content[..self.cursor_pos].rfind('\n') {
 if let Some(prev_prev_line_end) = self.content[..prev_line_end].rfind('\n') {
 let target_pos = prev_prev_line_end + 1 + (self.cursor_pos - prev_line_end - 1).min(
 self.content[prev_prev_line_end + 1..prev_line_end].len()
 );
 self.cursor_pos = target_pos;
 } else {
 self.cursor_pos = (self.cursor_pos - prev_line_end - 1).min(prev_line_end);
 }
 }
 }
 pub fn move_down(&mut self) {
 if let Some(next_line_start) = self.content[self.cursor_pos..].find('\n') {
 let current_line_start = self.content[..self.cursor_pos].rfind('\n').map(|pos| pos + 1).unwrap_or(0);
 let next_line_absolute = self.cursor_pos + next_line_start + 1;
 if let Some(next_next_line_start) = self.content[next_line_absolute..].find('\n') {
 let target_pos = next_line_absolute + (self.cursor_pos - current_line_start).min(next_next_line_start);
 self.cursor_pos = target_pos;
 } else {
 let target_pos = next_line_absolute + (self.cursor_pos - current_line_start).min(
 self.content[next_line_absolute..].len()
 );
 self.cursor_pos = target_pos;
 }
 }
 }
 pub fn move_left(&mut self) {
 if self.cursor_pos > 0 {
 self.cursor_pos -= 1;
 }
 }
 pub fn move_right(&mut self) {
 if self.cursor_pos < self.content.len() {
 self.cursor_pos += 1;
 }
 }
 pub fn insert_char(&mut self, c: char) {
 self.modified = true;
 self.content.insert(self.cursor_pos, c);
 self.cursor_pos += 1;
 }
 pub fn backspace(&mut self) {
 if self.cursor_pos > 0 {
 self.modified = true;
 self.content.remove(self.cursor_pos - 1);
 self.cursor_pos -= 1;
 }
 }
 pub fn insert_newline(&mut self) {
 self.modified = true;
 self.content.insert(self.cursor_pos, '\n');
 self.cursor_pos += 1;
 }
}