aha 0.2.5

//! RMBG2.0 exec implementation for CLI `run` subcommand

use std::time::Instant;

use anyhow::{Ok, Result};

use crate::exec::ExecModel;
use crate::models::rmbg2_0::generate::RMBG2_0Model;

pub struct RMBG2_0Exec;

impl ExecModel for RMBG2_0Exec {
    fn run(input: &[String], output: Option<&str>, weight_path: &str) -> Result<()> {
        let url = &input[0];
        let input_url = if url.starts_with("http://")
            || url.starts_with("https://")
            || url.starts_with("file://")
        {
            url.clone()
        } else {
            format!("file://{}", url)
        };

        let i_start = Instant::now();
        let model = RMBG2_0Model::init(weight_path, None, None)?;
        let i_duration = i_start.elapsed();
        println!("Time elapsed in load model is: {:?}", i_duration);

        // Create ChatCompletionParameters for image background removal
        let message = format!(
            r#"{{
            "model": "AI-ModelScope/RMBG-2.0",
            "messages": [
                {{
                    "role": "user",
                    "content": [
                        {{
                            "type": "image",
                            "image_url": {{
                                "url": "{}"
                            }}
                        }}
                    ]
                }}
            ]
        }}"#,
            input_url
        );
        let mes = serde_json::from_str(&message)?;

        let i_start = Instant::now();
        let result = model.inference(mes)?;
        let i_duration = i_start.elapsed();
        println!("Time elapsed in generate is: {:?}", i_duration);

        let output_path = if let Some(out) = output {
            out.to_string()
        } else {
            let timestamp = std::time::SystemTime::now()
                .duration_since(std::time::UNIX_EPOCH)?
                .as_secs();
            format!("rmbg_{}.png", timestamp)
        };

        // Save all result images
        for (i, img) in result.iter().enumerate() {
            let path = if result.len() == 1 {
                output_path.clone()
            } else {
                format!("{}_{}.png", output_path.trim_end_matches(".png"), i)
            };
            img.save(&path)?;
            println!("Output saved to: {}", path);
        }

        Ok(())
    }
}