neapolitan 0.2.0

use std::env::args;
use std::fs::{read_to_string, write};
use std::process;
use serde_json::{from_str, to_string_pretty};
use neapolitan::NodalAnalysisStudyBuilder;

fn main()
{
    let args: Vec<String> = args().collect();

    let model_json = match read_to_string(&args[1]) 
    {
        Ok(o) => o,
        Err(e) => 
        {
            println!("[neapolitan].....ERR: could not find the specified filepath!");
            println!("[neapolitan].....ERR: {e}");
            process::exit(1);
        }
    };

    let model = match from_str(&model_json)
    {
        Ok(o) => o,
        Err(e) =>
        {
            println!("[neapolitan].....ERR: failed to read model from json file!");
            println!("[neapolitan].....ERR: {e}");
            process::exit(1);
        }
    };

    let solution = match NodalAnalysisStudyBuilder::from_model_with_default_config(model).run_study()
    {
        Ok(o) => o,
        Err(e) => 
        {
            println!("[neapolitan].....ERR: failed to solve the given model!");
            println!("[neapolitan].....ERR: {e}");
            process::exit(1);
        }
    };

    let solution_json = match to_string_pretty(&solution)
    {
        Ok(o) => o,
        Err(e) => 
        {
            println!("[neapolitan].....ERR: failed to format solution file!");
            println!("[neapolitan].....ERR: {e}");
            process::exit(1);
        }
    };

    let solution_file = args[1].replace(".json", ".soln.json");
    match write(solution_file, solution_json) 
    {
        Ok(_) => process::exit(0),
        Err(e) => {
            println!("[neapolitan].....ERR: neapolitan could not write to the output file!");
            println!("[neapolitan].....ERR: {e}");
            process::exit(1);
        }
    }
}