// bibiman - a TUI for managing BibLaTeX databases
// Copyright (C) 2024  lukeflo
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
/////

use std::path::PathBuf;

use color_eyre::eyre::Result;
use config::{ConfigError, FileFormat};
use serde::Deserialize;

use crate::cliargs::CLIArgs;

/// Main struct of the config file. Contains substructs/headings in toml
#[derive(Debug, Clone, Deserialize)]
pub struct BibiConfig {
    pub general: General,
}

/// Substruct [general] in config.toml
#[derive(Debug, Clone, Deserialize)]
pub struct General {
    pub bibfiles: Option<Vec<PathBuf>>,
    pub editor: Option<String>,
    pub pdf_opener: Option<String>,
    pub url_opener: Option<String>,
}

impl BibiConfig {
    pub fn default() -> Self {
        Self {
            general: General {
                bibfiles: None,
                editor: None,
                pdf_opener: None,
                url_opener: None,
            },
        }
    }

    pub fn new(args: &CLIArgs) -> Result<Self> {
        // let mut cfg = config::Config::builder();
        // cfg = cfg.add_source(
        //     config::File::from(args.cfg_path.clone())
        //         .format(FileFormat::Toml)
        //         .required(false),
        // );
        // cfg.build()?.try_deserialize()
        Ok(Self::parse_cfg_file(args)?)
    }

    fn parse_cfg_file(args: &CLIArgs) -> Result<Self, ConfigError> {
        let mut cfg = config::Config::builder();
        cfg = cfg.add_source(
            config::File::from(args.cfg_path.clone())
                .format(FileFormat::Toml)
                .required(false),
        );
        cfg.build()?.try_deserialize()
    }
}