use irx_config::parsers::{env, json};
use irx_config::ConfigBuilder;
use serde::Deserialize;

#[derive(Deserialize)]
struct Conf {
    id: u32,
    logger: String,
    tag: String,
}

// Data from two parsers will be merged. The values from parser appended first (`JSON`)
// will take precedence if values have a same names
let config = ConfigBuilder::default()
    .append_parser(
        json::ParserBuilder::default()
            .default_path("config.json")
            .build()?,
    )
    .append_parser(
        env::ParserBuilder::default()
            .default_prefix("APP_")
            .build()?,
    )
    .load()?;

let conf_data: Conf = config.get()?;

use clap::App;
use irx_config::parsers::{cmd, env, toml};
use irx_config::ConfigBuilder;
use serde::Deserialize;

#[derive(Deserialize)]
struct Logger {
    level: String,
    path: String,
}

#[derive(Deserialize)]
struct Connection {
    #[serde(default = "localhost")]
    host: String,
    port: u16,
}

#[derive(Deserialize)]
struct Conf {
    id: u32,
    logger: Logger,
    connection: Connection,
}

let yaml = clap::load_yaml!("cmd.yaml");
let matches = App::from_yaml(yaml).get_matches();

// Data from three parsers will be merged. The values from parser appended first (`cmd`)
// will take precedence if values have a same names
let config = ConfigBuilder::default()
    .append_parser(
        cmd::ParserBuilder::default()
            .matches(matches)
            .try_arg_names_from_yaml(include_str!("cmd.yaml"))?
            .build()?,
    )
    .append_parser(
        toml::ParserBuilder::default()
            .default_path("config.toml")
            .path_option("config")
            .build()?,
    )
    .append_parser(
        env::ParserBuilder::default()
            .default_prefix("APP_")
            .prefix_option("prefix")
            .build()?,
    )
    .load()?;

let conf_data: Conf = config.get()?;

use irx_config::{AnyResult, Case, ConfigBuilder, Parse, Value};
use serde::Deserialize;
use std::borrow::Cow;

#[derive(Deserialize)]
struct Conf {
    id: u32,
    logger: String,
    tag: String,
}

struct JsonStringParser<'a> {
    data: Cow<'a, str>,
}

impl<'a> JsonStringParser<'a> {
    pub fn new(data: impl Into<Cow<'a, str>>) -> Self {
        JsonStringParser { data: data.into() }
    }
}

impl Case for JsonStringParser<'_> {}

impl Parse for JsonStringParser<'_> {
    fn parse(&mut self, _value: &Value) -> AnyResult<Value> {
        Ok(serde_json::from_str(&self.data)?)
    }
}

let data = r#"{ "id": 42, "logger": "file", "tag": "test" }"#;
let config = ConfigBuilder::load_one(JsonStringParser::new(data))?;
let conf_data: Conf = config.get()?;

use irx_config::parsers::json;
use irx_config::ConfigBuilder;
use serde::Deserialize;

#[derive(Deserialize)]
struct Logger {
    level: String,
    path: String,
}

#[derive(Deserialize)]
struct Connection {
    #[serde(default = "localhost")]
    host: String,
    port: u16,
}

let config = ConfigBuilder::load_one(
    json::ParserBuilder::default()
        .default_path("config.json")
        .build()?,
)?;

let logger: Logger = config.get_by_key_path("logger")?.unwrap();
let port: u16 = config.get_by_key_path("connection:port")?.unwrap();