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use crate::build::*;
use crate::channel::*;
use crate::err::SdResult;

use chrono::Local;
use std::env;
use std::process::Command;

use std::cell::RefCell;
use std::collections::HashMap;

#[derive(Default, Debug)]
pub struct SystemEnv {
    map: HashMap<ShadowConst, RefCell<ConstVal>>,
}

const BUILD_OS: ShadowConst = "BUILD_OS";
const RUST_VERSION: ShadowConst = "RUST_VERSION";
const RUST_CHANNEL: ShadowConst = "RUST_CHANNEL";
const CARGO_VERSION: ShadowConst = "CARGO_VERSION";
const CARGO_LOCK: ShadowConst = "CARGO_LOCK";
// const CARGO_TREE: &str = "CARGO_TREE";

impl SystemEnv {
    pub fn new() -> HashMap<ShadowConst, RefCell<ConstVal>> {
        let mut env = SystemEnv::default();
        env.map.insert(
            BUILD_OS,
            RefCell::new(ConstVal {
                desc: "display build system os".to_string(),
                v: format!("{}-{}", env::consts::OS, env::consts::ARCH),
                t: ConstType::Str,
            }),
        );

        env.map.insert(
            RUST_CHANNEL,
            ConstVal::new("display build system rust channel"),
        );
        env.map.insert(
            RUST_VERSION,
            ConstVal::new("display build system rust version"),
        );
        env.map.insert(
            CARGO_VERSION,
            ConstVal::new("display build system cargo version"),
        );
        env.map.insert(
            CARGO_LOCK,
            ConstVal::new("display build project dependence cargo lock detail"),
        );

        if let Err(e) = env.init() {
            println!("{}", e.to_string());
        }
        env.map
    }

    fn init(&mut self) -> SdResult<()> {
        let update_val = |c: ShadowConst, v: String| {
            if let Some(c) = self.map.get(c) {
                let mut val = c.borrow_mut();
                val.t = ConstType::Str;
                val.v = v.to_string();
            }
        };
        if let Ok(out) = Command::new("rustup").arg("default").output() {
            update_val(
                RUST_CHANNEL,
                String::from_utf8(out.stdout)?.trim().to_string(),
            );
        }

        if let Ok(out) = Command::new("rustc").arg("-V").output() {
            update_val(
                RUST_VERSION,
                String::from_utf8(out.stdout)?.trim().to_string(),
            );
        }

        if let Ok(out) = Command::new("cargo").arg("-V").output() {
            update_val(
                CARGO_VERSION,
                String::from_utf8(out.stdout)?.trim().to_string(),
            );
        }
        Ok(())
    }
}

#[derive(Default, Debug)]
pub struct Project {
    map: HashMap<ShadowConst, RefCell<ConstVal>>,
}

const PROJECT_NAME: ShadowConst = "PROJECT_NAME";
const BUILD_TIME: ShadowConst = "BUILD_TIME";
const BUILD_RUST_CHANNEL: ShadowConst = "BUILD_RUST_CHANNEL";

impl Project {
    pub fn new() -> HashMap<ShadowConst, RefCell<ConstVal>> {
        let mut project = Project::default();
        project.map.insert(
            BUILD_TIME,
            RefCell::new(ConstVal {
                desc: "display project build time".to_string(),
                v: Local::now().format("%Y-%m-%d %H:%M:%S").to_string(),
                t: ConstType::Str,
            }),
        );
        project.map.insert(
            BUILD_RUST_CHANNEL,
            RefCell::new(ConstVal {
                desc: "display project build by rust channel [debug or release]".to_string(),
                v: build_channel().to_string(),
                t: ConstType::Str,
            }),
        );
        project
            .map
            .insert(PROJECT_NAME, ConstVal::new("display project name"));

        if let (Some(v), Some(c)) = (option_env!("CARGO_PKG_NAME"), project.map.get(PROJECT_NAME)) {
            let mut val = c.borrow_mut();
            val.t = ConstType::Str;
            val.v = v.to_string();
        }

        project.map
    }
}