use rust_util::util_os::get_user_home;
use serde::Deserialize;
use std::collections::BTreeMap;
use std::fs;
use std::path::PathBuf;
use crate::util::{SCRIPT_DOT_EXT, SCRIPT_HYPHEN_EXT};

#[cfg(feature = "switch-rust-lang")]
const FILE_META: &str = "https://git.hatter.ink/rust-scripts/scriptbase/raw/branch/main/script-meta.json";
#[cfg(feature = "switch-go-lang")]
const FILE_META: &str = "https://git.hatter.ink/hatter/go-scripts/raw/branch/main/script-meta.json";
#[cfg(feature = "switch-js-lang")]
const FILE_META: &str = "https://git.hatter.ink/hatter/js-scripts/raw/branch/main/script-meta.json";
#[cfg(feature = "switch-dart-lang")]
const FILE_META: &str = "https://git.hatter.ink/hatter/dart-scripts/raw/branch/main/script-meta.json";

#[derive(Deserialize)]
struct ScriptMeta {
    script_name: String,
    script_length: u64,
    script_sha256: String,
}

pub fn list_scripts(filter: Option<&String>) {
    debugging!("Loading URL: {}", FILE_META);
    let response = reqwest::blocking::get(FILE_META).unwrap_or_else(|e| {
        failure_and_exit!("Get file-meta.json failed: {}", e);
    });
    debugging!("Load response: {}", response.status().as_u16());
    if response.status().as_u16() != 200 {
        failure_and_exit!("Get file-meta.json failed, status: {}", response.status().as_u16());
    }
    let text = response.text().unwrap_or_else(|e| {
        failure_and_exit!("Get file-meta.json failed: {}", e);
    });
    debugging!("Response text: {}", &text);

    let user_home = get_user_home().expect("Get user home failed!");
    let script_meta_map: BTreeMap<String, ScriptMeta> = serde_json::from_str(&text).expect("Parse script-meta.json failed.");

    let mut messages = vec![];
    for (_, script_meta) in &script_meta_map {
        let script_name = &script_meta.script_name;
        let real_script_name = if script_name.ends_with(SCRIPT_HYPHEN_EXT) {
            script_name.chars().take(script_name.len() - SCRIPT_HYPHEN_EXT.len()).collect::<String>() + SCRIPT_DOT_EXT
        } else {
            script_name.to_string()
        };

        if let Some(filter) = filter {
            if !real_script_name.contains(filter) {
                // NOT CONTAINS `filter`, SKIP
                continue;
            }
        }

        let full_script_path = PathBuf::from(&user_home).join("bin").join(&real_script_name);
        let is_script_exists = full_script_path.is_file();
        let script_sha256 = if is_script_exists {
            let script_content = fs::read(&full_script_path).unwrap_or(vec![]);
            sha256::digest(&script_content)
        } else {
            "".to_string()
        };
        let is_script_matches = script_sha256 == script_meta.script_sha256;
        let script_size = rust_util::util_size::get_display_size(script_meta.script_length as i64);
        let padding_length = 40 - real_script_name.len();
        messages.push(format!("- {} {} {} {}",
                              iff!(is_script_exists, iff!(is_script_matches, "✅", "✔️ "), "➖"),
                              real_script_name,
                              ".".repeat(iff!(padding_length < 1, 1, padding_length)),
                              script_size,
        ));
    }
    if filter.is_some() {
        messages.insert(0, format!("Total {} script(s), found {} script(s):", script_meta_map.len(), messages.len()));
    } else {
        messages.insert(0, format!("Found {} script(s):", script_meta_map.len()));
    }
    success!("{}", messages.join("\n"));
}