use std::path::PathBuf;

use polyio::Checksum;
use serde::{Deserialize, Serialize};

use crate::vendors::JavaVendor;

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct JavaRuntime {
    pub absolute_path: String,
    pub major: u32,
    pub version: String,
    pub vendor: JavaVendor,
    pub os_arch: String,
    pub is_jdk: bool,
    pub probe_version: u32,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct JavaPackage {
    pub download_url: String,
    pub name: String,
    pub java_version: Vec<u32>,
    pub vendor: JavaVendor,
    pub archive: PackageArchive,
    /// Algorithm varies per vendor
    /// `None` when vendor metadata omitted or malformed it
    /// installs unverified rather than failing
    pub checksum: Option<Checksum>,
    /// Bytes when the vendor publishes it
    pub size: Option<u64>,
}

impl JavaPackage {
    /// Drops malformed vendor checksums which would otherwise make every
    /// install fail as a corrupt download
    #[must_use]
    pub fn with_checksum(mut self, checksum: Option<Checksum>) -> Self {
        self.checksum = checksum.filter(|sum| {
            let ok = sum.is_well_formed();
            if !ok {
                tracing::warn!(
                    algorithm = sum.algorithm.name(),
                    hex = %sum.hex,
                    "vendor published a malformed checksum; installing unverified"
                );
            }
            ok
        });
        self
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum PackageArchive {
    Zip,
    TarGz,
}

impl PackageArchive {
    pub fn from_filename(name: &str) -> Self {
        if name.ends_with(".tar.gz") || name.ends_with(".tgz") {
            Self::TarGz
        } else {
            Self::Zip
        }
    }
}

pub fn java_executable_relative_path() -> PathBuf {
    #[cfg(target_os = "macos")]
    {
        PathBuf::from("Contents/Home/bin").join(oneclient_common::constants::JAVA_BIN)
    }
    #[cfg(not(target_os = "macos"))]
    {
        PathBuf::from("bin").join(oneclient_common::constants::JAVA_BIN)
    }
}