// Copyright 2019-2024 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

use super::SectionItem;
use super::{env_nodejs::manager_version, VersionMetadata};
use colored::Colorize;
use serde::Deserialize;
use std::path::PathBuf;

use crate::helpers::{cross_command, npm::PackageManager};

#[derive(Deserialize)]
struct YarnVersionInfo {
  data: Vec<String>,
}

pub fn npm_latest_version(pm: &PackageManager, name: &str) -> crate::Result<Option<String>> {
  match pm {
    PackageManager::Yarn => {
      let mut cmd = cross_command("yarn");

      let output = cmd
        .arg("info")
        .arg(name)
        .args(["version", "--json"])
        .output()?;
      if output.status.success() {
        let stdout = String::from_utf8_lossy(&output.stdout);
        let info: YarnVersionInfo = serde_json::from_str(&stdout)?;
        Ok(Some(info.data.last().unwrap().to_string()))
      } else {
        Ok(None)
      }
    }
    PackageManager::YarnBerry => {
      let mut cmd = cross_command("yarn");

      let output = cmd
        .arg("npm")
        .arg("info")
        .arg(name)
        .args(["--fields", "version", "--json"])
        .output()?;
      if output.status.success() {
        let info: crate::PackageJson =
          serde_json::from_reader(std::io::Cursor::new(output.stdout)).unwrap();
        Ok(info.version)
      } else {
        Ok(None)
      }
    }
    PackageManager::Npm => {
      let mut cmd = cross_command("npm");

      let output = cmd.arg("show").arg(name).arg("version").output()?;
      if output.status.success() {
        let stdout = String::from_utf8_lossy(&output.stdout);
        Ok(Some(stdout.replace('\n', "")))
      } else {
        Ok(None)
      }
    }
    PackageManager::Pnpm => {
      let mut cmd = cross_command("pnpm");

      let output = cmd.arg("info").arg(name).arg("version").output()?;
      if output.status.success() {
        let stdout = String::from_utf8_lossy(&output.stdout);
        Ok(Some(stdout.replace('\n', "")))
      } else {
        Ok(None)
      }
    }
    // Bun doesn't support `info` command
    PackageManager::Bun => {
      let mut cmd = cross_command("npm");

      let output = cmd.arg("show").arg(name).arg("version").output()?;
      if output.status.success() {
        let stdout = String::from_utf8_lossy(&output.stdout);
        Ok(Some(stdout.replace('\n', "")))
      } else {
        Ok(None)
      }
    }
  }
}

pub fn package_manager(app_dir: &PathBuf) -> PackageManager {
  let mut use_npm = false;
  let mut use_pnpm = false;
  let mut use_yarn = false;
  let mut use_bun = false;

  for entry in std::fs::read_dir(app_dir)
    .unwrap()
    .map(|e| e.unwrap().file_name().to_string_lossy().into_owned())
  {
    match entry.as_str() {
      "pnpm-lock.yaml" => use_pnpm = true,
      "package-lock.json" => use_npm = true,
      "yarn.lock" => use_yarn = true,
      "bun.lockb" => use_bun = true,
      _ => {}
    }
  }

  if !use_npm && !use_pnpm && !use_yarn && !use_bun {
    println!(
      "{}: no lock files found, defaulting to npm",
      "WARNING".yellow()
    );
    return PackageManager::Npm;
  }

  let mut found = Vec::new();

  if use_npm {
    found.push(PackageManager::Npm);
  }
  if use_pnpm {
    found.push(PackageManager::Pnpm);
  }
  if use_yarn {
    found.push(PackageManager::Yarn);
  }
  if use_bun {
    found.push(PackageManager::Bun);
  }

  if found.len() > 1 {
    let pkg_manger = found[0];
    println!(
          "{}: Only one package manager should be used, but found {}.\n         Please remove unused package manager lock files, will use {} for now!",
          "WARNING".yellow(),
          found.iter().map(ToString::to_string).collect::<Vec<_>>().join(" and "),
          pkg_manger
        );
    return pkg_manger;
  }

  if use_npm {
    PackageManager::Npm
  } else if use_pnpm {
    PackageManager::Pnpm
  } else if use_bun {
    PackageManager::Bun
  } else if manager_version("yarn")
    .map(|v| v.chars().next().map(|c| c > '1').unwrap_or_default())
    .unwrap_or(false)
  {
    PackageManager::YarnBerry
  } else {
    PackageManager::Yarn
  }
}

pub fn items(
  app_dir: Option<&PathBuf>,
  package_manager: PackageManager,
  metadata: &VersionMetadata,
) -> Vec<SectionItem> {
  let mut items = Vec::new();
  if let Some(app_dir) = app_dir {
    for (package, version) in [
      ("@tauri-apps/api", None),
      ("@tauri-apps/cli", Some(metadata.js_cli.version.clone())),
    ] {
      let app_dir = app_dir.clone();
      let item = nodejs_section_item(package.into(), version, app_dir, package_manager);
      items.push(item);
    }
  }

  items
}

pub fn nodejs_section_item(
  package: String,
  version: Option<String>,
  app_dir: PathBuf,
  package_manager: PackageManager,
) -> SectionItem {
  SectionItem::new().action(move || {
    let version = version.clone().unwrap_or_else(|| {
      package_manager
        .current_package_version(&package, &app_dir)
        .unwrap_or_default()
        .unwrap_or_default()
    });

    let latest_ver = super::packages_nodejs::npm_latest_version(&package_manager, &package)
      .unwrap_or_default()
      .unwrap_or_default();

    if version.is_empty() {
      format!("{} {}: not installed!", package, "".green())
    } else {
      format!(
        "{} {}: {}{}",
        package,
        "".dimmed(),
        version,
        if !(version.is_empty() || latest_ver.is_empty()) {
          let version = semver::Version::parse(version.as_str()).unwrap();
          let target_version = semver::Version::parse(latest_ver.as_str()).unwrap();

          if version < target_version {
            format!(" ({}, latest: {})", "outdated".yellow(), latest_ver.green())
          } else {
            "".into()
          }
        } else {
          "".into()
        }
      )
    }
    .into()
  })
}