// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.

use std::path::PathBuf;
use std::sync::Arc;

use once_cell::sync::OnceCell;

use super::cache_db::CacheDB;
use super::cache_db::CacheDBConfiguration;
use super::check::TYPE_CHECK_CACHE_DB;
use super::deno_dir::DenoDirProvider;
use super::incremental::INCREMENTAL_CACHE_DB;
use super::node::NODE_ANALYSIS_CACHE_DB;
use super::parsed_source::PARSED_SOURCE_CACHE_DB;

pub struct Caches {
  dir_provider: Arc<DenoDirProvider>,
  fmt_incremental_cache_db: OnceCell<CacheDB>,
  lint_incremental_cache_db: OnceCell<CacheDB>,
  dep_analysis_db: OnceCell<CacheDB>,
  node_analysis_db: OnceCell<CacheDB>,
  type_checking_cache_db: OnceCell<CacheDB>,
}

impl Caches {
  pub fn new(dir: Arc<DenoDirProvider>) -> Self {
    Self {
      dir_provider: dir,
      fmt_incremental_cache_db: Default::default(),
      lint_incremental_cache_db: Default::default(),
      dep_analysis_db: Default::default(),
      node_analysis_db: Default::default(),
      type_checking_cache_db: Default::default(),
    }
  }

  fn make_db(
    cell: &OnceCell<CacheDB>,
    config: &'static CacheDBConfiguration,
    path: Option<PathBuf>,
  ) -> CacheDB {
    cell
      .get_or_init(|| {
        if let Some(path) = path {
          CacheDB::from_path(config, path, crate::version::deno())
        } else {
          CacheDB::in_memory(config, crate::version::deno())
        }
      })
      .clone()
  }

  pub fn fmt_incremental_cache_db(&self) -> CacheDB {
    Self::make_db(
      &self.fmt_incremental_cache_db,
      &INCREMENTAL_CACHE_DB,
      self
        .dir_provider
        .get_or_create()
        .ok()
        .map(|dir| dir.fmt_incremental_cache_db_file_path()),
    )
  }

  pub fn lint_incremental_cache_db(&self) -> CacheDB {
    Self::make_db(
      &self.lint_incremental_cache_db,
      &INCREMENTAL_CACHE_DB,
      self
        .dir_provider
        .get_or_create()
        .ok()
        .map(|dir| dir.lint_incremental_cache_db_file_path()),
    )
  }

  pub fn dep_analysis_db(&self) -> CacheDB {
    Self::make_db(
      &self.dep_analysis_db,
      &PARSED_SOURCE_CACHE_DB,
      self
        .dir_provider
        .get_or_create()
        .ok()
        .map(|dir| dir.dep_analysis_db_file_path()),
    )
  }

  pub fn node_analysis_db(&self) -> CacheDB {
    Self::make_db(
      &self.node_analysis_db,
      &NODE_ANALYSIS_CACHE_DB,
      self
        .dir_provider
        .get_or_create()
        .ok()
        .map(|dir| dir.node_analysis_db_file_path()),
    )
  }

  pub fn type_checking_cache_db(&self) -> CacheDB {
    Self::make_db(
      &self.type_checking_cache_db,
      &TYPE_CHECK_CACHE_DB,
      self
        .dir_provider
        .get_or_create()
        .ok()
        .map(|dir| dir.type_checking_cache_db_file_path()),
    )
  }
}