// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use crate::libdeno::deno_buf;

pub struct IsolateInitScript {
  pub source: String,
  pub filename: String,
}

pub struct IsolateInit {
  pub snapshot: Option<deno_buf>,
  pub init_script: Option<IsolateInitScript>,
}

pub fn deno_isolate_init() -> IsolateInit {
  if cfg!(not(feature = "check-only")) {
    if cfg!(feature = "use-snapshot-init") {
      let data =
        include_bytes!(concat!(env!("GN_OUT_DIR"), "/gen/snapshot_deno.bin"));

      unsafe {
        IsolateInit {
          snapshot: Some(deno_buf::from_raw_parts(data.as_ptr(), data.len())),
          init_script: None,
        }
      }
    } else {
      #[cfg(not(feature = "check-only"))]
      let source_bytes =
        include_bytes!(concat!(env!("GN_OUT_DIR"), "/gen/bundle/main.js"));

      #[cfg(feature = "check-only")]
      let source_bytes = vec![];

      IsolateInit {
        snapshot: None,
        init_script: Some(IsolateInitScript {
          filename: "gen/bundle/main.js".to_string(),
          source: std::str::from_utf8(source_bytes).unwrap().to_string(),
        }),
      }
    }
  } else {
    IsolateInit {
      snapshot: None,
      init_script: None,
    }
  }
}

pub fn compiler_isolate_init() -> IsolateInit {
  if cfg!(not(feature = "check-only")) {
    if cfg!(feature = "use-snapshot-init") {
      let data = include_bytes!(concat!(
        env!("GN_OUT_DIR"),
        "/gen/snapshot_compiler.bin"
      ));

      unsafe {
        IsolateInit {
          snapshot: Some(deno_buf::from_raw_parts(data.as_ptr(), data.len())),
          init_script: None,
        }
      }
    } else {
      #[cfg(not(feature = "check-only"))]
      let source_bytes =
        include_bytes!(concat!(env!("GN_OUT_DIR"), "/gen/bundle/compiler.js"));

      #[cfg(feature = "check-only")]
      let source_bytes = vec![];

      IsolateInit {
        snapshot: None,
        init_script: Some(IsolateInitScript {
          filename: "gen/bundle/compiler.js".to_string(),
          source: std::str::from_utf8(source_bytes).unwrap().to_string(),
        }),
      }
    }
  } else {
    IsolateInit {
      snapshot: None,
      init_script: None,
    }
  }
}