{ lib
, stdenv
, fetchurl
, patchelf
, glibc
}:

let
  version = "2.1.75";

  srcs = {
    aarch64-darwin = {
      url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/darwin-arm64/claude";
      sha256 = "8c541a5e924eda2070eaf1702a48047af671c4dff6a11a5e762076614a082675";
    };
    x86_64-darwin = {
      url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/darwin-x64/claude";
      sha256 = "82c90b91a0a18f60191f817b9b42304d8b17dbed75795b715c41f4fdfe4c782d";
    };
    x86_64-linux = {
      url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/linux-x64/claude";
      sha256 = "328b0a429c05a04f911157d886be5123cf1824a19ba8ca1f9d594c004eac32c9";
    };
    aarch64-linux = {
      url = "https://storage.googleapis.com/claude-code-dist-86c565f3-f756-42ad-8dfa-d59b1c096819/claude-code-releases/${version}/linux-arm64/claude";
      sha256 = "ec8f4f7f7bb50611dae70c109a76ee1da6a3ab45511c65f117df215848ecc905";
    };
  };

  src = srcs.${stdenv.hostPlatform.system} or (throw "Unsupported system: ${stdenv.hostPlatform.system}");

in stdenv.mkDerivation {
  pname = "claude-code";
  inherit version;

  src = fetchurl {
    inherit (src) url sha256;
  };

  dontUnpack = true;
  dontBuild = true;
  # Bun standalone binaries have JS code appended after the ELF sections
  # stripping/patching would remove or corrupt this appended data
  dontStrip = true;
  dontPatchELF = true;

  # Don't use autoPatchelfHook - it rewrites the ELF and strips the appended
  # bun bundle (the JS code is appended after the ELF sections)
  nativeBuildInputs = lib.optionals stdenv.isLinux [ patchelf ];

  installPhase = ''
    runHook preInstall

    install -Dm755 $src $out/bin/claude

    runHook postInstall
  '';

  # Manually patch the interpreter for bun standalone binaries
  # patchelf --set-interpreter modifies in-place without rewriting the entire ELF,
  # preserving the appended JS bundle that bun needs at runtime
  postFixup = lib.optionalString stdenv.isLinux ''
    interpreter="${glibc}/lib/${if stdenv.hostPlatform.system == "aarch64-linux" then "ld-linux-aarch64.so.1" else "ld-linux-x86-64.so.2"}"
    patchelf --set-interpreter "$interpreter" $out/bin/claude
  '';

  meta = with lib; {
    description = "Terminal-based AI coding assistant from Anthropic";
    homepage = "https://www.anthropic.com/claude-code";
    license = licenses.unfree;
    maintainers = [ ];
    platforms = [ "aarch64-darwin" "x86_64-darwin" "x86_64-linux" "aarch64-linux" ];
    mainProgram = "claude";
  };
}
