# typed: strict
# frozen_string_literal: true

require "spoom/sorbet/config"
require "spoom/sorbet/errors"
require "spoom/sorbet/lsp"
require "spoom/sorbet/metrics"
require "spoom/sorbet/sigils"

require "open3"

module Spoom
  module Sorbet
    CONFIG_PATH = "sorbet/config"
    GEM_PATH = T.let(Gem::Specification.find_by_name("sorbet-static").full_gem_path, String)
    BIN_PATH = T.let((Pathname.new(GEM_PATH) / "libexec" / "sorbet").to_s, String)

    SEGFAULT_CODE = 139

    class << self
      extend T::Sig

      sig do
        params(
          arg: String,
          path: String,
          capture_err: T::Boolean,
          sorbet_bin: T.nilable(String)
        ).returns(ExecResult)
      end
      def srb(*arg, path: ".", capture_err: false, sorbet_bin: nil)
        if sorbet_bin
          arg.prepend(sorbet_bin)
        else
          arg.prepend("bundle", "exec", "srb")
        end
        Spoom.exec(*T.unsafe(arg), path: path, capture_err: capture_err)
      end

      sig do
        params(
          arg: String,
          path: String,
          capture_err: T::Boolean,
          sorbet_bin: T.nilable(String)
        ).returns(ExecResult)
      end
      def srb_tc(*arg, path: ".", capture_err: false, sorbet_bin: nil)
        arg.prepend("tc") unless sorbet_bin
        srb(*T.unsafe(arg), path: path, capture_err: capture_err, sorbet_bin: sorbet_bin)
      end

      # List all files typechecked by Sorbet from its `config`
      sig { params(config: Config, path: String).returns(T::Array[String]) }
      def srb_files(config, path: ".")
        regs = config.ignore.map { |string| Regexp.new(Regexp.escape(string)) }
        exts = config.allowed_extensions.empty? ? [".rb", ".rbi"] : config.allowed_extensions
        Dir.glob((Pathname.new(path) / "**/*{#{exts.join(",")}}").to_s).reject do |f|
          regs.any? { |re| re.match?(f) }
        end.sort
      end

      sig do
        params(
          arg: String,
          path: String,
          capture_err: T::Boolean,
          sorbet_bin: T.nilable(String)
        ).returns(T.nilable(String))
      end
      def srb_version(*arg, path: ".", capture_err: false, sorbet_bin: nil)
        result = T.let(T.unsafe(self).srb_tc(
          "--no-config",
          "--version",
          *arg,
          path: path,
          capture_err: capture_err,
          sorbet_bin: sorbet_bin
        ), ExecResult)
        return nil unless result.status

        result.out.split(" ")[2]
      end

      sig do
        params(
          arg: String,
          path: String,
          capture_err: T::Boolean,
          sorbet_bin: T.nilable(String)
        ).returns(T.nilable(T::Hash[String, Integer]))
      end
      def srb_metrics(*arg, path: ".", capture_err: false, sorbet_bin: nil)
        metrics_file = "metrics.tmp"
        metrics_path = "#{path}/#{metrics_file}"
        T.unsafe(self).srb_tc(
          "--metrics-file",
          metrics_file,
          *arg,
          path: path,
          capture_err: capture_err,
          sorbet_bin: sorbet_bin
        )
        if File.exist?(metrics_path)
          metrics = Spoom::Sorbet::MetricsParser.parse_file(metrics_path)
          File.delete(metrics_path)
          return metrics
        end
        nil
      end

      # Get `gem` version from the `Gemfile.lock` content
      #
      # Returns `nil` if `gem` cannot be found in the Gemfile.
      sig { params(gem: String, path: String).returns(T.nilable(String)) }
      def version_from_gemfile_lock(gem: "sorbet", path: ".")
        gemfile_path = "#{path}/Gemfile.lock"
        return nil unless File.exist?(gemfile_path)

        content = File.read(gemfile_path).match(/^    #{gem} \(.*(\d+\.\d+\.\d+).*\)/)
        return nil unless content

        content[1]
      end
    end
  end
end