#!/bin/bash

set -e

source bin/require_ruby

# Find errors in `tree-sitter parse` output and print them in a format easily consumable
# by VSCode. The Hacklang parser already has an error format easily consumable by VSCode
# so we match that format.
#
#     $ bin/ts-error $@
#     examples/hack-sql-fake/src/QueryContext.php
#     (5,1)-(5,8) ERROR
#     (10,3)-(10,6) MISING
#     examples/hack-sql-fake/src/SQLCommandProcessor.php
#     (2,3)-(2,4) ERROR
#

bin/generate-parser

# Filter down to files with errors.
npx tree-sitter parse --quiet $@ |
  cut -f1 |

  # Get full errors for failing files.
  xargs -r npx tree-sitter parse |

  # Format errors and print file paths first followed by errors.
  ruby -e "
    errors = []

    ARGF.each_line do |line|
      # (ERROR [101, 0] - [101, 14]
      # file.hack    0 ms    (MISSING \";\" [229, 19] - [229, 19])
      next if line !~ /\((ERROR|MISSING)( .*)? \[(\d+), (\d+)\] - \[(\d+), (\d+)\]/

      errors << [
        \$1, # type
        \$2, # message
        \$3.to_i, # line
        \$4.to_i, # column
        \$5.to_i, # endLine
        \$6.to_i, # endColumn
      ]

      # Tree-sitter includes the file path at the end of the parser output.
      next if line !~ /(^.*\.(php|hack))\s/

      puts \$1

      source = File.read(\$1).split(\"\n\") << [''] # In case of trailing newline.

      errors.uniq.each do |type, message, line, column, endLine, endColumn|
        # Use source code as the error message for now.
        if message.nil?
          if line == endLine
            message = source[line][column..endColumn]
          else
            message = [
              source[line][column..],
              *source[line + 1...endLine],
              source[endLine][..endColumn]
            ].join('\n')[0..90]
          end
        else
          message = \"#{type} #{message&.strip}\".strip
        end

        # Increment numbers to match VSCode's 1-indexing. Use Hack error format.
        puts \"(#{line + 1},#{column + 1})-(#{endLine + 1},#{endColumn + 1}) #{message}\"
      end

      errors = []
    end
"