local syntax = require "core.syntax"

syntax.add {
  files = { "%.php$", "%.phtml" },
  headers = "^<%?php",
  comment = "//",
  patterns = {
    { pattern = "//.-\n",                 type = "comment"  },
    { pattern = "#.-\n",                  type = "comment"  },
    { pattern = { "/%*", "%*/" },         type = "comment"  },
    -- I dont know why the '//' are needed but I leave it here for now
    { pattern = { '"', '"', '\\' },       type = "string"   },
    { pattern = { "'", "'", '\\' },       type = "string"   },
    { pattern = "%\\x[%da-fA-F]+",        type = "number"   },
    { pattern = "-?%d+[%d%.eE]*",         type = "number"   },
    { pattern = "-?%.?%d+",               type = "number"   },
    { pattern = "[%.%+%-=/%*%^%%<>!~|&]", type = "operator" },
    { pattern = "[%a_][%w_]*%f[(]",       type = "function" },
    { pattern = "[%a_][%w_]*",            type = "symbol"   },
    -- To indicate variables.
    { pattern = "%$",          type = "operator" },
  },
  symbols = {
    ["return"] = "keyword",
    ["if"] = "keyword",
    ["else"] = "keyword",
    ["elseif"] = "keyword",
    ["endif"] = "keyword",
    ["declare"] = "keyword",
    ["enddeclare"] = "keyword",
    ["switch"] = "keyword",
    ["endswitch"] = "keyword",
    ["as"] = "keyword",
    ["do"] = "keyword",
    ["for"] = "keyword",
    ["endfor"] = "keyword",
    ["foreach"] = "keyword",
    ["endforeach"] = "keyword",
    ["while"] = "keyword",
    ["endwhile"] = "keyword",
    ["switch"] = "keyword",
    ["case"] = "keyword",
    ["continue"] = "keyword",
    ["default"] = "keyword",
    ["break"] = "keyword",
    ["exit"] = "keyword",
    ["goto"] = "keyword",

    ["catch"] = "keyword",
    ["throw"] = "keyword",
    ["try"] = "keyword",
    ["finally"] = "keyword",

    ["class"] = "keyword",
    ["trait"] = "keyword",
    ["interface"] = "keyword",
    ["public"] = "keyword",
    ["static"] = "keyword",
    ["protected"] = "keyword",
    ["private"] = "keyword",
    ["abstract"] = "keyword",
    ["final"] = "keyword",

    ["function"] = "keyword2",
    ["global"] = "keyword2",
    ["var"] = "keyword2",
    ["const"] = "keyword2",
    ["bool"] = "keyword2",
    ["boolean"] = "keyword2",
    ["int"] = "keyword2",
    ["integer"] = "keyword2",
    ["real"] = "keyword2",
    ["double"] = "keyword2",
    ["float"] = "keyword2",
    ["string"] = "keyword2",
    ["array"] = "keyword2",
    ["object"] = "keyword2",
    ["callable"] = "keyword2",
    ["iterable"] = "keyword2",

    ["namespace"] = "keyword2",
    ["extends"] = "keyword2",
    ["implements"] = "keyword2",
    ["instanceof"] = "keyword2",
    ["require"] = "keyword2",
    ["require_once"] = "keyword2",
    ["include"] = "keyword2",
    ["include_once"] = "keyword2",
    ["use"] = "keyword2",
    ["new"] = "keyword2",
    ["clone"] = "keyword2",

    ["true"] = "literal",
    ["false"] = "literal",
    ["NULL"] = "literal",
    ["parent"] = "literal",
    ["self"] = "literal",
  },
}