#!/usr/bin/env texlua
-----------------------------------------------------------------------
--         FILE:  mktests
--        USAGE:  ./mktests 
--  DESCRIPTION:  test the behavior of Luaotfload
-- REQUIREMENTS:  Luatex > 0.76, Luaotfload
--       AUTHOR:  Philipp Gesang (Phg), <phg42.2a@gmail.com>
-----------------------------------------------------------------------
--
--===================================================================--
--                               NOTE
--             this is a stub, to be completed long-term
--                        suggestions welcome
--===================================================================--


local tests       = { }
local lpeg        = require "lpeg"
local lpegmatch   = lpeg.match

config            = { luaotfload = { } }
luatexbase        = { }

kpse.set_program_name "luatex"

require "lualibs"
require "luaotfload-basics-gen.lua"
require "luaotfload-log.lua"

fonts = { names = { } } -- for db; normally provided by the fontloaders

local require_init = { }

local loadmodule = function (name)
    local v = require ("luaotfload-" .. name)
    if v then
        local mod = { }
        local tv  = type (v)
        if tv == "table" then
            mod.name = name
            mod.init = v.init
            require_init [#require_init + 1] = mod
        elseif tv == "function" then
            mod.name = name
            mod.init = v
            require_init [#require_init + 1] = mod
        end
    end
end

require "alt_getopt"

loadmodule "log.lua"       --- this populates the luaotfload.log.* namespace
loadmodule "parsers"       --- fonts.conf, configuration, and request syntax
loadmodule "configuration" --- configuration file handling
loadmodule "database"
loadmodule "resolvers"     --- Font lookup

do --- init_modules
    --- NB we don’t command the logger at this point.
    local todo = #require_init
    local ret  = true
    for i = 1, todo do
        local mod  = require_init[i]
        local name = mod.name
        local init = mod.init
        if type (init) ~= "function" then
            error ("luaotfload broken; module "
                   .. name .. " missing initializers!")
        end
        local v = mod.init ()
        if v == true then
            --- evaluated well
        elseif type (v) == "table" then
            luaotfload[name] = v
        else
            error ("luaotfload broken; initialization of module "
                   .. name .. " returned " .. tostring (v) .. ".")
            return false
        end
    end
end

local names = fonts.names

-----------------------------------------------------------------------
--- helper functions
-----------------------------------------------------------------------

local pprint_resolve = function (input, output, result)
  texio.write_nl (string.format ("[%s] “%s” -> “%s”",
                                 result == true and "passed" or "failed",
                                 input,
                                 output))
end

local pprint_result = function (name, failed, total)
  if failed == 0 then
    texio.write_nl (string.format ("[%s] all %d passed", name, total))
  else
    texio.write_nl (string.format ("[%s] %d of %d failed",
                                   name,
                                   failed,
                                   total))
  end
end

local pprint_spec = function (spec)
  return string.format ("%s/%s*%.2fpt",
                        spec.specification,
                        spec.style or "regular",
                        spec.optsize or 0)
end

-----------------------------------------------------------------------
--- parser tests
-----------------------------------------------------------------------

local test_config_input = [==[


[foo]
bar = baz
xyzzy = no
buzz

[lavernica "brutalitops"]
# It’s a locomotive that runs on us.
  laan-ev = zip zop zooey   ; jib-jab
Crouton = "Fibrosis \"\\ # "

]==]

local test_config_output = {
  { section = { title = "foo" },
    variables = { bar = "baz",
                  xyzzy = false,
                  buzz = true } },
  { section = { title = "lavernica",
                subtitle = "brutalitops" },
    variables = { ["laan-ev"] = "zip zop zooey",
                  crouton = "Fibrosis \"\\ # " } }
}

local parse_config = function ()
  local parser = luaotfload.parsers.config
  local result = lpegmatch (parser, test_config_input)
  --- compare values recursively
  local aux aux = function (t1, t2)
    --- cheaply non-tail recursive
    local k1 = table.keys (t1)
    local k2 = table.keys (t2)
    if #k1 ~= #k2 then
      return false
    end
    for i = 1, #k1 do
      local k  = k1[i]
      local v1 = t1[k]
      local v2 = t2[k]
      if type (v1) == "table" then
        if type (v2) ~= "table" or not aux (v1, v2) then
          return false
        end
      elseif v1 ~= v2 then
        return false
      end
    end
    return true
  end
  return aux (result, test_config_output) and 0 or 1, 1
end

tests["parse_config"] = parse_config

-----------------------------------------------------------------------
--- font tests
-----------------------------------------------------------------------

--- test sets

local infer_regular_style = {
  --- inferring which one is the correct style for “regular”; can be
  --- obscured by synonyms like “book” etc.
  { "Iwona",                "Iwona-Regular.otf"         }, -- trivial case
  { "DejaVu Serif",         "DejaVuSerif.ttf"           },
  { "DejaVu Sans",          "DejaVuSans.ttf"            },
  { "Adobe Garamond Pro",   "agaramondpro_regular.otf"  },
  { "Garamond Premier Pro", "GaramondPremrPro.otf"      },
  { "CMU Serif",            "cmunrm.otf"                },
  { "CMU Sans Serif",       "cmunss.otf"                },
  { "Minion Pro",           "MinionPro-Regular.otf"     },
  --- Below test will succeed only if we match for the
  --- splainname (= sanitized tfmdata.fullname) field
  --- explicitly.
  { "Minion Pro Italic",    "MinionPro-It.otf"          },
}

local choose_optical_size = {
  { { name = "Latin Modern Roman", optsize =  1 }, "lmroman5-regular.otf"        },
  { { name = "Latin Modern Roman", optsize = 10 }, "lmroman10-regular.otf"       },
  { { name = "Latin Modern Roman", optsize = 12 }, "lmroman12-regular.otf"       },
  { { name = "Latin Modern Roman", optsize = 42 }, "lmroman17-regular.otf"       },
  { { name = "EB Garamond", optsize =  1 }, "EBGaramond08-Regular.otf"           },
  { { name = "EB Garamond", optsize =  8 }, "EBGaramond08-Regular.otf"           },
  { { name = "EB Garamond", optsize = 12 }, "EBGaramond12-Regular.otf"           },
  { { name = "EB Garamond", optsize = 42 }, "EBGaramond12-Regular.otf"           },
  { { name = "Garamond Premier Pro", optsize =  1 }, "GaramondPremrPro-Capt.otf" },
  { { name = "Garamond Premier Pro", optsize = 10 }, "GaramondPremrPro.otf"      },
  { { name = "Garamond Premier Pro", optsize = 15 }, "GaramondPremrPro-Subh.otf" },
  { { name = "Garamond Premier Pro", optsize = 42 }, "GaramondPremrPro-Disp.otf" },
}

local choose_style = {
  { { name = "DejaVu Sans", style = "regular"    }, "DejaVuSans.ttf"                       },
  { { name = "DejaVu Sans", style = "italic"     }, "DejaVuSans-Oblique.ttf"               },
  { { name = "DejaVu Sans", style = "bold"       }, "DejaVuSans-Bold.ttf"                  },
  { { name = "DejaVu Sans", style = "bolditalic" }, "DejaVuSans-BoldOblique.ttf"           },
  { { name = "Linux Libertine O", style = "regular"    }, "LinLibertine_R.otf"             },
  { { name = "Linux Libertine O", style = "italic"     }, "LinLibertine_RI.otf"            },
  { { name = "Linux Libertine O", style = "bold"       }, "LinLibertine_RB.otf"            },
  { { name = "Linux Libertine O", style = "bolditalic" }, "LinLibertine_RBI.otf"           },
  { { name = "Liberation Serif", style = "regular"    }, "LiberationSerif-Regular.ttf"     },
  { { name = "Liberation Serif", style = "italic"     }, "LiberationSerif-Italic.ttf"      },
  { { name = "Liberation Serif", style = "bold"       }, "LiberationSerif-Bold.ttf"        },
  { { name = "Liberation Serif", style = "bolditalic" }, "LiberationSerif-BoldItalic.ttf"  },
  { { name = "CMU Sans Serif", style = "regular"    }, "cmunss.otf"   }, -- no “regular” but “medium”
  { { name = "CMU Sans Serif", style = "italic"     }, "cmunsi.otf"   }, -- no “italic” but “oblique”
  { { name = "CMU Sans Serif", style = "bold"       }, "cmunsx.otf"   },
  { { name = "CMU Sans Serif", style = "bolditalic" }, "cmunso.otf"   },
  --[[--
    Minion Pro Italic is exceptionally weird regarding identifiers in
    that the postscript fontname and both info.fontname and
    info.fullname are given as “minionproit”. Now its english fullname
    (field 18) is “minionproital”. Only the value “fullname” in the root of
    the tfmdata structure (not the one returned by fontloader.info()!)
    accurately yields “Minion Pro Italic”.

    To complete the picture, the file naming isn’t very consistent either:
    we find the suffixes “Regular” and “Bold”, but “It” and “BoldIt”. What
    the hell were the designers smoking?

    Also, the full Minion Pro set comes with different optical sizes which
    for monetary reasons cannot considered here.
  --]]--
  { { name = "Minion Pro", style = "regular"    }, "MinionPro-Regular.otf"  },
  { { name = "Minion Pro", style = "italic"     }, "MinionPro-It.otf"       },
  { { name = "Minion Pro", style = "bold"       }, "MinionPro-Bold.otf"     },
  { { name = "Minion Pro", style = "bolditalic" }, "MinionPro-BoldIt.otf"   },
}

--- this needs a database built with --formats=+pfa,pfb,afm

local resolve_t1_font = {
  { { name = "URW Gothic L",          style = "regular"    }, "a010013l.pfb"  }, --> “book”
--  { { name = "URW Gothic L",          style = "italic"     }, "a010033l.pfb"  }, --> “book oblique”
--  { { name = "URW Gothic L",          style = "bold"       }, "a010015l.pfb"  }, --> “demi”
--  { { name = "URW Gothic L",          style = "bolditalic" }, "a010035l.pfb"  }, --> “demi oblique”
  { { name = "Century Schoolbook L",  style = "regular"    }, "c059013l.pfb"  },
  { { name = "Century Schoolbook L",  style = "italic"     }, "c059033l.pfb"  },
  { { name = "Century Schoolbook L",  style = "bold"       }, "c059016l.pfb"  },
  { { name = "Century Schoolbook L",  style = "bolditalic" }, "c059036l.pfb"  },
  { { name = "Nimbus Roman No9 L",    style = "regular"    }, "n021003l.pfb"  },
  { { name = "Nimbus Roman No9 L",    style = "italic"     }, "n021023l.pfb"  },
  { { name = "Nimbus Roman No9 L",    style = "bold"       }, "n021004l.pfb"  }, --- medium, actually
  { { name = "Nimbus Roman No9 L",    style = "bolditalic" }, "n021024l.pfb"  },
}

local translate_style = {
  regular     = "r",
  italic      = "i",
  bold        = "b",
  bolditalic  = "bi",
}

local font_name_tests = {
  infer_regular_style,
  choose_optical_size,
  choose_style,
  resolve_t1_font,
}

local default_spec = {
  name          = false,
  lookup        = "name",
  specification = false,
  optsize       = 0,
}

local resolve_font_name = function ()
  local failed, total = 0, 0
  for nset = 1, #font_name_tests do
    local set = font_name_tests[nset]

    for ntest = 1, #set do
      local test = set[ntest]
      local input, output = test[1], test[2]

      if type (input) == "string" then
        local input_spec = table.copy (default_spec)
        input_spec.name = input
        input_spec.specification = input_spec.lookup .. ":" .. input
        local result = fonts.names.lookup_font_name (input_spec) == output
        total = total + 1
        if not result then
          failed = failed + 1
        end
        pprint_resolve (input, output, result)

      else
        local input_spec, output = test[1], test[2]
        input_spec.specification = (input_spec.lookup
                                    or default_spec.lookup)
                                .. ":" .. input_spec.name
        input_spec.optsize = input_spec.optsize or default_spec.optsize
        input_spec.style   = translate_style [input_spec.style]
        local result = fonts.names.lookup_font_name (input_spec) == output
        total = total + 1
        if not result then
          failed = failed + 1
        end
        pprint_resolve (pprint_spec (input_spec), output, result)
      end

    end
  end
  return failed, total
end

tests ["resolve_font_name"] = resolve_font_name


-----------------------------------------------------------------------
--- runner
-----------------------------------------------------------------------

local main = function ()
  local failed, total = 0, 0
  config.actions.apply_defaults ()
  for name, test in next, tests do
    texio.write_nl ("[" .. name .. "]")
    local newfailed, newtotal = test ()
    total  = total + 1
    pprint_result (name, newfailed, newtotal)
    failed = failed + newfailed
    total  = total  + newtotal
  end

  if failed == 0 then
    texio.write_nl (string.format ("[report] all %d tests passed.", total))
  else
    texio.write_nl (string.format ("[report] %d of %d tests failed (%d %%).",
                                   failed,
                                   total,
                                   failed / total * 100))
  end
  texio.write_nl ""
  os.exit (0)
end

return main ()

--- vim:ft=lua:ts=2:et:sw=2