local info = {
    version   = 1.002,
    comment   = "file handler for textadept for context/metafun",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files",
}

local lexer   = require("scite-context-lexer")
local context = lexer.context

local char, format, gsub = string.char, string.format, string.gsub

-- What is _CHARSET doing ... I don't want any messing with conversion at all. Scite is
-- more clever with e.g. pdf. How can I show non ascii as escapes.

-- I'll add a few more keybindings. I mostly made this file for my own use and as a
-- fallback for SciTE as it runs on all os's. It might evolve ... who knows.

io.encodings = {
    "UTF-8",
    "ASCII",
    "UTF-16",
}

-- We need this for for instance pdf files (faster too):

local sevenbitascii   = { }
for i=127,255 do
    sevenbitascii[char(i)] = format("0x%02X",i)
end

local function setsevenbitascii(buffer)
    -- we cannot directly assign sevenbitascii to buffer
    local representation = buffer.representation
    for k, v in next, sevenbitascii do
        representation[k] = v
    end
end

-- Here we rebind keys. For this we need to load the alternative runner framework. I will
-- probably change the menu.

local oldrunner = textadept.run
local runner    = require("textadept-context-runner")

-- local function userunner(runner)
--     --
--     keys [OSX and 'mr' or                  'cr'  ] = runner.process or runner.run
--     keys [OSX and 'mR' or (GUI and 'cR' or 'cmr')] = runner.check   or runner.compile
--     keys [OSX and 'mB' or (GUI and 'cB' or 'cmb')] = runner.preview or runner.build
--     keys [OSX and 'mX' or (GUI and 'cX' or 'cmx')] = runner.quit    or runner.stop
--     --
--     textadept.menu.menubar [_L['_Tools']] [_L['_Run']]     [2] = runner.process or runner.run
--     textadept.menu.menubar [_L['_Tools']] [_L['_Compile']] [2] = runner.check   or runner.compile
--     textadept.menu.menubar [_L['_Tools']] [_L['Buil_d']]   [2] = runner.preview or runner.build
--     textadept.menu.menubar [_L['_Tools']] [_L['S_top']]    [2] = runner.quit    or runner.stop
--     --
-- end

-- I played a while with supporting both systems alongsize but getting the menus
-- synchronized is a real pain and semi-random. So, I decided to just drop the
-- old. And I don't want to implement a full variant now. Anyway, after that
-- conclusion I decided to replace not only the tools menu.

local SEPARATOR = { "" }
local newmenu   = { }
local newkeys   = { }

do

    newmenu.file = {

        title = "_File",

        { "_New",          buffer.new },
        { "_Open",         io.open_file },
        { "Open _Recent",  io.open_recent_file },
        { "Re_load",       io.reload_file },
        { "_Save",         io.save_file },
        { "Save _As",      io.save_file_as },
        { "Save All",      io.save_all_files },

        SEPARATOR,

        { "_Close",        io.close_buffer },
        { "Close All",     io.close_all_buffers },

     -- SEPARATOR,

     -- { "Loa_d Session", textadept.session.load },
     -- { "Sav_e Session", textadept.session.save },

        SEPARATOR,

        { _L["_Quit"],     quit },

    }

    -- maybe just the same keys on all ... or duplicate on osx

    newkeys[OSX and "mn"  or "cn"]  = buffer.new
    newkeys[OSX and "mo"  or "co"]  = io.open_file
    newkeys[OSX and "cmo" or "cao"] = io.open_recent_file
    newkeys[OSX and "ms"  or "cs"]  = io.save_file
    newkeys[OSX and "mS"  or "cS"]  = io.save_file_as
    newkeys[OSX and "mw"  or "cw"]  = io.close_buffer
    newkeys[OSX and "mW"  or "cW"]  = io.close_all_buffers

end

do

    local function complete_symbol()
        textadept.editing.autocomplete(buffer:get_lexer(true))
    end

    newmenu.edit = {

        title = "_Edit",

        SEPARATOR,

        { "_Undo",                 buffer.undo },
        { "_Redo",                 buffer.redo },

        SEPARATOR,

        { "Cu_t",                  buffer.cut },
        { "_Copy",                 buffer.copy },
        { "_Paste",                buffer.paste },
        { "_Delete",               buffer.clear },
        { "Select _All",           buffer.select_all },

        SEPARATOR,

        { "Duplicate _Line",       buffer.line_duplicate },

        SEPARATOR,

        { "Toggle _Block Comment", runner.blockcomment },
        { "_Upper Case Selection", buffer.upper_case },
        { "_Lower Case Selection", buffer.lower_case },

    }

    newkeys[OSX and "mz" or "cz"]  = buffer.undo
    newkeys[OSX and "my" or "cy"]  = buffer.redo
    newkeys[OSX and "mx" or "cx"]  = buffer.cut
    newkeys[OSX and "mc" or "cc"]  = buffer.copy
    newkeys[OSX and "mv" or "cv"]  = buffer.paste
    newkeys[OSX and "ma" or "ca"]  = buffer.select_all

    newkeys[OSX and "mD" or "cD"]  = textadept.editing.select_word
    newkeys[OSX and "mN" or "cN"]  = textadept.editing.select_line
    newkeys[OSX and "mP" or "cP"]  = textadept.editing.select_paragraph

    newkeys["del"]                 = buffer.clear
    newkeys["cy"]                  = buffer.redo

    newkeys[OSX and "md" or "cd"]  = buffer.line_duplicate
    newkeys[OSX and "cu" or "cau"] = buffer.upper_case
    newkeys[OSX and "cU" or "caU"] = buffer.lower_case

    newkeys[OSX and "mq" or "cq"]  = runner.blockcomment

    newkeys[OSX and "ml" or "cl"]  = buffer.line_delete

    -- Do I ever use these?

 -- newkeys["cf"]     = buffer.char_right
 -- newkeys["cF"]     = buffer.char_right_extend
 -- newkeys["cmf"]    = buffer.word_right
 -- newkeys["cmF"]    = buffer.word_right_extend
 -- newkeys["cb"]     = buffer.char_left
 -- newkeys["cB"]     = buffer.char_left_extend
 -- newkeys["cmb"]    = buffer.word_left
 -- newkeys["cmB"]    = buffer.word_left_extend
 -- newkeys["cn"]     = buffer.line_down
 -- newkeys["cN"]     = buffer.line_down_extend
 -- newkeys["cp"]     = buffer.line_up
 -- newkeys["cP"]     = buffer.line_up_extend
 -- newkeys["ca"]     = buffer.vc_home
 -- newkeys["cA"]     = buffer.vc_home_extend
 -- newkeys["ce"]     = buffer.line_end
 -- newkeys["cE"]     = buffer.line_end_extend
 -- newkeys["aright"] = buffer.word_right
 -- newkeys["aleft"]  = buffer.word_left
 -- newkeys["cdv"]    = buffer.clear
 -- newkeys["ck"]     = function() buffer:line_end_extend() buffer:cut()  end
 -- newkeys["cl"]     = buffer.vertical_centre_caret

    newkeys.fn = OSX and function() return true end or nil

    newkeys[OSX and "c@" or "c "] = complete_symbol

end

do

    local function find_in_file()
        ui.find.in_files = false
        ui.find.focus()
    end

    local function find_in_files()
        ui.find.in_files = true
        ui.find.focus()
    end

    local function find_next_in_files()
        ui.find.goto_file_found(false,true)
    end

    local function find_previous_in_files()
        ui.find.goto_file_found(false,false)
    end

    newmenu.search = {

        title = "_Search",

        SEPARATOR,

        { "_Find",                     find_in_file },
        { "Find _Next",                ui.find.find_next },
        { "Find _Previous",            ui.find.find_prev },
        { "_Replace",                  ui.find.replace },
        { "Replace _All",              ui.find.replace_all },
        { "Find _Incremental",         ui.find.find_incremental },

        SEPARATOR,

        { "Find in Fi_les",            find_in_files },
        { "Goto Nex_t File Found",     find_next_in_files },
        { "Goto Previou_s File Found", find_previous_in_files },

        SEPARATOR,

        { "_Jump to",                  textadept.editing.goto_line }

    }

    -- The few times I use osx I want the same keys ... better explicitly handle
    -- "not GUI" but I have to test the curses version first anyway.

    newkeys[OSX and "mf" or "cf"]    = find_in_file
    newkeys[OSX and "mg" or "cg"]    = ui.find.find_next
    newkeys[OSX and "mG" or "cG"]    = ui.find.find_prev
    newkeys[OSX and "mg" or "cg"]    = textadept.editing.goto_line

    newkeys["f3"]                    = not OSX and ui.find.find_next or nil
    newkeys["sf3"]                   = not OSX and ui.find.find_prev or nil

    newkeys[OSX and "cr"  or "car"]  = ui.find.replace
    newkeys[OSX and "cR"  or "caR"]  = ui.find.replace_all
    newkeys[OSX and "cmf" or "caf"]  = ui.find.find_incremental

    newkeys[OSX and "mF"  or "cF"]   = find_in_files
    newkeys[OSX and "cmg" or "cag"]  = find_next_in_files
    newkeys[OSX and "cmG" or "caG"]  = find_previous_in_files

end

do

    io.quick_open_max = 5000

    local function isdir(path)
        return path and path ~= "" and lfs.attributes(path,"mode") == "directory"
    end

    local function resolveroot(path)
        local path = runner.resultof("mtxrun --resolve-path TEXMFCONTEXT")
        if path then
            return string.match(path,"(.-)%s$")
        end
    end

    local function opencurrentdirectory()
        local path = buffer.filename
        if path and path ~= "" then
            path = string.match(path,"^(.+)[/\\]")
            if isdir(path) then
                io.quick_open(path)
            end
        end
    end

    local function openuserdirectory()
        local path = resolveroot("TEXMFPROJECT")
        if isdir(path) then
            io.quick_open(path .. "/tex/context/user")
        end
    end

    local function openbasedirectory()
        local path = resolveroot("TEXMFCONTEXT")
        if isdir(path) then
            io.quick_open(path .. "/tex/context/base/mkiv")
        end
    end

    local started = false

    local function startservice()
        if WIN32 then
            os.execute([[cmd /c start /min "Context Documentation" mtxrun --script server --auto]])
        else
            os.execute([[mtxrun --script server --start > ~/context-wwwserver.log &]])
        end
        started = true
    end

    local function showcommand()
     -- if not started then
     --     startservice()
     -- end
        local start = buffer.selection_n_start[0]
        local stop  = buffer.selection_n_end[0]
        if start == stop then
            buffer:set_target_range(buffer:word_start_position(start,true),buffer:word_end_position(stop,true))
        else
            buffer:set_target_range(start,stop)
        end
        local word = buffer.target_text
        os.execute(format([[mtxrun --gethelp --url="http://localhost:8088/mtx-server-ctx-help.lua?command=%s"]],word or ""))
    end

    newmenu.tools = {

        title = "_Tools",

        SEPARATOR,

        { "Check Source",            runner.check },
        { "Process Source",          runner.process },
        { "Preview Result",          runner.preview },
        { "Show Log File",           runner.install("logfile") },
        { "Quit",                    runner.quit },

        SEPARATOR,

        { "Open Current Directory",  opencurrentdirectory },
        { "Open User Directory",     openuserdirectory },
        { "Open Base Directory",     openbasedirectory },

        SEPARATOR,

        { "Purge Files",             runner.install("purge") },
        { "Clear Cache",             runner.install("clear") },
        { "Generate File Database",  runner.install("generate") },
        { "Generate Font Database",  runner.install("fonts") },

        SEPARATOR,

        { "Typeset Listing",         runner.install("listing") },
        { "Process and Arrange",     runner.install("arrange") },

        SEPARATOR,

        { "Start Document Service",  startservice },
        { "Goto Document Service",   showcommand },

        SEPARATOR,

        { "Show Unicodes",           runner.unicodes },

        -- We need this bogus entry because otherwise we get a message due to macros.lua. I 
        -- might need to come up with some proper placeholder. Well, let's for now just 
        -- live with the crash. 

     -- SEPARATOR,
     --
     -- { "Select Co_mmand",         textadept.editing.goto_line },
    
}

 -- newkeys[OSX and "mc" or "cc"] = runner.check
    newkeys[OSX and "mr" or "cr"] = runner.process
    newkeys[OSX and "mp" or "cp"] = runner.preview
 -- newkeys[OSX and "mx" or "cx"] = runner.quit -- makes no sense

    newkeys["f7"]  = runner.process
    newkeys["f12"] = runner.process

    newkeys["f2"]  = runner.unicodes

end

do

    local function use_tabs()
        buffer.use_tabs = not buffer.use_tabs
        events.emit(events.UPDATE_UI) -- for updating statusbar
    end

    local function set_eol_mode_crlf()
        set_eol_mode(buffer.EOL_CRLF)
    end

    local function set_eol_mode_lf()
        set_eol_mode(buffer.EOL_LF)
    end

    local function show_eol()
        buffer.view_eol = not buffer.view_eol
    end

    local function wrap_mode()
        buffer.wrap_mode = buffer.wrap_mode == 0 and buffer.WRAP_WHITESPACE or 0
    end

    function show_white_space()
        buffer.view_ws = buffer.view_ws == 0 and buffer.WS_VISIBLEALWAYS or 0
    end

    local function update_lexing()
        buffer:colourise(0,-1)
    end

    function set_endoding_utf8()
        set_encoding("UTF-8")
    end

    function set_encoding_ascii()
        set_encoding("ASCII")
    end

    function set_endoding_utf16le()
        set_encoding("UTF-16LE")
    end

    function set_endoding_utf16Be()
        set_encoding("UTF-16BE")
    end

    function goto_prev_buffer()
        view:goto_buffer(-1)
    end

    function goto_next_buffer()
        view:goto_buffer(1)
    end

    newmenu.buffer = {

        title = "_Buffer",

        SEPARATOR,

        { "_Previous Buffer",  goto_prev_buffer },
        { "_Next Buffer",      goto_next_buffer },
        { "_Switch to Buffer", ui.switch_buffer },

        SEPARATOR,

        { "_Toggle Use Tabs", use_tabs },
        {
            title = "EOL Mode",

            { "_CRLF", set_eol_mode_crlf },
            { "_LF",   set_eol_mode_lf },
        },
        {
            title = "Encoding",

            { "_ASCII",     set_encoding_ascii },
            { "_UTF-8",     set_encoding_utf8 },
            { "UTF-16-_BE", set_encoding_utf16le },
            { "UTF-16-_LE", set_encoding_utf16be },
        },

        SEPARATOR,

        { "Toggle View _EOL",     show_eol },
        { "Toggle _Wrap Mode",    wrap_mode  },
        { "Toggle View _Spacing", show_whitespace },

        SEPARATOR,

        { "Select _Lexer",                textadept.file_types.select_lexer },
        { "Refresh _Syntax Highlighting", update_lexing }

    }

    newkeys["f5"] = update_lexing

    newkeys[OSX and "mp" or "cs\t"] = goto_prev_buffer
    newkeys[OSX and "mn" or "c\t"]  = goto_next_buffer
    newkeys[OSX and "mb" or "cb"]   = ui.switch_buffer

end

do

    local function toggle_current_fold()
        buffer:toggle_fold(buffer:line_from_position(buffer.current_pos))
    end

    local function toggle_show_guides()
        local off = buffer.indentation_guides == 0
        buffer.indentation_guides = off and buffer.IV_LOOKBOTH or 0
    end

    local function toggle_virtual_space()
        local off = buffer.virtual_space_options == 0
        buffer.virtual_space_options = off and buffer.VS_USERACCESSIBLE or 0
    end

    local function reset_zoom()
        buffer.zoom = 0
    end

    newmenu.view = {

        title = "_View",

        SEPARATOR,

        { "Toggle Current _Fold" ,      toggle_current_fold },

        SEPARATOR,

        { "Toggle Show In_dent Guides", toggle_show_guides },
        { "Toggle _Virtual Space",      toggle_virtual_space },

        SEPARATOR,

        { "Zoom _In",                   buffer.zoom_in },
        { "Zoom _Out",                  buffer.zoom_out },
        { "_Reset Zoom",                reset_zoom },

    }

    newkeys[OSX and "m=" or "c="] = buffer.zoom_in
    newkeys[OSX and "m-" or "c-"] = buffer.zoom_out
    newkeys[OSX and "m0" or "c0"] = reset_zoom

end

do

    -- It"s a pitt y that we can"t have a proper monospaced font here so we try to make the best of it:

    local template = "\n\trelease info: %s\t\n\n\tcopyright: %s\t\n\n\tvariant: ConTeXt related editing\t\n\n\tadapted by: Hans Hagen\t"

    function show_about()
        ui.dialogs.msgbox {
            title            = "about",
            informative_text = format(template,(gsub(_RELEASE,"%s+"," ")),(gsub(_COPYRIGHT,"%s+"," ")))
        }
    end

    local function open_url(url) -- adapted from non public open_page
        local cmd = (WIN32 and 'start ""') or (OSX and "open") or "xdg-open"
        os.spawn(format('%s "%s"', cmd, url))
    end


    newmenu.help = {

        title = "_Help",

        SEPARATOR,

        { "ConTeXt garden wiki", function() open_url("http://www.contextgarden.net") end },

     -- SEPARATOR,

        { "_About", show_about }

    }

end

do 

    -- from shift F11 and startup script 

    table.insert(textadept.menu.context_menu, SEPARATOR)

    table.insert(textadept.menu.context_menu, { "wrap",     runner.wrap })
    table.insert(textadept.menu.context_menu, { "unwrap",   runner.unwrap })
    table.insert(textadept.menu.context_menu, { "sort",     runner.sort })
 -- table.insert(textadept.menu.context_menu, { "document", function() end })
 -- table.insert(textadept.menu.context_menu, { "quote",    function() end })
 -- table.insert(textadept.menu.context_menu, { "compound", function() end })
 -- table.insert(textadept.menu.context_menu, { "add",      function() end })
 -- table.insert(textadept.menu.context_menu, { "bidi",     function() end })
 -- table.insert(textadept.menu.context_menu, { "strip",    function() end })


 -- cM wrap 
 -- cR reset spelling 
 -- cI insert template  
 -- cE show log 
 -- c+ toggle strip 

    newkeys[OSX and "mm" or "cm"] = runner.wrap

end

do

    local function replace(oldmenu,newmenu)
        local n = #newmenu
        local o = #oldmenu
        for i=1,n do
            oldmenu[i] = newmenu[i]
        end
        for i=o,n+1,-1 do
            oldmenu[i] = nil
        end
    end

    replace(textadept.menu.menubar [_L["_File"]],   newmenu.file)
    replace(textadept.menu.menubar [_L["_Edit"]],   newmenu.edit)
    replace(textadept.menu.menubar [_L["_Search"]], newmenu.search)
    replace(textadept.menu.menubar [_L["_Tools"]],  newmenu.tools)
    replace(textadept.menu.menubar [_L["_Buffer"]], newmenu.buffer)
    replace(textadept.menu.menubar [_L["_View"]],   newmenu.view)
    replace(textadept.menu.menubar [_L["_Help"]],   newmenu.help)

    local char = string.char

    local combi = {
        "c", "m", "a",
        "cm", "ca", "ma",
    }

    local pad   = {
        "esc", "del", "bs",
        "up", "down", "left", "right",
        "end", "home",
        "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12",
    }

    local s = "s"

    for i=1,#combi do
        local c = combi[i]
        for i=0x20,0x40 do
            local ci = char(i)
            keys[   c..ci] = nil
            keys[s..c..ci] = nil
        end
        for i=0x41,0x5A do -- A .. Z
            local ci = char(i)
            keys[   c..ci] = nil
        end
        for i=0x5B,0x60 do
            local ci = char(i)
            keys[   c..ci] = nil
            keys[s..c..ci] = nil
        end
        for i=0x61,0x7A do -- a .. z
            local ci = char(i)
            keys[   c..ci] = nil
        end
        for i=0x7B,0x7F do
            local ci = char(i)
            keys[   c..ci] = nil
            keys[s..c..ci] = nil
        end
        for i=1,#pad do
            local pi = pad[i]
            keys[   c..pi] = nil
            keys[s..c..pi] = nil
        end
    end

    for k, v in next, newkeys do
        keys[k] = v
    end

    -- add helper to textadept-context-runner.lua instead 

    events.connect(events.INITIALIZED, function()
        for i=1,#_BUFFERS do
            local buffer = _BUFFERS[i]
            if buffer._type == OUTPUT_BUFFER then
                view:goto_buffer(i)
                io.close_buffer()
                return 
            end 
        end
    end)

end

-- We have a different way to set up files and runners. Less distributed and morein the way we
-- do things in context.

local dummyrunner    = function() end
local extensions     = textadept.file_types.extensions
local specifications = runner.specifications
local setters        = { }
local defaults       = {
    check   = dummyrunner,
    process = dummyrunner,
    preview = dummyrunner,
}

setmetatable(specifications, { __index = defaults })

function context.install(specification)
    local suffixes = specification.suffixes
    if suffixes then
        local lexer    = specification.lexer
        local setter   = specification.setter
        local encoding = specification.encoding
        for i=1,#suffixes do
            local suffix = suffixes[i]
            if lexer and extensions then
                extensions[suffix] = lexer
            end
            specifications[suffix] = specification
            if lexer then
                setters[lexer] = function()
                    if encoding == "7-BIT-ASCII" then
                        setsevenbitascii(buffer)
                    end
                    if setter then
                        setter(lexer)
                    end
                end
            end
        end
    end
end

-- Too much interference so I might drop all the old stuff eventually.

local function synchronize(lexer)
    if lexer then
        local setter = lexer and setters[lexer]
        if setter then
            local action = context.synchronize
            if action then
                action()
            end
         -- userunner()
            setter(lexer)
        else
         -- useoldrunner()
        end
    end
end

events.connect(events.FILE_OPENED,function(filename)
    synchronize(buffer:get_lexer())
end)

events.connect(events.LEXER_LOADED,function(lexer)
    synchronize(lexer)
end)

-- obsolete

-- events.connect(events.BUFFER_AFTER_SWITCH,function()
--     synchronize(buffer:get_lexer())
-- end)

-- events.connect(events.VIEW_AFTER_SWITCH,function()
--     synchronize(buffer:get_lexer())
-- end)

-- events.connect(events.BUFFER_NEW,function()
--     synchronize(buffer:get_lexer())
-- end)

-- events.connect(events.VIEW_NEW,function()
--     synchronize(buffer:get_lexer())
-- end)

-- events.connect(events.RESET_AFTER,function()
--     synchronize(buffer:get_lexer())
-- end)

-- local oldtools  = { }
-- local usingold  = false
-- local toolsmenu = textadept.menu.menubar [_L['_Tools']]
--
-- for i=1,#toolsmenu do
--     oldtools[i] = toolsmenu[i]
-- end
--
-- local function replace(tools)
--     local n = #toolsmenu
--     local m = #tools
--     for i=1,m do
--         toolsmenu[i] = tools[i]
--     end
--     for i=n,m+1,-1 do
--         toolsmenu[i] = nil
--     end
-- end
--
-- local function useoldrunner()
--     if not usingold then
--         keys [OSX and 'mr' or                  'cr'  ] = oldrunner.run
--         keys [OSX and 'mR' or (GUI and 'cR' or 'cmr')] = oldrunner.compile
--         keys [OSX and 'mB' or (GUI and 'cB' or 'cmb')] = oldrunner.build
--         keys [OSX and 'mX' or (GUI and 'cX' or 'cmx')] = oldrunner.stop
--         --
--         replace(oldtools)
--         --
--         usingold = true
--     end
-- end
--
-- local function userunner()
--     if usingold then
--         keys [OSX and 'mr' or                  'cr'  ] = runner.process
--         keys [OSX and 'mR' or (GUI and 'cR' or 'cmr')] = runner.check
--         keys [OSX and 'mB' or (GUI and 'cB' or 'cmb')] = runner.preview
--         keys [OSX and 'mX' or (GUI and 'cX' or 'cmx')] = runner.quit
--         --
--         replace(newtools)
--         --
--         usingold = false
--     end
-- end
--
-- userunner()