--Minetest
--Copyright (C) 2014 sapier
--
--This program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 of the License, or
--(at your option) any later version.
--
--This program is distributed in the hope that it will be useful,
--but WITHOUT ANY WARRANTY; without even the implied warranty of
--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--GNU Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with this program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

--------------------------------------------------------------------------------
local function get_formspec(tabview, name, tabdata)

	if modmgr.global_mods == nil then
		modmgr.refresh_globals()
	end

	if tabdata.selected_mod == nil then
		tabdata.selected_mod = 1
	end

	local retval =
		"label[0.05,-0.25;".. fgettext("Installed Mods:") .. "]" ..
		"tablecolumns[color;tree;text]" ..
		"table[0,0.25;5.1,5;modlist;" ..
		modmgr.render_modlist(modmgr.global_mods) ..
		";" .. tabdata.selected_mod .. "]"

	local selected_mod = nil

	if filterlist.size(modmgr.global_mods) >= tabdata.selected_mod then
		selected_mod = modmgr.global_mods:get_list()[tabdata.selected_mod]
	end

	if selected_mod ~= nil then
		--check for screenshot beeing available
		local screenshotfilename = selected_mod.path .. DIR_DELIM .. "screenshot.png"
		local screenshotfile, error = io.open(screenshotfilename,"r")

		local modscreenshot
		if error == nil then
			screenshotfile:close()
			modscreenshot = screenshotfilename
		end

		if modscreenshot == nil then
				modscreenshot = defaulttexturedir .. "no_screenshot.png"
		end

		retval = retval ..
				"image[5.5,0;3,2;" .. core.formspec_escape(modscreenshot) .. "]" ..
				"label[8.25,0.6;" .. selected_mod.name .. "]" ..
				"label[5.5,1.7;".. fgettext("Mod Information:") .. "]" ..
				"textlist[5.5,2.2;6.2,2.4;description;"


		local info = core.get_mod_info(selected_mod.path)
		local desc = info.description or fgettext("No mod description available")
		local descriptionlines = core.wrap_text(desc, 42, true)
		for i = 1, #descriptionlines do
			retval = retval .. core.formspec_escape(descriptionlines[i]) .. ","
		end

		if selected_mod.is_modpack then
			retval = retval .. ";0]" ..
				"button[9.9,4.65;2,1;btn_mod_mgr_rename_modpack;" ..
				fgettext("Rename") .. "]"
			retval = retval .. "button[5.5,4.65;4.5,1;btn_mod_mgr_delete_mod;"
				.. fgettext("Uninstall Selected Modpack") .. "]"
		else
			--show dependencies
			local toadd_hard = table.concat(info.depends, ",")
			local toadd_soft = table.concat(info.optional_depends, ",")
			if toadd_hard == "" and toadd_soft == "" then
				retval = retval .. "," .. fgettext("No dependencies.")
			else
				if toadd_hard ~= "" then
					retval = retval .. "," .. fgettext("Dependencies:") .. ","
					retval = retval .. toadd_hard
				end
				if toadd_soft ~= "" then
					if toadd_hard ~= "" then
						retval = retval .. ","
					end
					retval = retval .. "," .. fgettext("Optional dependencies:") .. ","
					retval = retval .. toadd_soft
				end
			end

			retval = retval .. ";0]"

			retval = retval .. "button[5.5,4.65;4.5,1;btn_mod_mgr_delete_mod;"
				.. fgettext("Uninstall Selected Mod") .. "]"
		end
	end
	return retval
end

--------------------------------------------------------------------------------
local function handle_buttons(tabview, fields, tabname, tabdata)
	if fields["modlist"] ~= nil then
		local event = core.explode_table_event(fields["modlist"])
		tabdata.selected_mod = event.row
		return true
	end

	if fields["btn_mod_mgr_install_local"] ~= nil then
		core.show_file_open_dialog("mod_mgt_open_dlg",fgettext("Select Mod File:"))
		return true
	end

	if fields["btn_mod_mgr_rename_modpack"] ~= nil then
		local dlg_renamemp = create_rename_modpack_dlg(tabdata.selected_mod)
		dlg_renamemp:set_parent(tabview)
		tabview:hide()
		dlg_renamemp:show()
		return true
	end

	if fields["btn_mod_mgr_delete_mod"] ~= nil then
		local dlg_delmod = create_delete_mod_dlg(tabdata.selected_mod)
		dlg_delmod:set_parent(tabview)
		tabview:hide()
		dlg_delmod:show()
		return true
	end

	if fields["mod_mgt_open_dlg_accepted"] ~= nil and
		fields["mod_mgt_open_dlg_accepted"] ~= "" then
		modmgr.installmod(fields["mod_mgt_open_dlg_accepted"],nil)
		return true
	end

	return false
end

--------------------------------------------------------------------------------
return {
	name = "mods",
	caption = fgettext("Mods"),
	cbf_formspec = get_formspec,
	cbf_button_handler = handle_buttons,
	on_change = gamemgr.update_gamelist
}