-- INTERACTIONS.LUA (for Minetest)

-- CONTEXTUAL STUFF
-- ================

-- First, set up contexts to enable passing across formspecs
-- https://rubenwardy.com/minetest_modding_book/en/players/formspecs.html#contexts

local _contexts = {}
local function get_context(name)
    local context = _contexts[name] or {}
    _contexts[name] = context
    return context
end
minetest.register_on_leaveplayer(function(player)
    _contexts[player:get_player_name()] = nil
end)

-- table of formspec field responses
local formspec_fields = {}


-- UTILITIES
-- =========

-- Function: formspec_list
-- for use generating option lists in formspecs from tables
-- input: table of strings
-- output: a formspec-ready list of the strings
local function formspec_list(array)
   local escaped = {}
   if not array then
      return ""
   end
   for i = 1, #array do
      escaped[i] = minetest.formspec_escape(array[i])
   end
   return table.concat(escaped,",")
end


-- DASHBOARDS
-- ==========

-- Function: modpol.interactions.dashboard(user)
-- Params: user (string)
-- Q: Should this return a menu of commands relevant to the specific user?
-- Output: Displays a menu of commands to the user
-- TODO currently a manually curated list---needs major improvement
function modpol.interactions.dashboard(user)
   -- prepare data
   -- to add: nested orgs map
   local all_orgs = modpol.orgs.list_all()
   local user_orgs = modpol.orgs.user_orgs(user)
   local all_users = modpol.list_users()
   -- set up formspec
    local formspec = {
       "formspec_version[4]",
       "size[10,8]",
       "label[0.5,0.5;M O D U L A R  P O L I T I C S]",
       "label[0.5,2;All orgs:]",
       "dropdown[2,1.5;5,0.8;all_orgs;"..formspec_list(all_orgs)..";;]",
       "label[0.5,3;Your orgs:]",
       "dropdown[2,2.5;5,0.8;user_orgs;"..formspec_list(user_orgs)..";;]",
       "label[0.5,4;All users:]",
       "dropdown[2,3.5;5,0.8;all_users;"..formspec_list(all_users)..";;]",
       "label[0.5,5;Processes:]",
       "dropdown[2,4.5;5,0.8;processes;TBA;;]",
       "button[0.5,7;1,0.8;test_poll;Test poll]",
       "button[2,7;1,0.8;add_org;Add org]",
       "button[3.5,7;1.5,0.8;remove_org;Remove org]",
       "button_exit[8.5,7;1,0.8;close;Close]",
    }
    local formspec_string = table.concat(formspec, "")
    -- present to player
    minetest.show_formspec(user, "modpol:dashboard", formspec_string)
end
-- receive input
minetest.register_on_player_receive_fields(function (player, formname, fields)
      if formname == "modpol:dashboard" then
         local pname = player:get_player_name()
         if nil then
         -- buttons first
         elseif fields.test_poll then
            modpol.interactions.binary_poll_org(pname, 1, "Poll question (yes/no):")
         elseif fields.add_org then
            modpol.interactions.add_org(pname, 1)
         elseif fields.remove_org then
            modpol.interactions.remove_org(pname)
         -- dropdowns need to go last
         elseif fields.close then
            minetest.close_formspec(pname, formname)
         elseif fields.all_orgs or fields.user_orgs then
            local org_name = fields.all_orgs or fields.user_orgs
            modpol.interactions.org_dashboard(pname, org_name)
         end
      end
end)


-- Function: modpol.interactions.org_dashboard
-- Params: user (string), org_name (string)
-- Output: Displays a menu of org-specific commands to the user
function modpol.interactions.org_dashboard(user, org_name)
   -- prepare data
   local org = modpol.orgs.get_org(org_name)
   if not org then return nil end
   local is_member = org:has_member(user)
   local membership_toggle = function()
      local toggle_code = ""
      if is_member then
         toggle_code = toggle_code
            ..minetest.formspec_escape("leave")..";"
            ..minetest.formspec_escape("Leave").."]"
      else
         toggle_code = toggle_code
            ..minetest.formspec_escape("join")..";"
            ..minetest.formspec_escape("Join").."]"
      end
      return toggle_code
   end
   local children = {}
   for k,v in ipairs(org.children) do
      local this_child = modpol.orgs.get_org(v)
      table.insert(children, this_child.name)
   end
   -- set player context
   local user_context = {}
   user_context["current_org"] = org_name
   _contexts[user] = user_context
   -- set up formspec
    local formspec = {
       "formspec_version[4]",
       "size[10,8]",
       "label[0.5,0.5;Org: "..
          minetest.formspec_escape(org_name).."]",
       "label[0.5,1;Parent: TODO]",
       "button[8.5,0.5;1,0.8;"..membership_toggle(),
       "label[0.5,2;Members:]",
       "dropdown[2,1.5;5,0.8;user_orgs;"..formspec_list(org.members)..";;]",
       "label[0.5,3;Children:]",
       "dropdown[2,2.5;5,0.8;children;"..formspec_list(children)..";;]",
       "label[0.5,4;Policies:]",
       "dropdown[2,3.5;5,0.8;policies;"..formspec_list(org.policies)..";;]",
       "label[0.5,5;Processes:]",
       "dropdown[2,4.5;5,0.8;processes;"..formspec_list(org.processes)..";;]",
       "button[0.5,7;1,0.8;test_poll;Test poll]",
       "button[2,7;1,0.8;add_child;Add child]",
       "button[3.5,7;1.5,0.8;remove_org;Remove org]",
       "button[8.5,7;1,0.8;back;Back]",
    }
    local formspec_string = table.concat(formspec, "")
    -- present to player
    minetest.show_formspec(user, "modpol:org_dashboard", formspec_string)
end
-- receive input
minetest.register_on_player_receive_fields(function (player, formname, fields)
      if formname == "modpol:org_dashboard" then
         local pname = player:get_player_name()
         local org = modpol.orgs.get_org(_contexts[pname].current_org)
         if nil then
         elseif fields.join then
            org:add_member(pname)
            modpol.interactions.org_dashboard(pname,org.name)
         elseif fields.leave then
            org:remove_member(pname)
            modpol.interactions.dashboard(pname)
         elseif fields.test_poll then
            modpol.interactions.binary_poll_org(pname, _contexts.pname.current_org.id, "Poll question (yes/no):")
         elseif fields.add_child then
            modpol.interactions.add_org(pname, org.id)
         elseif fields.remove_org then
            modpol.interactions.remove_org(pname)
         elseif fields.back then
            modpol.interactions.dashboard(pname)
         end
      end
end)



-- BASIC INTERACTION FUNCTIONS
-- ===========================

-- Function: modpol.interactions.message
-- input: message (string)
-- output
modpol.interactions.message = function(user, message)
   minetest.chat_send_player(user, message)
end

-- Function: modpol.interactions.text_query
-- Overrides function at modpol/interactions.lua
-- input: Query (string), User (string)
-- output: User response (string)
-- TODO Need to switch "user" to index not name
function modpol.interactions.text_query(user, query)
   -- set up formspec
    local formspec = {
       "formspec_version[4]",
       "size[10,4]",
       "label[0.5,1;", minetest.formspec_escape(query), "]",
       "field[0.5,1.25;9,0.8;input;;]",       
       "button[0.5,2.5;1,0.8;yes;OK]",
    }
    local formspec_string = table.concat(formspec, "")
    -- present to players
    minetest.show_formspec(user, "modpol:text_query", formspec_string)
end
-- receive fields
minetest.register_on_player_receive_fields(function (player, formname, fields)
      if formname == "modpol:text_query" then
         local pname = player:get_player_name()
         if _contexts[pname] then
            _contexts[pname](fields.input)
         end
         minetest.close_formspec(pname, formname)
      end
end)


-- Function: dropdown_query
-- input: user (string), label (string), options (table of strings)
function modpol.interactions.dropdown_query(user, label, options)
   -- set up formspec
   local formspec = {
      "formspec_version[4]",
      "size[10,4]",
      "label[0.5,1;"..minetest.formspec_escape(label).."]",
      "dropdown[0.5,1.25;9,0.8;input;"..formspec_list(options)..";;]",
      "button[0.5,2.5;1,0.8;yes;OK]",
   }
   local formspec_string = table.concat(formspec, "")
   -- present to players
   minetest.show_formspec(user, "modpol:dropdown_query", formspec_string)
end
-- receive fields
minetest.register_on_player_receive_fields(function (player, formname, fields)
      if formname == "modpol:dropdown_query" then
         local pname = player:get_player_name()
         if _contexts[pname] then
            _contexts[pname](fields.input)
         end
         minetest.close_formspec(pname, formname)
      end
end)


-- SECONDARY INTERACTIONS
-- ======================

-- Function: modpol.binary_poll_user(user, question)
-- Overrides function at modpol/interactions.lua
-- presents a yes/no poll to a user, returns answer
-- 
function modpol.interactions.binary_poll_user(user, question)
   -- set up formspec
   local text = "Poll: " .. question
   local formspec = {
      "formspec_version[4]",
      "size[5,3]",
      "label[0.375,0.5;", minetest.formspec_escape(text), "]",
      "button[1,1.5;1,0.8;yes;Yes]",
      "button[2,1.5;1,0.8;no;No]",
      --TKTK can we enable text wrapping?
      --TKTK we could use scroll boxes to contain the text
   }
   local formspec_string = table.concat(formspec, "")
   -- present to player
   minetest.show_formspec(user, "modpol:binary_poll_user", formspec_string)
end

minetest.register_on_player_receive_fields(function (player, formname, fields)
      local pname = player:get_player_name()
      -- modpol:binary_poll
      if formname == "modpol:binary_poll_user" then
         local vote = nil
         if fields.yes then vote = fields.yes
         elseif fields.no then vote = fields.no
         elseif fields.abstain then vote = fields.abstain
         end
         if vote then
            modpol.interactions.message(pname, "Vote recorded")
            minetest.chat_send_all(pname .. " voted " .. vote)
            --TODO : we should send the message to all in that org, not to all players
         end
         minetest.close_formspec(pname, formname)
         return vote
      end
end)

-- COMPLEX INTERACTIONS
-- ====================

-- Function: modpol.interactions.binary_poll_org
-- input: initator (user string), org (number)
-- output: interaction begins
function modpol.interactions.binary_poll_org(initiator, org)
   -- start formspec
   modpol.interactions.text_query(initiator, "Poll question (yes/no):")
   -- set user's context to followup function
   _contexts[initiator] =
      function(input)
         local users = modpol.list_users()
         for k,v in ipairs(users) do
            modpol.interactions.binary_poll_user(v, input)
         end
         _contexts[initiator] = nil
      end
end

-- Function: modpol.interactions.add_org
-- input: initator (user string), base_org_id (ID)
-- output: interaction begins
function modpol.interactions.add_org(initiator, base_org_id)
   -- start formspec
   modpol.interactions.text_query(initiator, "Org name:")
   -- set user's context to followup function
   _contexts[initiator] = function(input)
      if input then
         local base_org = modpol.orgs.get_org(base_org_id)
         local result = base_org:add_org(input, initiator)
         if result then
            local message = input .. " created"
            modpol.interactions.message(initiator, message)
         end
      end
      _contexts[initiator] = nil
      modpol.interactions.dashboard(initiator)
   end
end

-- Function: modpol.interactions.remove_org
-- input: initator (user string)
-- output: interaction begins
function modpol.interactions.remove_org(initiator)
   -- start formspec
   local orgs_list = modpol.orgs.list_all()
   local label = "Choose an org to remove:"
   modpol.interactions.dropdown_query(initiator, label, orgs_list)
   -- set user's context to followup function
   _contexts[initiator] = function(input)
      if input then
         local target_org = modpol.orgs.get_org(input)
         local result = target_org:delete()
         if result then
            local message = input .. " deleted"
            modpol.interactions.message(initiator, message)
         end
      end
      _contexts[initiator] = nil
      modpol.interactions.dashboard(initiator)
   end
end