-- INTERACTIONS.LUA (for Minetest)

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

-- _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)

-- 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;MODPOL DASHBOARD]",
       "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)..";;]",
       "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[5.5,7;1.5,0.8;reset_orgs;Reset orgs]",
       "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
            -- FOR TESTING PURPOSES ONLY
            modpol.interactions.text_query(
               pname,"Poll question:",
               function(input)
                  modpol.interactions.binary_poll_user(
                     pname, input,
                     function(vote)
                        modpol.interactions.message(
                           pname, pname .. " voted " .. vote)
                  end)
            end)
         elseif fields.add_org then
            modpol.interactions.add_org(pname, 1)
         elseif fields.remove_org then
            modpol.interactions.remove_org(pname)
         elseif fields.reset_orgs then
            modpol.orgs.reset()
            modpol.instance:add_member(pname)
            modpol.interactions.dashboard(pname)
            
         -- Put all dropdowns at the end
         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
   -- identify parent
   local parent = modpol.orgs.get_org(org.parent)
   if parent then parent = parent.name
   else parent = "none" end
   -- prepare children menu
   local children = {"View..."}
   for k,v in ipairs(org.children) do
      local this_child = modpol.orgs.get_org(v)
      table.insert(children, this_child.name)
   end
   -- prepare policies menu
   local policies = {"View..."}
   for k,v in pairs(org.policies) do
      table.insert(policies, k .. ": " ..
                   org.policies[k].process_type)
   end
   table.insert(policies, "Add policy")
   -- prepare processes menu
   local processes = {"View..."}
   for k,v in ipairs(org.processes) do
      local this_request = org.requests[v.request_id]
      if type(this_request) == "table" then 
         local active = ''
         if org.pending[user] then
            if org.pending[user][v.id] then
               active = '*'
            end
         end
         local req_str = "[" .. v.id .. "] " ..
            active .. this_request.type
         if this_request.params[1] then
            req_str = req_str .. ": " ..
               table.concat(this_request.params, ", ")
         end
         table.insert(processes, req_str)
      end
   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: "..parent.."]",
       "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(policies)..";;]",
       "label[0.5,5;Processes:]",
       "dropdown[2,4.5;5,0.8;processes;"..formspec_list(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
            local new_request = {
               user = pname,
               type = "add_member",
               params = {pname}
            }
            org:make_request(new_request)
            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, org.id,
               function(input)
                  modpol.interactions.message_org(
                     pname,
                     org.id,
                     "New response: " .. input)
            end)
         elseif fields.add_child then
            modpol.interactions.text_query(
               pname, "Child org name:",
               function(input)   
                  local new_request = {
                     user = pname,
                     type = "add_org",
                     params = {input}
                  }
                  org:make_request(new_request)
                  modpol.interactions.message(pname,"requested")
                  modpol.interactions.org_dashboard(
                     pname,org.name)
            end)
         elseif fields.remove_org then
            local new_request = {
               user = pname,
               type = "delete",
               params = {}
            }
            org:make_request(new_request)
            modpol.interactions.org_dashboard(pname,org.name)
         elseif fields.back then
            modpol.interactions.dashboard(pname)
            
         -- Put all dropdowns at the end
         elseif fields.policies
            and fields.policies ~= "View..." then
            local policy
            if fields.policies == "Add policy" then
               policy = nil
            elseif fields.policies == "View..." then
               return
            else
               policy = string.match(fields.policies,"(%w+)%:")
            end
            modpol.interactions.policy_dashboard(
               pname, org.id, policy)
         elseif fields.processes
            and fields.processes ~= "View..." then
            local sel = string.match(fields.processes,"%[(%d)%]")
            local process = org.processes[tonumber(sel)]
            if process then
               process:interact(pname)
            end
         elseif fields.children
               and fields.children ~= "View..." then
            local org_name = fields.children
            modpol.interactions.org_dashboard(pname, org_name)
         end
      end
end)


-- Function: modpol.interactions.policy_dashboard
-- input: user (string), org_id (int), policy (string)
-- output: opens a dashboard for viewing/editing policy details
-- TODO
function modpol.interactions.policy_dashboard(
      user, org_id, policy)
   modpol.interactions.message(
      user,
      "Not yet implemented: " .. policy)
end


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

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

-- Function: modpol.interactions.text_query
-- Overrides function at modpol/interactions.lua
-- input: user (string), query (string), func (function)
--   func input: user input (string)
-- output: Applies "func" to user input
function modpol.interactions.text_query(user, query, func)
   -- 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)
    -- put func in _contexts
    if _contexts[user] == nil then _contexts[user] = {} end
    _contexts[user]["text_query_func"] = func
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()
         local input = fields.input
         if not input then
            -- no input, do nothing
         else
            local func = _contexts[pname]["text_query_func"]
            if func then
               func(input)
            else
               modpol.interactions.message(pname, "text_query: " .. input)
            end
         end
         minetest.close_formspec(pname, formname)
      end
end)

-- Function: dropdown_query
-- input: user (string), label (string), options (table of strings), func (function)
--    func input: choice (string)
-- output: calls func on user choice
function modpol.interactions.dropdown_query(user, label, options, func)
   -- 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;cancel;Cancel]",
   }
   local formspec_string = table.concat(formspec, "")
   -- present to players
   minetest.show_formspec(user, "modpol:dropdown_query", formspec_string)
   -- put func in _contexts
   if _contexts[user] == nil then _contexts[user] = {} end
   _contexts[user]["dropdown_query_func"] = func
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 fields.cancel ~= "cancel" then
            local choice = fields.input
            local func = _contexts[pname]["dropdown_query_func"]
            if not choice then
               -- no choice, do nothing
            elseif func then
               func(choice)
            else
               modpol.interactions.message(pname, "dropdown_query: " .. choice)
            end
         end
         minetest.close_formspec(pname, formname)
      end
end)


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

-- Function: modpol.binary_poll_user(user, question, function)
-- Overrides function at modpol/interactions.lua
-- Params: user (string), question (string), func (function)
--   func input: user input (string: y/n)
-- Output: Applies "func" to user input
function modpol.interactions.binary_poll_user(user, question, func)
   -- set up formspec
   local formspec = {
      "formspec_version[4]",
      "size[5,3]",
      "label[0.375,0.5;",minetest.formspec_escape(question), "]",
      "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, "")
   if _contexts[user] == nil then _contexts[user] = {} end
   _contexts[user]["binary_poll_func"] = func
   -- 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
         end
         if vote then
            modpol.interactions.message(pname, "Responded " .. vote)
            local func = _contexts[pname]["binary_poll_func"]
            if func then func(vote) end
         end
         minetest.close_formspec(pname, formname)
      end
end)

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

-- Function: modpol.interactions.message_org
-- input: initiator (string), org_id (number), message (string)
-- output: broadcasts message to all org members
function modpol.interactions.message_org(initiator, org_id, message)
   local org = modpol.orgs.get_org(org_id)
   local users = org:list_members()
   for k,v in ipairs(users) do
      modpol.interactions.message(v, message)
   end
end


-- Function: modpol.interactions.binary_poll_org
-- input: initator (user string), org_id (number)
-- output: gets question from initiator, asks all org members, broadcasts answers
-- TODO for testing. This should be implemented as a request.
function modpol.interactions.binary_poll_org(initiator, org_id, func)
   local org = modpol.orgs.get_org(org_id)
   local users = org:list_members()
   modpol.interactions.text_query(
      initiator, "Yes/no poll question:",
      function(input)
         for k,v in ipairs(users) do
            modpol.interactions.binary_poll_user(v, input, func)
         end
   end)
end

-- Function: modpol.interactions.add_org
-- input: initator (user string), base_org_id (ID)
-- output: interaction begins
-- GODMODE
function modpol.interactions.add_org(user, base_org_id)
   modpol.interactions.text_query(
      user,"Org name:",
      function(input)
         local base_org = modpol.orgs.get_org(1)
         local result = base_org:add_org(input, user)
         local message = input .. " created"
         modpol.interactions.message(user, message)
         modpol.interactions.dashboard(user)
   end)
end

-- Function: modpol.interactions.remove_org
-- input: initator (user string)
-- output: interaction begins
-- GODMODE
function modpol.interactions.remove_org(user)
   -- start formspec
   local orgs_list = modpol.orgs.list_all()
   local label = "Choose an org to remove:"
   modpol.interactions.dropdown_query(
      user, label, orgs_list,
      function(input)
         if input then
            local target_org = modpol.orgs.get_org(input)
            local result = target_org:delete()
            local message = input .. " deleted"
            modpol.interactions.message(user, message)
         end
         modpol.interactions.dashboard(user)
   end)
end