--- INTERACTIONS.LUA (CLI).
-- User interaction functions for Modular Politics
-- Called by modpol.lua
-- @module modpol.interactions

modpol.interactions = {}

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

--- Output: returns a string listing a module's policies
-- @function modpol.interactions.get_policy_string
-- @param org (string or number) name or id for the org
-- @param module_slug (string)
-- @param sep (string) separator string
function modpol.interactions.get_policy_string(
      org, module_slug, sep)
   local this_org = modpol.orgs.get_org(org)
   local this_module = modpol.modules[module_slug]
   local output = {}
   if not this_org.policies[module_slug] then
      return "Module not in org"
   elseif modpol.util.num_pairs(this_module.config) > 0 then
      for k, v in pairs(this_module.config) do
         local this_policy = "[Policy error]"
         if this_org.policies[module_slug][k] then
            this_policy =
               tostring(this_org.policies[module_slug][k])
         else
            if not v then
               this_policy = "none"
            else
               this_policy = tostring(v)
            end
         end
         table.insert(output, k.." - "..this_policy)
      end
      return "Policies:\n" .. table.concat(output, sep)
   else
      return "No policies"
   end
end

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

--- Output: Display a menu of commands to the user
-- @function modpol.interactions.dashboard
-- @param user (string)

-- Q: Should this return a menu of commands relevant to the specific user?
-- TKTK currently just prints all of modpol---needs major improvement
function modpol.interactions.dashboard(user)
   -- adds user to root org if not already in it
   if not modpol.instance:has_member(user) then
      modpol.instance:add_member(user)
   end

   local all_users = modpol.instance:list_members()

   print('\n-=< MODPOL DASHBOARD >=-')
   print('All orgs: (user orgs indicated by *)')
   for id, org in ipairs(modpol.orgs.array) do
      if type(org) == "table" then
         local indicator = ""
         if org:has_member(user) then indicator = "*" end
         print('['..id..'] '..indicator..org.name)
      end
   end

   -- pending list
   local user_pending = {}
   local user_pending_count = 0
   for k,v in ipairs(modpol.orgs.array) do
      if v.pending and v.pending[user] then
         if modpol.util.num_pairs(v.pending[user]) ~= 0 then
            table.insert(user_pending, v.name)
            user_pending_count = user_pending_count + 1
         end
      end
   end
   
   print('Pending actions in: '..table.concat(user_pending,', '))

   print('All users: ' .. table.concat(all_users, ', '))
   print()

   print("Commands: (O)rg, (U)ser, (R)eset, (Q)uit")

   local sel = io.read()

   if sel == "O" or sel == "o" then
      print('Access which org id?')
      sel = io.read()
      print()
      if modpol.orgs.array[tonumber(sel)] then
         local sel_org = modpol.orgs.array[tonumber(sel)].name
         modpol.interactions.org_dashboard(user, sel_org)
      else
         print("Org id not found")
         modpol.interactions.dashboard(user)
      end

   elseif sel == "U" or sel == "u" then
      print("Access which user?")
      sel = io.read()
      print()
      if modpol.instance:has_member(sel) then
         modpol.interactions.user_dashboard(
            user, sel,
            function()
               modpol.interactions.dashboard(user)
            end
         )         
      else
         print("User name not found")
         modpol.interactions.dashboard(user)
      end

   elseif sel == "R" or sel == "r" then
      modpol.instance.members = {}
      modpol.orgs.reset()
      print("Orgs and users reset")
      modpol.interactions.dashboard(user)

   elseif sel == "Q" or sel == "q" then
      return

   else
      print("Invalid input, try again")
      modpol.interactions.dashboard(user)
   end
end
   
--- Output: Displays a menu of org-specific commands to the user
-- @function modpol.interactions.org_dashboard
-- @param user (string)
-- @param org_string (string or id)
function modpol.interactions.org_dashboard(user, org_string)
   local org = modpol.orgs.get_org(org_string)
   if not org then return nil end

   -- identify parent
   local parent = ""
   if org.id == 1 then
      parent = "none"
   else
      parent = modpol.orgs.get_org(org.parent).name
   end

   -- identify children
   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

   -- prepare modules menu
   local modules = {}
   if modpol.modules then
      for k,v in pairs(modpol.modules) do
         if not v.hide and -- hide utility modules
            org.policies[k] then -- org includes it
            local module_entry = v.slug
            table.insert(modules, module_entry)
         end
      end
   end
   table.sort(modules)

   -- list pending
   local processes = {}
   for i,v in ipairs(org.processes) do
      if v ~= "deleted" then
         processes[i] = org.processes[i]
      end
   end
   local process_msg = #processes .. " total processes"
   if org.pending[user] then
      process_msg = process_msg .. " (" ..
         modpol.util.num_pairs(org.pending[user]) .. " pending)"
   else
      process_msg = process_msg .. " (0 pending)"
   end
   
   -- set up output
   print('\n-=< ORG DASHBOARD >=-')
   print("Org: " .. org.name)
   print("Parent: " .. parent)
   print("Members: " .. table.concat(org.members, ", "))
   print("Child orgs: " .. table.concat(children, ", "))
   print("Modules: " .. table.concat(modules, ", "))
   print("Pending: " .. process_msg)
   print()
   print("Commands: (M)odules, (P)ending, (B)ack")
   
   local sel = io.read()
   print()

   if sel == 'm' or sel == 'M' then
      print("Type module name: ")
      local module_sel = io.read()
      print()
      local module_result = false
      for k,v in ipairs(modules) do
         if v == module_sel then
            module_result = true
         end
      end
      local module = modpol.modules[module_sel]
      if module_result then
         modpol.interactions.binary_poll_user(
            user,
            module.name..":\n"..
            module.desc.."\n"..
            modpol.interactions.get_policy_string(
               org.name, module.slug, "\n")..
            "\n".."Proceed?",
            function(input)
               print("\n")
               if input == "Yes" then
                  org:call_module(module_sel, user)
               elseif input == "No" then
                  modpol.interactions.org_dashboard(
                     pname, org.id)
               end
         end)
      else
         print("Error: Module not found.")
         modpol.interactions.org_dashboard(user, org.id)
      end

   elseif sel == 'p' or sel == 'P' then -- Pending processes
      print("All processes: (* indicates pending)")
      for i,v in ipairs(processes) do
         local active = ''
         if org.pending[user] then
            if org.pending[user][v.id] then
               active = '*'
            end
         end
         print("["..v.id.."] "..v.slug..active)
      end
      print()
      print("Interact with which one (use [id] number)?")
      local to_interact = io.read()
      local process = org.processes[tonumber(to_interact)]
      if not process then
         modpol.interactions.message(
            user, "Not a pending process")
         modpol.interactions.org_dashboard(user, org.id)
         return
      end
      if org:has_pending_actions(user) then
         if org.pending[user][process.id] then
            org:interact(process.id, user)
         end
         modpol.interactions.org_dashboard(user, org.id)
      end
   elseif sel == 'b' or sel == 'B' then
      modpol.interactions.dashboard(user)
   else
      print("Command not found")
      modpol.interactions.org_dashboard(user, org.name)
   end
end

--- Function: modpol.interactions.user_dashboard
-- Displays a dashboard about a particular user
-- @param viewer Name of user viewing the dashboard (string)
-- @param user Name of user being viewed (string)
-- @param completion Optional function to call on Done button
function modpol.interactions.user_dashboard(viewer, user, completion)
   local user_orgs = {}
   local user_modules = {}

   print("\n-=< USER DASHBOARD: "..user.." >=-")
   print("User's orgs:")
   for id, org in ipairs(modpol.orgs.array) do
      if type(org) == "table" then
         if org:has_member(user) then 
         print(org.name)
         end
      end
   end

   print()
   print("Commands: (M)essage user, Enter when done")
   local sel = io.read()

   if sel == "M" or sel == "m" then
      modpol.interactions.message_user(
         viewer, user)
      completion()
   else
      completion()
   end
end




-- INTERACTION PRIMITIVES
-- ======================

--- Prints message to CLI.
-- Buttons: message, done
-- @function modpol.interactions.message
-- @param user (string)
-- @param message (string)
function modpol.interactions.message(user, message)
   print(user .. ": " .. message)
end

--- Gets and sends a message from one user to another
-- @function modpol.interactions.message_user
-- @param sender Name of user sending (string)
-- @param recipient Name of user receiving (string)
function modpol.interactions.message_user(sender, recipient)
   print("Enter your message for "..recipient..":")
   local sel = io.read()
   modpol.interactions.message(
      recipient,
      sel.." [from "..sender.."]")
end


--- Displays complex data to a user
-- @function modpol.interactions.display
-- @param user Name of target user (string)
-- @param title Title of display (string)
-- @param message Content of message (string or table of strings)
-- @param done Optional function for what happens when user is done
function modpol.interactions.display(user, title, message, completion)
   local output = ""
   output = "\n-=< "..title.." >=-\n\n"
   if type(message) == "table" then
      output = table.concat(message,"\n")
   elseif type(message) == "string" then
      output = message
   elseif type(message) == "number" then
      output = message
   else
      modpol.interactions.message(
         self.initiator, "Error: message not typed for display")
      modpol.interactions.message(
         self.initiator, "Error: input not typed for display")
      if completion then completion() else
         modpol.interactions.dashboard(user)
      end
   end
   print(message)
   print("\nEnter to continue")
   io.read()
   if completion then completion() else
      modpol.interactions.dashboard(user)
   end
end


--- Applies "func" to user input.
-- Func input: user input (string)
-- @function modpol.interactions.text_query
-- @param User (string)
-- @param Query (string)
-- @param func (function)
function modpol.interactions.text_query(user, query, func)
   print(user .. ": " .. query)
   answer = io.read()
   func(answer)
end

--- Output: Calls func on choice.
-- Func input: choice (string)
-- @function modpol.interactions.dropdown_query
-- @param user (string)
-- @param label (string)
-- @param options (table of strings)
-- @param func (choice) (function)
function modpol.interactions.dropdown_query(user, label, options, func)
   -- set up options
   local options_display = ""
   local options_number = 0
   for k,v in ipairs(options) do
      options_display = options_display .. k .. ". " ..
         options[k] .. "\n"
      options_number = options_number + 1
   end
   options_display = options_display .. "Select number:"
   if options_number == 0 then
      print("Error: No options given for dropdown")
      return nil
   end
   -- begin displaying
   print(user .. ": " .. label)
   print(options_display)
   -- read input and produce output
   local answer
   answer = io.read()
   answer = tonumber(answer)
   if answer then
      if answer >= 1 and answer <= options_number then
         print("Selection: " .. options[answer])
         func(options[answer])
      else
         print("Error: Not in dropdown range")
         return nil
      end
   else
      print("Error: Must be a number")
      return nil
   end
end


--- Allows user to select from a set of options
-- @function modpol.interactions.checkbox_query
-- @param user Name of user (string)
-- @param label Query for user before options (string)
-- @param options Table of options and their checked status in the form {{"option_1_string", true}, {"option_2_string", false}}
-- @param func Function to be called with param "input", made up of the corrected table in the same format as the param options
function modpol.interactions.checkbox_query(
      user, label, options, func)
   -- set up options
   local options_display = ""
   local options_number = 0
   for i,v in ipairs(options) do
      local checked = false
      if v[2] then checked = true end
      if checked then
         checked = "x"
      else
         checked = " "
      end
      options_display = options_display..i..". ["..
         checked.."] "..v[1].."\n"
      options_number = options_number + 1
   end
   if options_number == 0 then
      print("Error: No options given for dropdown")
      return nil
   end
   options_display = options_display..
      "List comma-separated options to flip (e.g., 1,2,5):"
   -- begin displaying
   print(user .. ": " .. label)
   print(options_display)
   -- read input and produce output
   local answer = io.read()
   local answer_table = {}
   for match in (answer..","):gmatch("(.-)"..",") do
      table.insert(answer_table, tonumber(match))
   end
   local result_table = modpol.util.copy_table(options)
   for i,v in ipairs(answer_table) do
      if result_table[v] then
         -- flip the boolean on selected options
         result_table[v][2] = not result_table[v][2]
      end
   end
   func(result_table)
end


--- Output: Applies "func" to user input. 
-- Func input: user input (string: y/n)
-- @function modpol.interactions.binary_poll_user
-- @param user (string)
-- @param question (string)
-- @param func (function)
function modpol.interactions.binary_poll_user(user, question, func)
   local query = "Poll for " .. user .. " (y/n): ".. question
   local answer
   repeat
      print(query)
      answer = io.read()
   until answer == "y" or answer == "n"
   if answer == "y" then
      func("Yes")
   elseif answer == "n" then
      func("No")
   else
      modpol.interactions.message(user, "Error: invalid response")
   end
end

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

--- Output: broadcasts message to all org members
-- @function modpol.interactions.message_org
-- @param initiator (string)
-- @param org (number or string)
-- @param message (string)
function modpol.interactions.message_org(initiator, org, message)
   local this_org = modpol.orgs.get_org(org)
   local users = this_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


-- TESTING

--testing command
function modpol.msg(text)
   modpol.interactions.message("TEST MSG",text)
end