local config = require("../../config") ---@type Config
local inv;

if config.inventories == nil and config.remote.connection then
  inv = require("modules.inv_ra")
else
  inv = require("modules.inv")
end
local function levDist(s, t)
  local n = #s
  local m = #t

  if n == 0 then return m end
  if m == 0 then return n end

  -- create matrix
  local d = {}
  for i = 0, n do
    d[i] = {}
  end

  -- initialize
  for i = 0, n do d[i][0] = i end
  for j = 0, m do d[0][j] = j end

  -- main loop
  for i = 1, n do
    local s_i = s:sub(i, i)

    for j = 1, m do
      -- safeguard shortcut
      if i == j and d[i][j] and d[i][j] > 4 then
        return n
      end

      local t_j = t:sub(j, j)
      local cost = (s_i == t_j) and 0 or 1

      local mi = math.min(
        d[i - 1][j] + 1,
        d[i][j - 1] + 1,
        d[i - 1][j - 1] + cost
      )

      d[i][j] = mi

      -- Damerau transposition
      if i > 1 and j > 1 and s_i == t:sub(j - 1, j - 1) and s:sub(i - 1, i - 1) == t_j then
        d[i][j] = math.min(d[i][j], d[i - 2][j - 2] + cost)
      end
    end
  end

  return d[n][m]
end

local function findBest(data, item)
  local sorted_data = {}

  for _, z in ipairs(data) do
    local parts = {}
    for part in string.gmatch(z, "([^:]+)") do
      table.insert(parts, part)
    end

    local key = parts[1] .. ":" .. (parts[2] or "")
    local dist = levDist(item, parts[2] or "")
    table.insert(sorted_data, { key, dist })
  end

  table.sort(sorted_data, function(a, b)
    return a[2] < b[2]
  end)

  local best = {}
  local best_dist = sorted_data[1][2]
  for _, z in ipairs(sorted_data) do
    if z[2] == best_dist then
      table.insert(best, z)
    else
      break
    end
  end

  return best
end

local BOT_NAME = "&cS &eI&an&3c &5S&cI&6S"

function auth(user)
  local manip = config.chatbox.players[user]
  if manip then
    return true
  else
    chatbox.tell(user, "You are not authorized to use this command.", BOT_NAME)
    return false
  end
end

function run()
  if config.chatbox == nil then return end

  while true do
    local _, user, command, args = os.pullEvent("command")

    if command == (config.chatbox.prefix or "sis") then
      if args[1] == "whoami" then
        local manip = config.chatbox.players[user]
        if manip then
          chatbox.tell(user, "You are " .. user .. ", linked with `" .. manip .. "`.", BOT_NAME)
        else
          chatbox.tell(user, "You are not registered. Ask the creator of this SIS to be registered.", BOT_NAME)
        end
      elseif args[1] == "deposit" then
        if not auth(user) then goto continue end

        if not args[2] then
          chatbox.tell(user, "Supply a item (minecraft:`diamond` part) to deposit it!", BOT_NAME)
          goto continue
        end


        local perip = peripheral.wrap(config.chatbox.players[user])

        ---@type ccTweaked.peripheral.Inventory
        local peripInventory = perip.getInventory()
        local invList = peripInventory.list()

        local allItems = {}
        local seen = {}

        for _, stack in pairs(invList) do
          local name = stack and stack.name
          if name and not seen[name] then
            seen[name] = true
            allItems[#allItems + 1] = name
          end
        end

        local best = findBest(allItems, args[2])

        local itemName = ""

        if #best > 1 then
          itemName = best[1][1]
          if string.find(":", args[2]) then
            itemName = args[2]
          end
          chatbox.tell(user, "`WARNING`: Item most likely inaccurate. Assuming " .. itemName, BOT_NAME)
        else
          itemName = best[1][1]
        end

        local slots = {}

        for slot, item in pairs(peripInventory.list()) do
          if item.name == itemName then
            table.insert(slots, slot)
          end
        end

        local amount = nil

        if args[3] then
          amount = tonumber(args[3], 10)
        end

        local moved = inv.sendItemAwayMultiple(slots, peripInventory, peripInventory, amount)

        chatbox.tell(user, "Moved `" .. tostring(moved) .. "` items.", BOT_NAME)
      elseif args[1] == "withdraw" then
        if not auth(user) then goto continue end

        if not args[2] then
          chatbox.tell(user, "Supply a item (minecraft:`diamond` part) to withdraw it!", BOT_NAME)
          goto continue
        end

        local perip = peripheral.wrap(config.chatbox.players[user])

        ---@type ccTweaked.peripheral.Inventory
        local peripInventory = perip.getInventory()

        local best = findBest(inv.listNames(), args[2])

        local itemName = ""

        if #best > 1 then
          itemName = best[1][1]
          if string.find(":", args[2]) then
            itemName = args[2]
          end
          chatbox.tell(user, "`WARNING`: Item most likely inaccurate. Assuming " .. itemName, BOT_NAME)
        else
          itemName = best[1][1]
        end

        local amount = nil

        if args[3] then
          amount = tonumber(args[3], 10)
        end

        local moved = inv.sendItemToSelf(itemName, peripInventory, amount)

        chatbox.tell(user, "Moved `" .. tostring(moved) .. "` items.", BOT_NAME)
      end
    end
    ::continue::
  end
end

return {
  run = run
}