CCleverBot

--
--  CCleverBot
--  Made by 1lann and GravityScore
--


--  Variables

local version = "1.1"

local responseURL = "http://firewolfcc.com/ccleverbot/response.php"
local event_updateChat = "ccleverbot_updateChatEvent"
local event_continue = "ccleverbot_continueEvent"
local event_exit = "ccleverbot_exitEvent"

local chatHistory = {}
local chatLog = {}
local w, h = term.getSize()

--  Drawing

local function centerPrint(text, y)
    if type(text) == "table" then for _, v in pairs(text) do centerPrint(v) end
    else
        local x, y = term.getCursorPos()
        term.setCursorPos((w + 2)/2 - text:len()/2, ny or y)
        print(text)
    end
end

local function drawChat(chatData, offset, thinking, scrolled)
    local a, b = false, false
    for i = 1, 10 do
        term.setCursorPos(3, 16 - i)
        term.clearLine()
    end

    for i = 1, 10 do
        local c = chatData[#chatData + 1 - i + offset]

        if #chatData + 1 - i + offset < 1 then break end
        term.setCursorPos(3, 16 - i)

        if thinking and i == 1 then
            term.setTextColor(colors.lightGray)
            write("...")
            offset = offset + 1
        else
            if c[2] == "user" then
                term.setTextColor(colors.black)
                write(c[1])
            else
                term.setTextColor(colors.lightBlue)
                if i == 1 and scrolled ~= true then
                    a = true
                elseif i == 2 and scrolled ~= true then
                    b = true
                else
                    write(c[1])
                end
            end
        end
    end

    if a then
        term.setTextColor(colors.lightBlue)
        if b then
            term.setCursorPos(3, 14)
            textutils.slowWrite(chatData[#chatData - 1][1])
        end

        term.setCursorPos(3, 15)
        textutils.slowWrite(chatData[#chatData][1])
    end

    os.queueEvent(event_continue)
end


--  Interface

local function interface()
    local scrollPos = 0
    local updateChatLog = nil
    while true do
        local e, p1, p2 = os.pullEvent()
        if e == event_updateChat then
            updateChatLog = textutils.unserialize(p1)
            scrollPos = 0
            drawChat(updateChatLog, 0, p2)
        elseif e == event_exit then
            return
        elseif e == "mouse_scroll" then
            if scrollPos + p1 <= 0 and updateChatLog then
                if #updateChatLog > 10 and #updateChatLog >= (scrollPos+p1)*-1+10 then
                    scrollPos = scrollPos+p1
                    local scrollChat = {}
                    for i = 10, 1, -1 do
                        scrollChat[i] = updateChatLog[#updateChatLog-(10-i)+scrollPos]
                    end
                    local x, y = term.getCursorPos()
                    drawChat(scrollChat, 0, nil, true)
                    term.setCursorPos(x, y)
                    term.setTextColor(colors.gray)
                end
            end
        end
    end
end


--  Input

local function input()
    while true do
        -- Read
        term.setCursorPos(3, 17)
        term.setTextColor(colors.gray)
        term.clearLine()
        write("> ")
        local inputData = read(nil, chatHistory):gsub("^%s*(.-)%s*$", "%1")
        table.insert(chatHistory, inputData)
        if inputData == "/exit" then
            os.queueEvent(event_exit)
            return
        end

        -- Parse input
        if inputData == "" then inputData = "Hello." end
        inputData = inputData:sub(1, 1):upper() .. inputData:sub(2, -1)
        if not inputData:sub(-1, -1):find("[\.\?!,]") then inputData = inputData .. "." end
        if inputData:len() > 45 and not inputData:sub(1, 45):find(" ") then
            inputData = inputData:sub(1, 45) .. " " .. inputData:sub(46, -1)
        end

        -- Clear
        term.setCursorPos(3, 17)
        term.clearLine()
        write("> ")

        if inputData:len() > 46 then
            local spaceData = {}
            local loopNum = 0
            while true do
                loopNum = inputData:find(" ", loopNum + 1, 1, true)
                table.insert(spaceData, loopNum)
                if type(loopNum) ~= "number" then
                    table.insert(spaceData, 47)
                    break
                end
            end

            for k, v in ipairs(spaceData) do
                if v > 46 then
                    chatLog[#chatLog + 1] = {inputData:sub(1, spaceData[k - 1] - 1), "user"}
                    chatLog[#chatLog + 1] = {inputData:sub(spaceData[k - 1] + 1, -1), "user"}
                    break
                end
            end
        else
            chatLog[#chatLog + 1] = {inputData, "user"}
        end

        os.queueEvent(event_updateChat, textutils.serialize(chatLog), true)

        -- Get response
        local response = http.post(responseURL, "input=" .. textutils.urlEncode(inputData))
        if response then
            local responseData = response.readAll()
            if responseData:len() > 46 then
                local spaceData = {}
                local loopNum = 0
                while true do
                    loopNum = responseData:find(" ", loopNum + 1, 1, true)
                    table.insert(spaceData, loopNum)
                    if type(loopNum) ~= "number" then
                        table.insert(spaceData, 47)
                        break
                    end
                end

                for k, v in ipairs(spaceData) do
                    if v > 46 then
                        chatLog[#chatLog + 1] = {responseData:sub(1, spaceData[k - 1] - 1), "bot"}
                        chatLog[#chatLog + 1] = {responseData:sub(spaceData[k - 1]+1, -1), "bot"}
                        break
                    end
                end
            else
                chatLog[#chatLog + 1] = {responseData, "bot"}
            end
        else
            chatLog[#chatLog + 1] = {"CCBot: An error has ocurred!", "bot"}
        end

        os.queueEvent(event_updateChat, textutils.serialize(chatLog))
        os.pullEvent(event_continue)
    end
end


--  Main

local function main()
    -- Top logo
    term.setBackgroundColor(colors.white)
    term.clear()
    term.setCursorPos(19, 2)

    term.setTextColor(colors.lightBlue)
    write("CClever")
    term.setTextColor(colors.lime)
    write("B")
    term.setTextColor(colors.yellow)
    write("o")
    term.setTextColor(colors.red)
    write("t  ")
    term.setTextColor(colors.lightGray)
    write(version)
    term.setTextColor(colors.gray)
    term.setCursorPos(1, 3)
    centerPrint("- www.cleverbot.com -")

    -- Run
    parallel.waitForAll(input, interface)
end

-- Check
if not http then
    print("HTTP API Needs to be Enabled!")
    print("CCleverBot heavily orties on it!")
    error()
end

-- Run
local _, err = pcall(main)
if err then
    term.setTextColor(colors.white)
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setCursorPos(1, 1)
    print("Error!")
    print(err)
    print("\nPress any key to exit...")
    os.pullEvent("key")
end

-- Exit
term.setTextColor(colors.white)
term.setBackgroundColor(colors.black)
term.clear()
term.setCursorPos(1, 1)
centerPrint("Thank You for Using CCleverBot " .. version)
centerPrint("Made by 1lann and GravityScore")