-- Original author: Scott Adkins <adkinss@gmail.com> (Zucanthor)
-- Heavy modifications: Zygmut
--
-- This program monitors work requests for the Minecolonies Warehouse and
-- tries to fulfill requests from the Applied Energistics 2 network. If the
-- AE2 network doesn't have enough items and a crafting pattern exists, a
-- crafting job is scheduled to restock the items in order to fulfill the
-- work request.  The script will continuously loop, monitoring for new
-- requests and checking on crafting jobs to fulfill previous requests.
--
-- The following is required for setup:
--   * 1 ComputerCraft Computer
--   * 1 or more ComputerCraft Monitors (recommend 3x3 advanced monitors)
--   * 1 Advanced Peripheral Colony Integrator
--   * 1 Advanced Peripheral AE2 Bridge
--   * 1 Chest or other storage container
-- Attach an AE2 Cable from the AE2 network to the AE2 Bridge. Connect the
-- storage container to the Minecolonies Warehouse Hut block directly or
-- to an ender chest and then pipe ender chest contents out to the warehouse
-- racks. Latter makes it easier to upgrade warehouse.

-- Prints strings left, centered, or right justified at a specific row and
-- specific foreground/background color.
function MonPrintRow(monitor, y, position, text, textColor, bgColor)
    local w = select(1, monitor.getSize())
    local fg = monitor.getTextColor()
    local bg = monitor.getBackgroundColor()

    local positions = {
        left   = 1,
        center = math.floor((w - #text) / 2),
        right  = w - #text,
    }

    local x = positions[position] or 1

    if textColor then monitor.setTextColor(textColor) end
    if bgColor then monitor.setBackgroundColor(bgColor) end

    monitor.setCursorPos(x, y)
    monitor.write(text)
    monitor.setTextColor(fg)
    monitor.setBackgroundColor(bg)

    return y + 1
end

-- Utility function that displays current time and remaining time on timer.
-- For time of day, yellow is day, orange is sunset/sunrise, and red is night.
-- The countdown timer is orange over 15s, yellow under 15s, and red under 5s.
-- At night, the countdown timer is red and shows PAUSED insted of a time.
function DisplayTimer(monitor, time)
    local now = os.time()
    local cycle = "day"
    local cycle_color = colors.orange

    if now >= 4 and now < 6 then
        cycle = "sunrise"
        cycle_color = colors.orange
    elseif now >= 6 and now < 18 then
        cycle = "day"
        cycle_color = colors.yellow
    elseif now >= 18 and now < 19.5 then
        cycle = "sunset"
        cycle_color = colors.orange
    elseif now >= 19.5 or now < 5 then
        cycle = "night"
        cycle_color = colors.red
    end

    MonPrintRow(monitor, 1, "left", string.format("Time: %s [%s]", textutils.formatTime(now, false), cycle), cycle_color)

    if cycle ~= "night" then
        MonPrintRow(monitor, 1, "right", string.format("Remaining: %ss", time), colors.blue)
    else
        MonPrintRow(monitor, 1, "right", "Remaining: PAUSED", colors.red)
    end

    return cycle
end

-- Scan all open work requests from the Warehouse and attempt to satisfy those
-- requests. This function is not called at night to save on some ticks, as the
-- colonists are in bed anyways. Item colors go as follow:
--   - Red: Work order can't be satisfied
--          (lack of pattern or lack of required crafting ingredients).
--   - Yellow: Order partially filled and a crafting job was scheduled for the
--              rest.
--   - Green: Order fully filled.
function ScanWorkRequests(monitor, bridge, storage, colony)
    local requests = {}

    for _, request in pairs(colony.getRequests()) do
        local name = request.name
        local item = request.items[1].name
        local target = request.target
        local desc = request.desc
        local needed = request.count

        local target_words = {}
        local target_length = 0
        local target_name
        for word in target:gmatch("%S+") do
            table.insert(target_words, word)
            target_length = target_length + 1
        end

        if target_length >= 3 then target_name = target_words[target_length-2] .. " " .. target_words[target_length]
        else target_name = target end

        local target_type = ""
        local target_count = 1
        repeat
            if target_type ~= "" then target_type = target_type .. " " end
            target_type = target_type .. target_words[target_count]
            target_count = target_count + 1
        until target_count > target_length - 3

        -- Items like armor or weapons are not strictly bound to one possible
        -- request. For example, a Tier 2 Guard Tower will ask you to provide
        -- a Stone Sword, but a Wooden one will also work.
        -- Ideally, we want to provide the best item for the given tier and
        -- if not possible, give it the next "worst" option
        -- It works by checking from the worst item and saving the one that
        -- either yyou ahve in storage or can craft until the tier that the
        -- guard asked. That is not even the "best" solution, as you can give
        -- better items that are not said within the GUI but can be explored
        -- through the request system. so it's a nice balance
        local display_name
        if string.find(desc, "with") then
            local level = "Any Level"
            if string.find(desc, "with maximal level: Leather") then level = "Leather" end
            if string.find(desc, "with maximal level: Gold") then level = "Gold" end
            if string.find(desc, "with maximal level: Chain") then level = "Chain" end
            if string.find(desc, "with maximal level: Wood or Gold") then level = "Wood or Gold" end
            if string.find(desc, "with maximal level: Stone") then level = "Stone" end
            if string.find(desc, "with maximal level: Iron") then level = "Iron" end
            if string.find(desc, "with maximal level: Diamond") then level = "Diamond" end

            local max_item
            local last_item

            for _, item in pairs(request.items) do
                if (bridge.getItem({name=item.name}) or {count = 0}).count > 0 then
                    max_item = item
                end

                if bridge.isItemCraftable({name=item.name}) then
                    max_item = item
                end

                last_item = item

                if string.find(item.displayName, level) then
                    break
                end
            end


            local best_item

            if max_item ~= nil then
                best_item = max_item
            else
                best_item = last_item
            end
            display_name = string.gsub(best_item.displayName, "[%[%]]", "")
            item = best_item.name

        end

        local color

        local provided = (bridge.getItem({name=item}) or {count = 0}).count

        if provided >= needed then
            color = colors.green
            provided = bridge.exportItem({name=item, count=needed}, storage)
        elseif bridge.isItemCrafting({name=item}) then
            color = colors.yellow
        elseif bridge.isItemCraftable({name=item}) and bridge.craftItem({name=item, count=needed}) then
            color = colors.orange
        else
            color = colors.red
        end

        if string.find(desc, "with") then
            table.insert(requests, {
                name     = needed .. " " .. display_name,
                target   = target_type .. " " .. target_name,
                needed   = needed,
                provided = provided,
                color    = color
            })

        elseif string.find(target, "Builder") then
            table.insert(requests, {
                name     = string.gsub(name, "^%d%-", ""),
                item     = item,
                target   = target_name,
                needed   = needed,
                provided = provided,
                color    = color
            })

        else
            local new_target = target_type .. " " .. target_name
            if target_length < 3 then
                new_target = target
            end

            table.insert(requests, {
                name     = string.gsub(name, "^%d%-", ""),
                target   = new_target,
                needed   = needed,
                provided = provided,
                color    = color
            })
        end
    end

    table.sort(requests, function(left, right)
        return left.target < right.target
    end)

    monitor.clear()

    local row = 3
    if #requests == 0 then
        MonPrintRow(monitor, row, "center", "No Open Requests")
    else
        row = MonPrintRow(monitor, row, "center", "REQUESTS")

        local padding = 0

        for _, line in pairs(requests) do
            local number = string.match(line.needed, "^%d+")
            if number and #number > padding then
                padding = #number
            end
        end

        for _, request in pairs(requests) do
            local number, rest = string.match(request.name, "^(%d+)%s+(.*)")
            number = number or ""
            MonPrintRow(monitor, row, "left", string.format("%s" .. string.rep(" ", padding - #number) .. " %s", number, rest), request.color)
            MonPrintRow(monitor, row, "right", " " .. request.target, request.color)
            row = row + 1
        end
    end
end
function Main()

    local monitor = peripheral.find("monitor")
    if not monitor then error("Monitor not found.") end
    monitor.setTextScale(0.5)
    monitor.clear()
    monitor.setTextColor(colors.white)
    monitor.setCursorPos(1, 1)
    monitor.setCursorBlink(false)
    print("Monitor initialized.")

    local bridge = peripheral.find("meBridge")
    if not bridge then error("ME Bridge not found.") end
    print("ME Bridge initialized.")

    local colony = peripheral.find("colonyIntegrator")
    if not colony then error("Colony Integrator not found.") end
    if not colony.isInColony then error("Colony Integrator is not in a colony.") end
    print("Colony Integrator initialized.")

    -- This can be changed to suit your needs. Remember that this will position
    -- will be relative to the ME bridge
    local storage = "down"
    print("Storage initialized.")

    local time_between_runs = 1
    local current_run = time_between_runs
    ScanWorkRequests(monitor, bridge, storage, colony)
    DisplayTimer(monitor, current_run)
    local TIMER = os.startTimer(1)

    while true do
        local e = {os.pullEvent()}
        if e[1] == "timer" and e[2] == TIMER then
            local now = os.time()
            if now >= 5 and now < 19.5 then
                current_run = current_run - 1
                if current_run <= 0 then
                    ScanWorkRequests(monitor, bridge, storage, colony)
                    current_run = time_between_runs
                end
            end
            DisplayTimer(monitor, current_run)
            TIMER = os.startTimer(1)
        elseif e[1] == "monitor_touch" then
            os.cancelTimer(TIMER)
            ScanWorkRequests(monitor, bridge, storage, colony)
            current_run = time_between_runs
            DisplayTimer(monitor, current_run)
            TIMER = os.startTimer(1)
        end
    end

end

Main()