/*  
 *  Simple Lua script to allow TASes of the game.
 *  Simply define the order of your inputs at the top of the file using either
 *  the input names or the shorthands below.
 *  The script will associate that order with the inputs in the following lines
 *  executing them frame by frame. 
 * 
 *  The script is capable of either loading a TAS/TAS_MAPXX-skinname.csv for 
 *  every level or a TAS/TAS_MAPXX.csv for every level or a TAS/TAS-skinname.csv
 *  or a TAS/TAS.csv for the entire run. The run has to be started manually as 
 *  the TAS is currently unable to navigate the menu.
 *
 *  Attack -> "Attack", "A"
 *  Spin -> "Spin", "S"
 *  Camera Left -> "CamLeft", "CL"
 *  Camera Right -> "CamRight", "CR"
 *  Toss Flag -> "TossFlag", "TF"
 *  Jump -> "Jump", "J"
 *  Fire -> "Fire", "FireNormal", "F"
 *  Custom 1 -> "Custom1", "C1"
 *  Custom 2 -> "Custom2", "C2"
 *  Custom 3 -> "Custom3", "C3"
 *  Strafe -> "X"
 *  Move Forwards/Backwards -> "Y"
 */

local file
local lines
local filename = ""

//https://stackoverflow.com/questions/1426954/split-string-in-lua
local function split (inputstr, sep)
    if sep == nil then
        sep = "%s"
    end
    local t={}
    for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
            table.insert(t, str)
    end
    return t
end


local mappings = {}
local analog = false
local function get_mappings()
    local first = lines()
    local buttons = split(first, ",")
    mappings = {}
    for i, b in pairs(buttons)
        if b == "S" or b == "Spin"
            mappings[BT_SPIN] = i
        elseif b == "A" or b == "Attack"
            mappings[BT_ATTACK] = i
        elseif b == "CL" or b == "CamLeft"
            mappings[BT_CAMLEFT] = i
        elseif b == "CR" or b == "CamRight"
            mappings[BT_CAMRIGHT] = i
        elseif b == "TF" or b == "TossFlag"
            mappings[BT_TOSSFLAG] = i
        elseif b == "J" or b == "Jump"
            mappings[BT_JUMP] = i
        elseif b == "F" or b == "Fire" or b == "FireNormal"
            mappings[BT_FIRENORMAL] = i
        elseif b == "C1" or b == "Custom1"
            mappings[BT_CUSTOM1] = i
        elseif b == "C2" or b == "Custom2"
            mappings[BT_CUSTOM2] = i
        elseif b == "C3" or b == "Custom3"
            mappings[BT_CUSTOM3] = i
        elseif b == "X" or b == "Y"
            mappings[b] = i
        end
    end
end

local done = false
local function frame()
    if not done and consoleplayer != nil
        local frame_input = lines()
        // Skip comments
        while frame_input != nil and frame_input:sub(1,1) == "#"
            frame_input = lines()
        end
        consoleplayer.cmd.buttons = 0
        if frame_input == nil
            print("End of TAS reached! GG!")
            done = true
            return nil
        end
        local inputs = split(frame_input, ",")
        for b,v in pairs(mappings)
            if type(b) == "string"
                if b == "Y"
                    consoleplayer.cmd.forwardmove = tonumber(inputs[v])
                elseif b == "X"
                    consoleplayer.cmd.sidemove = tonumber(inputs[v])
                end
            elseif inputs[v] == "1"
                consoleplayer.cmd.buttons = $ | b
            end
        end
    end
end

addHook("PreThinkFrame", frame)

local function on_map_changed(/*int*/ mapnum)
    local skinname = skins[consoleplayer.skin].name
    if filename != "client/TAS/TAS.csv" and filename != "client/TAS/TAS-"..skinname..".csv"
        if file != nil
            file:close()
        end
        local mapname = G_BuildMapName(mapnum)
        filename = "client/TAS/TAS_"..mapname.."-"..skinname..".csv"
        file = io.openlocal(filename, "r")
        if file == nil
            filename = "client/TAS/TAS_"..mapname..".csv"
            file = io.openlocal(filename, "r")
        end
        if file == nil
            filename = "client/TAS/TAS-"..skinname..".csv"
            file = io.openlocal(filename, "r")
        end
        if file == nil
            filename = "client/TAS/TAS.csv"
            file = io.openlocal(filename, "r")
        end
        if file == nil
            print("Unable to load TAS replay! Aborting!")
            done = true
            return nil
        end
        print("Loaded TAS replay "..filename.."!")
        lines = file:lines()
        get_mappings()
        done = false
    end
end

addHook("MapChange", on_map_changed)