--[[ Assist function in creating tutorial sequences --]]
function startTutorial()
    setDefaultSkybox("simulation")
    player = PlayerSpaceship():setFaction("Human Navy"):setTemplate("Phobos M3P")
    tutorial_setPlayerShip(player)

    tutorial_showMessage(_([[Welcome to the EmptyEpsilon tutorial.
Note that this tutorial is designed to give you a quick overview of the basic options for the game, but does not cover every single aspect.

Press next to continue...]]), true)
    tutorial_onNext(function()
        tutorial_list_index = 1
        startSequence(tutorial_list[tutorial_list_index])
    end)

end

function startSequence(sequence)
    current_sequence = sequence
    current_index = 1
    runNextSequenceStep()
end

function runNextSequenceStep()
    local data = current_sequence[current_index]
    current_index = current_index + 1
    if data == nil then
        tutorial_list_index = tutorial_list_index + 1
        if tutorial_list[tutorial_list_index] ~= nil then
            startSequence(tutorial_list[tutorial_list_index])
        else
            tutorial_finish()
        end
    elseif data["message"] ~= nil then
        tutorial_showMessage(data["message"], data["finish_check_function"] == nil)
        if data["finish_check_function"] == nil then
            update = nil
            tutorial_onNext(runNextSequenceStep)
        else
            update = function(delta)
                if data["finish_check_function"]() then
                    runNextSequenceStep()
                end
            end
            tutorial_onNext(nil)
        end
    elseif data["run_function"] ~= nil then
        local has_next_step = current_index <= #current_sequence
        data["run_function"]()
        if has_next_step then
            runNextSequenceStep()
        end
    end
end

function createSequence()
    return {}
end

function addToSequence(sequence, data, data2)
    if type(data) == "string" then
        if data2 == nil then
            table.insert(sequence, {message = data})
        else
            table.insert(sequence, {message = data, finish_check_function = data2})
        end
    elseif type(data) == "function" then
        table.insert(sequence, {run_function = data})
    end
end

function resetPlayerShip()
    player:setJumpDrive(false)
    player:setWarpDrive(false)
    player:setImpulseMaxSpeed(1)
    player:setRotationMaxSpeed(1)
    for idx, system in ipairs({"reactor", "beamweapons", "missilesystem", "maneuver", "impulse", "warp", "jumpdrive", "frontshield", "rearshield"}) do
        player:setSystemHealth(system, 1.0)
        player:setSystemHeat(system, 0.0)
        player:setSystemPower(system, 1.0)
        player:commandSetSystemPowerRequest(system, 1.0)
        player:setSystemCoolant(system, 0.0)
        player:commandSetSystemCoolantRequest(system, 0.0)
    end
    player:setPosition(0, 0)
    player:setRotation(0)
    player:commandImpulse(0)
    player:commandWarp(0)
    player:commandTargetRotation(0)
    player:commandSetShields(false)
    player:setWeaponStorageMax("homing", 0)
    player:setWeaponStorageMax("nuke", 0)
    player:setWeaponStorageMax("mine", 0)
    player:setWeaponStorageMax("emp", 0)
    player:setWeaponStorageMax("hvli", 0)
end
