local alpha_order = {'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm'}
local graphics_location = '__PHI-MB__/graphics/'

local items = {'assembling-machine', 'electric-furnace', 'chemical-plant', 'oil-refinery'}
local item_max = {
    ['assembling-machine'] = 5,
    ['electric-furnace'] = 3,
    ['chemical-plant'] = 3,
    ['oil-refinery'] = 3
}

-- entity
local function EE(source, tier)
    if source == 'assembling-machine' then
        local item = table.deepcopy(data.raw['assembling-machine']['assembling-machine-3'])
    elseif source == 'electric-furnace' then
        local item = table.deepcopy(data.raw['furnace']['electric-furnace'])
    elseif source == 'chemical-plant' then
        local item = table.deepcopy(data.raw['assembling-machine']['chemical-plant'])
    elseif source == 'oil-refinery' then
        local item = table.deepcopy(data.raw['assembling-machine']['oil-refinery'])
    else
        local item = table.deepcopy(data.raw[source][source])
    end
    
    item.name = source .. '-' .. tier
    item.minable.result = source .. '-' .. tier
    item.max_health = item.max_health * (2 ^ (tier - 1))
    item.crafting_speed = item.crafting_speed * (2 ^ (tier - 1))
    item.energy_usage = tonumber(string.match(item.energy_usage, '%d+')) * (2 ^ (tier - 1)) .. string.match(item.energy_usage, '%a')
    item.picture.layers[1].filename = graphics_location .. source .. '-e.png'
    item.picture.layers[1].hr_version.filename = graphics_location .. source ..'-eh.png'
    item.icon = graphics_location .. source .. '-i.png'
    item.icon_size = 64
    item.icon_mipmaps = 4

    if (tier <= item_max[source] - 1) then
        item.next_upgrade = source .. '-' .. (tier + 1)
    end
    
    data:extend({item})
end

-- item
local function EI(source, tier)
    local item = table.deepcopy(data.raw.item[source])
    item.name = source .. '-' .. tier
    item.place_result = source .. '-' .. tier
    item.icons = {{icon = graphics_location .. source .. '-i.png', icon_mipmaps = 4, icon_size = 64}}
    item.order = item.order .. tier
    data:extend({item})
end

-- recipe
local function ER(source, tier)
    local na = source

    if (tier >= 3) then
        na = na .. '-' .. (tier - 1)
    end

    data:extend({{
        type = 'recipe',
        name = source .. '-' .. tier,
        energy_required = 5,
        enabled = 'false',
        ingredients = {{na, 2}},
        result = source .. '-' .. tier,
    }})
end

-- technology
local function ET(tier)
    if (tier == 2) then
        local prereq = {'solar-energy', 'advanced-electronics', 'electric-energy-accumulators'}
    else
        local prereq = {'compound-energy-' .. (tier - 2)}
    end

    data:extend({{
        type = 'technology',
        name = 'compound-energy-' .. (tier - 1),
        icon_size = 256,
        icon = graphics_location .. 'solar-energy' .. '-t.png',
        effects = {
            {
                type = 'unlock-recipe',
                recipe = 'solar-panel-mk' .. tier
            },
            {
                type = 'unlock-recipe',
                recipe = 'accumulator-mk' .. tier
            }
        },
        prerequisites = prereq,
        unit = {
            count = 200 * (2 ^ (tier - 1)),
            ingredients = {
                {'automation-science-pack', 1},
                {'logistic-science-pack', 1}
            },
            time = 60
        },
        order = 'a-h-' .. alpha_order[tier + 1]
    }})
end

for i=1, 2, 1 do
    for j=2, 8, 1 do
        EE(items[i], j)
        EI(items[i], j)
        ER(items[i], j)
        ET(j)
    end
end