local Event = require 'utils.event'
local Game = require 'utils.game'
local abs = math.abs

local allowed_entities = {
    ['transport-belt'] = true,
    ['fast-transport-belt'] = true,
    ['express-transport-belt'] = true,
    ['underground-belt'] = true,
    ['fast-underground-belt'] = true,
    ['express-underground-belt'] = true,
    ['splitter'] = true,
    ['fast-splitter'] = true,
    ['express-splitter'] = true,
    ['stone-wall'] = true,
    ['pipe'] = true,
    ['pipe-to-ground'] = true
}

local quadrant_bounds = {
    ['quadrant1'] = {x = 24, y = -24},
    ['quadrant2'] = {x = -24, y = -24},
    ['quadrant3'] = {x = -24, y = 24},
    ['quadrant4'] = {x = 24, y = 24}
}

local function on_built_entity(event)
    local entity = event.created_entity
    local force = entity.force

    if not entity or not entity.valid then
        return
    end

    local s_box = entity.selection_box

    local size_x = abs(s_box.left_top.x - s_box.right_bottom.x)
    local size_y = abs(s_box.left_top.y - s_box.right_bottom.y)
    local pos = {x = abs(entity.position.x) - (size_x / 2), y = abs(entity.position.y) - (size_y / 2)}
    local entity_pos = entity.position

    local within_range = false
    if string.find(force.name, 'quadrant') then
        local quadrant_bound = quadrant_bounds[force.name]
        if (force.name == 'quadrant1') then
            within_range = (entity_pos.x >= quadrant_bound.x and entity_pos.y <= quadrant_bound.y)
        elseif (force.name == 'quadrant2') then
            within_range = (entity_pos.x <= quadrant_bound.x and entity_pos.y <= quadrant_bound.y)
        elseif (force.name == 'quadrant3') then
            within_range = (entity_pos.x <= quadrant_bound.x and entity_pos.y >= quadrant_bound.y)
        elseif (force.name == 'quadrant4') then
            within_range = (entity_pos.x >= quadrant_bound.x and entity_pos.y >= quadrant_bound.y)
        end
    end

    if not (pos.x <= 23 or pos.y <= 23) and (within_range) then
        return
    end

    local name = entity.name

    local ghost = false
    if name == 'entity-ghost' then
        name = entity.ghost_name
        ghost = true
    end

    if name == 'tile-ghost' then
        return
    end

    if allowed_entities[name] and not (pos.x < 2 or pos.y < 2) and (within_range or (pos.x <= 23 or pos.y <= 23)) then
        return
    end

    local p = Game.get_player_by_index(event.player_index)
    if not p or not p.valid then
        return
    end

    entity.destroy()
    if not ghost then
        p.insert(event.stack)
    end
end

Event.add(defines.events.on_built_entity, on_built_entity)