--luacheck: ignore
-- spooky forest -- by mewmew --

require 'modules.trees_randomly_die'
--require "modules.fish_respawner"
--global.fish_respawner_water_tiles_per_fish = 16

require 'modules.satellite_score'
require 'modules.explosives_are_explosive'
require 'modules.explosive_biters'
require 'modules.dynamic_landfill'
require 'modules.teleporting_worms'
require 'modules.splice_double'
require 'modules.biters_avoid_damage'
require 'modules.biters_double_damage'
require 'modules.spawners_contain_biters'
require 'modules.rocks_broken_paint_tiles'
require 'modules.rpg'
require 'modules.hunger'

local shapes = require 'utils.tools.shapes'
local event = require 'utils.event'
local map_functions = require 'utils.tools.map_functions'
local simplex_noise = require 'utils.simplex_noise'
simplex_noise = simplex_noise.d2

local math_random = math.random
local insert = table.insert
local uncover_radius = 8

local function shuffle(tbl)
    local size = #tbl
    for i = size, 1, -1 do
        local rand = math.random(size)
        tbl[i], tbl[rand] = tbl[rand], tbl[i]
    end
    return tbl
end

local worm_raffle_table = {
    [1] = {'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'small-worm-turret'},
    [2] = {'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'medium-worm-turret'},
    [3] = {'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'medium-worm-turret', 'medium-worm-turret'},
    [4] = {'small-worm-turret', 'small-worm-turret', 'small-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'medium-worm-turret'},
    [5] = {'small-worm-turret', 'small-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'big-worm-turret'},
    [6] = {'small-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'big-worm-turret'},
    [7] = {'medium-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'big-worm-turret', 'big-worm-turret'},
    [8] = {'medium-worm-turret', 'medium-worm-turret', 'medium-worm-turret', 'big-worm-turret', 'big-worm-turret', 'big-worm-turret'},
    [9] = {'medium-worm-turret', 'medium-worm-turret', 'big-worm-turret', 'big-worm-turret', 'big-worm-turret', 'big-worm-turret'},
    [10] = {'medium-worm-turret', 'big-worm-turret', 'big-worm-turret', 'big-worm-turret', 'big-worm-turret', 'big-worm-turret'}
}

local biters_in_the_trees = {
    [1] = {'small-biter', 'small-biter', 'small-biter', 'small-biter', 'small-spitter', 'small-spitter'},
    [2] = {'small-biter', 'small-biter', 'small-biter', 'small-spitter', 'small-spitter', 'medium-biter'},
    [3] = {'small-biter', 'small-biter', 'small-biter', 'small-biter', 'medium-biter', 'medium-spitter'},
    [4] = {'small-biter', 'small-biter', 'small-biter', 'medium-biter', 'medium-biter', 'medium-spitter'},
    [5] = {'small-biter', 'small-biter', 'medium-biter', 'medium-biter', 'medium-biter', 'medium-spitter'},
    [6] = {'small-biter', 'medium-biter', 'medium-biter', 'medium-biter', 'medium-biter', 'medium-spitter'},
    [7] = {'medium-biter', 'medium-biter', 'medium-biter', 'medium-biter', 'big-biter', 'medium-spitter'},
    [8] = {'medium-biter', 'medium-biter', 'medium-biter', 'medium-biter', 'big-biter', 'big-spitter'},
    [9] = {'medium-biter', 'medium-biter', 'medium-biter', 'big-biter', 'big-biter', 'big-spitter'},
    [10] = {'medium-biter', 'medium-biter', 'medium-biter', 'big-biter', 'big-biter', 'big-spitter'},
    [11] = {'medium-biter', 'medium-biter', 'big-biter', 'big-biter', 'big-biter', 'big-spitter'},
    [12] = {'medium-biter', 'big-biter', 'big-biter', 'big-biter', 'big-biter', 'big-spitter'},
    [13] = {'big-biter', 'big-biter', 'big-biter', 'big-biter', 'big-biter', 'big-spitter'},
    [14] = {'big-biter', 'big-biter', 'big-biter', 'big-biter', 'behemoth-biter', 'big-spitter'},
    [15] = {'big-biter', 'big-biter', 'big-biter', 'behemoth-biter', 'behemoth-biter', 'big-spitter'},
    [16] = {'big-biter', 'big-biter', 'big-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-spitter'},
    [17] = {'big-biter', 'big-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-spitter'},
    [18] = {'big-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-spitter'},
    [19] = {'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-spitter'},
    [20] = {'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-biter', 'behemoth-spitter', 'behemoth-spitter'}
}

local rock_raffle = {'sand-rock-big', 'sand-rock-big', 'rock-big', 'rock-big', 'rock-big', 'rock-big', 'rock-big', 'rock-big', 'rock-big', 'rock-big', 'rock-huge'}

local function secret_shop(pos, surface)
    local secret_market_items = {
        {price = {{'raw-fish', math_random(75, 125)}}, offer = {type = 'give-item', item = 'combat-shotgun'}},
        {price = {{'raw-fish', math_random(40, 60)}}, offer = {type = 'give-item', item = 'rocket-launcher'}},
        {price = {{'raw-fish', math_random(1, 2)}}, offer = {type = 'give-item', item = 'piercing-rounds-magazine'}},
        {price = {{'raw-fish', math_random(3, 6)}}, offer = {type = 'give-item', item = 'uranium-rounds-magazine'}},
        {price = {{'raw-fish', math_random(1, 4)}}, offer = {type = 'give-item', item = 'piercing-shotgun-shell'}},
        {price = {{'raw-fish', math_random(1, 2)}}, offer = {type = 'give-item', item = 'rocket'}},
        {price = {{'raw-fish', math_random(2, 3)}}, offer = {type = 'give-item', item = 'explosive-rocket'}},
        {price = {{'raw-fish', math_random(1, 2)}}, offer = {type = 'give-item', item = 'explosive-cannon-shell'}},
        {price = {{'raw-fish', math_random(3, 6)}}, offer = {type = 'give-item', item = 'explosive-uranium-cannon-shell'}},
        {price = {{'raw-fish', math_random(4, 8)}}, offer = {type = 'give-item', item = 'cluster-grenade'}},
        {price = {{'raw-fish', math_random(1, 2)}}, offer = {type = 'give-item', item = 'land-mine'}},
        {price = {{'raw-fish', math_random(25, 50)}}, offer = {type = 'give-item', item = 'heavy-armor'}},
        {price = {{'raw-fish', math_random(125, 250)}}, offer = {type = 'give-item', item = 'modular-armor'}},
        {price = {{'raw-fish', math_random(300, 600)}}, offer = {type = 'give-item', item = 'power-armor'}},
        {price = {{'raw-fish', math_random(300, 600)}}, offer = {type = 'give-item', item = 'fusion-reactor-equipment'}},
        {price = {{'raw-fish', math_random(20, 40)}}, offer = {type = 'give-item', item = 'battery-equipment'}},
        {price = {{'raw-fish', math_random(100, 150)}}, offer = {type = 'give-item', item = 'belt-immunity-equipment'}},
        {price = {{'raw-fish', math_random(40, 80)}}, offer = {type = 'give-item', item = 'night-vision-equipment'}},
        {price = {{'raw-fish', math_random(60, 120)}}, offer = {type = 'give-item', item = 'exoskeleton-equipment'}},
        {price = {{'raw-fish', math_random(60, 120)}}, offer = {type = 'give-item', item = 'personal-roboport-equipment'}},
        {price = {{'raw-fish', math_random(3, 9)}}, offer = {type = 'give-item', item = 'construction-robot'}},
        {price = {{'raw-fish', math_random(100, 200)}}, offer = {type = 'give-item', item = 'energy-shield-equipment'}},
        {price = {{'raw-fish', math_random(200, 400)}}, offer = {type = 'give-item', item = 'personal-laser-defense-equipment'}},
        {price = {{'raw-fish', math_random(30, 60)}}, offer = {type = 'give-item', item = 'loader'}},
        {price = {{'raw-fish', math_random(50, 80)}}, offer = {type = 'give-item', item = 'fast-loader'}},
        {price = {{'raw-fish', math_random(70, 100)}}, offer = {type = 'give-item', item = 'express-loader'}},
        {price = {{'raw-fish', math_random(30, 60)}}, offer = {type = 'give-item', item = 'locomotive'}},
        {price = {{'raw-fish', math_random(15, 35)}}, offer = {type = 'give-item', item = 'cargo-wagon'}},
        {price = {{'raw-fish', math_random(1, 4)}}, offer = {type = 'give-item', item = 'grenade'}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'rail', count = 4}},
        --	{price = {{"raw-fish", 1}}, offer = {type = 'give-item', item = 'rail-signal', count = 2}},
        --	{price = {{"raw-fish", 1}}, offer = {type = 'give-item', item = 'rail-chain-signal', count = 2}},
        {price = {{'raw-fish', 5}}, offer = {type = 'give-item', item = 'train-stop'}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'small-lamp'}},
        {price = {{'raw-fish', 2}}, offer = {type = 'give-item', item = 'firearm-magazine'}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'wood', count = math_random(25, 75)}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'iron-ore', count = math_random(25, 75)}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'copper-ore', count = math_random(25, 75)}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'stone', count = math_random(25, 75)}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'coal', count = math_random(25, 75)}},
        {price = {{'raw-fish', 1}}, offer = {type = 'give-item', item = 'uranium-ore', count = math_random(25, 75)}}
    }
    secret_market_items = shuffle(secret_market_items)

    local market = surface.create_entity {name = 'market', position = pos}
    market.destructible = false

    for i = 1, math.random(4, 8), 1 do
        market.add_market_item(secret_market_items[i])
    end
end

local function spawn_biter(surface, position)
    local e = math.ceil(game.forces.enemy.evolution_factor * 20)
    if e < 1 then
        e = 1
    end
    if e > 20 then
        e = 20
    end
    local biter = biters_in_the_trees[e][math_random(1, #biters_in_the_trees[e])]
    local p = surface.find_non_colliding_position(biter, position, 16, 0.5)
    if not p then
        return
    end
    surface.create_entity {name = biter, position = p}
end

local function get_noise(name, pos)
    local seed = game.surfaces[1].map_gen_settings.seed
    local noise = {}
    local noise_seed_add = 25000
    if name == 'water' then
        noise[1] = simplex_noise(pos.x * 0.02, pos.y * 0.02, seed)
        seed = seed + noise_seed_add
        noise[2] = simplex_noise(pos.x * 0.1, pos.y * 0.1, seed)
        seed = seed + noise_seed_add
        local noise = noise[1] + noise[2] * 0.2
        return noise
    end
    seed = seed + noise_seed_add
    if name == 'grass' then
        --noise[1] = simplex_noise(pos.x * 0.1, pos.y * 0.1, seed)
        noise[1] = simplex_noise(pos.x * 0.08, pos.y * 0.08, seed)
        seed = seed + noise_seed_add
        local noise = noise[1]
        return noise
    end
    seed = seed + noise_seed_add
    if name == 'trees' then
        noise[1] = simplex_noise(pos.x * 0.045, pos.y * 0.045, seed)
        seed = seed + noise_seed_add
        local noise = noise[1]
        return noise
    end
    seed = seed + noise_seed_add
    if name == 'spawners' then
        noise[1] = simplex_noise(pos.x * 0.02, pos.y * 0.02, seed)
        seed = seed + noise_seed_add
        local noise = noise[1]
        return noise
    end
end

local function get_entity(position)
    local noise = get_noise('trees', position)
    local entity_name = false
    if noise > 0 then
        if math_random(1, 3) ~= 1 then
            entity_name = 'tree-04'
            if math_random(1, 7) == 1 then
                entity_name = 'dead-tree-desert'
            end
            if noise > 0.6 then
                entity_name = rock_raffle[math_random(1, #rock_raffle)]
                if math_random(1, 24) == 1 then
                    if position.x > 32 or position.x < -32 or position.y > 32 or position.y < -32 then
                        local e = math.ceil(game.forces.enemy.evolution_factor * 10)
                        if e < 1 then
                            e = 1
                        end
                        entity_name = worm_raffle_table[e][math_random(1, #worm_raffle_table[e])]
                    end
                end
            end
        end
    else
        if math_random(1, 2048) == 1 then
            entity_name = 'market'
        end

        if math_random(1, 12) == 1 then
            local noise_spawners = get_noise('spawners', position)
            if noise_spawners > 0.25 and position.x ^ 2 + position.y ^ 2 > 3000 then
                entity_name = 'biter-spawner'
                if math_random(1, 5) == 1 then
                    entity_name = 'spitter-spawner'
                end
            end
        end
    end
    return entity_name
end

local function get_noise_tile(position)
    local noise = get_noise('grass', position)
    local tile_name

    if noise > 0 then
        tile_name = 'grass-1'
        if noise > 0.5 then
            tile_name = 'dirt-5'
        end
    else
        tile_name = 'grass-2'
    end

    local noise = get_noise('water', position)
    if noise > 0.71 then
        tile_name = 'water'
        if noise > 0.78 then
            tile_name = 'deepwater'
        end
    end

    if noise < -0.76 then
        tile_name = 'water-green'
    end

    return tile_name
end

local function get_chunk_position(position)
    local chunk_position = {}
    position.x = math.floor(position.x, 0)
    position.y = math.floor(position.y, 0)
    for x = 0, 31, 1 do
        if (position.x - x) % 32 == 0 then
            chunk_position.x = (position.x - x) / 32
        end
    end
    for y = 0, 31, 1 do
        if (position.y - y) % 32 == 0 then
            chunk_position.y = (position.y - y) / 32
        end
    end
    return chunk_position
end

local function regenerate_decoratives_for_chunk(surface, position)
    local chunk = get_chunk_position(position)
    surface.destroy_decoratives({area = {{chunk.x * 32, chunk.y * 32}, {chunk.x * 32 + 32, chunk.y * 32 + 32}}})
    local decorative_names = {}
    for k, v in pairs(game.decorative_prototypes) do
        if v.autoplace_specification then
            decorative_names[#decorative_names + 1] = k
        end
    end
    surface.regenerate_decorative(decorative_names, {chunk})
    surface.regenerate_decorative(decorative_names, {chunk})
    surface.regenerate_decorative(decorative_names, {chunk})
end

local function uncover_map(surface, position, radius_min, radius_max)
    local circles = shapes.circles
    local tiles = {}
    local fishes = {}
    local regenerate_decoratives = false
    for r = radius_min, radius_max, 1 do
        for _, position_modifier in pairs(circles[r]) do
            local pos = {x = position.x + position_modifier.x, y = position.y + position_modifier.y}
            if surface.get_tile(pos).name == 'out-of-map' then
                regenerate_decoratives = true
                local tile_name = get_noise_tile(pos)
                insert(tiles, {name = tile_name, position = pos})
                if tile_name == 'water' or tile_name == 'deepwater' or tile_name == 'water-green' then
                    if math_random(1, 24) == 1 then
                        insert(fishes, pos)
                    end
                else
                    local entity = get_entity(pos)
                    if entity then
                        if entity == 'market' then
                            local area = {{pos.x - 64, pos.y - 64}, {pos.x + 64, pos.y + 64}}
                            if surface.count_entities_filtered({name = 'market', area = area}) == 0 then
                                secret_shop(pos, surface)
                            end
                        else
                            if entity == 'biter-spawner' or entity == 'spitter-spawner' then
                                local area = {{pos.x - 4, pos.y - 4}, {pos.x + 4, pos.y + 4}}
                                if surface.count_entities_filtered({name = 'biter-spawner', area = area}) == 0 then
                                    surface.create_entity({name = entity, position = pos})
                                end
                            else
                                surface.create_entity({name = entity, position = pos})
                            end
                        end
                    end
                end
            end
        end
    end
    if #tiles > 0 then
        surface.set_tiles(tiles, true)
    end
    for _, fish in pairs(fishes) do
        surface.create_entity({name = 'fish', position = fish})
    end
    if regenerate_decoratives then
        if math_random(1, 3) == 1 then
            regenerate_decoratives_for_chunk(surface, position)
        end
    end
end

local function uncover_map_for_player(player)
    local position = player.position
    local surface = player.surface
    local circles = shapes.circles
    local tiles = {}
    local fishes = {}
    local uncover_map_schedule = {}
    local regenerate_decoratives = false
    for r = uncover_radius - 1, uncover_radius, 1 do
        for _, position_modifier in pairs(circles[r]) do
            local pos = {x = position.x + position_modifier.x, y = position.y + position_modifier.y}
            if surface.get_tile(pos).name == 'out-of-map' then
                regenerate_decoratives = true
                local tile_name = get_noise_tile(pos)
                insert(tiles, {name = tile_name, position = pos})
                if tile_name == 'water' or tile_name == 'deepwater' or tile_name == 'water-green' then
                    if math_random(1, 24) == 1 then
                        insert(fishes, pos)
                    end
                else
                    local entity = get_entity(pos)
                    if entity then
                        if entity == 'market' then
                            local area = {{pos.x - 64, pos.y - 64}, {pos.x + 64, pos.y + 64}}
                            if surface.count_entities_filtered({name = 'market', area = area}) == 0 then
                                secret_shop(pos, surface)
                            end
                        else
                            if entity == 'biter-spawner' or entity == 'spitter-spawner' then
                                local area = {{pos.x - 4, pos.y - 4}, {pos.x + 4, pos.y + 4}}
                                if surface.count_entities_filtered({name = 'biter-spawner', area = area}) == 0 then
                                    surface.create_entity({name = entity, position = pos})
                                end
                            else
                                surface.create_entity({name = entity, position = pos})
                            end
                        end
                        if entity == 'biter-spawner' or entity == 'spitter-spawner' then
                            insert(uncover_map_schedule, {x = pos.x, y = pos.y})
                        end
                    end
                end
            end
        end
    end

    if #tiles > 0 then
        surface.set_tiles(tiles, true)
    end

    for _, pos in pairs(uncover_map_schedule) do
        uncover_map(surface, pos, 1, 16)
    end
    for _, fish in pairs(fishes) do
        surface.create_entity({name = 'fish', position = fish})
    end

    if regenerate_decoratives then
        if math_random(1, 3) == 1 then
            regenerate_decoratives_for_chunk(surface, position)
        end
    end
end

local ore_spill_raffle = {'iron-ore', 'iron-ore', 'iron-ore', 'iron-ore', 'copper-ore', 'copper-ore', 'copper-ore', 'coal', 'coal'}
local ore_spawn_raffle = {
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'iron-ore',
    'copper-ore',
    'copper-ore',
    'copper-ore',
    'copper-ore',
    'copper-ore',
    'copper-ore',
    'copper-ore',
    'coal',
    'coal',
    'coal',
    'coal',
    'coal',
    'stone',
    'stone',
    'stone',
    'uranium-ore',
    'crude-oil'
}

local function on_entity_died(event)
    if not event.entity.valid then
        return
    end
    local surface = event.entity.surface

    if event.entity.name == 'biter-spawner' or event.entity.name == 'spitter-spawner' then
        if math_random(1, 2) ~= 1 then
            local name = ore_spawn_raffle[math.random(1, #ore_spawn_raffle)]
            local pos = {x = event.entity.position.x, y = event.entity.position.y}
            local amount_modifier = math.ceil(1 + game.forces.enemy.evolution_factor * 10)
            local size_modifier = math.floor(game.forces.enemy.evolution_factor * 4)
            if name == 'crude-oil' then
                map_functions.draw_oil_circle(pos, name, surface, 4, math.ceil(100000 * amount_modifier))
            else
                map_functions.draw_smoothed_out_ore_circle(pos, name, surface, 6 + size_modifier, math.ceil(500 * amount_modifier))
            end
        end
    end

    if event.entity.type == 'unit' and math_random(1, 8) == 1 then
        surface.spill_item_stack(event.entity.position, {name = 'raw-fish', count = 1}, true)
    end

    if event.entity.type == 'tree' then
        spawn_biter(event.entity.surface, event.entity.position)
    end
end

local function on_player_joined_game(event)
    local player = game.players[event.player_index]

    if not global.spooky_forest_init_done then
        local map_gen_settings = {}
        map_gen_settings.water = 'small'
        map_gen_settings.cliff_settings = {cliff_elevation_interval = 22, cliff_elevation_0 = 22}
        map_gen_settings.autoplace_controls = {
            ['coal'] = {frequency = 'none', size = 'none', richness = 'none'},
            ['stone'] = {frequency = 'none', size = 'none', richness = 'none'},
            ['copper-ore'] = {frequency = 'none', size = 'none', richness = 'none'},
            ['iron-ore'] = {frequency = 'none', size = 'none', richness = 'none'},
            ['crude-oil'] = {frequency = 'none', size = 'none', richness = 'none'},
            ['trees'] = {frequency = 'none', size = 'none', richness = 'none'},
            ['enemy-base'] = {frequency = 'none', size = 'none', richness = 'none'}
        }
        game.create_surface('spooky_forest', map_gen_settings)
        local surface = game.surfaces['spooky_forest']
        surface.daytime = 0.5
        surface.freeze_daytime = 1
        game.forces['player'].set_spawn_position({0, 0}, surface)

        game.map_settings.enemy_expansion.enabled = true
        game.map_settings.enemy_evolution.destroy_factor = 0.0025
        game.map_settings.enemy_evolution.time_factor = 0
        game.map_settings.enemy_evolution.pollution_factor = 0

        local turret_positions = {{6, 6}, {-5, -5}, {-5, 6}, {6, -5}}
        for _, pos in pairs(turret_positions) do
            local turret = surface.create_entity({name = 'gun-turret', position = pos, force = 'player'})
            turret.insert({name = 'firearm-magazine', count = 64})
        end

        local radius = 320
        game.forces.player.chart(surface, {{x = -1 * radius, y = -1 * radius}, {x = radius, y = radius}})

        global.spooky_forest_init_done = true
    end

    if player.online_time < 1 then
        player.insert({name = 'submachine-gun', count = 1})
        player.insert({name = 'iron-plate', count = 64})
        player.insert({name = 'grenade', count = 3})
        player.insert({name = 'raw-fish', count = 5})
        player.insert({name = 'land-mine', count = 2})
        player.insert({name = 'light-armor', count = 1})
        player.insert({name = 'firearm-magazine', count = 64})
    end

    local surface = game.surfaces['spooky_forest']
    if player.online_time < 2 and surface.is_chunk_generated({0, 0}) then
        player.teleport(surface.find_non_colliding_position('character', {0, 0}, 50, 1), 'spooky_forest')
    else
        if player.online_time < 2 then
            player.teleport({0, 0}, 'spooky_forest')
        end
    end
end

local function on_player_changed_position(event)
    local player = game.players[event.player_index]
    uncover_map_for_player(player)
end

local function generate_spawn_area(position_left_top)
    if position_left_top.x > 32 then
        return
    end
    if position_left_top.y > 32 then
        return
    end
    if position_left_top.x < -32 then
        return
    end
    if position_left_top.y < -32 then
        return
    end

    local surface = game.surfaces['spooky_forest']
    local entities = {}
    local tiles = {}

    for x = 0, 31, 1 do
        for y = 0, 31, 1 do
            local tile_to_insert = false
            local pos = {x = position_left_top.x + x, y = position_left_top.y + y}
            if pos.x > -9 and pos.x < 9 and pos.y > -9 and pos.y < 9 then
                tile_to_insert = get_noise_tile(pos)
                --if math_random(1, 4) == 1 then
                tile_to_insert = 'stone-path'
                --end
                if pos.x <= -7 or pos.x >= 7 or pos.y <= -7 or pos.y >= 7 then
                    if math_random(1, 3) ~= 1 then
                        table.insert(entities, {name = 'stone-wall', position = {x = pos.x, y = pos.y}, force = 'player'})
                    end
                end
            end
            if tile_to_insert == 'water' or tile_to_insert == 'water-green' or tile_to_insert == 'deepwater' then
                tile_to_insert = 'grass-2'
            end
            if tile_to_insert then
                insert(tiles, {name = tile_to_insert, position = pos})
            end
        end
    end
    surface.set_tiles(tiles, true)

    for _, entity in pairs(entities) do
        surface.create_entity(entity)
    end
end

local function on_chunk_generated(event)
    if not game.surfaces['spooky_forest'] then
        return
    end
    local surface = game.surfaces['spooky_forest']
    if surface.name ~= event.surface.name then
        return
    end

    local position_left_top = event.area.left_top
    generate_spawn_area(position_left_top)

    local tiles = {}
    for x = 0, 31, 1 do
        for y = 0, 31, 1 do
            local tile_to_insert = 'out-of-map'
            local pos = {x = position_left_top.x + x, y = position_left_top.y + y}
            local tile_name = surface.get_tile(pos).name
            if tile_name ~= 'stone-path' then
                insert(tiles, {name = tile_to_insert, position = pos})
            end
        end
    end
    surface.set_tiles(tiles, true)
end

local function on_player_mined_entity(event)
    local player = game.players[event.player_index]
    if event.entity.type == 'tree' then
        if math_random(1, 96) == 1 then
            player.print('You anger the tree, it hits you with a low branch uppercut.', {r = 0.77, g = 0, b = 0})
            player.character.damage(25, 'enemy')
        end
        if math_random(1, 6) ~= 1 then
            return
        end
        spawn_biter(event.entity.surface, event.entity.position)
    end
end

local disabled_for_deconstruction = {
    ['fish'] = true,
    ['rock-huge'] = true,
    ['rock-big'] = true,
    ['sand-rock-big'] = true,
    ['tree-02'] = true,
    ['tree-04'] = true,
    ['dead-tree-desert'] = true
}

local function on_marked_for_deconstruction(event)
    if disabled_for_deconstruction[event.entity.name] then
        event.entity.cancel_deconstruction(game.players[event.player_index].force.name)
    end
end

local function on_research_finished(event)
    game.forces.player.recipes['flamethrower-turret'].enabled = false
end

local function break_some_random_trees(surface)
    local trees = {}
    local rocks = {}
    local chunks = {}

    for chunk in surface.get_chunks() do
        table.insert(chunks, {x = chunk.x, y = chunk.y})
    end
    chunks = shuffle(chunks)

    for _, chunk in pairs(chunks) do
        local area = {{chunk.x * 32, chunk.y * 32}, {chunk.x * 32 + 32, chunk.y * 32 + 32}}
        trees = surface.find_entities_filtered({type = 'tree', area = area})
        if #trees > 1 then
            break
        end
    end
    if #trees ~= 0 then
        trees = shuffle(trees)
        for i = 1, math_random(4 + math.floor(game.forces.enemy.evolution_factor * 8), 8 + math.floor(game.forces.enemy.evolution_factor * 16)), 1 do
            if not trees[i] then
                break
            end
            trees[i].die('enemy')
        end
    end

    for _, chunk in pairs(chunks) do
        local area = {{chunk.x * 32, chunk.y * 32}, {chunk.x * 32 + 32, chunk.y * 32 + 32}}
        rocks = surface.find_entities_filtered({type = 'simple-entity', area = area})
        if #rocks > 0 then
            break
        end
    end
    if not rocks[1] then
        return
    end
    local e = math.ceil(game.forces.enemy.evolution_factor * 10)
    if e < 1 then
        e = 1
    end
    entity_name = worm_raffle_table[e][math_random(1, #worm_raffle_table[e])]
    surface.create_entity({name = entity_name, position = rocks[1].position, force = 'enemy'})
    rocks[1].die('enemy')
end

local function on_tick()
    if game.tick % 4500 ~= 0 then
        return
    end
    if math_random(1, 4) ~= 1 then
        return
    end

    local surface = game.surfaces['spooky_forest']

    break_some_random_trees(surface)

    local biters = surface.find_entities_filtered({type = 'unit', force = 'enemy', limit = 32})
    if biters[1] then
        biters = shuffle(biters)
        for _, biter in pairs(biters) do
            biter.set_command({type = defines.command.attack_area, destination = {x = 0, y = 0}, radius = 64, distraction = defines.distraction.by_anything})
        end
    end
end

event.add(defines.events.on_tick, on_tick)
event.add(defines.events.on_research_finished, on_research_finished)
event.add(defines.events.on_marked_for_deconstruction, on_marked_for_deconstruction)
event.add(defines.events.on_player_mined_entity, on_player_mined_entity)
event.add(defines.events.on_entity_died, on_entity_died)
event.add(defines.events.on_chunk_generated, on_chunk_generated)
event.add(defines.events.on_player_changed_position, on_player_changed_position)
event.add(defines.events.on_player_joined_game, on_player_joined_game)

require 'modules.rocks_yield_ore'
global.rocks_yield_ore_base_amount = 100