ComfyFactorio/modules/scrap_towny_ffa/fish_reproduction.lua

local Public = {}
local math_random = math.random
local math_floor = math.floor

local Table = require 'modules.scrap_towny_ffa.table'

function Public.reproduce()
    local ffatable = Table.get_table()
    for _, town_center in pairs(ffatable.town_centers) do
        local surface = town_center.market.surface
        local position = town_center.market.position
        local fishes = surface.find_entities_filtered({name = 'fish', position = position, radius = 27})
        if #fishes == 0 then
            return
        end
        if #fishes >= 100 then
            return
        end
        -- pick a random fish
        local t = math_random(1, #fishes)
        local fish = fishes[t]
        -- test against all other fishes
        local guppy = false
        for i, f in pairs(fishes) do
            if i ~= t then
                if math_floor(fish.position.x) == math_floor(f.position.x) and math_floor(fish.position.y) == math_floor(f.position.y) then
                    guppy = true
                end
            end
        end
        if guppy == true then
            --log("fish spawn {" .. fish.position.x .. "," .. fish.position.y .. "}")
            surface.create_entity({name = 'water-splash', position = fish.position})
            surface.create_entity({name = 'fish', position = fish.position})
        end
    end
end

local function on_player_used_capsule(event)
    if event.item.name ~= 'raw-fish' then
        return
    end
    local player = game.players[event.player_index]
    local surface = player.surface
    local position = event.position
    local tile = player.surface.get_tile(position.x, position.y)

    -- return back some of the health if not healthy
    if player.character.health < 250 then
        player.surface.play_sound({path = 'utility/armor_insert', position = player.position, volume_modifier = 1})
        return
    end

    -- if using fish on water
    if tile.name == 'water' and tile.name == 'water-green' and tile.name == 'deepwater' and tile.name == 'deepwater-green' then
        -- get the count of fish in the water nearby and test if can be repopulated
        local fishes = surface.find_entities_filtered({name = 'fish', position = position, radius = 27})
        if #fishes < 12 then
            surface.create_entity({name = 'water-splash', position = position})
            surface.create_entity({name = 'fish', position = position})
            surface.play_sound({path = 'utility/achievement_unlocked', position = player.position, volume_modifier = 1})
            return
        end
    end
    -- otherwise return the fish and make no sound
    player.insert({name = 'raw-fish', count = 1})
end

local Event = require 'utils.event'
Event.add(defines.events.on_player_used_capsule, on_player_used_capsule)

return Public