local b = require 'map_gen.shared.builders'
local math = require 'utils.math'
local table = require 'utils.table'
local RS = require 'map_gen.shared.redmew_surface'
local MGSP = require 'resources.map_gen_settings'
local ScenarioInfo = require 'features.gui.info'

local degrees = math.degrees

-- change these to change the pattern and scale
local seed1 = 12345
local seed2 = 56789
local fish_scale = 1.75

RS.set_map_gen_settings(
    {
        MGSP.ore_oil_none,
        MGSP.peaceful_mode_on,
        MGSP.water_none
    }
)

ScenarioInfo.set_map_name('Fish Islands')
ScenarioInfo.set_map_description(
[[
What a lovely day for a fishing trip.
I hope we brought enough Soy Sauce!
]]
)
ScenarioInfo.set_map_extra_info(
[[
Fish islands are spread around in the water

The fishes heads contains high amount of resources

Some one placed worms around the lit of our soy sauce
Exterminate them so we can enjoy our fish with some delicious
soy sauce! (Not sponsered by Kikkoman)

(Kikkoman is a registered trademark under Kikkoman Corporation, Japan)
]]
)


local value = b.exponential_value

local pic = require 'map_gen.data.presets.fish'
pic = b.decompress(pic)
local fish = b.picture(pic)

fish = b.change_tile(fish, 'water', false)
fish = b.scale(fish, fish_scale)

local ores = {
    {resource_type = 'iron-ore', value = value(75, 0.25, 1.15)},
    {resource_type = 'copper-ore', value = value(65, 0.2, 1.15)},
    {resource_type = 'stone', value = value(50, 0.2, 1.1)},
    {resource_type = 'coal', value = value(50, 0.15, 1.1)},
    {resource_type = 'uranium-ore', value = value(10, 0.1, 1.075)},
    {resource_type = 'crude-oil', value = value(25000, 25, 1.15)}
}

local cap = b.translate(b.rectangle(48 * fish_scale, 48 * fish_scale), 100 * fish_scale, 0)
local rich_tile = b.rectangle(3, 3)
rich_tile = b.translate(rich_tile, 100 * fish_scale, 0)
local function rich_value()
    return 1111111
end

local iron =
    b.any {
    b.resource(rich_tile, ores[1].resource_type, rich_value),
    b.resource(cap, ores[1].resource_type, ores[1].value)
}
local copper =
    b.any {
    b.resource(rich_tile, ores[2].resource_type, rich_value),
    b.resource(cap, ores[2].resource_type, ores[2].value)
}
local stone =
    b.any {
    b.resource(rich_tile, ores[3].resource_type, rich_value),
    b.resource(cap, ores[3].resource_type, ores[3].value)
}
local coal =
    b.any {
    b.resource(rich_tile, ores[4].resource_type, rich_value),
    b.resource(cap, ores[4].resource_type, ores[4].value)
}
local uranium =
    b.any {
    b.resource(rich_tile, ores[5].resource_type, rich_value),
    b.resource(cap, ores[5].resource_type, ores[5].value)
}
local oil = b.resource(b.throttle_world_xy(cap, 1, 8, 1, 8), ores[6].resource_type, ores[6].value)

local worm_names = {
    'small-worm-turret',
    'medium-worm-turret',
    'big-worm-turret'
}

local max_worm_chance = 1 / 64
local worm_chance_factor = 1 / 256

local function worms(x, y, world)
    if not cap(x, y) then
        return nil
    end
    local wx, wy = world.x, world.y
    local d = math.sqrt(wx * wx + wy * wy)

    local worm_chance = d - 64

    if worm_chance > 0 then
        worm_chance = worm_chance * worm_chance_factor
        worm_chance = math.min(worm_chance, max_worm_chance)

        if math.random() < worm_chance then
            if d < 512 then
                return {name = 'small-worm-turret'}
            else
                local max_lvl
                local min_lvl
                if d < 1024 then
                    max_lvl = 2
                    min_lvl = 1
                else
                    max_lvl = 3
                    min_lvl = 2
                end
                local lvl = math.random() ^ (512 / d) * max_lvl
                lvl = math.ceil(lvl)
                lvl = math.clamp(lvl, min_lvl, 3)
                return {name = worm_names[lvl]}
            end
        end
    end
end

local iron_fish = b.apply_entities(fish, {iron, worms})
local copper_fish = b.apply_entities(fish, {copper, worms})
local stone_fish = b.apply_entities(fish, {stone, worms})
local coal_fish = b.apply_entities(fish, {coal, worms})
local uranium_fish = b.apply_entities(fish, {uranium, worms})
local oil_fish = b.apply_entities(fish, {oil, worms})

local fishes = {
    {iron_fish, 24},
    {copper_fish, 12},
    {stone_fish, 6},
    {coal_fish, 6},
    {uranium_fish, 1},
    {oil_fish, 4}
}

local Random = require 'map_gen.shared.random'
local random = Random.new(seed1, seed2)

local total_weights = {}
local t = 0
for _, v in pairs(fishes) do
    t = t + v[2]
    table.insert(total_weights, t)
end

local p_cols = 50
local p_rows = 50
local pattern = {}

for c = 1, p_cols do
    local row = {}
    table.insert(pattern, row)
    for r = 1, p_rows do
        if (r <= 1) and (c <= 2 or c > p_cols - 1) then
            table.insert(row, b.empty_shape)
        else
            local i = random:next_int(1, t)

            local index = table.binary_search(total_weights, i)
            if (index < 0) then
                index = bit32.bnot(index)
            end

            local shape = fishes[index][1]

            local x = random:next_int(-48, 48)
            local y = random:next_int(-48, 48)
            local angle = random:next() * math.tau

            shape = b.rotate(shape, angle)
            shape = b.translate(shape, x, y)

            table.insert(row, shape)
        end
    end
end

local map = b.grid_pattern_full_overlap(pattern, p_cols, p_rows, 215 * fish_scale, 215 * fish_scale)

local start = require 'map_gen.data.presets.soy_sauce'
start = b.decompress(start)
start = b.picture(start)
start = b.change_tile(start, 'water', false)

pic = require 'map_gen.data.presets.fish_black_and_white'
pic = b.decompress(pic)
local fish_bw = b.picture(pic)
fish_bw = b.scale(fish_bw, 0.25, 0.25)

local start_copper = b.rotate(fish_bw, degrees(180))
local start_stone = b.rotate(fish_bw, degrees(90))
local start_coal = b.rotate(fish_bw, degrees(-90))

local start_iron = b.translate(fish_bw, -32, 0)
start_copper = b.translate(start_copper, 32, 0)
start_stone = b.translate(start_stone, 0, 32)
start_coal = b.translate(start_coal, 0, -32)

start_iron = b.resource(start_iron, ores[1].resource_type, value(1000, 0.5, 1))
start_copper = b.resource(start_copper, ores[2].resource_type, value(800, 0.5, 1))
start_stone = b.resource(start_stone, ores[3].resource_type, value(600, 0.5, 1))
start_coal = b.resource(start_coal, ores[4].resource_type, value(600, 0.5, 1))

local start_oil = b.translate(b.rectangle(1, 1), -44, 74)
start_oil = b.resource(start_oil, ores[6].resource_type, value(100000, 0, 1))

local worms_area = b.rectangle(150, 72)
worms_area = b.translate(worms_area, 0, -210)

local function worms_top(x, y, world)
    if worms_area(x, y) then
        local entities = world.surface.find_entities {{world.x, world.y}, {world.x + 1, world.y + 1}}
        for _, e in ipairs(entities) do
            e.destroy()
        end
        return {name = 'big-worm-turret'}
    end
end

--worms = b.entity(worms, 'big-worm-turret')

start = b.apply_entity(start, b.any {start_iron, start_copper, start_stone, start_coal, start_oil, worms_top})

map = b.if_else(start, map)

map = b.change_map_gen_collision_tile(map, 'water-tile', 'grass-1')

local sea = b.tile('water')
sea = b.fish(sea, 0.0025)

map = b.if_else(map, sea)

--map = b.scale(map, 2, 2)

--map = b.apply_entity(b.full_shape, iron)

return map