local noise = require("noise");
local tne = noise.to_noise_expression;
local resource_autoplace = require("prototypes.entity.demo-resource-autoplace");

local function autoplace_settings(name, order, coverage)
  return
  {
    order = order,
    control = name,
    sharpness = 15/16,
    richness_multiplier = 1500,
    richness_multiplier_distance_bonus = 20,
    richness_base = 10,
    coverage = coverage,
    peaks =
    {
      {
        noise_layer = name,
        noise_octaves_difference = -0.85,
        noise_persistence = 0.4
      }
    },
    starting_area_size = 5500 * coverage,
    starting_area_amount = 1600
  }
end

local function resource(resource_parameters, autoplace_parameters)
  if coverage == nil then coverage = 0.02 end

  return
  {
    type = "resource",
    name = resource_parameters.name,
    icon = "__base__/graphics/icons/" .. resource_parameters.name .. ".png",
    icon_size = 32,
    flags = {"placeable-neutral"},
    order="a-b-"..resource_parameters.order,
    tree_removal_probability = 0.8,
    tree_removal_max_distance = 32 * 32,
    minable =
    {
      mining_particle = resource_parameters.name .. "-particle",
      mining_time = resource_parameters.mining_time,
      result = resource_parameters.name
    },
    collision_box = {{ -0.1, -0.1}, {0.1, 0.1}},
    selection_box = {{ -0.5, -0.5}, {0.5, 0.5}},
    -- autoplace = autoplace_settings(name, order, coverage),
    autoplace = resource_autoplace.resource_autoplace_settings{
      name = resource_parameters.name,
      order = resource_parameters.order,
      base_density = autoplace_parameters.base_density,
      has_starting_area_placement = true,
      resource_index = resource_autoplace.get_next_resource_index(),
      regular_rq_factor_multiplier = autoplace_parameters.regular_rq_factor_multiplier;
      starting_rq_factor_multiplier = autoplace_parameters.starting_rq_factor_multiplier;
    },
    stage_counts = {15000, 9500, 5500, 2900, 1300, 400, 150, 80},
    stages =
    {
      sheet =
      {
        filename = "__base__/graphics/entity/" .. resource_parameters.name .. "/" .. resource_parameters.name .. ".png",
        priority = "extra-high",
        size = 64,
        frame_count = 8,
        variation_count = 8,
        hr_version =
        {
          filename = "__base__/graphics/entity/" .. resource_parameters.name .. "/hr-" .. resource_parameters.name .. ".png",
          priority = "extra-high",
          size = 128,
          frame_count = 8,
          variation_count = 8,
          scale = 0.5
        }
      }
    },
    map_color = resource_parameters.map_color
  }
end

data:extend(
{
  -- Usually earlier order takes priority, but there's some special
  -- case buried in the code about resources removing other things
  -- (though maybe there shouldn't be, and we should just place things in a different order).
  -- Trees are "a", and resources will delete trees when placed.
  -- Oil is "c" so won't be placed if another resource is already there.
  -- "d" is available for another resource, but isn't used for now.

  resource(
    { 
      name = "iron-ore",
      order = "b",
      map_color = {r=0.415, g=0.525, b=0.580},
      mining_time = 1
    },
    {
      base_density = 10,
      regular_rq_factor_multiplier = 1.10,
      starting_rq_factor_multiplier = 1.5
    }
  ),
  resource(
    { 
      name = "copper-ore",
      order = "b",
      map_color = {r=0.803, g=0.388, b=0.215},
      mining_time = 1
    },
    {
      base_density = 8,
      regular_rq_factor_multiplier = 1.10,
      starting_rq_factor_multiplier = 1.2
    }
  ),
  resource(
    { 
      name = "coal",
      order = "b",
      map_color = {r=0, g=0, b=0},
      mining_time = 1
    },
    {
      base_density = 8,
      regular_rq_factor_multiplier = 1.0,
      starting_rq_factor_multiplier = 1.1
    }
  ),
  resource(
    { 
      name = "stone",
      order = "b",
      map_color = {r=0.690, g=0.611, b=0.427},
      mining_time = 1
    },
    {
      base_density = 4,
      regular_rq_factor_multiplier = 1.0,
      starting_rq_factor_multiplier = 1.1
    }
  )
}
)