local Public = require 'maps.mountain_fortress_v3.table'
local simplex_noise = require 'utils.math.simplex_noise'.d2

--add or use noise templates from here
local noises =
{
    ['cave_ponds'] = { { modifier = 0.014, weight = 0.77 }, { modifier = 0.18, weight = 0.085 } },
    ['smol_areas'] =
    {
        { modifier = 0.0052, weight = 0.83 },
        { modifier = 0.139, weight = 0.144 },
        { modifier = 0.129, weight = 0.072 },
        { modifier = 0.111, weight = 0.01 }
    },
    ['cave_rivers'] =
    {
        { modifier = 0.0053, weight = 0.71 },
        { modifier = 0.0086, weight = 0.24 },
        { modifier = 0.070, weight = 0.025 }
    },
    ['cave_rivers_2'] =
    {
        { modifier = 0.0035, weight = 0.90 },
        { modifier = 0.0088, weight = 0.15 },
        { modifier = 0.051, weight = 0.011 }
    },
    ['dungeons'] = { { modifier = 0.0028, weight = 0.99 }, { modifier = 0.0059, weight = 0.21 } },
    ['dungeon_sewer'] =
    {
        { modifier = 0.00055, weight = 1.05 },
        { modifier = 0.0062, weight = 0.024 },
        { modifier = 0.0275, weight = 0.00135 }
    },
    ['large_caves'] =
    {
        { modifier = 0.055, weight = 0.045 },
        { modifier = 0.11, weight = 0.042 },
        { modifier = 0.00363, weight = 1.05 },
        { modifier = 0.01, weight = 0.23 }
    },
    ['no_rocks'] =
    {
        { modifier = 0.00495, weight = 0.945 },
        { modifier = 0.01665, weight = 0.2475 },
        { modifier = 0.0435, weight = 0.0435 },
        { modifier = 0.07968, weight = 0.0315 }
    },
    ['no_rocks_2'] = { { modifier = 0.0184, weight = 1.265 }, { modifier = 0.143, weight = 0.1045 } },
    ['oasis'] =
    {
        { modifier = 0.00165, weight = 1.1 },
        { modifier = 0.00275, weight = 0.55 },
        { modifier = 0.011, weight = 0.165 },
        { modifier = 0.11, weight = 0.0187 }
    },
    ['scrapyard'] =
    {
        { modifier = 0.0055, weight = 1.1 },
        { modifier = 0.011, weight = 0.385 },
        { modifier = 0.055, weight = 0.253 },
        { modifier = 0.11, weight = 0.121 }
    },
    ['scrapyard_modified'] =
    {
        { modifier = 0.0066, weight = 1.1 },
        { modifier = 0.044, weight = 0.165 },
        { modifier = 0.242, weight = 0.055 },
        { modifier = 0.055, weight = 0.352 }
    },
    ['small_caves'] =
    {
        { modifier = 0.0066, weight = 1.1 },
        { modifier = 0.044, weight = 0.165 },
        { modifier = 0.242, weight = 0.055 }
    },
    ['small_caves_2'] =
    {
        { modifier = 0.0099, weight = 1.1 },
        { modifier = 0.055, weight = 0.275 },
        { modifier = 0.275, weight = 0.055 }
    },
    ['forest_location'] =
    {
        { modifier = 0.0066, weight = 1.1 },
        { modifier = 0.011, weight = 0.275 },
        { modifier = 0.055, weight = 0.165 },
        { modifier = 0.11, weight = 0.0825 }
    },
    ['forest_density'] =
    {
        { modifier = 0.01, weight = 1 },
        { modifier = 0.05, weight = 0.5 },
        { modifier = 0.1, weight = 0.025 }
    },
    ['cave_miner_01'] =
    {
        { modifier = 0.002, weight = 1 },
        { modifier = 0.003, weight = 0.5 },
        { modifier = 0.01, weight = 0.01 },
        { modifier = 0.1, weight = 0.015 }
    },
    ['cave_miner_02'] =
    {
        { modifier = 0.006, weight = 1 },
        { modifier = 0.02, weight = 0.15 },
        { modifier = 0.25, weight = 0.025 }
    },
    ['ore'] =
    {
        {
            modifier = 0.008,
            weight = 1
        }, { modifier = 0.025, weight = 0.25 }, { modifier = 0.1, weight = 0.1 }
    },
}

--returns a float number between -1 and 1
function Public.get_noise(name, pos, seed)
    local noise = 0
    local d = 0
    for i = 1, #noises[name] do
        local mod = noises[name]
        noise = noise + simplex_noise(pos.x * mod[i].modifier, pos.y * mod[i].modifier, seed) * mod[i].weight
        d = d + mod[i].weight
        seed = seed + seed / seed
    end
    noise = noise / d
    return noise
end

return Public
