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}
    }
}

--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