local Treasure = require 'maps.chronosphere.treasure'
local Simplex_noise = require 'utils.math.simplex_noise'.d2
local Raffle = require 'maps.chronosphere.raffles'
local Chrono_table = require 'maps.chronosphere.table'
local Blueprints = require 'maps.chronosphere.worlds.blueprints'
local abs = math.abs
local random = math.random
local sqrt = math.sqrt
local min = math.min
local floor = math.floor

local Public = {}

local noises = {
    ['no_rocks'] = { { modifier = 0.0033, weight = 1 }, { modifier = 0.01, weight = 0.22 }, { modifier = 0.05, weight = 0.05 }, { modifier = 0.1, weight = 0.04 } },
    ['no_rocks_2'] = { { modifier = 0.013, weight = 1 }, { modifier = 0.1, weight = 0.1 } },
    ['large_caves'] = { { modifier = 0.0033, weight = 1 }, { modifier = 0.01, weight = 0.22 }, { modifier = 0.05, weight = 0.05 }, { modifier = 0.1, weight = 0.04 } },
    ['small_caves'] = { { modifier = 0.008, weight = 1 }, { modifier = 0.03, weight = 0.15 }, { modifier = 0.25, weight = 0.05 } },
    ['small_caves_2'] = { { modifier = 0.009, weight = 1 }, { modifier = 0.05, weight = 0.25 }, { modifier = 0.25, weight = 0.05 } },
    ['cave_ponds'] = { { modifier = 0.01, weight = 1 }, { modifier = 0.1, weight = 0.06 } },
    ['cave_rivers'] = { { modifier = 0.005, weight = 1 }, { modifier = 0.01, weight = 0.25 }, { modifier = 0.05, weight = 0.01 } },
    ['cave_rivers_2'] = { { modifier = 0.003, weight = 1 }, { modifier = 0.01, weight = 0.21 }, { modifier = 0.05, weight = 0.01 } },
    ['cave_rivers_3'] = { { modifier = 0.002, weight = 1 }, { modifier = 0.01, weight = 0.15 }, { modifier = 0.05, weight = 0.01 } },
    ['cave_rivers_4'] = { { modifier = 0.001, weight = 1 }, { modifier = 0.01, weight = 0.11 }, { modifier = 0.05, weight = 0.01 } },
    ['scrapyard'] = { { modifier = 0.005, weight = 1 }, { modifier = 0.01, weight = 0.35 }, { modifier = 0.05, weight = 0.23 }, { modifier = 0.1, weight = 0.11 } },
    ['forest_location'] = { { modifier = 0.006, weight = 1 }, { modifier = 0.01, weight = 0.25 }, { modifier = 0.05, weight = 0.15 }, { modifier = 0.1, weight = 0.05 } },
    ['forest_density'] = { { modifier = 0.01, weight = 1 }, { modifier = 0.05, weight = 0.5 }, { modifier = 0.1, weight = 0.025 } },
    ['ores'] = { { modifier = 0.05, weight = 1 }, { modifier = 0.02, weight = 0.55 }, { modifier = 0.05, weight = 0.05 } },
    ['hedgemaze'] = { { modifier = 0.001, weight = 1 } }
}

local entity_functions = {
    ['turret'] = function (surface, entity)
        surface.create_entity(entity)
    end,
    ['simple-entity'] = function (surface, entity)
        surface.create_entity(entity)
    end,
    ['simple-entity-with-owner'] = function (surface, entity)
        surface.create_entity(entity)
    end,
    ['ammo-turret'] = function (surface, entity)
        local e = surface.create_entity(entity)
        e.insert({ name = 'uranium-rounds-magazine', count = random(16, 64) })
    end,
    ['container'] = function (surface, entity)
        Treasure(surface, entity.position, entity.name)
    end,
    ['lab'] = function (surface, entity)
        local objective = Chrono_table.get_table()
        local e = surface.create_entity(entity)
        local evo = 1 + min(floor(objective.chronojumps / 5), 4)
        local research = {
            { 'automation-science-pack', 'logistic-science-pack' },
            { 'automation-science-pack', 'logistic-science-pack', 'military-science-pack' },
            { 'automation-science-pack', 'logistic-science-pack', 'military-science-pack', 'chemical-science-pack' },
            { 'automation-science-pack', 'logistic-science-pack', 'military-science-pack', 'chemical-science-pack', 'production-science-pack' },
            { 'automation-science-pack', 'logistic-science-pack', 'military-science-pack', 'chemical-science-pack', 'production-science-pack', 'utility-science-pack' }
        }
        for _, science in pairs(research[evo]) do
            e.insert({ name = science, count = random(min(30 + objective.chronojumps * 5, 100), min(60 + objective.chronojumps * 5, 200)) })
        end
    end
}

local function get_replacement_tile(surface, position)
    local objective = Chrono_table.get_table()
    for i = 1, 128, 1 do
        local vectors = { { 0, i }, { 0, i * -1 }, { i, 0 }, { i * -1, 0 } }
        table.shuffle_table(vectors)
        for k, v in pairs(vectors) do
            local tile = surface.get_tile(position.x + v[1], position.y + v[2])
            if tile and tile.valid and not tile.collides_with('resource') then
                return tile.name
            end
        end
    end
    return objective.world.default_tile or 'grass-1'
end

function Public.get_noise(name, pos, seed)
    local noise = 0
    local d = 0
    for _, n in pairs(noises[name]) do
        noise = noise + Simplex_noise(pos.x * n.modifier, pos.y * n.modifier, seed) * n.weight
        d = d + n.weight
        seed = seed + 10000
    end
    noise = noise / d
    return noise
end

function Public.replace_water(surface, left_top)
    local tiles = {}
    for x = 0, 31, 1 do
        for y = 0, 31, 1 do
            local p = { x = left_top.x + x, y = left_top.y + y }
            local tile = surface.get_tile(p)
            if tile.hidden_tile then
                surface.set_hidden_tile(p, get_replacement_tile(surface, p))
            elseif tile.collides_with('resource') then
                tiles[#tiles + 1] = { name = get_replacement_tile(surface, p), position = p }
            end
        end
    end
    surface.set_tiles(tiles, true)
end

function Public.spawn_entities(surface, entities)
    local objective = Chrono_table.get_table()
    for _, entity in pairs(entities) do
        if entity_functions[prototypes.entity[entity.name].type] then
            entity_functions[prototypes.entity[entity.name].type](surface, entity)
        else
            if surface.can_place_entity(entity) then
                local e = surface.create_entity(entity)
                if (e.type == 'unit-spawner' or e.type == 'turret') and objective.world.id ~= 7 then
                    if abs(e.position.x) > 420 or abs(e.position.y) > 420 then
                        e.destructible = false
                    end
                end
            end
        end
    end
end

function Public.spawn_decoratives(surface, decoratives)
    surface.create_decoratives { check_collision = false, decoratives = decoratives }
end

function Public.spawn_treasures(surface, treasures)
    for _, p in pairs(treasures) do
        local name = 'wooden-chest'
        if random(1, 6) == 1 then
            name = 'iron-chest'
        end
        if surface.can_place_entity({ name = name, position = p }) then
            Treasure(surface, p, name)
        end
    end
end

function Public.distance(x, y)
    return sqrt(x * x + y * y)
end

function Public.is_scrap(name)
    for i = 1, #Raffle.scraps, 1 do
        if name == Raffle.scraps[i] then
            return true
        end
    end
    for i = 1, #Raffle.scraps_inv, 1 do
        if name == Raffle.scraps_inv[i] then
            return true
        end
    end
    return false
end

--LABYRINTH--
local modifiers = {
    { x = 0,  y = -1 },
    { x = -1, y = 0 },
    { x = 1,  y = 0 },
    { x = 0,  y = 1 }
}
local modifiers_diagonal = {
    { diagonal = { x = -1, y = 1 },  connection_1 = { x = -1, y = 0 }, connection_2 = { x = 0, y = 1 } },
    { diagonal = { x = 1, y = -1 },  connection_1 = { x = 1, y = 0 },  connection_2 = { x = 0, y = -1 } },
    { diagonal = { x = 1, y = 1 },   connection_1 = { x = 1, y = 0 },  connection_2 = { x = 0, y = 1 } },
    { diagonal = { x = -1, y = -1 }, connection_1 = { x = -1, y = 0 }, connection_2 = { x = 0, y = -1 } }
}

local function get_path_connections_count(cell_pos)
    local scheduletable = Chrono_table.get_schedule_table()
    local connections = 0
    for _, m in pairs(modifiers) do
        if scheduletable.lab_cells[tostring(cell_pos.x + m.x) .. '_' .. tostring(cell_pos.y + m.y)] then
            connections = connections + 1
        end
    end
    return connections
end

function Public.process_labyrinth_cell(pos, seed)
    local scheduletable = Chrono_table.get_schedule_table()
    local lake_noise_value = -0.85
    local cell_position = { x = pos.x / 32, y = pos.y / 32 }
    local mazenoise = Public.get_noise('hedgemaze', cell_position, seed)

    if mazenoise < lake_noise_value and Public.distance(pos.x / 32, pos.y / 32) > 65 then
        return false
    end

    scheduletable.lab_cells[tostring(cell_position.x) .. '_' .. tostring(cell_position.y)] = false

    for _, modifier in pairs(modifiers_diagonal) do
        if scheduletable.lab_cells[tostring(cell_position.x + modifier.diagonal.x) .. '_' .. tostring(cell_position.y + modifier.diagonal.y)] then
            local connection_1 = scheduletable.lab_cells[tostring(cell_position.x + modifier.connection_1.x) .. '_' .. tostring(cell_position.y + modifier.connection_1.y)]
            local connection_2 = scheduletable.lab_cells[tostring(cell_position.x + modifier.connection_2.x) .. '_' .. tostring(cell_position.y + modifier.connection_2.y)]
            if not connection_1 and not connection_2 then
                return false
            end
        end
    end

    for _, m in pairs(modifiers) do
        if get_path_connections_count({ x = cell_position.x + m.x, y = cell_position.y + m.y }) >= random(2, 3) then
            return false
        end
    end

    if get_path_connections_count(cell_position) >= random(2, 3) then
        return false
    end

    scheduletable.lab_cells[tostring(cell_position.x) .. '_' .. tostring(cell_position.y)] = true
    return true
end

function Public.build_blueprint(surface, position, id, force)
    local nauvis = game.get_surface(1)
    local item = nauvis and nauvis.create_entity { name = "item-on-ground", position = position, stack = { name = "blueprint", count = 1 } }
    local success = item and item.stack.import_stack(Blueprints[id])
    if success <= 0 then
        local ghosts = item and item.stack.build_blueprint { surface = surface, force = force, position = position, build_mode = defines.build_mode.forced } or {}
        for _, ghost in pairs(ghosts) do
            ghost.silent_revive({ raise_revive = true })
        end
    end
    if item and item.valid then item.destroy() end
end

return Public