require 'modules.sticky_landfill'
require 'modules.dynamic_player_spawn'
require 'modules.biters_yield_ore'

local math_random = math.random
local math_floor = math.floor
local table_insert = table.insert
local math_abs = math.abs

local map_height = 96

local infini_ores = {'iron-ore', 'iron-ore', 'copper-ore', 'coal', 'stone'}

local function on_player_joined_game(event)
    local surface = game.surfaces['railway_troopers']
    local player = game.players[event.player_index]
    if player.online_time == 0 then
        player.teleport(surface.find_non_colliding_position('character', game.forces.player.get_spawn_position(surface), 32, 0.5), surface)
    end
end

local function set_commands(unit_group)
    local surface = unit_group.surface
    local position = unit_group.position
    local commands = {}
    for x = position.x, -8196, -32 do
        if surface.is_chunk_generated({math_floor(x / 32), math_floor(position.y / 32)}) then
            if math_random(1, 16) == 1 then
                commands[#commands + 1] = {
                    type = defines.command.build_base,
                    destination = {x = x, y = position.y},
                    distraction = defines.distraction.by_anything,
                    ignore_planner = true
                }
            else
                commands[#commands + 1] = {
                    type = defines.command.attack_area,
                    destination = {x = x, y = position.y},
                    radius = 16,
                    distraction = defines.distraction.by_anything
                }
            end
        else
            break
        end
    end

    if #commands == 0 then
        return
    end

    unit_group.set_command(
        {
            type = defines.command.compound,
            structure_type = defines.compound_command.return_last,
            commands = commands
        }
    )
end

local function send_wave(spawner, search_radius)
    local biters = spawner.surface.find_enemy_units(spawner.position, search_radius, 'player')
    if biters[1] then
        local unit_group = spawner.surface.create_unit_group({position = {x = spawner.position.x, y = -42 + math_random(0, 84)}, force = 'enemy'})
        for _, unit in pairs(biters) do
            unit_group.add_member(unit)
        end
        set_commands(unit_group)
    end
end

local function on_entity_spawned(event)
    global.on_entity_spawned_counter = global.on_entity_spawned_counter + 1
    local c = global.on_entity_spawned_counter * 0.5
    if c % 2 ~= 0 then
        return
    end
    for a = 14, 6, -2 do
        local b = 2 ^ a
        if c % b == 0 then
            send_wave(event.spawner, a ^ 2 - 28)
            return
        end
    end
end

local function on_entity_died(event)
    local entity = event.entity
    if not entity.valid then
        return
    end

    if entity.type == 'unit' and entity.spawner then
        entity.spawner.damage(20, game.forces[1])
    end
end

local function is_out_of_map(p)
    local a = p.x + 1960
    local b = math_abs(p.y)
    if a * 0.025 >= b then
        return
    end
    if a * -0.025 > b then
        return
    end
    return true
end

local function draw_west_side(surface, left_top)
    local entities = {}
    for x = 0, 31, 1 do
        for y = 0, 31, 1 do
            local position = {x = left_top.x + x, y = left_top.y + y}
            if math_abs(position.y) > map_height * 0.5 then
                surface.set_tiles({{name = 'out-of-map', position = position}}, true)
            else
                surface.set_tiles({{name = 'deepwater-green', position = position}}, true)
                if math_random(1, 64) == 1 then
                    table_insert(entities, {name = 'fish', position = position})
                end
                if math_random(1, 8196) == 1 and position.x < -64 then
                    table_insert(entities, {name = 'crude-oil', position = position, amount = 200000 + math_abs(left_top.x * 500)})
                end
            end
        end
    end
    for _, entity in pairs(entities) do
        surface.create_entity(entity)
    end
end

local function draw_east_side(surface, left_top)
    local entities = {}

    if left_top.y == 0 and left_top.x < 64 then
        for x = 0, 30, 2 do
            surface.create_entity({name = 'straight-rail', position = {left_top.x + x, 0}, direction = 2, force = 'player'})
        end
        if left_top.x == -32 then
            local entity = surface.create_entity({name = 'cargo-wagon', position = {-24, 0}, force = 'player', direction = 2})
            entity.get_inventory(defines.inventory.cargo_wagon).insert({name = 'firearm-magazine', count = 600})
            entity.get_inventory(defines.inventory.cargo_wagon).insert({name = 'shotgun', count = 2})
            entity.get_inventory(defines.inventory.cargo_wagon).insert({name = 'shotgun-shell', count = 64})
            entity.get_inventory(defines.inventory.cargo_wagon).insert({name = 'light-armor', count = 5})
            entity.get_inventory(defines.inventory.cargo_wagon).insert({name = 'grenade', count = 32})
            entity.get_inventory(defines.inventory.cargo_wagon).insert({name = 'pistol', count = 10})
            entity.get_inventory(defines.inventory.cargo_wagon).insert({name = 'rail', count = 100})
            entity = surface.create_entity({name = 'locomotive', position = {-18, 0}, force = 'player', direction = 2})
            entity.get_inventory(defines.inventory.fuel).insert({name = 'wood', count = 25})
        end
    end

    for x = 0, 31, 1 do
        for y = 0, 31, 1 do
            local position = {x = left_top.x + x, y = left_top.y + y}
            if is_out_of_map(position) then
                surface.set_tiles({{name = 'out-of-map', position = position}}, true)
            else
                if math_random(1, 4096) == 1 and left_top.x > -32 and math_abs(left_top.y) > 2 then
                    table_insert(entities, {name = infini_ores[math_random(1, #infini_ores)], position = position, amount = 99999999})
                    table_insert(entities, {name = 'electric-mining-drill', position = position, force = 'enemy'})
                end
            end
        end
    end

    for _, entity in pairs(entities) do
        local e = surface.create_entity(entity)
        if e.name == 'electric-mining-drill' then
            if e.position.y < 0 then
                e.direction = 4
            else
                e.direction = 0
            end
            e.minable = false
            e.destructible = false
        --e.insert({name = "coal", count = math_random(8, 36)})
        end
    end
end

local function on_chunk_generated(event)
    local surface = event.surface
    local left_top = event.area.left_top

    if left_top.x < -32 then
        draw_west_side(surface, left_top)
    else
        draw_east_side(surface, left_top)
    end
end

local type_whitelist = {
    ['artillery-wagon'] = true,
    ['car'] = true,
    ['cargo-wagon'] = true,
    ['construction-robot'] = true,
    ['container'] = true,
    ['curved-rail'] = true,
    ['electric-pole'] = true,
    ['entity-ghost'] = true,
    ['fluid-wagon'] = true,
    ['heat-pipe'] = true,
    ['inserter'] = true,
    ['lamp'] = true,
    ['locomotive'] = true,
    ['logistic-robot'] = true,
    ['rail-chain-signal'] = true,
    ['rail-signal'] = true,
    ['splitter'] = true,
    ['straight-rail'] = true,
    ['tile-ghost'] = true,
    ['train-stop'] = true,
    ['transport-belt'] = true,
    ['underground-belt'] = true,
    ['wall'] = true,
    ['gate'] = true,
    ['beacon'] = true
}

local function deny_building(event)
    local entity = event.created_entity
    if not entity.valid then
        return
    end

    if type_whitelist[event.created_entity.type] then
        return
    end

    if entity.position.x < -32 then
        return
    end

    if event.player_index then
        game.players[event.player_index].insert({name = entity.name, count = 1})
    else
        local inventory = event.robot.get_inventory(defines.inventory.robot_cargo)
        inventory.insert({name = entity.name, count = 1})
    end

    event.created_entity.surface.create_entity(
        {
            name = 'flying-text',
            position = entity.position,
            text = 'Can only be built west!',
            color = {r = 0.98, g = 0.66, b = 0.22}
        }
    )

    entity.destroy()
end

local function on_built_entity(event)
    deny_building(event)
end

local function on_robot_built_entity(event)
    deny_building(event)
end

local function on_research_finished(event)
    event.research.force.character_inventory_slots_bonus = game.forces.player.mining_drill_productivity_bonus * 200
    event.research.force.character_item_pickup_distance_bonus = game.forces.player.mining_drill_productivity_bonus * 10
end

local function send_tick_wave()
    if game.tick % 54000 ~= 3600 then
        return
    end
    local surface = game.surfaces['railway_troopers']
    local spawners = surface.find_entities_filtered({type = 'unit-spawner'})
    if not spawners[1] then
        return
    end

    local search_radius = 16
    for _, player in pairs(game.connected_players) do
        if player.position.x * 0.5 > search_radius then
            search_radius = math_floor(player.position.x * 0.5)
        end
    end
    if search_radius > 256 then
        search_radius = 256
    end

    send_wave(spawners[math_random(1, #spawners)], search_radius)
end

local function on_tick()
    send_tick_wave()
end

local function on_init()
    global.drop_schedule = {}
    global.on_entity_spawned_counter = 0

    game.map_settings.enemy_evolution.destroy_factor = 0.001
    --game.map_settings.enemy_evolution.pollution_factor = 0
    --game.map_settings.enemy_evolution.time_factor = 0
    game.map_settings.enemy_expansion.enabled = true
    game.map_settings.enemy_expansion.max_expansion_cooldown = 900
    game.map_settings.enemy_expansion.min_expansion_cooldown = 900
    game.map_settings.enemy_expansion.settler_group_max_size = 128
    game.map_settings.enemy_expansion.settler_group_min_size = 32
    game.map_settings.enemy_expansion.max_expansion_distance = 16
    game.map_settings.pollution.enemy_attack_pollution_consumption_modifier = 0.25

    local map_gen_settings = {
        ['water'] = 0,
        ['starting_area'] = 0.60,
        ['cliff_settings'] = {cliff_elevation_interval = 0, cliff_elevation_0 = 0},
        ['autoplace_controls'] = {
            ['coal'] = {frequency = 0, size = 0.65, richness = 0.5},
            ['stone'] = {frequency = 0, size = 0.65, richness = 0.5},
            ['copper-ore'] = {frequency = 0, size = 0.65, richness = 0.5},
            ['iron-ore'] = {frequency = 0, size = 0.65, richness = 0.5},
            ['uranium-ore'] = {frequency = 0, size = 1, richness = 1},
            ['crude-oil'] = {frequency = 0, size = 1, richness = 0.75},
            ['trees'] = {frequency = 2, size = 0.15, richness = 1},
            ['enemy-base'] = {frequency = 256, size = 2, richness = 1}
        }
    }

    local surface = game.create_surface('railway_troopers', map_gen_settings)
    surface.request_to_generate_chunks({0, 0}, 4)
    surface.force_generate_chunk_requests()

    local force = game.forces.player

    force.set_spawn_position({-30, 0}, surface)

    force.technologies['landfill'].researched = true
    force.technologies['railway'].researched = true
    force.technologies['engine'].researched = true

    local types_to_disable = {
        ['ammo'] = true,
        ['armor'] = true,
        ['car'] = true,
        ['gun'] = true,
        ['capsule'] = true
    }

    for _, recipe in pairs(game.recipe_prototypes) do
        if types_to_disable[recipe.subgroup.name] then
            force.set_hand_crafting_disabled_for_recipe(recipe.name, true)
        end
    end
end

local Event = require 'utils.event'
Event.on_init(on_init)
Event.add(defines.events.on_research_finished, on_research_finished)
Event.add(defines.events.on_tick, on_tick)
Event.add(defines.events.on_built_entity, on_built_entity)
Event.add(defines.events.on_robot_built_entity, on_robot_built_entity)
Event.add(defines.events.on_entity_died, on_entity_died)
Event.add(defines.events.on_entity_spawned, on_entity_spawned)
Event.add(defines.events.on_player_joined_game, on_player_joined_game)
Event.add(defines.events.on_chunk_generated, on_chunk_generated)