local util = require("util")
local conf = {}

---@class PlayerData
---@field advanced boolean Preserve in migrations
---@field blueprint_add_mode boolean Preserve in migrations
---@field entity_filtering_mode boolean Preserve in migrations
---@field gui PlayerGui
---@field blueprint_items LuaInventory Preserve in migrations
---@field choices PlayerChoices Preserve in migrations
---@field blueprints PlayerGuiBlueprints 
---@field last_state MininimumPreservedState? Preserve in migrations
---@field filtered_entities table<string, true>
---@field tick_expires integer When was gui closed, for undo button disabling

---@class PlayerChoices
---@field layout_choice string
---@field blueprint_choice LuaItemStack? Currently selected blueprint (flow)
---@field direction_choice string
---@field miner_choice string
---@field pole_choice string
---@field lamp_choice boolean
---@field belt_choice string
---@field space_belt_choice string
---@field logistics_choice string
---@field landfill_choice boolean
---@field space_landfill_choice string
---@field coverage_choice boolean
---@field start_choice boolean
---@field deconstruction_choice boolean
---@field pipe_choice string
---@field module_choice string
---@field show_non_electric_miners_choice boolean
---@field force_pipe_placement_choice boolean
---@field print_debug_info_choice boolean
---@field display_lane_filling_choice boolean
---@field dumb_power_connectivity_choice boolean
---@field debugging_choice string Debugging only value

---@class PlayerGui
---@field section table<MppSettingSections, LuaGuiElement>
---@field tables table<string, LuaGuiElement>
---@field selections table<string, LuaGuiElement>
---@field advanced_settings LuaGuiElement
---@field filtering_settings LuaGuiElement
---@field undo_button LuaGuiElement
---@field layout_dropdown LuaGuiElement
---@field blueprint_add_button LuaGuiElement
---@field blueprint_add_section LuaGuiElement
---@field blueprint_receptacle LuaGuiElement

---@class PlayerGuiBlueprints All subtables are indexed by blueprint's item number
---@field mapping table<number, LuaItemStack>
---@field flow table<number, LuaGuiElement> Root blueprint element
---@field button table<number, LuaGuiElement> Blueprint button toggle
---@field delete table<number, LuaGuiElement> Blueprint delete button
---@field cache table<number, EvaluatedBlueprint>
---@field original_id table<number, number> Inventory blueprint id to 

---Small hack have proper typing in all other places
---@type LuaGuiElement
local nil_element_placeholder = nil
---@type LuaInventory
local nil_inventory_placeholder = nil

---@type PlayerData
conf.default_config = {
	advanced = false,
	entity_filtering_mode = false,
	blueprint_add_mode = false,
	blueprint_items = nil_inventory_placeholder,
	filtered_entities = {},
	tick_expires = 0,

	choices = {
		layout_choice = "simple",
		direction_choice = "north",
		miner_choice = "electric-mining-drill",
		pole_choice = "medium-electric-pole",
		belt_choice = "transport-belt",
		space_belt_choice = "se-space-transport-belt",
		lamp_choice = false,
		logistics_choice = "logistic-chest-passive-provider",
		landfill_choice = false,
		space_landfill_choice = "se-space-platform-scaffold",
		coverage_choice = false,
		start_choice = false,
		deconstruction_choice = false,
		pipe_choice = "pipe",
		module_choice = "none",
		blueprint_choice = nil,
		dumb_power_connectivity_choice = false,
		debugging_choice = "none",

		-- non layout/convienence/advanced settings
		show_non_electric_miners_choice = false,
		force_pipe_placement_choice = false,
		print_debug_info_choice = false,
		display_lane_filling_choice = false,
	},

	gui = {
		section = {},
		tables = {},
		selections = {},
		advanced_settings = nil_element_placeholder,
		filtering_settings = nil_element_placeholder,
		undo_button = nil_element_placeholder,
		blueprint_add_button = nil_element_placeholder,
		blueprint_add_section = nil_element_placeholder,
		blueprint_receptacle = nil_element_placeholder,
		layout_dropdown = nil_element_placeholder,
	},

	blueprints = {
		mapping = {},
		cache = {},
		flow = {},
		button = {},
		delete = {},
		original_id = {},
	}
}

local function pass_same_type(old, new)
	if old and type(old) == type(new) then
		return old
	end
	return new
end

function conf.update_player_data(player_index)
	---@type PlayerData
	local old_config = global.players[player_index]
	local new_config = table.deepcopy(conf.default_config) --[[@as PlayerData]]

	new_config.advanced = pass_same_type(old_config.advanced, new_config.advanced)
	new_config.blueprint_add_mode = pass_same_type(old_config.blueprint_add_mode, new_config.blueprint_add_mode)
	new_config.blueprint_items = old_config.blueprint_items or game.create_inventory(1)
	new_config.last_state = old_config.last_state

	local old_choices = old_config.choices or {}
	for key, new_choice in pairs(new_config.choices) do
		new_config.choices[key] = pass_same_type(old_choices[key], new_choice)
	end

	global.players[player_index] = new_config
end

---@param player_index number
function conf.initialize_global(player_index)
	local old_data = global.players[player_index]
	global.players[player_index] = table.deepcopy(conf.default_config)
	if old_data and old_data.blueprint_items then
		global.players[player_index].blueprint_items = old_data.blueprint_items
	else
		global.players[player_index].blueprint_items = game.create_inventory(1)
	end
end

function conf.initialize_deconstruction_filter()
	if global.script_inventory then
		global.script_inventory.destroy()
	end

	---@type LuaInventory
	local inventory = game.create_inventory(2)
	do
		---@type LuaItemStack
		local basic = inventory[1]
		basic.set_stack("deconstruction-planner")
		basic.tile_selection_mode = defines.deconstruction_item.tile_selection_mode.never
	end

	do
		---@type LuaItemStack
		local ghosts = inventory[2]
		ghosts.set_stack("deconstruction-planner")
		ghosts.entity_filter_mode = defines.deconstruction_item.entity_filter_mode.whitelist
		ghosts.entity_filters = {"entity-ghost", "tile-ghost"}
	end

	global.script_inventory = inventory
end

script.on_event(defines.events.on_player_created, function(e)
	---@cast e EventData.on_player_created
	conf.initialize_global(e.player_index)
end)

script.on_event(defines.events.on_player_removed, function(e)
	---@cast e EventData.on_player_removed
	if global.players[e.player_index].blueprint_items then
		global.players[e.player_index].blueprint_items.destroy()
	end
	global.players[e.player_index] = nil
end)

return conf