-- Functions for working with CLR types.

local Environment = require 'ConsentRequiredExtended.Util.Environment'
local _ENV = Environment.PrepareEnvironment(_ENV)

local UserData = require 'ConsentRequiredExtended.Util.UserData'

---Construct ClrType wrapper table for CLR types.
---@param underlyingType userdata The underlying type (CLR type: System.Type).
---@return ClrType Wrapper table for working with CLR types.
local function New(underlyingType)
    ---@class ClrType
    local clrType = {}

    ---Instantiate an object for the given CLR type.
    ---@return any An instance of the CLR type. Actual Lua type depends on MoonSharp conversions.
    function clrType:Instantiate()
        -- TODO: Implement args.
        return underlyingType.Assembly.CreateInstance(underlyingType.FullName)
    end

    ---Get the underlying type as a raw CLR type object.
    ---@return userdata The raw underlying type (CLR type: System.Type).
    function clrType:GetUnderlyingType()
        return underlyingType
    end

    ---Get the full name of the CLR type.
    ---@return string The full name of the type.
    function clrType:GetFullName()
        return underlyingType.FullName
    end

    return clrType
end

---Create a constructed generic type.
---@param genericTypeName string The name of the generic type to construct and register.
---@vararg string
---@return ClrType The constructed generic type.
function CreateConstructedGenericType(genericTypeName, ...)
    local genericTypeArgumentsString = table.pack(...)

    local genericTypeArgumentsType = {}
    for _, typeString in pairs(genericTypeArgumentsString) do
        table.insert(genericTypeArgumentsType, GetRawClrType(typeString))
    end

    local genericTypeDefinition = GetRawClrType(genericTypeName)
    local constructedGenericType = genericTypeDefinition.MakeGenericType(table.unpack(genericTypeArgumentsType))
    return New(constructedGenericType)
end

---Get a System.Type object from a type name.
---@param typeName string Name of the type.
---@return userdata The type object (CLR type: System.Type).
function GetRawClrType(typeName)
    return LuaUserData.GetType(typeName)
end

---Get a ClrType instance wrapping a Type object that matches the type name.
---@param typeName string Name of the type.
---@return ClrType The CLR type.
function GetClrType(typeName)
    return New(GetRawClrType(typeName))
end

local function Init()
    UserData.RegisterStandardType("System.Type")
    UserData.RegisterStandardType("System.Reflection.RuntimeAssembly")
end

Init()
return Environment.Export(_ENV)