--------------------------------------------------------------------------------------------------------------
-- vide.lua
-- v0.1.0
--------------------------------------------------------------------------------------------------------------

if not game then script = (require :: any) "test/wrap-require" end

local create = require(script.create)
local apply = require(script.apply)
local wrap = require(script.wrap)
local watch = require(script.watch)
local derive = require(script.derive)
local map = require(script.map)

local unwrap = require(script.unwrap)
local wrapped = require(script.wrapped)

local Layout = require(script.Layout)
local Children = require(script.Children)
local Event = require(script.Event)
local Changed = require(script.Change)
local Created = require(script.Created)

local spring, updateSprings = require(script.spring)()

local flags = require(script.flags)

type Map<K, V> = { [K]: V }
type Unwrapper = <T>(T) -> T
type Setter<T> = ( (new: T, force: true?) -> T ) & ( (update: (old: T) -> T, force: true?) -> T )

local vide = {
    -- core
    create = create,
    apply = apply,
    wrap = (wrap :: any) :: <T>(value: T?) -> (T, Setter<T>),
    derive = (derive :: any) :: <T>(deriver: (from: <U>(U) -> U) -> T, cleanup: (T) -> ()?) -> T,
    map = (map :: any) :: ( <V>(input: number, transform: (number) -> V, cleanup: (V) -> ()?) -> Map<number, V> ) & ( <K, VI, VO>(input: Map<K, VI>, transform: (K, VI) -> VO, cleanup: (VO) -> ()?) -> Map<K, VO> ),
    watch = watch :: ((Unwrapper) -> ()) -> () -> (),

    -- util
    unwrap = unwrap,
    wrapped = wrapped,

    -- animations
    spring = (spring :: any) :: <T>(input: T, period: number, damping: number?) -> T,

    -- symbols
    Event = Event,
    Changed = Changed,
    Layout = Layout,
    Children = Children,
    Created = Created,

    -- flags
    strict = (nil :: any) :: boolean,

    -- test
    step = function(dt: number)
        updateSprings(dt)
    end
}

setmetatable(vide :: any, {
    __index = function(_, index: unknown)
        error(string.format("\"%s\" is not a valid member of vide", tostring(index)), 2)
    end,

    __newindex = function(_, index: unknown, value: unknown)
        if index == "strict" then
            flags.strict = if type(value) == "boolean" then value else error("strict must be a boolean", 2)
        else
            error(string.format("\"%s\" is not a valid member of vide", tostring(index)), 2)
        end
    end
})

if game then
    game:GetService("RunService").Heartbeat:Connect(function(dt: number)
        task.defer(vide.step, dt)
    end)
end

return vide