import * as Domain from "@/domain"
import { DateTimeUtcFromZonedInput } from "@/lib/schema"
import { TextAreaInput } from "@/lib/TextAreaInput"
import { TextFieldInput } from "@/lib/TextFieldInput"
import { Box, Button, Flex, IconButton } from "@radix-ui/themes"
import { GetRandomValues, makeUuid4 } from "@typed/id"
import { Chunk, Effect, Match, Option, Ref, Runtime, Schema, SubscriptionRef } from "effect"
import { Component, Memo } from "effect-fc"
import { Hooks } from "effect-fc/hooks"
import { SubscriptionSubRef } from "effect-fc/types"
import { FaArrowDown, FaArrowUp } from "react-icons/fa"
import { FaDeleteLeft } from "react-icons/fa6"
import { TodosState } from "./TodosState.service"


const StringTextAreaInput = TextAreaInput({ schema: Schema.String })
const OptionalDateInput = TextFieldInput({ optional: true, schema: DateTimeUtcFromZonedInput })

const makeTodo = makeUuid4.pipe(
    Effect.map(id => Domain.Todo.Todo.make({
        id,
        content: "",
        completedAt: Option.none(),
    })),
    Effect.provide(GetRandomValues.CryptoRandom),
)


export type TodoProps = (
    | { readonly _tag: "new", readonly index?: never }
    | { readonly _tag: "edit", readonly index: number }
)

export class Todo extends Component.makeUntraced(function* Todo(props: TodoProps) {
    const runtime = yield* Effect.runtime()
    const state = yield* TodosState

    const [ref, contentRef, completedAtRef] = yield* Hooks.useMemo(() => Match.value(props).pipe(
        Match.tag("new", () => Effect.andThen(makeTodo, SubscriptionRef.make)),
        Match.tag("edit", ({ index }) => Effect.succeed(SubscriptionSubRef.makeFromChunkRef(state.ref, index))),
        Match.exhaustive,

        Effect.map(ref => [
            ref,
            SubscriptionSubRef.makeFromPath(ref, ["content"]),
            SubscriptionSubRef.makeFromPath(ref, ["completedAt"]),
        ] as const),
    ), [props._tag, props.index])

    const [size] = yield* Hooks.useSubscribeRefs(state.sizeRef)

    const StringTextAreaInputFC = yield* StringTextAreaInput
    const OptionalDateInputFC = yield* OptionalDateInput

    return (
        <Flex direction="row" align="center" gap="2">
            <Box flexGrow="1">
                <Flex direction="column" align="stretch" gap="2">
                    <StringTextAreaInputFC ref={contentRef} />

                    <Flex direction="row" justify="center" align="center" gap="2">
                        <OptionalDateInputFC
                            ref={completedAtRef}
                            type="datetime-local"
                        />

                        {props._tag === "new" &&
                            <Button
                                onClick={() => ref.pipe(
                                    Effect.andThen(todo => Ref.update(state.ref, Chunk.prepend(todo))),
                                    Effect.andThen(makeTodo),
                                    Effect.andThen(todo => Ref.set(ref, todo)),
                                    Runtime.runSync(runtime),
                                )}
                            >
                                Add
                            </Button>
                        }
                    </Flex>
                </Flex>
            </Box>

            {props._tag === "edit" &&
                <Flex direction="column" justify="center" align="center" gap="1">
                    <IconButton
                        disabled={props.index <= 0}
                        onClick={() => Runtime.runSync(runtime)(
                            SubscriptionRef.updateEffect(state.ref, todos => Effect.gen(function*() {
                                if (props.index <= 0) return yield* Option.none()
                                return todos.pipe(
                                    Chunk.replace(props.index, yield* Chunk.get(todos, props.index - 1)),
                                    Chunk.replace(props.index - 1, yield* ref),
                                )
                            }))
                        )}
                    >
                        <FaArrowUp />
                    </IconButton>

                    <IconButton
                        disabled={props.index >= size - 1}
                        onClick={() => Runtime.runSync(runtime)(
                            SubscriptionRef.updateEffect(state.ref, todos => Effect.gen(function*() {
                                if (props.index >= size - 1) return yield* Option.none()
                                return todos.pipe(
                                    Chunk.replace(props.index, yield* Chunk.get(todos, props.index + 1)),
                                    Chunk.replace(props.index + 1, yield* ref),
                                )
                            }))
                        )}
                    >
                        <FaArrowDown />
                    </IconButton>

                    <IconButton
                        onClick={() => Runtime.runSync(runtime)(
                            Ref.update(state.ref, Chunk.remove(props.index))
                        )}
                    >
                        <FaDeleteLeft />
                    </IconButton>
                </Flex>
            }
        </Flex>
    )
}).pipe(
    Memo.memo
) {}