import { GlobalBus } from "@/bus/global"

import { WorkspaceContext } from "@/control-plane/workspace-context"

import { InstanceRef } from "@/effect/instance-ref"

import { disposeInstance as runDisposers } from "@/effect/instance-registry"

import { AppFileSystem } from "@opencode-ai/core/filesystem"

import { Context, Deferred, Duration, Effect, Exit, Layer, Scope } from "effect"

import { type InstanceContext } from "./instance-context"

import { InstanceBootstrap } from "./bootstrap-service"

import * as Project from "./project"

export interface LoadInput {

directory: string

worktree?: string

project?: Project.Info

}

export interface Interface {

readonly load: (input: LoadInput) => Effect.Effect<InstanceContext>

readonly reload: (input: LoadInput) => Effect.Effect<InstanceContext>

readonly dispose: (ctx: InstanceContext) => Effect.Effect<void>

readonly disposeAll: () => Effect.Effect<void>

readonly provide: <A, E, R>(input: LoadInput, effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>

}

export class Service extends Context.Service<Service, Interface>()("@opencode/InstanceStore") {}

interface Entry {

readonly deferred: Deferred.Deferred<InstanceContext>

}

export const layer: Layer.Layer<Service, never, Project.Service | InstanceBootstrap.Service> = Layer.effect(

Service,

Effect.gen(function* () {

const project = yield* Project.Service

const bootstrap = yield* InstanceBootstrap.Service

const scope = yield* Scope.Scope

const cache = new Map<string, Entry>()

const boot = (input: LoadInput & { directory: string }) =>

Effect.gen(function* () {

const ctx: InstanceContext =

input.project && input.worktree

? {

directory: input.directory,

worktree: input.worktree,

project: input.project,

}

: yield* project.fromDirectory(input.directory).pipe(

Effect.map((result) => ({

directory: input.directory,

worktree: result.sandbox,

project: result.project,

})),

)

yield* bootstrap.run.pipe(Effect.provideService(InstanceRef, ctx))

return ctx

}).pipe(Effect.withSpan("InstanceStore.boot"))

const removeEntry = (directory: string, entry: Entry) =>

Effect.sync(() => {

if (cache.get(directory) !== entry) return false

cache.delete(directory)

return true

})

const completeLoad = (directory: string, input: LoadInput, entry: Entry) =>

Effect.gen(function* () {

const exit = yield* Effect.exit(boot({ ...input, directory }))

if (Exit.isFailure(exit)) yield* removeEntry(directory, entry)

yield* Deferred.done(entry.deferred, exit).pipe(Effect.asVoid)

})

const emitDisposed = (input: { directory: string; project?: string }) =>

Effect.sync(() =>

GlobalBus.emit("event", {

directory: input.directory,

project: input.project,

workspace: WorkspaceContext.workspaceID,

payload: {

type: "server.instance.disposed",

properties: {

directory: input.directory,

},

},

}),

)

const disposeContext = Effect.fn("InstanceStore.disposeContext")(function* (ctx: InstanceContext) {

yield* Effect.logInfo("disposing instance").pipe(Effect.annotateLogs("directory", ctx.directory))

yield* Effect.promise(() => runDisposers(ctx.directory))

yield* emitDisposed({ directory: ctx.directory, project: ctx.project.id })

})

const disposeEntry = Effect.fnUntraced(function* (directory: string, entry: Entry, ctx: InstanceContext) {

if (cache.get(directory) !== entry) return false

yield* disposeContext(ctx)

if (cache.get(directory) !== entry) return false

cache.delete(directory)

return true

})

const load = (input: LoadInput): Effect.Effect<InstanceContext> => {

const directory = AppFileSystem.resolve(input.directory)

return Effect.uninterruptibleMask((restore) =>

Effect.gen(function* () {

const existing = cache.get(directory)

if (existing) return yield* restore(Deferred.await(existing.deferred))

const entry: Entry = { deferred: Deferred.makeUnsafe<InstanceContext>() }

cache.set(directory, entry)

yield* Effect.gen(function* () {

yield* Effect.logInfo("creating instance").pipe(Effect.annotateLogs("directory", directory))

yield* completeLoad(directory, input, entry)

}).pipe(Effect.forkIn(scope, { startImmediately: true }))

return yield* restore(Deferred.await(entry.deferred))

}),

).pipe(Effect.withSpan("InstanceStore.load"))

}

const reload = (input: LoadInput): Effect.Effect<InstanceContext> => {

const directory = AppFileSystem.resolve(input.directory)

return Effect.uninterruptibleMask((restore) =>

Effect.gen(function* () {

const previous = cache.get(directory)

const entry: Entry = { deferred: Deferred.makeUnsafe<InstanceContext>() }

cache.set(directory, entry)

yield* Effect.gen(function* () {

yield* Effect.logInfo("reloading instance").pipe(Effect.annotateLogs("directory", directory))

if (previous) {

yield* Deferred.await(previous.deferred).pipe(Effect.ignore)

yield* Effect.promise(() => runDisposers(directory))

yield* emitDisposed({ directory, project: input.project?.id })

}

yield* completeLoad(directory, input, entry)

}).pipe(Effect.forkIn(scope, { startImmediately: true }))

return yield* restore(Deferred.await(entry.deferred))

}),

).pipe(Effect.withSpan("InstanceStore.reload"))

}

const dispose = Effect.fn("InstanceStore.dispose")(function* (ctx: InstanceContext) {

const entry = cache.get(ctx.directory)

if (!entry) return yield* disposeContext(ctx)

const exit = yield* Deferred.await(entry.deferred).pipe(Effect.exit)

if (Exit.isFailure(exit)) return yield* removeEntry(ctx.directory, entry).pipe(Effect.asVoid)

if (exit.value !== ctx) return

yield* disposeEntry(ctx.directory, entry, ctx).pipe(Effect.asVoid)

})

const disposeAllOnce = Effect.fnUntraced(function* () {

yield* Effect.logInfo("disposing all instances")

yield* Effect.forEach(

[...cache.entries()],

(item) =>

Effect.gen(function* () {

const exit = yield* Deferred.await(item[1].deferred).pipe(Effect.exit)

if (Exit.isFailure(exit)) {

yield* Effect.logWarning("instance dispose failed", { key: item[0], cause: exit.cause })

yield* removeEntry(item[0], item[1])

return

}

yield* disposeEntry(item[0], item[1], exit.value)

}),

{ discard: true },

)

})

const cachedDisposeAll = yield* Effect.cachedWithTTL(disposeAllOnce(), Duration.zero)

const disposeAll = Effect.fn("InstanceStore.disposeAll")(function* () {

return yield* cachedDisposeAll

})

const provide = <A, E, R>(input: LoadInput, effect: Effect.Effect<A, E, R>): Effect.Effect<A, E, R> =>

load(input).pipe(Effect.flatMap((ctx) => effect.pipe(Effect.provideService(InstanceRef, ctx))))

yield* Effect.addFinalizer(() => disposeAll().pipe(Effect.ignore))

return Service.of({

load,

reload,

dispose,

disposeAll,

provide,

})

}),

)

export const defaultLayer = layer.pipe(Layer.provide(Project.defaultLayer))

export * as InstanceStore from "./instance-store"