import { Effect } from "effect"

import { ModelV2 } from "../../model"

import { ProviderV2 } from "../../provider"

import type { PluginContext } from "@opencode-ai/plugin/v2/effect"

export const GithubCopilotPlugin = {

id: "github-copilot",

effect: Effect.fn(function* (ctx: PluginContext) {

yield* ctx.catalog.transform(

Effect.fn(function* (evt) {

const item = evt.provider.get(ProviderV2.ID.githubCopilot)

if (!item || !item.models.has(ModelV2.ID.make("gpt-5-chat-latest"))) return

evt.model.update(item.provider.id, ModelV2.ID.make("gpt-5-chat-latest"), (model) => {

// This chat-only alias conflicts with the Copilot GPT-5 Responses route,

// so hide it only for Copilot rather than for every provider catalog.

model.enabled = false

})

}),

)

yield* ctx.aisdk.sdk(

Effect.fn(function* (evt) {

if (evt.package !== "@ai-sdk/github-copilot") return

const mod = yield* Effect.promise(() => import("../../github-copilot/copilot-provider"))

evt.sdk = mod.createOpenaiCompatible(evt.options)

}),

)

yield* ctx.aisdk.language(

Effect.fn(function* (evt) {

if (evt.model.providerID !== ProviderV2.ID.githubCopilot) return

if (evt.sdk.responses === undefined && evt.sdk.chat === undefined) {

evt.language = evt.sdk.languageModel(evt.model.api.id)

return

}

if (evt.options.endpoint === "responses" && evt.sdk.responses) {

evt.language = evt.sdk.responses(evt.model.api.id)

return

}

if (evt.options.endpoint === "chat" && evt.sdk.chat) {

evt.language = evt.sdk.chat(evt.model.api.id)

return

}

const match = /^gpt-(\d+)/.exec(evt.model.api.id)

// Copilot supports Responses for GPT-5 class models, except mini variants

// which still need the chat-completions endpoint.

evt.language =

match && Number(match[1]) >= 5 && !evt.model.api.id.startsWith("gpt-5-mini") && evt.sdk.responses

? evt.sdk.responses(evt.model.api.id)

: evt.sdk.chat(evt.model.api.id)

}),

)

}),

}