import { Flag } from "@opencode-ai/core/flag/flag"

import { InstallationChannel, InstallationVersion } from "@opencode-ai/core/installation/version"

export type Backend = "effect-httpapi" | "hono"

export type Selection = {

backend: Backend

reason: "env" | "stable" | "explicit"

}

export type Attributes = ReturnType<typeof attributes>

export function select(): Selection {

if (Flag.OPENCODE_EXPERIMENTAL_HTTPAPI) return { backend: "effect-httpapi", reason: "env" }

return { backend: "hono", reason: "stable" }

}

export function attributes(selection: Selection): Record<string, string> {

return {

"opencode.server.backend": selection.backend,

"opencode.server.backend.reason": selection.reason,

"opencode.installation.channel": InstallationChannel,

"opencode.installation.version": InstallationVersion,

}

}

export function force(selection: Selection, backend: Backend): Selection {

return {

backend,

reason: selection.backend === backend ? selection.reason : "explicit",

}

}