{"version":3,"file":"lazy.d.ts","sourceRoot":"","sources":["../../src/api/lazy.ts"],"names":[],"mappings":"AAAA,OAAO,KAAK,EAAE,GAAG,EAAoB,qBAAqB,EAAE,KAAK,EAAE,eAAe,EAAE,MAAM,aAAa,CAAC;AACxG,OAAO,EAAE,2BAA2B,EAAE,MAAM,0BAA0B,CAAC;AAuCvE;;;;GAIG;AACH,wBAAgB,UAAU,CACzB,KAAK,EAAE,KAAK,CAAC,GAAG,CAAC,EACjB,KAAK,EAAE,MAAM,OAAO,CAAC,aAAa,CAAC,qBAAqB,CAAC,CAAC,GACxD,2BAA2B,CAY7B;AAED;;;;GAIG;AACH,MAAM,WAAW,mBAAmB;IACnC,aAAa,CAAC,EAAE,OAAO,CAAC;IACxB,cAAc,CAAC,EAAE,OAAO,CAAC;CACzB;AAED,wBAAgB,OAAO,CAAC,IAAI,EAAE,MAAM,OAAO,CAAC,eAAe,CAAC,EAAE,YAAY,CAAC,EAAE,mBAAmB,GAAG,eAAe,CAyBjH","sourcesContent":["import type { Api, AssistantMessage, AssistantMessageEvent, Model, ProviderStreams } from \"../types.ts\";\nimport { AssistantMessageEventStream } from \"../utils/event-stream.ts\";\n\nfunction createSetupErrorMessage(model: Model<Api>, error: unknown): AssistantMessage {\n\treturn {\n\t\trole: \"assistant\",\n\t\tcontent: [],\n\t\tapi: model.api,\n\t\tprovider: model.provider,\n\t\tmodel: model.id,\n\t\tusage: {\n\t\t\tinput: 0,\n\t\t\toutput: 0,\n\t\t\tcacheRead: 0,\n\t\t\tcacheWrite: 0,\n\t\t\ttotalTokens: 0,\n\t\t\tcost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },\n\t\t},\n\t\tstopReason: \"error\",\n\t\terrorMessage: error instanceof Error ? error.message : String(error),\n\t\ttimestamp: Date.now(),\n\t};\n}\n\nfunction hasResult(\n\tsource: AsyncIterable<AssistantMessageEvent>,\n): source is AsyncIterable<AssistantMessageEvent> & { result(): Promise<AssistantMessage> } {\n\treturn typeof (source as { result?: unknown }).result === \"function\";\n}\n\nasync function forwardStream(\n\ttarget: AssistantMessageEventStream,\n\tsource: AsyncIterable<AssistantMessageEvent>,\n): Promise<void> {\n\tfor await (const event of source) {\n\t\ttarget.push(event);\n\t}\n\ttarget.end(hasResult(source) ? await source.result() : undefined);\n}\n\n/**\n * Returns a stream synchronously while running async setup (auth resolution,\n * lazy module loading) behind it. Setup failures terminate the stream with an\n * error event.\n */\nexport function lazyStream(\n\tmodel: Model<Api>,\n\tsetup: () => Promise<AsyncIterable<AssistantMessageEvent>>,\n): AssistantMessageEventStream {\n\tconst outer = new AssistantMessageEventStream();\n\n\tsetup()\n\t\t.then((inner) => forwardStream(outer, inner))\n\t\t.catch((error) => {\n\t\t\tconst message = createSetupErrorMessage(model, error);\n\t\t\touter.push({ type: \"error\", reason: \"error\", error: message });\n\t\t\touter.end(message);\n\t\t});\n\n\treturn outer;\n}\n\n/**\n * Wraps a dynamically imported API implementation module as `ProviderStreams`.\n * The module loads on first stream call; the host's import cache deduplicates\n * loads. Load failures terminate the returned stream with an error event.\n */\nexport interface LazyApiCapabilities {\n\tfetchDeferred?: boolean;\n\tcancelDeferred?: boolean;\n}\n\nexport function lazyApi(load: () => Promise<ProviderStreams>, capabilities?: LazyApiCapabilities): ProviderStreams {\n\tconst api: ProviderStreams = {\n\t\tstream: (model, context, options) =>\n\t\t\tlazyStream(model, async () => (await load()).stream(model, context, options)),\n\t\tstreamSimple: (model, context, options) =>\n\t\t\tlazyStream(model, async () => (await load()).streamSimple(model, context, options)),\n\t};\n\n\tif (capabilities?.fetchDeferred) {\n\t\tapi.fetchDeferred = (model, handle, options) =>\n\t\t\tlazyStream(model, async () => {\n\t\t\t\tconst implementation = await load();\n\t\t\t\tif (!implementation.fetchDeferred) throw new Error(\"API does not support deferred responses\");\n\t\t\t\treturn implementation.fetchDeferred(model, handle, options);\n\t\t\t});\n\t}\n\tif (capabilities?.cancelDeferred) {\n\t\tapi.cancelDeferred = async (model, handle, options) => {\n\t\t\tconst implementation = await load();\n\t\t\tif (!implementation.cancelDeferred) throw new Error(\"API cannot cancel deferred responses\");\n\t\t\tawait implementation.cancelDeferred(model, handle, options);\n\t\t};\n\t}\n\n\treturn api;\n}\n"]}