import { AISDK } from "@opencode-ai/core/aisdk"
import type { LanguageModelV3 } from "@ai-sdk/provider"
import { describe, expect } from "bun:test"
import { Effect } from "effect"
import { Catalog } from "@opencode-ai/core/catalog"
import { ModelV2 } from "@opencode-ai/core/model"
import { PluginV2 } from "@opencode-ai/core/plugin"
import { PluginHost } from "@opencode-ai/core/plugin/host"
import { GoogleVertexAnthropicPlugin, GoogleVertexPlugin } from "@opencode-ai/core/plugin/provider/google-vertex"
import { ProviderV2 } from "@opencode-ai/core/provider"
import { testEffect } from "../lib/effect"
import { PluginTestLayer } from "./fixture"

const it = testEffect(PluginTestLayer)

const addPlugin = Effect.fn(function* (definition: typeof GoogleVertexAnthropicPlugin | typeof GoogleVertexPlugin) {
  const plugin = yield* PluginV2.Service
  const aisdk = yield* AISDK.Service
  const host = yield* PluginHost.make(plugin)
  yield* definition.effect(host)
})

function withEnv<A, E, R>(vars: Record<string, string | undefined>, effect: () => Effect.Effect<A, E, R>) {
  return Effect.acquireUseRelease(
    Effect.sync(() => {
      const previous = Object.fromEntries(Object.keys(vars).map((key) => [key, process.env[key]]))
      Object.entries(vars).forEach(([key, value]) => {
        if (value === undefined) delete process.env[key]
        else process.env[key] = value
      })
      return previous
    }),
    effect,
    (previous) =>
      Effect.sync(() => {
        Object.entries(previous).forEach(([key, value]) => {
          if (value === undefined) delete process.env[key]
          else process.env[key] = value
        })
      }),
  )
}

function selector(calls: string[]) {
  return (id: string) => {
    calls.push(`languageModel:${id}`)
    return { modelId: id, provider: "languageModel", specificationVersion: "v3" } as unknown as LanguageModelV3
  }
}

describe("GoogleVertexAnthropicPlugin", () => {
  it.effect("resolves legacy project and location env on provider update", () =>
    withEnv(
      {
        GOOGLE_CLOUD_PROJECT: "cloud-project",
        GCP_PROJECT: "gcp-project",
        GCLOUD_PROJECT: "gcloud-project",
        GOOGLE_CLOUD_LOCATION: "cloud-location",
        VERTEX_LOCATION: "vertex-location",
        GOOGLE_VERTEX_LOCATION: "google-vertex-location",
      },
      () =>
        Effect.gen(function* () {
          const catalog = yield* Catalog.Service
          yield* catalog.transform((catalog) =>
            catalog.provider.update(ProviderV2.ID.make("google-vertex-anthropic"), (provider) => {
              provider.package = ProviderV2.aisdk("@ai-sdk/google-vertex/anthropic")
            }),
          )
          yield* addPlugin(GoogleVertexAnthropicPlugin)
          expect((yield* catalog.provider.get(ProviderV2.ID.make("google-vertex-anthropic")))?.settings?.project).toBe(
            "cloud-project",
          )
          expect((yield* catalog.provider.get(ProviderV2.ID.make("google-vertex-anthropic")))?.settings?.location).toBe(
            "cloud-location",
          )
        }),
    ),
  )

  it.effect("keeps configured project and location over env fallback", () =>
    withEnv({ GOOGLE_CLOUD_PROJECT: "env-project", GOOGLE_CLOUD_LOCATION: "env-location" }, () =>
      Effect.gen(function* () {
        const catalog = yield* Catalog.Service
        yield* catalog.transform((catalog) =>
          catalog.provider.update(ProviderV2.ID.make("google-vertex-anthropic"), (provider) => {
            provider.package = ProviderV2.aisdk("@ai-sdk/google-vertex/anthropic")
            provider.settings = { ...provider.settings, project: "configured-project", location: "configured-location" }
          }),
        )
        yield* addPlugin(GoogleVertexAnthropicPlugin)
        expect((yield* catalog.provider.get(ProviderV2.ID.make("google-vertex-anthropic")))?.settings?.project).toBe(
          "configured-project",
        )
        expect((yield* catalog.provider.get(ProviderV2.ID.make("google-vertex-anthropic")))?.settings?.location).toBe(
          "configured-location",
        )
      }),
    ),
  )

  it.effect("creates SDKs from legacy env fallback and default location", () =>
    withEnv(
      {
        GOOGLE_CLOUD_PROJECT: undefined,
        GCP_PROJECT: "gcp-project",
        GCLOUD_PROJECT: "gcloud-project",
        GOOGLE_CLOUD_LOCATION: undefined,
        VERTEX_LOCATION: undefined,
        GOOGLE_VERTEX_LOCATION: "ignored-location",
      },
      () =>
        Effect.gen(function* () {
          const plugin = yield* PluginV2.Service
          const aisdk = yield* AISDK.Service
          yield* addPlugin(GoogleVertexAnthropicPlugin)
          const result = yield* aisdk.runSDK({
            model: ModelV2.Info.make({
              ...ModelV2.Info.empty(
                ProviderV2.ID.make("google-vertex-anthropic"),
                ModelV2.ID.make("claude-sonnet-4-5"),
              ),
              modelID: ModelV2.ID.make("claude-sonnet-4-5"),
              package: "aisdk:test-provider",
            }),
            package: "@ai-sdk/google-vertex/anthropic",
            options: { name: "google-vertex-anthropic" },
          })
          expect(result.sdk.languageModel("claude-sonnet-4-5").config.baseURL).toBe(
            "https://aiplatform.googleapis.com/v1/projects/gcp-project/locations/global/publishers/anthropic/models",
          )
        }),
    ),
  )

  it.effect("uses GOOGLE_CLOUD_LOCATION before VERTEX_LOCATION when creating SDKs", () =>
    withEnv(
      { GOOGLE_CLOUD_PROJECT: "project", GOOGLE_CLOUD_LOCATION: "cloud-location", VERTEX_LOCATION: "vertex-location" },
      () =>
        Effect.gen(function* () {
          const plugin = yield* PluginV2.Service
          const aisdk = yield* AISDK.Service
          yield* addPlugin(GoogleVertexAnthropicPlugin)
          const result = yield* aisdk.runSDK({
            model: ModelV2.Info.make({
              ...ModelV2.Info.empty(
                ProviderV2.ID.make("google-vertex-anthropic"),
                ModelV2.ID.make("claude-sonnet-4-5"),
              ),
              modelID: ModelV2.ID.make("claude-sonnet-4-5"),
              package: "aisdk:test-provider",
            }),
            package: "@ai-sdk/google-vertex/anthropic",
            options: { name: "google-vertex-anthropic" },
          })
          expect(result.sdk.languageModel("claude-sonnet-4-5").config.baseURL).toBe(
            "https://cloud-location-aiplatform.googleapis.com/v1/projects/project/locations/cloud-location/publishers/anthropic/models",
          )
        }),
    ),
  )

  it.effect("creates SDKs for google-vertex Anthropic models with multi-region endpoints", () =>
    Effect.gen(function* () {
      const plugin = yield* PluginV2.Service
      const aisdk = yield* AISDK.Service
      yield* addPlugin(GoogleVertexAnthropicPlugin)
      const result = yield* aisdk.runSDK({
        model: ModelV2.Info.make({
          ...ModelV2.Info.empty(ProviderV2.ID.make("google-vertex"), ModelV2.ID.make("claude-sonnet-4-5")),
          modelID: ModelV2.ID.make("claude-sonnet-4-5"),
          package: "aisdk:test-provider",
        }),
        package: "@ai-sdk/google-vertex/anthropic",
        options: { name: "google-vertex", project: "project", location: "eu" },
      })
      expect(result.sdk.languageModel("claude-sonnet-4-5").config.baseURL).toBe(
        "https://aiplatform.eu.rep.googleapis.com/v1/projects/project/locations/eu/publishers/anthropic/models",
      )
    }),
  )

  it.effect("keeps configured baseURL for google-vertex Anthropic models", () =>
    Effect.gen(function* () {
      const plugin = yield* PluginV2.Service
      const aisdk = yield* AISDK.Service
      yield* addPlugin(GoogleVertexAnthropicPlugin)
      const result = yield* aisdk.runSDK({
        model: ModelV2.Info.make({
          ...ModelV2.Info.empty(ProviderV2.ID.make("google-vertex"), ModelV2.ID.make("claude-sonnet-4-5")),
          modelID: ModelV2.ID.make("claude-sonnet-4-5"),
          package: "aisdk:test-provider",
        }),
        package: "@ai-sdk/google-vertex/anthropic",
        options: { name: "google-vertex", project: "project", location: "eu", baseURL: "https://proxy.example/v1" },
      })
      expect(result.sdk.languageModel("claude-sonnet-4-5").config.baseURL).toBe("https://proxy.example/v1")
    }),
  )

  it.effect("selects google-vertex Anthropic language models through V2 plugins", () =>
    Effect.gen(function* () {
      const plugin = yield* PluginV2.Service
      const aisdk = yield* AISDK.Service
      yield* addPlugin(GoogleVertexPlugin)
      yield* addPlugin(GoogleVertexAnthropicPlugin)
      const sdkResult = yield* aisdk.runSDK({
        model: ModelV2.Info.make({
          ...ModelV2.Info.empty(ProviderV2.ID.make("google-vertex"), ModelV2.ID.make(" claude-sonnet-4-5 ")),
          modelID: ModelV2.ID.make(" claude-sonnet-4-5 "),
          package: "aisdk:test-provider",
        }),
        package: "@ai-sdk/google-vertex/anthropic",
        options: { name: "google-vertex", project: "project", location: "us" },
      })
      const languageResult = yield* aisdk.runLanguage({
        model: ModelV2.Info.make({
          ...ModelV2.Info.empty(ProviderV2.ID.make("google-vertex"), ModelV2.ID.make(" claude-sonnet-4-5 ")),
          modelID: ModelV2.ID.make(" claude-sonnet-4-5 "),
          package: "aisdk:test-provider",
        }),
        sdk: sdkResult.sdk,
        options: {},
      })
      const language = languageResult.language as unknown as { config: { baseURL: string }; modelId: string }
      expect(language.config.baseURL).toBe(
        "https://aiplatform.us.rep.googleapis.com/v1/projects/project/locations/us/publishers/anthropic/models",
      )
      expect(language.modelId).toBe("claude-sonnet-4-5")
    }),
  )

  it.effect("trims model IDs before selecting language models", () =>
    Effect.gen(function* () {
      const plugin = yield* PluginV2.Service
      const aisdk = yield* AISDK.Service
      const calls: string[] = []
      yield* addPlugin(GoogleVertexAnthropicPlugin)
      yield* aisdk.runLanguage({
        model: ModelV2.Info.make({
          ...ModelV2.Info.empty(ProviderV2.ID.make("google-vertex-anthropic"), ModelV2.ID.make(" claude-sonnet-4-5 ")),
          modelID: ModelV2.ID.make(" claude-sonnet-4-5 "),
          package: "aisdk:test-provider",
        }),
        sdk: { languageModel: selector(calls) },
        options: {},
      })
      expect(calls).toEqual(["languageModel:claude-sonnet-4-5"])
    }),
  )

  it.effect("ignores non Vertex Anthropic providers for language selection", () =>
    Effect.gen(function* () {
      const plugin = yield* PluginV2.Service
      const aisdk = yield* AISDK.Service
      const calls: string[] = []
      yield* addPlugin(GoogleVertexAnthropicPlugin)
      const result = yield* aisdk.runLanguage({
        model: ModelV2.Info.make({
          ...ModelV2.Info.empty(ProviderV2.ID.make("google-vertex"), ModelV2.ID.make("claude-sonnet-4-5")),
          modelID: ModelV2.ID.make("claude-sonnet-4-5"),
          package: "aisdk:test-provider",
        }),
        sdk: { languageModel: selector(calls) },
        options: {},
      })
      expect(calls).toEqual([])
      expect(result.language).toBeUndefined()
    }),
  )
})