declare const require: (name: string) => any
const { describe, expect, test, beforeEach, afterEach, mock, spyOn } = require("bun:test")
import * as connectedProvidersCache from "./connected-providers-cache"

let readConnectedProvidersCacheSpy: ReturnType<typeof spyOn> | undefined
const { shouldRetryError, selectFallbackProvider } = await import("./model-error-classifier")

describe("model-error-classifier", () => {
  beforeEach(() => {
    readConnectedProvidersCacheSpy?.mockRestore()
    readConnectedProvidersCacheSpy = spyOn(connectedProvidersCache, "readConnectedProvidersCache").mockReturnValue(null)
  })

  afterEach(() => {
    readConnectedProvidersCacheSpy?.mockRestore()
    readConnectedProvidersCacheSpy = undefined
  })

  test("treats overloaded retry messages as retryable", () => {
    //#given
    const error = { message: "Provider is overloaded" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(true)
  })

  test("treats cooling-down auto-retry messages as retryable", () => {
    //#given
    const error = {
      message:
        "All credentials for model claude-opus-4-7-thinking are cooling down [retrying in ~5 days attempt #1]",
    }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(true)
  })

  test("selectFallbackProvider prefers first connected provider in preference order", () => {
    //#given
    readConnectedProvidersCacheSpy?.mockReturnValue(["anthropic", "nvidia"])

    //#when
    const provider = selectFallbackProvider(["anthropic", "nvidia"], "nvidia")

    //#then
    expect(provider).toBe("anthropic")
  })

  test("selectFallbackProvider falls back to next connected provider when first is disconnected", () => {
    //#given
    readConnectedProvidersCacheSpy?.mockReturnValue(["nvidia"])

    //#when
    const provider = selectFallbackProvider(["anthropic", "nvidia"])

    //#then
    expect(provider).toBe("nvidia")
  })

  test("selectFallbackProvider uses provider preference order when cache is missing", () => {
    //#given - no cache file

    //#when
    const provider = selectFallbackProvider(["anthropic", "nvidia"], "nvidia")

    //#then
    expect(provider).toBe("anthropic")
  })

  test("selectFallbackProvider uses connected preferred provider when fallback providers are unavailable", () => {
    //#given
    readConnectedProvidersCacheSpy?.mockReturnValue(["provider-x"])

    //#when
    const provider = selectFallbackProvider(["provider-y"], "provider-x")

    //#then
    expect(provider).toBe("provider-x")
  })

  test("treats QuotaExceededError (PascalCase name) as non-retryable STOP error", () => {
    //#given
    const error = { name: "QuotaExceededError" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats quotaexceedederror (lowercase name) as non-retryable STOP error", () => {
    //#given
    const error = { name: "quotaexceedederror" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats InsufficientCreditsError (PascalCase name) as non-retryable STOP error", () => {
    //#given
    const error = { name: "InsufficientCreditsError" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats insufficientcreditserror (lowercase name) as non-retryable STOP error", () => {
    //#given
    const error = { name: "insufficientcreditserror" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats FreeUsageLimitError (PascalCase name) as non-retryable STOP error", () => {
    //#given
    const error = { name: "FreeUsageLimitError" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats freeusagelimiterror (lowercase name) as non-retryable STOP error", () => {
    //#given
    const error = { name: "freeusagelimiterror" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats quota reset message as non-retryable STOP error (no error name)", () => {
    //#given
    const error = { message: "quota will reset after 1 hour" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats quota exceeded message as non-retryable STOP error (no error name)", () => {
    //#given
    const error = { message: "quota exceeded for this billing period" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats usage limit reached message as non-retryable STOP error (no error name)", () => {
    //#given
    const error = { message: "usage limit has been reached for your account" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats insufficient credits message as non-retryable STOP error (no error name)", () => {
    //#given
    const error = { message: "insufficient credits to complete this request" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats 'bad request' message as retryable (GitHub Copilot rolling update)", () => {
    //#given
    const error = { message: "400 Bad Request" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(true)
  })

  test("treats 'bad request' lowercase as retryable", () => {
    //#given
    const error = { message: "bad request: model temporarily unavailable" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(true)
  })

  test("treats subscription quota message as non-retryable", () => {
    //#given
    const error = { message: "Subscription quota exceeded. You can continue using free models." }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("treats HTTP 429 rate limit message as retryable", () => {
    //#given
    const error = { message: "429 Too Many Requests: rate limit reached" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(true)
  })

  test("treats forbidden provider message as retryable", () => {
    //#given
    const error = { message: "Forbidden: Selected provider is forbidden" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(true)
  })

  test("does not treat unrelated forbidden messages as retryable", () => {
    //#given
    const error = { message: "EACCES: forbidden write to /etc/hosts" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })

  test("does not treat unrelated 403 messages as retryable", () => {
    //#given
    const error = { message: "Tool returned HTTP 403 for the requested URL" }

    //#when
    const result = shouldRetryError(error)

    //#then
    expect(result).toBe(false)
  })
})

export {}