import { expect, test } from "vitest"

import {
  createTaggedErrorClass,
  matchTaggedError,
  matchTaggedErrorPartial,
} from "#Source/exception/index.ts"

class NetworkError extends createTaggedErrorClass("Network")<{
  message: string
  status: number
}>() {
  //
}

class ValidationError extends createTaggedErrorClass("Validation")<{
  message: string
  field: string
}>() {
  //
}

type ExampleTaggedError = NetworkError | ValidationError

test("matchTaggedError dispatches by tag and throws when a handler is missing", () => {
  const example1 = new NetworkError({
    message: "bad gateway",
    status: 502,
  }) as ExampleTaggedError
  const example2 = new ValidationError({
    message: "invalid email",
    field: "email",
  }) as ExampleTaggedError
  const example3 = matchTaggedError(example1, {
    Network: (error) => `${error.tag}:${error.data.status}`,
    Validation: (error) => `${error.tag}:${error.data.field}`,
  })
  const example4 = matchTaggedError(example2, {
    Network: (error) => `${error.tag}:${error.data.status}`,
    Validation: (error) => `${error.tag}:${error.data.field}`,
  })

  expect(example3).toBe("Network:502")
  expect(example4).toBe("Validation:email")
  expect(() => {
    // @ts-expect-error Testing runtime error when handler is missing
    return matchTaggedError(example2, {
      Network: (error) => error.data.status,
    })
  }).toThrow("No handler for tag: Validation")
})

test("matchTaggedErrorPartial uses a fallback for unhandled tags", () => {
  const example1 = new NetworkError({
    message: "bad gateway",
    status: 502,
  }) as ExampleTaggedError
  const example2 = new ValidationError({
    message: "invalid email",
    field: "email",
  }) as ExampleTaggedError
  const example3 = matchTaggedErrorPartial(
    example1,
    {
      Network: (error) => `${error.tag}:${error.data.status}`,
    },
    (error) => `${error.tag}:${error.message}`,
  )
  const example4 = matchTaggedErrorPartial(
    example2,
    {
      Network: (error) => `${error.tag}:${error.data.status}`,
    },
    (error) => `${error.tag}:${error.data.field}`,
  )

  expect(example3).toBe("Network:502")
  expect(example4).toBe("Validation:email")
})