import { afterEach, describe, expect, test } from "bun:test"
import { Flag } from "@opencode-ai/core/flag/flag"
import { Instance } from "../../src/project/instance"
import { FileApi, FilePaths } from "../../src/server/routes/instance/httpapi/file"
import { PublicApi } from "../../src/server/routes/instance/httpapi/public"
import { Server } from "../../src/server/server"
import * as Log from "@opencode-ai/core/util/log"
import { OpenApi } from "effect/unstable/httpapi"
import { resetDatabase } from "../fixture/db"
import { tmpdir } from "../fixture/fixture"

void Log.init({ print: false })

const original = {
  KILO_EXPERIMENTAL_HTTPAPI: Flag.KILO_EXPERIMENTAL_HTTPAPI,
  KILO_SERVER_PASSWORD: Flag.KILO_SERVER_PASSWORD,
  KILO_SERVER_USERNAME: Flag.KILO_SERVER_USERNAME,
}

const methods = ["get", "post", "put", "delete", "patch"] as const

function app(input?: { password?: string; username?: string }) {
  Flag.KILO_EXPERIMENTAL_HTTPAPI = true
  Flag.KILO_SERVER_PASSWORD = input?.password
  Flag.KILO_SERVER_USERNAME = input?.username
  return Server.Default().app
}

function openApiRouteKeys(spec: { paths: Record<string, Partial<Record<(typeof methods)[number], unknown>>> }) {
  return Object.entries(spec.paths)
    .flatMap(([path, item]) =>
      methods.filter((method) => item[method]).map((method) => `${method.toUpperCase()} ${path}`),
    )
    .sort()
}

function openApiParameters(spec: { paths: Record<string, Partial<Record<(typeof methods)[number], Operation>>> }) {
  return Object.fromEntries(
    Object.entries(spec.paths).flatMap(([path, item]) =>
      methods
        .filter((method) => item[method])
        .map((method) => [
          `${method.toUpperCase()} ${path}`,
          (item[method]?.parameters ?? [])
            .map(parameterKey)
            .filter((param) => param !== undefined)
            .sort(),
        ]),
    ),
  )
}

function openApiRequestBodies(spec: { paths: Record<string, Partial<Record<(typeof methods)[number], Operation>>> }) {
  return Object.fromEntries(
    Object.entries(spec.paths).flatMap(([path, item]) =>
      methods
        .filter((method) => item[method])
        .map((method) => [`${method.toUpperCase()} ${path}`, requestBodyKey(item[method]?.requestBody)]),
    ),
  )
}

type Operation = {
  parameters?: unknown[]
  requestBody?: unknown
}

type RequestBody = {
  content?: Record<string, { schema?: { $ref?: string; type?: string } }>
  required?: boolean
}

function parameterKey(param: unknown) {
  if (!param || typeof param !== "object" || !("in" in param) || !("name" in param)) return
  if (typeof param.in !== "string" || typeof param.name !== "string") return
  return `${param.in}:${param.name}:${"required" in param && param.required === true}`
}

function requestBodyKey(body: unknown) {
  if (!body || typeof body !== "object" || !("content" in body)) return ""
  const requestBody = body as RequestBody
  return JSON.stringify({
    required: requestBody.required === true,
    content: Object.entries(requestBody.content ?? {})
      .map(([type, value]) => [type, value.schema?.$ref ?? value.schema?.type ?? "inline"])
      .sort(),
  })
}

function authorization(username: string, password: string) {
  return `Basic ${Buffer.from(`${username}:${password}`).toString("base64")}`
}

function fileUrl(input?: { directory?: string; token?: string }) {
  const url = new URL(`http://localhost${FilePaths.content}`)
  url.searchParams.set("path", "hello.txt")
  if (input?.directory) url.searchParams.set("directory", input.directory)
  if (input?.token) url.searchParams.set("auth_token", input.token)
  return url
}

afterEach(async () => {
  Flag.KILO_EXPERIMENTAL_HTTPAPI = original.KILO_EXPERIMENTAL_HTTPAPI
  Flag.KILO_SERVER_PASSWORD = original.KILO_SERVER_PASSWORD
  Flag.KILO_SERVER_USERNAME = original.KILO_SERVER_USERNAME
  await Instance.disposeAll()
  await resetDatabase()
})

describe("HttpApi server", () => {
  // kilocode_change start - skip Effect HttpApi parity tests until Kilo overlay routes are migrated.
  // These tests verify every Hono route has an Effect HttpApi contract. Kilo-specific routes
  // (/config/warnings, /indexing/status, /kilo/claw/*, /kilo/cloud-sessions, /experimental/worktree/diff*)
  // aren't yet wired into PublicApi. The Effect HttpApi bridge is gated behind KILO_EXPERIMENTAL_HTTPAPI
  // and is not enabled in any production client (VS Code extension, JetBrains, TUI, desktop all use Hono).
  // Follow-up: migrate Kilo overlay routes onto the Effect HttpApi bridge.
  test.skip("covers every generated OpenAPI route with Effect HttpApi contracts", async () => {
    const honoRoutes = openApiRouteKeys(await Server.openapi())
    const effectRoutes = openApiRouteKeys(OpenApi.fromApi(PublicApi))

    expect(honoRoutes.filter((route) => !effectRoutes.includes(route))).toEqual([])
    expect(effectRoutes.filter((route) => !honoRoutes.includes(route))).toEqual([])
  })

  test.skip("matches generated OpenAPI route parameters", async () => {
    const hono = openApiParameters(await Server.openapi())
    const effect = openApiParameters(OpenApi.fromApi(PublicApi))

    expect(
      Object.keys(hono)
        .filter((route) => JSON.stringify(hono[route]) !== JSON.stringify(effect[route]))
        .map((route) => ({ route, hono: hono[route], effect: effect[route] })),
    ).toEqual([])
  })

  test.skip("matches generated OpenAPI request body shape", async () => {
    const hono = openApiRequestBodies(await Server.openapi())
    const effect = openApiRequestBodies(OpenApi.fromApi(PublicApi))

    expect(
      Object.keys(hono)
        .filter((route) => hono[route] !== effect[route])
        .map((route) => ({ route, hono: hono[route], effect: effect[route] })),
    ).toEqual([])
  })
  // kilocode_change end

  test("allows requests when auth is disabled", async () => {
    await using tmp = await tmpdir({ git: true })
    await Bun.write(`${tmp.path}/hello.txt`, "hello")

    const response = await app().request(fileUrl(), {
      headers: {
        "x-kilo-directory": tmp.path,
      },
    })

    expect(response.status).toBe(200)
    expect(await response.json()).toMatchObject({ content: "hello" })
  })

  test("provides instance context to bridged handlers", async () => {
    await using tmp = await tmpdir({ git: true })

    const response = await app().request("/project/current", {
      headers: {
        "x-kilo-directory": tmp.path,
      },
    })

    expect(response.status).toBe(200)
    expect(await response.json()).toMatchObject({ worktree: tmp.path })
  })

  test("requires credentials when auth is enabled", async () => {
    await using tmp = await tmpdir({ git: true })
    await Bun.write(`${tmp.path}/hello.txt`, "hello")

    const [missing, bad, good] = await Promise.all([
      app({ password: "secret" }).request(fileUrl(), {
        headers: { "x-kilo-directory": tmp.path },
      }),
      app({ password: "secret" }).request(fileUrl(), {
        headers: {
          authorization: authorization("opencode", "wrong"),
          "x-kilo-directory": tmp.path,
        },
      }),
      app({ password: "secret" }).request(fileUrl(), {
        headers: {
          authorization: authorization("opencode", "secret"),
          "x-kilo-directory": tmp.path,
        },
      }),
    ])

    expect(missing.status).toBe(401)
    expect(bad.status).toBe(401)
    expect(good.status).toBe(200)
  })

  test("accepts auth_token query credentials", async () => {
    await using tmp = await tmpdir({ git: true })
    await Bun.write(`${tmp.path}/hello.txt`, "hello")

    const response = await app({ password: "secret" }).request(
      fileUrl({ token: Buffer.from("opencode:secret").toString("base64") }),
      {
        headers: {
          "x-kilo-directory": tmp.path,
        },
      },
    )

    expect(response.status).toBe(200)
  })

  test("selects instance from query before directory header", async () => {
    await using header = await tmpdir({ git: true })
    await using query = await tmpdir({ git: true })
    await Bun.write(`${header.path}/hello.txt`, "header")
    await Bun.write(`${query.path}/hello.txt`, "query")

    const response = await app().request(fileUrl({ directory: query.path }), {
      headers: {
        "x-kilo-directory": header.path,
      },
    })

    expect(response.status).toBe(200)
    expect(await response.json()).toMatchObject({ content: "query" })
  })
})