import path from "path"
import { describe, expect, test } from "bun:test"
import { Instance } from "../../src/project/instance"
import { Session } from "../../src/session"
import { MessageV2 } from "../../src/session/message-v2"
import { SessionPrompt } from "../../src/session/prompt"
import { tmpdir } from "../fixture/fixture"

describe("session.prompt missing file", () => {
  test("does not fail the prompt when a file part is missing", async () => {
    await using tmp = await tmpdir({
      git: true,
      config: {
        agent: {
          build: {
            model: "openai/gpt-5.2",
          },
        },
      },
    })

    await Instance.provide({
      directory: tmp.path,
      fn: async () => {
        const session = await Session.create({})

        const missing = path.join(tmp.path, "does-not-exist.ts")
        const msg = await SessionPrompt.prompt({
          sessionID: session.id,
          agent: "build",
          noReply: true,
          parts: [
            { type: "text", text: "please review @does-not-exist.ts" },
            {
              type: "file",
              mime: "text/plain",
              url: `file://${missing}`,
              filename: "does-not-exist.ts",
            },
          ],
        })

        if (msg.info.role !== "user") throw new Error("expected user message")

        const hasFailure = msg.parts.some(
          (part) => part.type === "text" && part.synthetic && part.text.includes("Read tool failed to read"),
        )
        expect(hasFailure).toBe(true)

        await Session.remove(session.id)
      },
    })
  })

  test("keeps stored part order stable when file resolution is async", async () => {
    await using tmp = await tmpdir({
      git: true,
      config: {
        agent: {
          build: {
            model: "openai/gpt-5.2",
          },
        },
      },
    })

    await Instance.provide({
      directory: tmp.path,
      fn: async () => {
        const session = await Session.create({})

        const missing = path.join(tmp.path, "still-missing.ts")
        const msg = await SessionPrompt.prompt({
          sessionID: session.id,
          agent: "build",
          noReply: true,
          parts: [
            {
              type: "file",
              mime: "text/plain",
              url: `file://${missing}`,
              filename: "still-missing.ts",
            },
            { type: "text", text: "after-file" },
          ],
        })

        if (msg.info.role !== "user") throw new Error("expected user message")

        const stored = await MessageV2.get({
          sessionID: session.id,
          messageID: msg.info.id,
        })
        const text = stored.parts.filter((part) => part.type === "text").map((part) => part.text)

        expect(text[0]?.startsWith("Called the Read tool with the following input:")).toBe(true)
        expect(text[1]?.includes("Read tool failed to read")).toBe(true)
        expect(text[2]).toBe("after-file")

        await Session.remove(session.id)
      },
    })
  })
})