import type { NotificationMessage, NotificationProvider } from "@rakazo/adapter-kit";
import { runContinueJob } from "@rakazo/adapter-kit";
import type { MessageBlock } from "@rakazo/contracts";
import { redactSecrets } from "@rakazo/core";
import type { Prisma, PrismaClient } from "@rakazo/db";
import { appendEventInTransaction, createThreadMessageInTransaction } from "@rakazo/db";
import { getLogger } from "@rakazo/logging";
import { withComputerScreenAvailability } from "./computer-screens.js";
import type { ExecutorDeps } from "./executor.js";
import { sanitizeTextBlocks } from "./prose-handoff-recovery.js";
import { TAKEOVER_RESUME_CHECKPOINTS, type TakeoverResumeCheckpoint } from "./takeover-resume.js";

// Helper used by publishMessage — also exported so executor.ts can call it directly
export async function persistMessageInTransaction(
  tx: Prisma.TransactionClient,
  run: { id: string; spaceId: string; threadId: string; botId: string },
  role: "user" | "bot" | "system",
  blocks: MessageBlock[],
  markUnread?: boolean,
  clientNonce?: string,
) {
  const message = await createThreadMessageInTransaction(tx, {
    threadId: run.threadId,
    role,
    blocks,
    botId: run.botId,
    runId: run.id,
    markUnread,
    clientNonce,
  });
  const event = await appendEventInTransaction(tx, {
    spaceId: run.spaceId,
    threadId: run.threadId,
    botId: run.botId,
    type: "thread.message.created",
    runId: run.id,
    payload: { messageId: message.id, role, blocks },
  });
  return { message, eventSeq: event.seq };
}

export async function computerScreenToolResult(
  work: () => Promise<unknown>,
  finish?: (result: unknown) => Promise<unknown>,
) {
  const result = await withComputerScreenAvailability(work);
  return finish ? finish(result) : result;
}

export async function runNotificationsEnabled(
  prisma: PrismaClient,
  run: { spaceId: string; userId: string; botId: string; threadId: string },
): Promise<boolean> {
  const source = await prisma.run.findFirst({
    where: {
      botId: run.botId,
      threadId: run.threadId,
      spaceId: run.spaceId,
      userId: run.userId,
    },
    select: {
      bot: { select: { notifyOnFinish: true } },
      thread: { select: { groupId: true } },
    },
  });
  return Boolean(source && (source.thread.groupId || source.bot.notifyOnFinish));
}

export async function notifyRun(
  deps: ExecutorDeps,
  run: { spaceId: string; userId: string; botId: string; threadId: string },
  message: NotificationMessage,
) {
  if (!deps.notifications) return;
  const enabled = await runNotificationsEnabled(deps.prisma, run).catch((error) => {
    getLogger().error("notification preference lookup", error);
    return false;
  });
  if (!enabled) return;
  await deps.notifications
    .send(message, {
      operationId: "notify",
      traceId: run.botId,
      spaceId: run.spaceId,
      userId: run.userId,
      botId: run.botId,
      signal: new AbortController().signal,
    })
    .catch((error) => {
      getLogger().error("run notification", error);
    });
}

export async function renewRunLease(
  deps: ExecutorDeps,
  runId: string,
  workerId: string,
  fence: number,
): Promise<boolean> {
  const renewed = await deps.prisma.run.updateMany({
    where: { id: runId, status: "running", leaseOwner: workerId, leaseFence: fence },
    data: { leaseExpiresAt: new Date(Date.now() + 5 * 60_000) },
  });
  return renewed.count === 1;
}

export function computerRetryDelay(fence: number): number {
  return Math.min(10_000, 250 * 2 ** Math.min(Math.max(fence - 1, 0), 5));
}

export function computerRunRequeueData(
  resumeCheckpoint: TakeoverResumeCheckpoint | null,
  error: string | null = null,
  heldForTakeover = false,
) {
  return {
    status:
      heldForTakeover && !resumeCheckpoint ? ("waiting_takeover" as const) : ("queued" as const),
    error,
    leaseOwner: null,
    leaseExpiresAt: null,
    checkpoint: resumeCheckpoint,
  };
}

export async function writeComputerRunRequeue(
  deps: ExecutorDeps,
  runId: string,
  workerId: string,
  fence: number,
  resumeCheckpoint: TakeoverResumeCheckpoint | null,
  heldForTakeover = false,
  error: string | null = null,
): Promise<boolean> {
  const whereLease = {
    id: runId,
    status: "running" as const,
    leaseOwner: workerId,
    leaseFence: fence,
  };
  const releasedHold = {
    status: "queued" as const,
    error,
    leaseOwner: null,
    leaseExpiresAt: null,
  };
  const preserve = await deps.prisma.run.updateMany({
    where: {
      ...whereLease,
      checkpoint: { in: [...TAKEOVER_RESUME_CHECKPOINTS] },
    },
    data: releasedHold,
  });
  if (preserve.count === 1) return true;
  const planned = await deps.prisma.run.updateMany({
    where: { ...whereLease, checkpoint: null },
    data: computerRunRequeueData(resumeCheckpoint, error, heldForTakeover),
  });
  if (planned.count === 1) return true;
  const retried = await deps.prisma.run.updateMany({
    where: {
      ...whereLease,
      checkpoint: { in: [...TAKEOVER_RESUME_CHECKPOINTS] },
    },
    data: releasedHold,
  });
  return retried.count === 1;
}

export async function requeueComputerRun(
  deps: ExecutorDeps,
  runId: string,
  workerId: string,
  fence: number,
  resumeCheckpoint: TakeoverResumeCheckpoint | null,
  heldForTakeover = false,
): Promise<void> {
  const released = await writeComputerRunRequeue(
    deps,
    runId,
    workerId,
    fence,
    resumeCheckpoint,
    heldForTakeover,
  );
  if (!released) return;
  await deps.jobs.enqueue({
    ...runContinueJob(runId),
    availableAt: new Date(Date.now() + computerRetryDelay(fence)),
  });
}

export function redactBlocks(blocks: MessageBlock[], secrets: string[]): MessageBlock[] {
  return sanitizeTextBlocks(
    blocks.map((block) => {
      if (block.kind === "text") {
        return { kind: "text" as const, text: redactSecrets(block.text, secrets) };
      }
      if (block.kind === "bot_message_sent" || block.kind === "bot_message_received") {
        return { ...block, text: redactSecrets(block.text, secrets) };
      }
      return block;
    }),
  );
}

export async function publishMessage(
  deps: ExecutorDeps,
  run: { id: string; spaceId: string; threadId: string; botId: string },
  role: "user" | "bot" | "system",
  blocks: MessageBlock[],
  markUnread?: boolean,
  clientNonce?: string,
) {
  const committed = await deps.prisma.$transaction((tx) =>
    persistMessageInTransaction(tx, run, role, blocks, markUnread, clientNonce),
  );
  await deps.events.notify(run.threadId, committed.eventSeq).catch((error) => {
    getLogger().error("thread message realtime notification", error);
  });
  return committed.message;
}