"use server";

import { auth } from "@/auth";
import { db } from "@/lib/db";
import { revalidatePath } from "next/cache";
import { z } from "zod";
import { recalcShotStatus } from "@/lib/shot-status";
import { notifyNewVersionUploaded } from "@/lib/notifications";
import { slackNotifyVersionUploaded } from "@/lib/slack";

const createVersionSchema = z.object({
  taskId: z.string().cuid(),
  fileUrl: z.string().min(1),
  fileName: z.string(),
  fileSize: z.number().optional(),
  mimeType: z.string().optional(),
  thumbnailUrl: z.string().min(1).optional().or(z.literal("")),
  fps: z.number().default(24),
  duration: z.number().optional(),
  frameCount: z.number().int().optional(),
  width: z.number().int().optional(),
  height: z.number().int().optional(),
  notes: z.string().optional(),
});

export async function createVersion(data: z.infer<typeof createVersionSchema>) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");

  const parsed = createVersionSchema.parse(data);

  // All versions must belong to a task
  const task = await db.task.findUnique({
    where: { id: parsed.taskId },
    include: { project: true, shot: { select: { id: true, shotCode: true } } },
  });
  if (!task) throw new Error("Task not found");

  const projectId = task.projectId;
  const slackWebhook = task.project.slackWebhook ?? undefined;
  const projectName = task.project.name;
  const shotCode = task.shot?.shotCode;

  // Mark all existing versions for this task as not latest
  await db.version.updateMany({ where: { taskId: parsed.taskId }, data: { isLatest: false } });

  // Move task to INTERNAL_REVIEW on upload
  await db.task.update({
    where: { id: parsed.taskId },
    data: { status: "INTERNAL_REVIEW" },
  });

  // Recalculate shot status
  if (task.shot) {
    await recalcShotStatus(task.shot.id).catch(() => {});
  }

  // Get the next version number for this task
  const lastVersion = await db.version.findFirst({
    where: { taskId: parsed.taskId },
    orderBy: { versionNumber: "desc" },
  });
  const versionNumber = (lastVersion?.versionNumber ?? 0) + 1;

  // Create the new version
  const version = await db.version.create({
    data: {
      versionNumber,
      taskId: parsed.taskId,
      artistId: session.user.id,
      fileUrl: parsed.fileUrl,
      fileName: parsed.fileName,
      fileSize: parsed.fileSize ? BigInt(parsed.fileSize) : undefined,
      mimeType: parsed.mimeType,
      thumbnailUrl: parsed.thumbnailUrl || undefined,
      fps: parsed.fps,
      duration: parsed.duration,
      frameCount: parsed.frameCount,
      width: parsed.width,
      height: parsed.height,
      notes: parsed.notes,
      isLatest: true,
    },
  });

  // Send notifications
  const user = await db.user.findUnique({ where: { id: session.user.id } });
  const versionLabelStr = `v${String(versionNumber).padStart(3, "0")}`;

  if (shotCode) {
    await notifyNewVersionUploaded({
      shotCode,
      versionNumber,
      projectId,
      versionId: version.id,
      artistName: user?.name ?? session.user.email ?? "Artist",
    });
  }

  // Slack notification
  if (slackWebhook && shotCode) {
    const appUrl = process.env.NEXT_PUBLIC_APP_URL ?? "http://localhost:3000";
    await slackNotifyVersionUploaded(slackWebhook, {
      shotCode,
      versionLabel: versionLabelStr,
      artistName: user?.name ?? "Artist",
      projectName,
      reviewUrl: `${appUrl}/review/${version.id}`,
    });
  }

  revalidatePath(`/projects/${projectId}`);
  if (task.shot) revalidatePath(`/projects/${projectId}/shots/${task.shot.id}`);
  revalidatePath(`/tasks/${parsed.taskId}`);

  return { success: true, version, versionNumber };
}

/**
 * Share a version with the client — marks it as client-visible,
 * records who shared it, and moves the associated task to CLIENT_REVIEW.
 */
export async function shareVersionWithClient(versionId: string) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");
  if (!["ADMIN", "PRODUCER", "SUPERVISOR"].includes(session.user.role)) {
    throw new Error("Insufficient permissions");
  }

  const version = await db.version.findUnique({
    where: { id: versionId },
    select: { id: true, taskId: true, isClientVisible: true },
  });
  if (!version) throw new Error("Version not found");

  await db.version.update({
    where: { id: versionId },
    data: {
      isClientVisible: true,
      sharedAt: new Date(),
      sharedById: session.user.id,
    },
  });

  // Move task to CLIENT_REVIEW if it is in INTERNAL_REVIEW; recalc shot status
  if (version.taskId) {
    const task = await db.task.findUnique({
      where: { id: version.taskId },
      select: { status: true, projectId: true, shotId: true },
    });
    if (task && task.status === "INTERNAL_REVIEW") {
      await db.task.update({
        where: { id: version.taskId },
        data: { status: "CLIENT_REVIEW" },
      });
      if (task.shotId) {
        await recalcShotStatus(task.shotId).catch(() => {});
      }
      revalidatePath(`/tasks/${version.taskId}`);
      revalidatePath(`/projects/${task.projectId}`);
    }
  }

  revalidatePath(`/review/${versionId}`);
  return { success: true };
}

export async function getVersionById(versionId: string) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");

  return db.version.findUnique({
    where: { id: versionId },
    include: {
      task: {
        include: {
          project: { include: { client: true } },
          shot: true,
          asset: true,
          versions: {
            orderBy: { versionNumber: "desc" },
            select: { id: true, versionNumber: true, approvalStatus: true, createdAt: true },
          },
        },
      },
      artist: { select: { id: true, name: true, email: true, image: true } },
      approvals: {
        include: { user: { select: { id: true, name: true, role: true } } },
        orderBy: { createdAt: "desc" },
      },
    },
  });
}

export async function getVersionComments(versionId: string) {
  return db.comment.findMany({
    where: { versionId },
    include: {
      author: { select: { id: true, name: true, email: true, image: true, role: true } },
      replies: {
        include: {
          author: { select: { id: true, name: true, email: true, image: true, role: true } },
        },
        orderBy: { createdAt: "asc" },
      },
      annotations: {
        select: { id: true, frameNumber: true, drawingData: true, color: true, isVisible: true, authorId: true },
      },
    },
    orderBy: { frameNumber: "asc" },
  });
}