"use server";

import { auth } from "@/auth";
import { db } from "@/lib/db";
import { revalidatePath } from "next/cache";
import { z } from "zod";
import { ApprovalStatus } from "@prisma/client";
import { recalcShotStatus } from "@/lib/shot-status";
import { notifyApprovalChange } from "@/lib/notifications";
import { slackNotifyApproval } from "@/lib/slack";
import { versionLabel } from "@/lib/utils";

const approvalSchema = z.object({
  versionId: z.string().cuid(),
  status: z.nativeEnum(ApprovalStatus),
  notes: z.string().optional(),
});

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

  const parsed = approvalSchema.parse(data);

  // Only supervisors, producers, admins, and clients can approve
  const allowedRoles = ["ADMIN", "PRODUCER", "SUPERVISOR", "CLIENT"];
  if (!allowedRoles.includes(session.user.role)) {
    throw new Error("Insufficient permissions to review versions");
  }

  // Create the approval record
  const approval = await db.approval.create({
    data: {
      versionId: parsed.versionId,
      userId: session.user.id,
      status: parsed.status,
      notes: parsed.notes,
    },
  });

  // Update version approval status
  await db.version.update({
    where: { id: parsed.versionId },
    data: { approvalStatus: parsed.status },
  });

  // Load version + task + shot + project for downstream effects
  const version = await db.version.findUnique({
    where: { id: parsed.versionId },
    include: {
      task: {
        include: {
          shot: true,
          project: true,
        },
      },
    },
  });

  if (!version) throw new Error("Version not found");

  // Update task status based on approval result
  if (version.task && parsed.status !== "PENDING_REVIEW") {
    if (parsed.status === "APPROVED") {
      await db.task.update({
        where: { id: version.task.id },
        data: { status: "DONE" },
      });
    } else if (parsed.status === "REJECTED" || parsed.status === "NEEDS_CHANGES") {
      await db.task.update({
        where: { id: version.task.id },
        data: { status: "CHANGES" },
      });
    }

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

  // Notifications
  const reviewer = await db.user.findUnique({ where: { id: session.user.id } });
  const reviewerName = reviewer?.name ?? "Reviewer";

  if (version.task && parsed.status !== "PENDING_REVIEW") {
    const contextCode = version.task.shot?.shotCode ?? null;
    await notifyApprovalChange({
      artistId: version.task.assignedArtistId ?? version.artistId,
      shotCode: contextCode ?? version.task.title,
      versionId: parsed.versionId,
      status: parsed.status as "APPROVED" | "REJECTED" | "NEEDS_CHANGES",
      reviewerName,
    });

    // Slack
    if (version.task.project.slackWebhook) {
      const appUrl = process.env.NEXT_PUBLIC_APP_URL ?? "http://localhost:3000";
      await slackNotifyApproval(version.task.project.slackWebhook, {
        shotCode: contextCode ?? version.task.title,
        versionLabel: versionLabel(version.versionNumber),
        status: parsed.status as "APPROVED" | "REJECTED" | "NEEDS_CHANGES",
        reviewerName,
        projectName: version.task.project.name,
        reviewUrl: `${appUrl}/review/${parsed.versionId}`,
      });
    }
  }

  revalidatePath(`/review/${parsed.versionId}`);
  if (version.task) {
    revalidatePath(`/tasks/${version.task.id}`);
    revalidatePath(`/projects/${version.task.projectId}`);
  }

  return { success: true, approval };
}

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

  return db.approval.findMany({
    where: { versionId },
    include: {
      user: { select: { id: true, name: true, email: true, image: true, role: true } },
    },
    orderBy: { createdAt: "desc" },
  });
}