vfxreview/actions/shots.ts

"use server";

import { auth } from "@/auth";
import { db } from "@/lib/db";
import { revalidatePath } from "next/cache";
import { z } from "zod";
import { ShotStatus, ShotPriority, ShotApprovalStatus } from "@prisma/client";
import { recalcShotStatus } from "@/lib/shot-status";

const createShotSchema = z.object({
  scene: z.string().min(1).max(50).regex(/^[A-Z0-9_]+$/i, "Alphanumeric and underscore only"),
  episode: z.string().max(50).optional(),
  description: z.string().optional(),
  projectId: z.string().cuid(),
  artistId: z.string().cuid().optional().or(z.literal("")),
  priority: z.nativeEnum(ShotPriority).default("NORMAL"),
  fps: z.number().default(24),
  frameStart: z.number().int().optional(),
  frameEnd: z.number().int().optional(),
  dueDate: z.string().optional(),
  thumbnailUrl: z.string().optional(),
  shotGroupName: z.string().max(100).optional(),
  isKeyShot: z.boolean().default(false),
});

export async function createShot(data: z.infer<typeof createShotSchema>) {
  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 parsed = createShotSchema.parse(data);
  const scene = parsed.scene.toUpperCase();
  const episode = parsed.episode?.toUpperCase() ?? null;

  // Fetch project for showId and projectType
  const project = await db.project.findUnique({
    where: { id: parsed.projectId },
    select: { showId: true, projectType: true },
  });
  if (!project) throw new Error("Project not found");
  if (!project.showId) {
    throw new Error("Project has no Show ID set. Please edit the project to add one.");
  }

  // For episodic projects, episode is required
  if (project.projectType === "EPISODIC" && !episode) {
    throw new Error("Episode is required for episodic projects.");
  }

  // Determine shot number scope: projectId + scene (+ episode for episodic)
  const scopeWhere = {
    projectId: parsed.projectId,
    scene,
    ...(project.projectType === "EPISODIC" ? { episode } : {}),
  };

  const maxShot = await db.shot.findFirst({
    where: scopeWhere,
    orderBy: { shotNumber: "desc" },
    select: { shotNumber: true },
  });

  const shotNumber = (maxShot?.shotNumber ?? 0) + 10;
  const paddedNumber = shotNumber.toString().padStart(4, "0");

  // Build shot code per naming convention
  const shotCode =
    project.projectType === "EPISODIC" && episode
      ? `${project.showId}_${episode}_${scene}_${paddedNumber}`
      : `${project.showId}_${scene}_${paddedNumber}`;

  const shot = await db.shot.create({
    data: {
      shotCode,
      scene,
      episode,
      shotNumber,
      description: parsed.description,
      projectId: parsed.projectId,
      artistId: parsed.artistId || undefined,
      priority: parsed.priority,
      fps: parsed.fps,
      frameStart: parsed.frameStart,
      frameEnd: parsed.frameEnd,
      dueDate: parsed.dueDate ? new Date(parsed.dueDate) : undefined,
      thumbnailUrl: parsed.thumbnailUrl,
      isKeyShot: parsed.isKeyShot ?? false,
      shotGroupId: parsed.shotGroupName?.trim()
        ? (await db.shotGroup.upsert({
            where: { projectId_name: { projectId: parsed.projectId, name: parsed.shotGroupName.trim() } },
            create: { projectId: parsed.projectId, name: parsed.shotGroupName.trim() },
            update: {},
          })).id
        : undefined,
    },
  });

  revalidatePath(`/projects/${parsed.projectId}`);
  return { success: true, shot };
}

// ── Duplicate Shot ────────────────────────────────────────────────────────────

export async function duplicateShot(sourceShotId: 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");
  }

  // Load source shot with tasks
  const source = await db.shot.findUnique({
    where: { id: sourceShotId },
    include: {
      tasks: {
        select: {
          title: true,
          description: true,
          type: true,
          priority: true,
          estimatedHours: true,
          sortOrder: true,
          dueDate: true,
          assignedArtistId: true,
        },
      },
    },
  });
  if (!source) throw new Error("Shot not found");

  const project = await db.project.findUnique({
    where: { id: source.projectId },
    select: { showId: true, projectType: true },
  });
  if (!project?.showId) throw new Error("Project has no Show ID");

  // Determine next shot number in same scene/episode scope
  const scopeWhere = {
    projectId: source.projectId,
    scene: source.scene,
    ...(project.projectType === "EPISODIC" ? { episode: source.episode } : {}),
  };

  const maxShot = await db.shot.findFirst({
    where: scopeWhere,
    orderBy: { shotNumber: "desc" },
    select: { shotNumber: true },
  });

  const shotNumber = (maxShot?.shotNumber ?? 0) + 10;
  const paddedNumber = shotNumber.toString().padStart(4, "0");

  const shotCode =
    project.projectType === "EPISODIC" && source.episode
      ? `${project.showId}_${source.episode}_${source.scene}_${paddedNumber}`
      : `${project.showId}_${source.scene}_${paddedNumber}`;

  const newShot = await db.shot.create({
    data: {
      shotCode,
      scene: source.scene,
      episode: source.episode,
      shotNumber,
      sequence: source.sequence,
      description: source.description,
      projectId: source.projectId,
      artistId: source.artistId,
      priority: source.priority,
      fps: source.fps,
      frameStart: source.frameStart,
      frameEnd: source.frameEnd,
      dueDate: source.dueDate,
      thumbnailUrl: source.thumbnailUrl,
      shotGroupId: source.shotGroupId ?? undefined,
      // Duplicate tasks — reset status and schedule fields
      tasks: {
        create: source.tasks.map((t) => ({
          title: t.title,
          description: t.description,
          type: t.type,
          priority: t.priority,
          estimatedHours: t.estimatedHours,
          sortOrder: t.sortOrder,
          dueDate: t.dueDate,
          assignedArtistId: t.assignedArtistId,
          projectId: source.projectId,
          status: "TODO" as const,
        })),
      },
    },
  });

  revalidatePath(`/projects/${source.projectId}`);
  return { success: true, shot: newShot };
}

// ── Update Shot ───────────────────────────────────────────────────────────────

const updateShotSchema = z.object({
  shotId: z.string().cuid(),
  shotCode: z.string().min(1).max(120).regex(/^[A-Z0-9_]+$/i, "Alphanumeric and underscores only").optional(),
  description: z.string().optional(),
  status: z.nativeEnum(ShotStatus).optional(),
  priority: z.nativeEnum(ShotPriority).optional(),
  shotApprovalStatus: z.nativeEnum(ShotApprovalStatus).optional(),
  sharedWithClient: z.boolean().optional(),
  fps: z.number().optional(),
  frameStart: z.number().int().optional().nullable(),
  frameEnd: z.number().int().optional().nullable(),
  dueDate: z.string().optional().nullable(),
  artistId: z.string().cuid().optional().nullable().or(z.literal("")),
  thumbnailUrl: z.string().optional().nullable(),
  originalFootageUrl: z.string().optional().nullable(),
  originalFootageKey: z.string().optional().nullable(),
});

export async function updateShot(data: z.infer<typeof updateShotSchema>) {
  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 parsed = updateShotSchema.parse(data);
  const { shotId, dueDate, artistId, shotCode, ...rest } = parsed;

  // Check uniqueness if shotCode is being changed
  if (shotCode) {
    const existing = await db.shot.findFirst({
      where: { projectId: (await db.shot.findUnique({ where: { id: shotId }, select: { projectId: true } }))!.projectId, shotCode, id: { not: shotId } },
      select: { id: true },
    });
    if (existing) throw new Error(`Shot code "${shotCode}" is already used in this project.`);
  }

  const shot = await db.shot.update({
    where: { id: shotId },
    data: {
      ...rest,
      ...(shotCode ? { shotCode: shotCode.toUpperCase() } : {}),
      dueDate: dueDate ? new Date(dueDate) : dueDate === null ? null : undefined,
      artistId: artistId === "" ? null : artistId,
    },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  return { success: true, shot };
}

// ── CSV Import ────────────────────────────────────────────────────────────────

export async function importShotsFromCsv(
  projectId: string,
  rows: Array<{
    scene: string;
    episode?: string;
    description?: string;
    priority?: string;
    fps?: number;
    frameStart?: number;
    frameEnd?: number;
  }>
) {
  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 project = await db.project.findUnique({
    where: { id: projectId },
    select: { showId: true, projectType: true },
  });
  if (!project) throw new Error("Project not found");
  if (!project.showId) throw new Error("Project has no Show ID. Add one in Project Settings first.");

  const VALID_PRIORITIES = ["LOW", "NORMAL", "HIGH", "CRITICAL"];
  const created: string[] = [];
  const errors: string[] = [];

  for (const row of rows) {
    try {
      const scene = row.scene.trim().toUpperCase();
      if (!scene) { errors.push("Empty scene name — skipped"); continue; }

      const episode = row.episode?.trim().toUpperCase() || null;

      if (project.projectType === "EPISODIC" && !episode) {
        errors.push(`${scene}: episode required for episodic project — skipped`);
        continue;
      }

      const rawPriority = row.priority?.trim().toUpperCase();
      const priority = VALID_PRIORITIES.includes(rawPriority ?? "")
        ? (rawPriority as ShotPriority)
        : ShotPriority.NORMAL;

      const scopeWhere = {
        projectId,
        scene,
        ...(project.projectType === "EPISODIC" ? { episode } : {}),
      };

      const maxShot = await db.shot.findFirst({
        where: scopeWhere,
        orderBy: { shotNumber: "desc" },
        select: { shotNumber: true },
      });

      const shotNumber = (maxShot?.shotNumber ?? 0) + 10;
      const paddedNumber = shotNumber.toString().padStart(4, "0");
      const shotCode =
        project.projectType === "EPISODIC" && episode
          ? `${project.showId}_${episode}_${scene}_${paddedNumber}`
          : `${project.showId}_${scene}_${paddedNumber}`;

      await db.shot.create({
        data: {
          shotCode,
          scene,
          episode,
          shotNumber,
          description: row.description?.trim() || undefined,
          projectId,
          priority,
          fps: row.fps ?? 24,
          frameStart: row.frameStart ?? undefined,
          frameEnd: row.frameEnd ?? undefined,
        },
      });
      created.push(shotCode);
    } catch (e: unknown) {
      errors.push(`${row.scene}: ${e instanceof Error ? e.message : "Unknown error"}`);
    }
  }

  revalidatePath(`/projects/${projectId}`);
  return { success: true, created, errors };
}

export async function updateShotStatus(
  shotId: string,
  status: ShotStatus
) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");

  const shot = await db.shot.update({
    where: { id: shotId },
    data: { status },
    include: { project: true },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  return { success: true };
}

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

  return db.shot.findUnique({
    where: { id: shotId },
    include: {
      project: { include: { client: true } },
      artist: { select: { id: true, name: true, email: true, image: true } },
      versions: {
        include: {
          artist: { select: { id: true, name: true, image: true } },
          _count: { select: { comments: true } },
        },
        orderBy: { versionNumber: "desc" },
      },
    },
  });
}

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

  return db.shot.findMany({
    where: { projectId },
    include: {
      artist: { select: { id: true, name: true, image: true } },
      versions: {
        where: { isLatest: true },
        take: 1,
        include: { _count: { select: { comments: true } } },
      },
      _count: { select: { versions: true } },
    },
    orderBy: [{ sequence: "asc" }, { shotCode: "asc" }],
  });
}

// ─── Footage Plates ────────────────────────────────────────────────────────────

const addFootagePlateSchema = z.object({
  shotId: z.string().min(1),
  fileUrl: z.string().min(1),
  fileKey: z.string().default(""),
  fileName: z.string().default(""),
  fileSize: z.number().int().positive().optional(),
  label: z.string().max(100).default(""),
});

export async function addFootagePlate(raw: unknown) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");

  const data = addFootagePlateSchema.parse(raw);

  // Determine next sortOrder
  const last = await db.footagePlate.findFirst({
    where: { shotId: data.shotId },
    orderBy: { sortOrder: "desc" },
    select: { sortOrder: true },
  });

  const plate = await db.footagePlate.create({
    data: {
      shotId: data.shotId,
      fileUrl: data.fileUrl,
      fileKey: data.fileKey,
      fileName: data.fileName,
      fileSize: data.fileSize != null ? BigInt(data.fileSize) : null,
      label: data.label,
      sortOrder: (last?.sortOrder ?? -1) + 1,
    },
  });

  const shot = await db.shot.findUnique({ where: { id: data.shotId }, select: { projectId: true } });
  if (shot) {
    revalidatePath(`/projects/${shot.projectId}`);
    revalidatePath(`/projects/${shot.projectId}/shots/${data.shotId}`);
  }

  return { success: true, plate: { ...plate, fileSize: plate.fileSize?.toString() ?? null } };
}

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

  const role = session.user.role as string;
  if (!["ADMIN", "PRODUCER", "SUPERVISOR"].includes(role)) throw new Error("Insufficient permissions");

  const plate = await db.footagePlate.findUnique({
    where: { id: plateId },
    include: { shot: { select: { projectId: true } } },
  });
  if (!plate) throw new Error("Plate not found");

  await db.footagePlate.delete({ where: { id: plateId } });

  revalidatePath(`/projects/${plate.shot.projectId}`);
  revalidatePath(`/projects/${plate.shot.projectId}/shots/${plate.shotId}`);

  return { success: true };
}

// ── Update Shot Notes ─────────────────────────────────────────────────────────

export async function updateShotNotes(shotId: string, notes: 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 shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true },
  });
  if (!shot) throw new Error("Shot not found");

  await db.shot.update({
    where: { id: shotId },
    data: { notes: notes.trim() || null },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

// ── Update Shot Slate Fields ──────────────────────────────────────────────────

export async function updateShotSlate(
  shotId: string,
  data: {
    slateType?: string | null;
    slateDescription?: string | null;
    slateVfxScope?: string | null;
    slateSubmissionNote?: string | null;
    clientCode?: string | null;
  }
) {
  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 shot = await db.shot.findUnique({ where: { id: shotId }, select: { projectId: true } });
  if (!shot) throw new Error("Shot not found");

  await db.shot.update({
    where: { id: shotId },
    data: {
      slateType:           data.slateType           !== undefined ? (data.slateType?.trim()           || null) : undefined,
      slateDescription:    data.slateDescription    !== undefined ? (data.slateDescription?.trim()    || null) : undefined,
      slateVfxScope:       data.slateVfxScope       !== undefined ? (data.slateVfxScope?.trim()       || null) : undefined,
      slateSubmissionNote: data.slateSubmissionNote !== undefined ? (data.slateSubmissionNote?.trim() || null) : undefined,
      clientCode:          data.clientCode          !== undefined ? (data.clientCode?.trim()          || null) : undefined,
    },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  return { success: true };
}

// ── Toggle Key Shot ───────────────────────────────────────────────────────────

export async function toggleKeyShot(shotId: string, isKeyShot: boolean) {
  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 shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true },
  });
  if (!shot) throw new Error("Shot not found");

  await db.shot.update({
    where: { id: shotId },
    data: { isKeyShot },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

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

  const role = session.user.role as string;
  if (!["ADMIN", "PRODUCER", "SUPERVISOR"].includes(role)) throw new Error("Insufficient permissions");

  const shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true },
  });
  if (!shot) throw new Error("Shot not found");

  await db.shot.delete({ where: { id: shotId } });

  revalidatePath(`/projects/${shot.projectId}`);

  return { success: true, projectId: shot.projectId };
}

// ── Bulk Update Due Dates ─────────────────────────────────────────────────────

export async function bulkUpdateDueDates(
  shotIds: string[],
  dueDate: string,
  includeTasks: boolean,
) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");
  if (!["ADMIN", "PRODUCER", "SUPERVISOR"].includes(session.user.role)) {
    throw new Error("Insufficient permissions");
  }

  if (!shotIds.length) return { success: true, updated: 0 };

  const date = new Date(dueDate);

  const shots = await db.shot.findMany({
    where: { id: { in: shotIds } },
    select: { id: true, projectId: true },
  });
  if (shots.length !== shotIds.length) throw new Error("Some shots not found");

  const projectIds = [...new Set(shots.map((s) => s.projectId))];

  await db.shot.updateMany({
    where: { id: { in: shotIds } },
    data: { dueDate: date },
  });

  if (includeTasks) {
    await db.task.updateMany({
      where: { shotId: { in: shotIds } },
      data: { dueDate: date },
    });
  }

  for (const pid of projectIds) {
    revalidatePath(`/projects/${pid}`);
  }
  revalidatePath(`/shot-status`);

  return { success: true, updated: shots.length };
}

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

  const role = session.user.role as string;
  if (!["ADMIN", "PRODUCER", "SUPERVISOR"].includes(role)) throw new Error("Insufficient permissions");

  const trimmed = label.trim().slice(0, 100);

  const plate = await db.footagePlate.update({
    where: { id: plateId },
    data: { label: trimmed },
    include: { shot: { select: { projectId: true } } },
  });

  revalidatePath(`/projects/${plate.shot.projectId}`);
  revalidatePath(`/projects/${plate.shot.projectId}/shots/${plate.shotId}`);

  return { success: true };
}

// ── Internal Approval ─────────────────────────────────────────────────────────

/**
 * Supervisor/Producer/Admin: mark a shot as internally approved.
 * Sets shotApprovalStatus = INTERNALLY_APPROVED, sharedWithClient = false.
 * Shot status becomes READY_FOR_CLIENT.
 */
export async function internallyApproveShot(shotId: 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 shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true },
  });
  if (!shot) throw new Error("Shot not found");

  await db.shot.update({
    where: { id: shotId },
    data: {
      shotApprovalStatus: "INTERNALLY_APPROVED",
      sharedWithClient: false,
      status: "READY_FOR_CLIENT",
    },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

// ── Share / Unshare With Client ───────────────────────────────────────────────

/**
 * Producer/Supervisor/Admin: share an internally-approved shot with the client.
 * Sets sharedWithClient = true → status becomes CLIENT_REVIEW.
 * Also marks the latest version of every task on this shot as isClientVisible = true
 * so the client portal can display them.
 */
export async function shareWithClient(shotId: 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 shot = await db.shot.findUnique({
    where: { id: shotId },
    select: {
      projectId: true,
      shotApprovalStatus: true,
      tasks: { select: { id: true } },
    },
  });
  if (!shot) throw new Error("Shot not found");
  if (!(["INTERNALLY_APPROVED", "CLIENT_APPROVED"] as string[]).includes(shot.shotApprovalStatus)) {
    throw new Error("Shot must be internally approved before sharing with client");
  }

  const now = new Date();

  await db.$transaction(async (tx) => {
    // Mark shot as shared
    await tx.shot.update({
      where: { id: shotId },
      data: { sharedWithClient: true, status: "CLIENT_REVIEW" },
    });

    // For each task, make the latest version client-visible
    for (const task of shot.tasks) {
      const latest = await tx.version.findFirst({
        where: { taskId: task.id, isLatest: true },
        select: { id: true, isClientVisible: true },
      });
      if (latest && !latest.isClientVisible) {
        await tx.version.update({
          where: { id: latest.id },
          data: {
            isClientVisible: true,
            sharedAt: now,
            sharedById: session.user.id,
          },
        });
      }
    }
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

/**
 * Producer/Supervisor/Admin: remove a shot from client review.
 * Sets sharedWithClient = false → status becomes READY_FOR_CLIENT.
 * Also hides all task versions that were made visible by shareWithClient.
 */
export async function unshareFromClient(shotId: 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 shot = await db.shot.findUnique({
    where: { id: shotId },
    select: {
      projectId: true,
      tasks: { select: { id: true } },
    },
  });
  if (!shot) throw new Error("Shot not found");

  await db.$transaction(async (tx) => {
    await tx.shot.update({
      where: { id: shotId },
      data: { sharedWithClient: false, status: "READY_FOR_CLIENT" },
    });

    // Hide all client-visible versions on this shot's tasks
    const taskIds = shot.tasks.map((t) => t.id);
    if (taskIds.length > 0) {
      await tx.version.updateMany({
        where: { taskId: { in: taskIds }, isClientVisible: true },
        data: { isClientVisible: false },
      });
    }
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

// ── Shot-Level Client Approval ────────────────────────────────────────────────

/**
 * Internal: handle client approving the shot.
 * Sets shotApprovalStatus = CLIENT_APPROVED → status becomes COMPLETE.
 */
export async function clientApproveShot(shotId: string) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");
  if (!["ADMIN", "PRODUCER", "SUPERVISOR", "CLIENT"].includes(session.user.role)) {
    throw new Error("Insufficient permissions");
  }

  const shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true, sharedWithClient: true },
  });
  if (!shot) throw new Error("Shot not found");
  if (!shot.sharedWithClient) throw new Error("Shot is not shared with client");

  await db.shot.update({
    where: { id: shotId },
    data: { shotApprovalStatus: "CLIENT_APPROVED", status: "COMPLETE" },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

/**
 * Admin/Producer/Supervisor: undo a client approval on a shot.
 * Resets shotApprovalStatus from CLIENT_APPROVED → INTERNALLY_APPROVED.
 * Shot status reverts to CLIENT_REVIEW (if still shared) or READY_FOR_CLIENT.
 */
export async function unapproveShot(shotId: 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 shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true, shotApprovalStatus: true, sharedWithClient: true },
  });
  if (!shot) throw new Error("Shot not found");
  if (shot.shotApprovalStatus !== "CLIENT_APPROVED") {
    throw new Error("Shot is not client-approved");
  }

  const newStatus = shot.sharedWithClient ? "CLIENT_REVIEW" : "READY_FOR_CLIENT";

  await db.shot.update({
    where: { id: shotId },
    data: {
      shotApprovalStatus: "INTERNALLY_APPROVED",
      status: newStatus,
    },
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

// ── EDL / Pull CSV Import ─────────────────────────────────────────────────────

import type { EdlImportRow } from "@/lib/edl-utils";
export type { EdlImportRow };

export async function importShotsFromEdl(
  projectId: string,
  rows: EdlImportRow[]
): Promise<{ created: string[]; updated: string[]; skipped: string[]; errors: 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 created: string[] = [];
  const updated: string[] = [];
  const skipped: string[] = [];
  const errors: string[] = [];

  for (const row of rows) {
    if (row.action === "skip") { skipped.push(row.shotCode); continue; }

    try {
      if (row.action === "update" && row.existingShotId) {
        await db.shot.update({
          where: { id: row.existingShotId },
          data: {
            sourceClip:    row.sourceClip   || null,
            timecodeStart: row.timecodeStart || null,
            timecodeEnd:   row.timecodeEnd   || null,
            clipDuration:  row.clipDuration  || null,
            exrOutput:     row.exrOutput     || null,
          },
        });
        updated.push(row.shotCode);
      } else {
        const existing = await db.shot.findFirst({
          where: { projectId, shotCode: row.shotCode },
          select: { id: true },
        });

        if (existing) {
          await db.shot.update({
            where: { id: existing.id },
            data: {
              sourceClip:    row.sourceClip   || null,
              timecodeStart: row.timecodeStart || null,
              timecodeEnd:   row.timecodeEnd   || null,
              clipDuration:  row.clipDuration  || null,
              exrOutput:     row.exrOutput     || null,
            },
          });
          updated.push(row.shotCode);
        } else {
          const parts    = row.shotCode.split("_");
          const scene    = parts[2] ?? parts[1] ?? "000";
          const episode  = parts[1] ?? null;

          const maxNum = await db.shot.findFirst({
            where: { projectId, scene, episode },
            orderBy: { shotNumber: "desc" },
            select: { shotNumber: true },
          });
          const shotNumber = (maxNum?.shotNumber ?? 0) + 10;

          await db.shot.create({
            data: {
              projectId,
              shotCode:      row.shotCode,
              scene,
              episode,
              shotNumber,
              sourceClip:    row.sourceClip   || null,
              timecodeStart: row.timecodeStart || null,
              timecodeEnd:   row.timecodeEnd   || null,
              clipDuration:  row.clipDuration  || null,
              exrOutput:     row.exrOutput     || null,
            },
          });
          created.push(row.shotCode);
        }
      }
    } catch (e) {
      errors.push(`${row.shotCode}: ${e instanceof Error ? e.message : "Unknown error"}`);
    }
  }

  revalidatePath(`/projects/${projectId}`);
  return { created, updated, skipped, errors };
}

// ── Picture Tracker / Sequence Timecode Update ────────────────────────────────

export interface SeqTimecodeRow {
  shotCode: string;
  seqTimecodeStart: string;
  seqTimecodeEnd: string;
}

export async function updateShotsSeqTimecodes(
  projectId: string,
  rows: SeqTimecodeRow[]
): Promise<{ updated: string[]; skipped: string[]; errors: 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 updated: string[] = [];
  const skipped: string[] = [];
  const errors: string[] = [];

  for (const row of rows) {
    try {
      const existing = await db.shot.findFirst({
        where: { projectId, shotCode: row.shotCode },
        select: { id: true },
      });

      if (!existing) {
        skipped.push(row.shotCode);
        continue;
      }

      await db.shot.update({
        where: { id: existing.id },
        data: {
          seqTimecodeStart: row.seqTimecodeStart || null,
          seqTimecodeEnd:   row.seqTimecodeEnd   || null,
        },
      });
      updated.push(row.shotCode);
    } catch (e) {
      errors.push(`${row.shotCode}: ${e instanceof Error ? e.message : "Unknown error"}`);
    }
  }

  revalidatePath(`/projects/${projectId}`);
  return { updated, skipped, errors };
}

// ── Simple CSV shot import ────────────────────────────────────────────────────

export interface SimpleCsvRow {
  shotCode: string;
  seqTimecodeStart: string;
  seqTimecodeEnd: string;
  description: string;
  group: string;
  action: "create" | "update" | "skip";
}

export async function importShotsFromSimpleCsv(
  projectId: string,
  rows: SimpleCsvRow[]
): Promise<{ created: string[]; updated: string[]; skipped: string[]; errors: 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 created: string[] = [];
  const updated: string[] = [];
  const skipped: string[] = [];
  const errors: string[] = [];

  for (const row of rows) {
    if (row.action === "skip") { skipped.push(row.shotCode); continue; }
    try {
      const existing = await db.shot.findFirst({
        where: { projectId, shotCode: row.shotCode },
        select: { id: true },
      });

      if (existing) {
        const shotGroupId = row.group?.trim()
          ? (await db.shotGroup.upsert({
              where: { projectId_name: { projectId, name: row.group.trim() } },
              create: { projectId, name: row.group.trim() },
              update: {},
            })).id
          : undefined;
        await db.shot.update({
          where: { id: existing.id },
          data: {
            description:      row.description      || null,
            seqTimecodeStart: row.seqTimecodeStart || null,
            seqTimecodeEnd:   row.seqTimecodeEnd   || null,
            ...(shotGroupId ? { shotGroupId } : {}),
          },
        });
        updated.push(row.shotCode);
      } else if (row.action === "create") {
        const parts      = row.shotCode.split("_");
        const scene      = parts.length >= 3 ? parts[2] : (parts[1] ?? "000");
        const episode    = parts.length >= 4 ? parts[1] : null;
        const maxNum     = await db.shot.findFirst({
          where: { projectId, scene, episode },
          orderBy: { shotNumber: "desc" },
          select: { shotNumber: true },
        });
        const shotNumber = (maxNum?.shotNumber ?? 0) + 10;
        const shotGroupId = row.group?.trim()
          ? (await db.shotGroup.upsert({
              where: { projectId_name: { projectId, name: row.group.trim() } },
              create: { projectId, name: row.group.trim() },
              update: {},
            })).id
          : undefined;

        await db.shot.create({
          data: {
            projectId,
            shotCode:         row.shotCode,
            scene,
            episode,
            shotNumber,
            description:      row.description      || null,
            seqTimecodeStart: row.seqTimecodeStart || null,
            seqTimecodeEnd:   row.seqTimecodeEnd   || null,
            shotGroupId,
          },
        });
        created.push(row.shotCode);
      } else {
        // action === "update" but shot not found
        skipped.push(row.shotCode);
      }
    } catch (e) {
      errors.push(`${row.shotCode}: ${e instanceof Error ? e.message : "Unknown error"}`);
    }
  }

  revalidatePath(`/projects/${projectId}`);
  return { created, updated, skipped, errors };
}

// ── Group Assignment ──────────────────────────────────────────────────────────────────

export interface GroupAssignRow {
  shotCode: string;
  groupName: string;
  exists: boolean;
}

export async function assignShotGroups(
  projectId: string,
  rows: GroupAssignRow[]
): Promise<{ assigned: string[]; skipped: string[]; errors: 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 assigned: string[] = [];
  const skipped:  string[] = [];
  const errors:   string[] = [];

  for (const row of rows) {
    if (!row.exists) { skipped.push(row.shotCode); continue; }
    try {
      const shot = await db.shot.findFirst({
        where: { projectId, shotCode: row.shotCode },
        select: { id: true },
      });
      if (!shot) { skipped.push(row.shotCode); continue; }

      const group = await db.shotGroup.upsert({
        where: { projectId_name: { projectId, name: row.groupName.trim() } },
        create: { projectId, name: row.groupName.trim() },
        update: {},
      });

      await db.shot.update({
        where: { id: shot.id },
        data: { shotGroupId: group.id },
      });
      assigned.push(row.shotCode);
    } catch (e) {
      errors.push(`${row.shotCode}: ${e instanceof Error ? e.message : "Unknown error"}`);
    }
  }

  revalidatePath(`/projects/${projectId}`);
  return { assigned, skipped, errors };
}

/**
 * Internal: handle client requesting changes on a shot.
 * Resets shotApprovalStatus = PENDING, sharedWithClient = false.
 * Recalculates shot status (will become REVISIONS if tasks set to CHANGES).
 */
export async function clientRequestShotChanges(shotId: string, taskId?: string) {
  const session = await auth();
  if (!session?.user) throw new Error("Unauthorized");
  if (!["ADMIN", "PRODUCER", "SUPERVISOR", "CLIENT"].includes(session.user.role)) {
    throw new Error("Insufficient permissions");
  }

  const shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true },
  });
  if (!shot) throw new Error("Shot not found");

  await db.$transaction(async (tx) => {
    // Reset shot approval
    await tx.shot.update({
      where: { id: shotId },
      data: { shotApprovalStatus: "PENDING", sharedWithClient: false },
    });

    // If a specific task is called out, mark it CHANGES; otherwise mark all non-DONE tasks
    if (taskId) {
      await tx.task.update({
        where: { id: taskId },
        data: { status: "CHANGES" },
      });
    } else {
      await tx.task.updateMany({
        where: { shotId, status: { not: "DONE" } },
        data: { status: "CHANGES" },
      });
    }

    await recalcShotStatus(shotId, tx);
  });

  revalidatePath(`/projects/${shot.projectId}`);
  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  revalidatePath(`/shot-status`);
  return { success: true };
}

// ── Shot Version ──────────────────────────────────────────────────────────────

const VERSION_RE = /^v\d{3}$/;

/**
 * Set or manually override the shot's version string (format: v###).
 */
export async function updateShotVersion(shotId: string, version: 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");
  }
  if (!VERSION_RE.test(version)) {
    throw new Error("Version must be in format v### (e.g. v001, v012)");
  }

  const shot = await db.shot.findUnique({
    where: { id: shotId },
    select: { projectId: true },
  });
  if (!shot) throw new Error("Shot not found");

  await db.shot.update({
    where: { id: shotId },
    data: { shotVersion: version },
  });

  revalidatePath(`/projects/${shot.projectId}/shots/${shotId}`);
  return { success: true, shotVersion: version };
}