import { NextRequest, NextResponse } from "next/server";
import { prisma } from "@/lib/db";
import { deleteObject } from "@/lib/storage";
import { fireIntegrationEvent } from "@/lib/integrations";
import { logActivity, diffCardFields } from "@/lib/activity-log";
import { getOrCreateUser, RoleError } from "@/lib/auth";

export async function GET(
  _request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { id } = await params;
    const card = await prisma.responseCard.findUnique({
      where: { id },
    });

    if (!card) {
      return NextResponse.json({ error: "Card not found" }, { status: 404 });
    }

    const frontImageUrl = card.frontImagePath
      ? `/api/images/${card.frontImagePath}`
      : null;
    const backImageUrl = card.backImagePath
      ? `/api/images/${card.backImagePath}`
      : null;

    return NextResponse.json({
      ...card,
      frontImageUrl,
      backImageUrl,
    });
  } catch (error) {
    console.error("[cards/[id] GET]", error);
    return NextResponse.json(
      { error: "Failed to fetch card" },
      { status: 500 }
    );
  }
}

export async function PUT(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const user = await getOrCreateUser(request.headers);

    const { id } = await params;
    const card = await prisma.responseCard.findUnique({
      where: { id },
    });

    if (!card) {
      return NextResponse.json({ error: "Card not found" }, { status: 404 });
    }

    if (user) {
      if (user.role === "viewer") {
        return NextResponse.json({ error: "Viewers cannot edit cards" }, { status: 403 });
      }
      if (user.role === "reviewer" && card.assignedToId !== user.id) {
        return NextResponse.json({ error: "You can only edit cards assigned to you" }, { status: 403 });
      }
    }

    const body = await request.json().catch(() => ({}));
    const data: Record<string, unknown> = {};

    const stringFields = [
      "name",
      "gender",
      "dateOfBirth",
      "maritalStatus",
      "maritalStatusOther",
      "visitType",
      "cellPhone",
      "homePhone",
      "email",
      "address",
      "aptNumber",
      "city",
      "state",
      "zip",
      "prayerRequests",
      "messageTopicsOther",
      "attendanceDuration",
      "campusPreferenceOther",
      "howHeardOther",
      "serviceAttended",
      "followUp",
      "notes",
      "serviceTime",
      "planningCenter",
      "ocrStatus",
      "reviewStatus",
      "ocrError",
      "reviewNotes",
    ];
    for (const field of stringFields) {
      if (body[field] != null) data[field] = String(body[field]);
    }

    if (body.prayerForTeam != null) data.prayerForTeam = Boolean(body.prayerForTeam);
    if (body.prayerConfidential != null) data.prayerConfidential = Boolean(body.prayerConfidential);
    if (body.iSaidYesBookSent != null) data.iSaidYesBookSent = Boolean(body.iSaidYesBookSent);
    if (body.ftGuestLetterSent != null) data.ftGuestLetterSent = Boolean(body.ftGuestLetterSent);

    for (const dateField of ["firstTimeGuestDate", "salvationDate", "assignedAt", "reviewedAt"] as const) {
      if (body[dateField] !== undefined) {
        data[dateField] = body[dateField] ? new Date(body[dateField]) : null;
      }
    }
    if (body.ocrConfidence != null) data.ocrConfidence = Number(body.ocrConfidence);
    if (body.messageTopics != null) data.messageTopics = body.messageTopics;
    if (body.nextStep != null) data.nextStep = body.nextStep;
    if (body.campusPreference != null) data.campusPreference = body.campusPreference;
    if (body.howHeard != null) data.howHeard = body.howHeard;
    if (body.rawOcrResponse != null) data.rawOcrResponse = body.rawOcrResponse;

    for (const assignField of ["assignedToId", "assignedById", "reviewedById"] as const) {
      if (body[assignField] !== undefined) {
        data[assignField] = body[assignField] || null;
      }
    }

    if (body.reviewStatus === "in_review" && card.reviewStatus === "assigned") {
      data.reviewStatus = "in_review";
    }

    if (body.reviewStatus === "reviewed" && user) {
      data.reviewedById = user.id;
      data.reviewedAt = new Date();
    }

    const oldCard = card as unknown as Record<string, unknown>;

    const updated = await prisma.responseCard.update({
      where: { id },
      data: data as Parameters<typeof prisma.responseCard.update>[0]["data"],
    });

    const newCard = updated as unknown as Record<string, unknown>;
    const changes = diffCardFields(oldCard, newCard);
    if (changes.length > 0) {
      logActivity(
        id,
        "manual_edit",
        "user",
        `${changes.length} field(s) updated manually`,
        changes,
        user?.id
      ).catch(() => {});
    }

    const oldStatus = card.reviewStatus;
    const newStatus = updated.reviewStatus;
    if (oldStatus !== newStatus) {
      if (newStatus === "reviewed") {
        fireIntegrationEvent("card_reviewed", id, { oldCard }).catch(() => {});
      } else if (newStatus === "exported") {
        fireIntegrationEvent("card_exported", id, { oldCard }).catch(() => {});
      }
    }

    return NextResponse.json(updated);
  } catch (error) {
    if (error instanceof RoleError) {
      return NextResponse.json({ error: error.message }, { status: 403 });
    }
    console.error("[cards/[id] PUT]", error);
    return NextResponse.json(
      { error: "Failed to update card" },
      { status: 500 }
    );
  }
}

export async function DELETE(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const user = await getOrCreateUser(request.headers);
    if (user && user.role !== "admin") {
      return NextResponse.json({ error: "Only admins can delete cards" }, { status: 403 });
    }

    const { id } = await params;
    const card = await prisma.responseCard.findUnique({
      where: { id },
    });

    if (!card) {
      return NextResponse.json({ error: "Card not found" }, { status: 404 });
    }

    fireIntegrationEvent("card_deleted", id).catch(() => {});

    const deletePromises: Promise<void>[] = [];
    if (card.frontImagePath) deletePromises.push(deleteObject(card.frontImagePath));
    if (card.backImagePath) deletePromises.push(deleteObject(card.backImagePath));
    await Promise.allSettled(deletePromises);

    await prisma.responseCard.delete({
      where: { id },
    });

    return NextResponse.json({ success: true });
  } catch (error) {
    console.error("[cards/[id] DELETE]", error);
    return NextResponse.json(
      { error: "Failed to delete card" },
      { status: 500 }
    );
  }
}