import { auth } from "@/lib/auth";
import { createSupabaseServiceRoleClient } from "@/lib/supabase/service-role";
import { updateGalleryPhotoPickStatus } from "@/server/admin/gallery-pick";
import { NextResponse, type NextRequest } from "next/server";
import { z } from "zod";

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

const galleryPhotoSelect =
    "id,unsplash_id,slug,description,alt_description,width,height,color,color_family,likes,urls,user_info,photo_created_at,is_picked,picked_at,picked_by,oss_url,oss_object_key,oss_synced_at,oss_sync_error";

const patchSchema = z.object({
    unsplashId: z.string().min(1),
    isPicked: z.boolean(),
});

async function requireAdminSession() {
    const session = await auth();

    if (!session) {
        return null;
    }

    return session;
}

export async function GET(request: NextRequest) {
    try {
        const session = await requireAdminSession();

        if (!session) {
            return NextResponse.json(
                { ok: false, error: "Unauthorized." },
                { status: 401 },
            );
        }

        const { searchParams } = new URL(request.url);
        const page = parseInt(searchParams.get("page") || "1", 10);
        const perPage = parseInt(searchParams.get("per_page") || "24", 10);
        const picked = searchParams.get("picked");
        const colorFamily = searchParams.get("color_family");

        if (page < 1 || perPage < 1 || perPage > 100) {
            return NextResponse.json(
                { ok: false, error: "Invalid pagination parameters." },
                { status: 400 },
            );
        }

        const supabase = createSupabaseServiceRoleClient();

        let query = supabase
            .from("wg_gallery_photos")
            .select(galleryPhotoSelect, { count: "exact" });

        if (picked === "true") {
            query = query.eq("is_picked", true);
        } else if (picked === "false") {
            query = query.eq("is_picked", false);
        }

        if (colorFamily && colorFamily !== "all") {
            query = query.eq("color_family", colorFamily);
        }

        const { data, error, count } = await query
            .order("picked_at", { ascending: false, nullsFirst: false })
            .order("photo_created_at", { ascending: false })
            .range((page - 1) * perPage, page * perPage - 1);

        if (error) {
            throw error;
        }

        return NextResponse.json({
            ok: true,
            data: data ?? [],
            pagination: {
                page,
                perPage,
                total: count ?? 0,
                hasMore: (count ?? 0) > page * perPage,
            },
        });
    } catch (error) {
        const message =
            error instanceof Error ? error.message : "Unknown error.";
        console.error("[api/admin/gallery-photos] PATCH failed", error);
        return NextResponse.json(
            { ok: false, error: message },
            { status: 500 },
        );
    }
}

export async function PATCH(request: NextRequest) {
    try {
        const session = await requireAdminSession();

        if (!session) {
            return NextResponse.json(
                { ok: false, error: "Unauthorized." },
                { status: 401 },
            );
        }

        const parsed = patchSchema.safeParse(await request.json());

        if (!parsed.success) {
            return NextResponse.json(
                { ok: false, error: "Invalid request body." },
                { status: 400 },
            );
        }

        const data = await updateGalleryPhotoPickStatus({
            isPicked: parsed.data.isPicked,
            pickedBy:
                session.user?.email ?? session.user?.id ?? "wallora-admin",
            unsplashId: parsed.data.unsplashId,
        });

        return NextResponse.json({
            ok: true,
            data,
        });
    } catch (error) {
        const message =
            error instanceof Error ? error.message : "Unknown error.";
        return NextResponse.json(
            { ok: false, error: message },
            { status: 500 },
        );
    }
}