import { redirect } from "next/navigation";
import { desc, eq, inArray } from "drizzle-orm";
import { getSession } from "@/lib/session";
import { db } from "@/db";
import { members, promotions, socialPosts, users } from "@/db/schema";
import { can } from "@/lib/rbac";
import { configuredNetworks, SOCIAL_LABELS } from "@/lib/social";
import { moderatePromo, retryPromoShare } from "../actions";
import { PromoImage } from "@/components/PromoImage";
import { MemberAvatar } from "@/components/MemberAvatar";
import { SOCIAL_BRAND, SocialIcon } from "@/components/SocialIcons";
import { formatValidity, visibilityNote } from "@/lib/promo-validity";
import { formatSchedule, scheduleLabel, toScheduleInput } from "@/lib/promo-schedule";

export const dynamic = "force-dynamic";

const STRIPE_WARM =
  "repeating-linear-gradient(45deg,#efe9da,#efe9da 11px,#e6ddc9 11px,#e6ddc9 22px)";
const STRIPE_COOL =
  "repeating-linear-gradient(45deg,#eef0ec,#eef0ec 11px,#e2e8e6 11px,#e2e8e6 22px)";

const STATUS_CHIP: Record<string, { label: string; bg: string; color: string }> = {
  pending: { label: "En attente", bg: "#fbeede", color: "#9a6638" },
  live: { label: "En ligne", bg: "#e6f4ec", color: "#1f8a5b" },
  suspended: { label: "Suspendue", bg: "#fbe9e6", color: "#d8472b" },
  scheduled: { label: "Programmée", bg: "#eaf0f6", color: "#2C6FB3" },
};

function fmtDate(d: Date) {
  return new Date(d).toLocaleDateString("fr-FR", { day: "numeric", month: "long", year: "numeric" });
}

export default async function PromotionsPage() {
  const session = await getSession();
  if (!can(session?.user.role, "moderatePromos")) {
    redirect("/backend");
  }
  const canShare = can(session?.user.role, "publishSocial");
  const networks = canShare ? await configuredNetworks() : [];

  const rows = await db
    .select({
      id: promotions.id,
      title: promotions.title,
      text: promotions.text,
      category: promotions.category,
      status: promotions.status,
      publishAt: promotions.publishAt,
      validUntil: promotions.validUntil,
      startsOn: promotions.startsOn,
      endsOn: promotions.endsOn,
      imageUrl: promotions.imageUrl,
      suspendedBy: promotions.suspendedBy,
      suspendedAt: promotions.suspendedAt,
      shareFacebook: promotions.shareFacebook,
      shareLinkedin: promotions.shareLinkedin,
      memberName: members.name,
      memberLogoUrl: members.logoUrl,
    })
    .from(promotions)
    .leftJoin(members, eq(promotions.memberId, members.id))
    .where(inArray(promotions.status, ["pending", "live", "suspended", "scheduled"]))
    .orderBy(desc(promotions.createdAt));

  const pending = rows.filter((r) => r.status === "pending");
  const live = rows.filter((r) => r.status === "live");
  const suspended = rows.filter((r) => r.status === "suspended");
  const scheduled = rows.filter((r) => r.status === "scheduled");
  // En attente d'abord, puis les programmées (elles attendent une décision de
  // calendrier), puis les offres en ligne et enfin les suspendues.
  const ordered = [...pending, ...scheduled, ...live, ...suspended];

  const shares = ordered.length
    ? await db
        .select({
          promotionId: socialPosts.promotionId,
          network: socialPosts.network,
          status: socialPosts.status,
          url: socialPosts.url,
          error: socialPosts.error,
          createdAt: socialPosts.createdAt,
          authorName: users.name,
        })
        .from(socialPosts)
        .leftJoin(users, eq(socialPosts.postedById, users.id))
        .where(inArray(socialPosts.promotionId, ordered.map((r) => r.id)))
        .orderBy(desc(socialPosts.createdAt))
    : [];

  // La liste est triée du plus récent au plus ancien : la première occurrence
  // rencontrée pour un couple (promo, réseau) est donc la plus récente.
  const lastShare = new Map<string, (typeof shares)[number]>();
  for (const s of shares) {
    const key = `${s.promotionId}:${s.network}`;
    if (!lastShare.has(key)) lastShare.set(key, s);
  }

  return (
    <div>
      <div style={{ display: "flex", gap: 10, marginBottom: 18, flexWrap: "wrap" }}>
        <span style={{ background: "#13324F", color: "#fff", fontSize: 13, fontWeight: 600, padding: "8px 16px", borderRadius: 999 }}>
          En attente · {pending.length}
        </span>
        <span style={{ background: "#fff", border: "1px solid #e6dcc6", color: "#6c6150", fontSize: 13, fontWeight: 600, padding: "8px 16px", borderRadius: 999 }}>
          Programmées · {scheduled.length}
        </span>
        <span style={{ background: "#fff", border: "1px solid #e6dcc6", color: "#6c6150", fontSize: 13, fontWeight: 600, padding: "8px 16px", borderRadius: 999 }}>
          En ligne · {live.length}
        </span>
        <span style={{ background: "#fff", border: "1px solid #e6dcc6", color: "#6c6150", fontSize: 13, fontWeight: 600, padding: "8px 16px", borderRadius: 999 }}>
          Suspendues · {suspended.length}
        </span>
      </div>

      {canShare && networks.length === 0 && (
        <div style={{ background: "#fbeede", border: "1px solid #ecd8b8", color: "#9a6638", borderRadius: 12, padding: "12px 16px", marginBottom: 18, fontSize: 13.5, lineHeight: 1.55 }}>
          Publication sur les réseaux indisponible : aucun jeton d&apos;accès Facebook ou LinkedIn
          n&apos;est configuré sur le serveur (voir <code>.env.example</code>).
        </div>
      )}

      {ordered.length === 0 && (
        <div style={{ background: "#fff", border: "1px solid #e6dcc6", borderRadius: 16, padding: 28, color: "#a99c82", fontSize: 14 }}>
          Aucune promotion pour le moment.
        </div>
      )}

      <div className="grid grid-3" style={{ gap: 16, width: "100%", maxWidth: 960 }}>
        {ordered.map((p) => {
          const isPending = p.status === "pending";
          const isSuspended = p.status === "suspended";
          const isScheduled = p.status === "scheduled";
          const chip = STATUS_CHIP[p.status] ?? STATUS_CHIP.pending;
          const chosenNetworks = networks.filter((n) =>
            n === "facebook" ? p.shareFacebook : p.shareLinkedin
          );
          return (
            <article
              key={p.id}
              style={{
                background: "#fff",
                border: "1px solid #e6dcc6",
                borderRadius: 16,
                overflow: "hidden",
                display: "flex",
                flexDirection: "column",
              }}
            >
              <div
                style={{
                  position: "relative",
                  aspectRatio: "4 / 3",
                  background: isPending ? STRIPE_COOL : STRIPE_WARM,
                  overflow: "hidden",
                  display: "flex",
                  alignItems: "center",
                  justifyContent: "center",
                  opacity: isSuspended ? 0.55 : 1,
                }}
              >
                {p.imageUrl && <PromoImage src={p.imageUrl} alt={p.title ?? ""} />}
                {p.category && (
                  <span style={{ position: "absolute", top: 10, left: 10, background: "#9a6638", color: "#fff", borderRadius: 999, padding: "4px 11px", fontSize: 11, fontWeight: 700 }}>
                    {p.category}
                  </span>
                )}
                <span
                  style={{
                    position: "absolute",
                    top: 10,
                    right: 10,
                    borderRadius: 999,
                    padding: "4px 11px",
                    fontSize: 11,
                    fontWeight: 800,
                    background: chip.bg,
                    color: chip.color,
                  }}
                >
                  {chip.label}
                </span>
              </div>
              <div style={{ padding: "13px 14px 14px", display: "flex", flexDirection: "column", flex: 1 }}>
                <h3 className="font-display" style={{ fontWeight: 700, fontSize: 15.5, margin: "0 0 4px", color: "#26201a" }}>
                  {p.title}
                </h3>
                <div style={{ display: "flex", alignItems: "center", gap: 8, marginBottom: 8 }}>
                  <MemberAvatar name={p.memberName ?? ""} logoUrl={p.memberLogoUrl} size={24} />
                  <span style={{ fontSize: 12.5, color: "#9a6638", fontWeight: 600 }}>{p.memberName}</span>
                </div>
                <p style={{ margin: "0 0 12px", fontSize: 12.5, color: "#8c8068", lineHeight: 1.45, flex: 1 }}>
                  {p.text}
                </p>

                {/* Le modérateur voit la période de validité avant de valider :
                    c'est elle qui partira dans le message réseaux sociaux. */}
                {formatValidity(p) && (
                  <div style={{ fontSize: 12, color: "#9a8d72", fontWeight: 600, margin: "0 0 12px" }}>
                    {formatValidity(p)}
                  </div>
                )}

                {p.status === "live" && visibilityNote(p) && (
                  <div style={{ background: "#faf7ef", border: "1px solid #f0e8d6", color: "#9a8d72", borderRadius: 10, padding: "9px 11px", fontSize: 12, lineHeight: 1.45, marginBottom: 11 }}>
                    {visibilityNote(p)}
                  </div>
                )}

                {isScheduled && (
                  <div style={{ background: "#eaf0f6", border: "1px solid #d3e0ee", color: "#2C6FB3", borderRadius: 10, padding: "9px 11px", fontSize: 12, lineHeight: 1.45, marginBottom: 11, fontWeight: 600 }}>
                    {scheduleLabel(p.publishAt)}. Rien n&apos;est encore visible ni diffusé.
                  </div>
                )}

                {isSuspended && (
                  <div style={{ background: "#fbe9e6", border: "1px solid #f2d5cf", color: "#a8503c", borderRadius: 10, padding: "9px 11px", fontSize: 12, lineHeight: 1.45, marginBottom: 11 }}>
                    Suspendue par {p.suspendedBy === "member" ? "l'adhérent" : "l'association"}
                    {p.suspendedAt ? ` le ${fmtDate(p.suspendedAt)}` : ""}.
                  </div>
                )}

                {isPending && (
                  <div style={{ display: "flex", gap: 8, alignItems: "stretch" }}>
                    {/* Les cases vivent dans le formulaire « Valider » : c'est le
                        seul et dernier moment où la diffusion est ajustable. */}
                    <form action={moderatePromo} style={{ flex: 1 }}>
                      <input type="hidden" name="id" value={p.id} />
                      <input type="hidden" name="action" value="approve" />
                      {networks.length > 0 && (
                        <div style={{ background: "#faf7ef", border: "1px solid #f0e8d6", borderRadius: 10, padding: "10px 11px", marginBottom: 8 }}>
                          <div style={{ fontSize: 10.5, letterSpacing: "0.08em", textTransform: "uppercase", color: "#9a8d72", fontWeight: 800, marginBottom: 7 }}>
                            Diffusion demandée
                          </div>
                          <div style={{ display: "flex", flexDirection: "column", gap: 6 }}>
                            {networks.map((network) => (
                              <label key={network} style={{ display: "flex", alignItems: "center", gap: 7, fontSize: 12.5, fontWeight: 700, color: SOCIAL_BRAND[network], cursor: "pointer" }}>
                                <input
                                  type="checkbox"
                                  name={network === "facebook" ? "shareFacebook" : "shareLinkedin"}
                                  defaultChecked={network === "facebook" ? p.shareFacebook : p.shareLinkedin}
                                  style={{ accentColor: SOCIAL_BRAND[network], margin: 0 }}
                                />
                                <SocialIcon network={network} size={14} />
                                {SOCIAL_LABELS[network]}
                              </label>
                            ))}
                          </div>
                          <div style={{ fontSize: 11, color: "#a99c82", marginTop: 7, lineHeight: 1.45 }}>
                            Diffusé en même temps que la mise en ligne : tout de suite si le
                            champ Publication est vide, à la date indiquée sinon. Ce choix
                            n&apos;est plus modifiable ensuite.
                          </div>
                        </div>
                      )}
                      {/* Date demandée par l'adhérent, modifiable ici. Vidée,
                          la promotion part immédiatement. */}
                      <div style={{ background: "#faf7ef", border: "1px solid #f0e8d6", borderRadius: 10, padding: "10px 11px", marginBottom: 8 }}>
                        <label style={{ display: "block", fontSize: 10.5, letterSpacing: "0.08em", textTransform: "uppercase", color: "#9a8d72", fontWeight: 800, marginBottom: 7 }}>
                          Publication
                        </label>
                        <input
                          type="datetime-local"
                          name="publishAt"
                          defaultValue={toScheduleInput(p.publishAt)}
                          style={{ width: "100%", boxSizing: "border-box", border: "1px solid #e6dcc6", borderRadius: 8, padding: "7px 9px", fontSize: 12.5, fontFamily: "inherit", color: "#3c3322", background: "#fff" }}
                        />
                        <div style={{ fontSize: 11, color: "#a99c82", marginTop: 7, lineHeight: 1.45 }}>
                          {p.publishAt
                            ? `Demandé par l'adhérent ${formatSchedule(p.publishAt)}. Videz le champ pour publier tout de suite.`
                            : "Vide : mise en ligne immédiate. Renseignez une date pour programmer."}
                        </div>
                      </div>
                      <button type="submit" style={{ width: "100%", border: "none", background: "#1f8a5b", color: "#fff", fontWeight: 700, fontSize: 13, padding: 10, borderRadius: 9, cursor: "pointer" }}>
                        Valider
                      </button>
                    </form>
                    {/* Aligné en bas pour rester au niveau du bouton Valider,
                        que le bloc diffusion rend plus haut. */}
                    <form action={moderatePromo} style={{ flex: 1, display: "flex", flexDirection: "column", justifyContent: "flex-end" }}>
                      <input type="hidden" name="id" value={p.id} />
                      <input type="hidden" name="action" value="reject" />
                      <button type="submit" style={{ width: "100%", border: "1px solid #e0c3bb", background: "#fff", color: "#d8472b", fontWeight: 700, fontSize: 13, padding: 10, borderRadius: 9, cursor: "pointer" }}>
                        Refuser
                      </button>
                    </form>
                  </div>
                )}

                {isScheduled && (
                  <form action={moderatePromo} style={{ marginBottom: 8 }}>
                    <input type="hidden" name="id" value={p.id} />
                    <input type="hidden" name="action" value="publish-now" />
                    <button type="submit" style={{ width: "100%", border: "none", background: "#2C6FB3", color: "#fff", fontWeight: 700, fontSize: 13, padding: 10, borderRadius: 9, cursor: "pointer" }}>
                      Publier maintenant
                    </button>
                  </form>
                )}

                {!isPending && (
                  <div style={{ display: "flex", gap: 8 }}>
                    <form action={moderatePromo} style={{ flex: 1 }}>
                      <input type="hidden" name="id" value={p.id} />
                      <input type="hidden" name="action" value={isSuspended ? "restore" : "suspend"} />
                      <button
                        type="submit"
                        style={{
                          width: "100%",
                          border: isSuspended ? "none" : "1px solid #e0c3bb",
                          background: isSuspended ? "#1f8a5b" : "#fff",
                          color: isSuspended ? "#fff" : "#d8472b",
                          fontWeight: 700,
                          fontSize: 13,
                          padding: 10,
                          borderRadius: 9,
                          cursor: "pointer",
                        }}
                      >
                        {isSuspended ? "Remettre en ligne" : "Suspendre"}
                      </button>
                    </form>
                    <form action={moderatePromo}>
                      <input type="hidden" name="id" value={p.id} />
                      <input type="hidden" name="action" value="remove" />
                      <button type="submit" style={{ border: "1px solid #e6dcc6", background: "#fff", color: "#a99c82", fontWeight: 700, fontSize: 13, padding: "10px 12px", borderRadius: 9, cursor: "pointer" }}>
                        Supprimer
                      </button>
                    </form>
                  </div>
                )}

                {!isPending && chosenNetworks.length > 0 && (
                  <div style={{ borderTop: "1px solid #f0e8d6", marginTop: 12, paddingTop: 11 }}>
                    <div style={{ fontSize: 10.5, letterSpacing: "0.1em", textTransform: "uppercase", color: "#9a8d72", fontWeight: 800, marginBottom: 8 }}>
                      Diffusion réseaux
                    </div>
                    {chosenNetworks.map((network) => {
                      const last = lastShare.get(`${p.id}:${network}`);
                      const posted = last?.status === "posted";
                      return (
                        <div key={network} style={{ marginBottom: 8 }}>
                          <div style={{ display: "flex", alignItems: "center", gap: 7, fontSize: 12, fontWeight: 700, color: posted ? "#1f8a5b" : "#d8472b" }}>
                            <span style={{ color: SOCIAL_BRAND[network], display: "inline-flex" }}>
                              <SocialIcon network={network} size={14} />
                            </span>
                            {SOCIAL_LABELS[network]} ·{" "}
                            {posted ? `publié le ${fmtDate(last!.createdAt)}` : "non publié"}
                            {posted && last?.url && (
                              <a href={last.url} target="_blank" rel="noopener noreferrer" style={{ color: "#2C6FB3", fontWeight: 700 }}>
                                voir
                              </a>
                            )}
                          </div>
                          {!posted && last?.error && (
                            <div style={{ fontSize: 11, color: "#a8503c", lineHeight: 1.45, marginTop: 3 }}>
                              {last.error.slice(0, 200)}
                            </div>
                          )}
                          {!posted && p.status === "live" && (
                            <form action={retryPromoShare} style={{ marginTop: 6 }}>
                              <input type="hidden" name="id" value={p.id} />
                              <input type="hidden" name="network" value={network} />
                              <button
                                type="submit"
                                style={{
                                  border: `1px solid ${SOCIAL_BRAND[network]}`,
                                  background: "#fff",
                                  color: SOCIAL_BRAND[network],
                                  fontWeight: 700,
                                  fontSize: 12,
                                  padding: "7px 12px",
                                  borderRadius: 8,
                                  cursor: "pointer",
                                }}
                              >
                                Réessayer sur {SOCIAL_LABELS[network]}
                              </button>
                            </form>
                          )}
                        </div>
                      );
                    })}
                  </div>
                )}
              </div>
            </article>
          );
        })}
      </div>
    </div>
  );
}