import type { Metadata } from "next";
import Link from "next/link";
import { notFound } from "next/navigation";
import { CatalogStatus } from "@/components/catalogs";
import { ActionForm, SubmitButton } from "@/components/forms";
import { formatSize, RatingTag } from "@/components/products";
import { PageHeader, Tag } from "@/components/status";
import { DateTime } from "@/components/time";
import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Field, FieldLabel } from "@/components/ui/field";
import { Input } from "@/components/ui/input";
import { NativeSelect, NativeSelectOption } from "@/components/ui/native-select";
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
import { api, unwrap, type CatalogMember, type CatalogPage } from "@/lib/api";
import { AuditTable } from "../../audit-table";
import { ConsoleNav, requireConsole } from "../../console-nav";
import {
  addOperator,
  createInvite,
  decideMember,
  delist,
  removeFromTeam,
  revokeInvite,
  rotateKey,
  saveCatalog,
  setSuspended,
} from "../actions";

export const metadata: Metadata = { title: "Catalog" };

type Perm = CatalogPage["permissions"][number];

export default async function ManageCatalog({ params }: { params: Promise<{ id: string }> }) {
  const { id } = await params;
  const { me } = await requireConsole(`/console/catalogs/${id}`);
  const answer = await api.catalogs({ id }).get();
  if (answer.error) notFound();
  const data = unwrap(answer);
  const has = (p: Perm) => data.permissions.includes(p);
  if (!has("audit:read")) notFound();
  const c = data.catalog;

  const [team, members, invites, hosted, audit] = await Promise.all([
    api.catalogs({ id }).team.get().then(unwrap),
    has("member:approve") ? api.catalogs({ id }).members.get().then(unwrap) : undefined,
    has("member:invite") ? api.catalogs({ id }).invites.get().then(unwrap) : undefined,
    api.catalogs({ id }).products.get().then(unwrap),
    api.console.audit.get({ query: { catalog: id, limit: 20 } }).then(unwrap),
  ]);
  const byStatus = (s: CatalogMember["status"]) => members?.members.filter((m) => m.status === s) ?? [];
  const onTeam = team.roles.some((r) => r.personId === me.id);

  return (
    <>
      <PageHeader title={c.name}>
        <span className="flex flex-wrap items-center gap-2">
          <CatalogStatus status={c.status} />
          <span className="font-mono text-xs">{c.url}</span>
          {c.status === "approved" && (
            <Link href={`/catalogs/${id}`} className="text-sm underline-offset-4 hover:underline">
              Public page
            </Link>
          )}
        </span>
      </PageHeader>
      <ConsoleNav />
      <div className="space-y-6">
        {(c.status === "suspended" || c.status === "rejected") && (
          <Alert>
            <AlertTitle>{c.status === "suspended" ? "Suspended by moderation" : "Rejected"}</AlertTitle>
            <AlertDescription>
              {c.statusReason || "No reason given."}{" "}
              {c.status === "suspended" && "Its products aren't available from it, and it can't take uploads."}
            </AlertDescription>
          </Alert>
        )}

        <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
          <Stat label="Products" value={String(data.hosted.products)} note={`${data.hosted.revisions} revisions`} />
          <Stat label="Storage" value={formatSize(data.hosted.bytes)} note="in the revisions it hosts" />
          {data.members && (
            <>
              <Stat label="Members" value={String(data.members.members)} note={`${data.members.banned} banned`} />
              <Stat label="Requests" value={String(data.members.requests)} note="waiting" />
            </>
          )}
        </div>

        <Card>
          <CardHeader>
            <CardTitle>Settings</CardTitle>
            {!has("catalog:edit") && <CardDescription>Only the owner and operators change these.</CardDescription>}
          </CardHeader>
          <CardContent>
            <ActionForm action={saveCatalog} fields={{ id }}>
              <fieldset disabled={!has("catalog:edit")} className="grid gap-4 sm:grid-cols-2">
                <Field>
                  <FieldLabel htmlFor="name">Name</FieldLabel>
                  <Input id="name" name="name" defaultValue={c.name} required maxLength={64} />
                </Field>
                <Field>
                  <FieldLabel htmlFor="url">Address</FieldLabel>
                  <Input id="url" name="url" type="url" defaultValue={c.url} required maxLength={300} />
                </Field>
                <Field>
                  <FieldLabel htmlFor="contact">Takedown contact</FieldLabel>
                  <Input id="contact" name="contact" defaultValue={c.contact} required maxLength={200} />
                </Field>
                <Choice
                  name="visibility"
                  label="Visibility"
                  value={c.visibility}
                  options={[
                    ["public", "Public (listed)"],
                    ["private", "Private (by link)"],
                  ]}
                />
                <Choice
                  name="membership"
                  label="Membership"
                  value={c.membership}
                  options={[
                    ["open", "Open"],
                    ["approval", "By approval"],
                    ["invite", "Invite only"],
                  ]}
                />
                <Choice
                  name="maxRating"
                  label="Highest rating"
                  value={c.maxRating}
                  options={[
                    ["general", "General only"],
                    ["adult", "Adult too"],
                  ]}
                />
                <Choice
                  name="uploads"
                  label="Who may upload"
                  value={c.uploads}
                  options={[
                    ["anyone", "Anyone"],
                    ["members", "Members"],
                    ["team", "Only the team"],
                  ]}
                />
                <Choice
                  name="mirrors"
                  label="Mirroring others' products"
                  value={c.mirrors}
                  options={[
                    ["auto", "Accept"],
                    ["approve", "Team approves"],
                    ["off", "Off"],
                  ]}
                />
              </fieldset>
              {has("catalog:edit") && <SubmitButton pendingLabel="Saving…">Save</SubmitButton>}
            </ActionForm>
          </CardContent>
        </Card>

        {has("catalog:rotate-key") && (
          <Card>
            <CardHeader>
              <CardTitle>Key</CardTitle>
              <CardDescription>
                The catalog signs in to the hub with its ID ({id}) and key. A new key stops the old one at once.
              </CardDescription>
            </CardHeader>
            <CardContent>
              <ActionForm action={rotateKey} fields={{ id }}>
                <SubmitButton variant="outline" pendingLabel="Making one…" confirm="The old key stops working at once. Go on?">
                  New key
                </SubmitButton>
              </ActionForm>
            </CardContent>
          </Card>
        )}

        <Card>
          <CardHeader>
            <CardTitle>Team</CardTitle>
            <CardDescription>The owner, and operators: they manage everything but the team itself.</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <ul className="divide-y text-sm">
              {team.owner && (
                <li className="flex items-center justify-between py-2">
                  <span>{team.owner.username}</span>
                  <Tag tone="strong">owner</Tag>
                </li>
              )}
              {team.roles.map((r) => (
                <li key={r.personId + r.role} className="flex items-center justify-between gap-2 py-2">
                  <span>{r.username}</span>
                  <span className="flex items-center gap-2">
                    <Tag>operator</Tag>
                    {(has("team:manage") || r.personId === me.id) && (
                      <ActionForm action={removeFromTeam} fields={{ id, username: r.username }}>
                        <SubmitButton
                          size="sm"
                          variant="outline"
                          pendingLabel="Removing…"
                          confirm={r.personId === me.id ? "Leave this catalog's team?" : `Take ${r.username} off the team?`}
                        >
                          {r.personId === me.id ? "Leave" : "Remove"}
                        </SubmitButton>
                      </ActionForm>
                    )}
                  </span>
                </li>
              ))}
            </ul>
            {has("team:manage") && (
              <ActionForm action={addOperator} fields={{ id }}>
                <div className="flex max-w-md gap-2">
                  <Input name="username" placeholder="T5DE username" aria-label="Username" required maxLength={64} />
                  <SubmitButton pendingLabel="Adding…">Add operator</SubmitButton>
                </div>
              </ActionForm>
            )}
            {!onTeam && team.owner?.personId !== me.id && (
              <p className="text-sm text-muted-foreground">You see this as a moderator.</p>
            )}
          </CardContent>
        </Card>

        {members && (
          <Card>
            <CardHeader>
              <CardTitle>Members</CardTitle>
              <CardDescription>
                {c.membership === "open"
                  ? "Open: anyone can get its products. Bans still apply."
                  : c.membership === "approval"
                    ? "By approval: people ask, the team decides."
                    : "Invite only: people join with an invitation."}
              </CardDescription>
            </CardHeader>
            <CardContent className="space-y-6">
              <MemberList id={id} title="Requests" members={byStatus("requested")} actions={["approve", "decline"]} />
              <MemberList id={id} title="Members" members={byStatus("member")} actions={["ban", "remove"]} />
              <MemberList id={id} title="Banned" members={byStatus("banned")} actions={["unban"]} />
              <ActionForm action={decideMember} fields={{ id, decision: "add" }}>
                <div className="flex max-w-md gap-2">
                  <Input name="username" placeholder="T5DE username" aria-label="Username" required maxLength={64} />
                  <SubmitButton variant="outline" pendingLabel="Adding…">
                    Add member
                  </SubmitButton>
                </div>
              </ActionForm>
            </CardContent>
          </Card>
        )}

        {invites && (
          <Card>
            <CardHeader>
              <CardTitle>Invitations</CardTitle>
              <CardDescription>Links that let people join (also an approval or invite-only catalog) at once.</CardDescription>
            </CardHeader>
            <CardContent className="space-y-4">
              {invites.invites.length > 0 && (
                <Table>
                  <TableHeader>
                    <TableRow>
                      <TableHead>Link</TableHead>
                      <TableHead>Used</TableHead>
                      <TableHead>Expires</TableHead>
                      <TableHead />
                    </TableRow>
                  </TableHeader>
                  <TableBody>
                    {invites.invites.map((i) => (
                      <TableRow key={i.code}>
                        <TableCell className="font-mono text-xs break-all whitespace-normal">{i.url}</TableCell>
                        <TableCell className="tabular-nums">
                          {i.uses}
                          {i.maxUses !== null && ` of ${i.maxUses}`}
                        </TableCell>
                        <TableCell className="text-muted-foreground">
                          {i.expiresAt ? <DateTime iso={i.expiresAt} dateOnly /> : "never"}
                        </TableCell>
                        <TableCell className="text-right">
                          <ActionForm action={revokeInvite} fields={{ id, code: i.code }}>
                            <SubmitButton size="sm" variant="outline" pendingLabel="Revoking…">
                              Revoke
                            </SubmitButton>
                          </ActionForm>
                        </TableCell>
                      </TableRow>
                    ))}
                  </TableBody>
                </Table>
              )}
              <ActionForm action={createInvite} fields={{ id }}>
                <div className="flex flex-wrap items-end gap-2">
                  <Field className="w-36">
                    <FieldLabel htmlFor="maxUses">Uses</FieldLabel>
                    <Input id="maxUses" name="maxUses" type="number" min={1} max={10000} placeholder="Any" />
                  </Field>
                  <Field className="w-36">
                    <FieldLabel htmlFor="expiresInDays">Days</FieldLabel>
                    <Input id="expiresInDays" name="expiresInDays" type="number" min={1} max={365} placeholder="Never" />
                  </Field>
                  <SubmitButton pendingLabel="Making it…">New invitation</SubmitButton>
                </div>
              </ActionForm>
            </CardContent>
          </Card>
        )}

        <Card>
          <CardHeader>
            <CardTitle>Products</CardTitle>
            <CardDescription>What it hosts. Delisting stops hosting a product here; other catalogs may still host it.</CardDescription>
          </CardHeader>
          <CardContent>
            {hosted.products.length === 0 ? (
              <p className="text-sm text-muted-foreground">Nothing yet.</p>
            ) : (
              <Table>
                <TableHeader>
                  <TableRow>
                    <TableHead>Product</TableHead>
                    <TableHead>Creator</TableHead>
                    <TableHead>Revisions</TableHead>
                    <TableHead>Since</TableHead>
                    {has("hosting:delist") && <TableHead />}
                  </TableRow>
                </TableHeader>
                <TableBody>
                  {hosted.products.map((p) => (
                    <TableRow key={p.id}>
                      <TableCell className="font-medium">
                        <Link href={`/products/${p.id}`} className="underline-offset-4 hover:underline">
                          {p.name}
                        </Link>{" "}
                        <RatingTag rating={p.rating === "adult" ? "adult" : "general"} />{" "}
                        {p.removed && <Tag tone="danger">removed</Tag>}
                        {p.deleted && <Tag>deleted</Tag>}
                      </TableCell>
                      <TableCell>{p.creator}</TableCell>
                      <TableCell className="tabular-nums">{p.revisions.join(", ")}</TableCell>
                      <TableCell className="text-muted-foreground">
                        <DateTime iso={p.since} dateOnly />
                      </TableCell>
                      {has("hosting:delist") && (
                        <TableCell className="text-right">
                          <ActionForm action={delist} fields={{ id, product: p.id }}>
                            <div className="flex justify-end gap-2">
                              <Input name="reason" placeholder="Reason" aria-label="Reason" required maxLength={500} className="h-8 w-40" />
                              <SubmitButton size="sm" variant="outline" pendingLabel="Delisting…" confirm={`Stop hosting ${p.name}?`}>
                                Delist
                              </SubmitButton>
                            </div>
                          </ActionForm>
                        </TableCell>
                      )}
                    </TableRow>
                  ))}
                </TableBody>
              </Table>
            )}
          </CardContent>
        </Card>

        {has("catalog:suspend") && (c.status === "approved" || c.status === "suspended") && (
          <Card>
            <CardHeader>
              <CardTitle>Moderation</CardTitle>
              <CardDescription>
                A suspended catalog's products aren't available from it, it can't take uploads, and its team sees why.
              </CardDescription>
            </CardHeader>
            <CardContent>
              <ActionForm action={setSuspended} fields={{ id }}>
                {c.status === "suspended" ? (
                  <SubmitButton name="intent" value="reinstate" pendingLabel="Reinstating…">
                    Reinstate
                  </SubmitButton>
                ) : (
                  <div className="flex max-w-xl gap-2">
                    <Input name="reason" placeholder="Reason (shown to its team)" aria-label="Reason" required maxLength={500} />
                    <SubmitButton name="intent" value="suspend" variant="outline" pendingLabel="Suspending…" confirm={`Suspend ${c.name}?`}>
                      Suspend
                    </SubmitButton>
                  </div>
                )}
              </ActionForm>
            </CardContent>
          </Card>
        )}

        <Card>
          <CardHeader>
            <CardTitle>Recent Changes</CardTitle>
            <CardDescription>
              <Link href={`/console/audit?catalog=${id}`} className="underline-offset-4 hover:underline">
                All changes to this catalog
              </Link>
            </CardDescription>
          </CardHeader>
          <CardContent>
            <AuditTable entries={audit.entries} />
          </CardContent>
        </Card>
      </div>
    </>
  );
}

function Stat({ label, value, note }: { label: string; value: string; note: string }) {
  return (
    <Card>
      <CardHeader>
        <CardDescription>{label}</CardDescription>
        <CardTitle className="text-3xl font-semibold tabular-nums">{value}</CardTitle>
      </CardHeader>
      <CardContent className="text-sm text-muted-foreground">{note}</CardContent>
    </Card>
  );
}

function Choice({ name, label, value, options }: { name: string; label: string; value: string; options: [string, string][] }) {
  return (
    <Field>
      <FieldLabel htmlFor={name}>{label}</FieldLabel>
      <NativeSelect id={name} name={name} defaultValue={value} className="w-full">
        {options.map(([v, l]) => (
          <NativeSelectOption key={v} value={v}>
            {l}
          </NativeSelectOption>
        ))}
      </NativeSelect>
    </Field>
  );
}

const memberActions = {
  approve: { label: "Approve", variant: "default" as const },
  decline: { label: "Decline", variant: "outline" as const },
  ban: { label: "Ban", variant: "outline" as const },
  remove: { label: "Remove", variant: "outline" as const },
  unban: { label: "Unban", variant: "outline" as const },
};

function MemberList({
  id,
  title,
  members,
  actions,
}: {
  id: string;
  title: string;
  members: CatalogMember[];
  actions: (keyof typeof memberActions)[];
}) {
  if (members.length === 0) return null;
  return (
    <div className="space-y-2">
      <h3 className="text-sm font-medium">
        {title} <span className="text-muted-foreground tabular-nums">{members.length}</span>
      </h3>
      <ul className="divide-y text-sm">
        {members.map((m) => (
          <li key={m.personId} className="flex items-center justify-between gap-2 py-2">
            <span>
              {m.username}{" "}
              <span className="text-muted-foreground">
                {m.invited ? "invited, " : ""}
                <DateTime iso={m.since} dateOnly />
              </span>
            </span>
            <ActionForm action={decideMember} fields={{ id, username: m.username }}>
              <div className="flex gap-2">
                {actions.map((a) => (
                  <SubmitButton
                    key={a}
                    size="sm"
                    variant={memberActions[a].variant}
                    name="decision"
                    value={a}
                    confirm={a === "ban" ? `Ban ${m.username} from this catalog?` : undefined}
                  >
                    {memberActions[a].label}
                  </SubmitButton>
                ))}
              </div>
            </ActionForm>
          </li>
        ))}
      </ul>
    </div>
  );
}