"use client";

import { useRouter } from "next/navigation";
import { useState, useTransition } from "react";
import { DoorOpen, Loader2, Trash2 } from "lucide-react";
import { toast } from "sonner";

import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";
import {
  leaveWorkspaceAction,
  removeMemberAction,
  updateMemberRoleAction,
} from "@/lib/appwrite/team-actions";

type Member = {
  id: string;
  userId: string;
  name: string;
  email: string;
  role: string;
  joined: string;
  invited: string;
  confirm: boolean;
};

const ROLE_LABEL: Record<string, string> = {
  owner: "Sahip",
  admin: "Yönetici",
  member: "Üye",
};

export function MembersTable({
  members,
  currentUserId,
  isOwner,
  canManage,
}: {
  members: Member[];
  currentUserId: string;
  isOwner: boolean;
  canManage: boolean;
}) {
  const router = useRouter();
  const [busy, setBusy] = useState<string | null>(null);
  const [, startTransition] = useTransition();
  const [removing, setRemoving] = useState<Member | null>(null);
  const [leaving, setLeaving] = useState(false);

  const setRole = (membershipId: string, role: string) => {
    setBusy(membershipId);
    startTransition(async () => {
      const result = await updateMemberRoleAction({ ok: false }, formDataFor({
        membershipId,
        role,
      }));
      if (result.ok) toast.success("Rol güncellendi.");
      else toast.error(result.error ?? "Rol güncellenemedi.");
      setBusy(null);
    });
  };

  const handleRemove = () => {
    if (!removing) return;
    setBusy(removing.id);
    startTransition(async () => {
      const result = await removeMemberAction({ ok: false }, formDataFor({
        membershipId: removing.id,
      }));
      if (result.ok) {
        toast.success(`${removing.name} ekipten çıkarıldı.`);
        setRemoving(null);
      } else {
        toast.error(result.error ?? "İşlem başarısız.");
      }
      setBusy(null);
    });
  };

  const handleLeave = () => {
    setBusy("leave");
    startTransition(async () => {
      const result = await leaveWorkspaceAction();
      if (result.ok) {
        toast.success("Çalışma alanından ayrıldınız.");
        setLeaving(false);
        router.push("/dashboard");
      } else {
        toast.error(result.error ?? "Ayrılma başarısız.");
      }
      setBusy(null);
    });
  };

  return (
    <>
      <Card>
        <CardHeader>
          <CardTitle>Üyeler ({members.length})</CardTitle>
        </CardHeader>
        <CardContent>
          <Table>
            <TableHeader>
              <TableRow>
                <TableHead>İsim</TableHead>
                <TableHead>Email</TableHead>
                <TableHead>Rol</TableHead>
                <TableHead className="text-right">İşlem</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {members.map((m) => {
                const isSelf = m.userId === currentUserId;
                const isMemberOwner = m.role === "owner";
                return (
                  <TableRow key={m.id}>
                    <TableCell className="font-medium">
                      {m.name}
                      {isSelf && (
                        <Badge variant="secondary" className="ml-2 text-xs">
                          Siz
                        </Badge>
                      )}
                    </TableCell>
                    <TableCell className="text-muted-foreground">{m.email}</TableCell>
                    <TableCell>
                      {isOwner && !isMemberOwner && !isSelf ? (
                        <Select
                          value={m.role}
                          disabled={busy === m.id}
                          onValueChange={(v) => setRole(m.id, v)}
                        >
                          <SelectTrigger className="w-[120px]">
                            <SelectValue />
                          </SelectTrigger>
                          <SelectContent>
                            <SelectItem value="member">Üye</SelectItem>
                            <SelectItem value="admin">Yönetici</SelectItem>
                          </SelectContent>
                        </Select>
                      ) : (
                        <Badge variant={isMemberOwner ? "default" : "outline"}>
                          {ROLE_LABEL[m.role] ?? m.role}
                        </Badge>
                      )}
                    </TableCell>
                    <TableCell className="text-right">
                      {isSelf ? (
                        <Button
                          type="button"
                          variant="ghost"
                          size="sm"
                          className="text-muted-foreground"
                          disabled={busy === "leave"}
                          onClick={() => setLeaving(true)}
                        >
                          {busy === "leave" ? (
                            <Loader2 className="size-3.5 animate-spin" />
                          ) : (
                            <DoorOpen className="size-3.5" />
                          )}
                          Ayrıl
                        </Button>
                      ) : canManage && !isMemberOwner ? (
                        <Button
                          type="button"
                          variant="ghost"
                          size="sm"
                          className="text-destructive hover:text-destructive"
                          disabled={busy === m.id}
                          onClick={() => setRemoving(m)}
                        >
                          {busy === m.id ? (
                            <Loader2 className="size-3.5 animate-spin" />
                          ) : (
                            <Trash2 className="size-3.5" />
                          )}
                          Çıkar
                        </Button>
                      ) : null}
                    </TableCell>
                  </TableRow>
                );
              })}
            </TableBody>
          </Table>
        </CardContent>
      </Card>

      <Dialog
        open={Boolean(removing)}
        onOpenChange={(v) => !v && busy === null && setRemoving(null)}
      >
        <DialogContent>
          <DialogHeader>
            <DialogTitle>Üyeyi ekipten çıkar</DialogTitle>
            <DialogDescription>
              {removing && (
                <>
                  <strong>{removing.name}</strong> ({removing.email}) ekipten çıkarılacak.
                  Verileri silinmez ama bu çalışma alanına erişimi kalkar.
                </>
              )}
            </DialogDescription>
          </DialogHeader>
          <DialogFooter>
            <Button
              variant="outline"
              onClick={() => setRemoving(null)}
              disabled={busy !== null}
            >
              Vazgeç
            </Button>
            <Button
              variant="destructive"
              onClick={handleRemove}
              disabled={busy !== null}
            >
              {busy ? <Loader2 className="size-4 animate-spin" /> : <Trash2 className="size-4" />}
              Çıkar
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>

      <Dialog open={leaving} onOpenChange={(v) => !v && busy === null && setLeaving(false)}>
        <DialogContent>
          <DialogHeader>
            <DialogTitle>Çalışma alanından ayrıl</DialogTitle>
            <DialogDescription>
              Bu çalışma alanındaki tüm verilere erişiminiz kalkar. Tekrar davet edilmedikçe
              giremezsiniz. Devam etmek istediğinize emin misiniz?
            </DialogDescription>
          </DialogHeader>
          <DialogFooter>
            <Button
              variant="outline"
              onClick={() => setLeaving(false)}
              disabled={busy !== null}
            >
              Vazgeç
            </Button>
            <Button
              variant="destructive"
              onClick={handleLeave}
              disabled={busy !== null}
            >
              {busy ? <Loader2 className="size-4 animate-spin" /> : <DoorOpen className="size-4" />}
              Ayrıl
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </>
  );
}

function formDataFor(fields: Record<string, string>): FormData {
  const fd = new FormData();
  for (const [k, v] of Object.entries(fields)) fd.set(k, v);
  return fd;
}