"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { toast } from "sonner";
import { Plus } from "lucide-react";
import { Button } from "@/components/ui/button";
import { Dialog, DialogContent, DialogHeader, DialogTitle } from "@/components/ui/dialog";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";

export function CreateUserDialog() {
  const router = useRouter();
  const [open, setOpen] = useState(false);
  const [email, setEmail] = useState("");
  const [name, setName] = useState("");
  const [role, setRole] = useState<"user" | "moderator" | "admin">("user");
  const [tier, setTier] = useState<"free" | "pro">("free");
  const [saving, setSaving] = useState(false);

  async function handleCreate() {
    if (!email.trim() || !name.trim()) {
      toast.error("Email and name are required");
      return;
    }
    setSaving(true);
    try {
      const res = await fetch("/api/v1/admin/users", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ email: email.trim(), name: name.trim(), role, tier }),
      });
      if (!res.ok) {
        const data = await res.json().catch(() => ({}));
        throw new Error((data as { error?: string }).error ?? "Failed to create user");
      }
      toast.success("User created — they'll receive an email to set their password");
      setOpen(false);
      setEmail("");
      setName("");
      setRole("user");
      setTier("free");
      router.refresh();
    } catch (err) {
      toast.error(err instanceof Error ? err.message : "Failed to create user");
    } finally {
      setSaving(false);
    }
  }

  return (
    <>
      <Button size="sm" onClick={() => setOpen(true)}>
        <Plus className="h-4 w-4" /> Create user
      </Button>
      <Dialog open={open} onOpenChange={setOpen}>
        <DialogContent className="max-w-md">
          <DialogHeader><DialogTitle>Create user</DialogTitle></DialogHeader>
          <div className="space-y-4">
            <div className="space-y-2">
              <Label htmlFor="new-user-email">Email</Label>
              <Input id="new-user-email" type="email" value={email} onChange={(e) => setEmail(e.target.value)} />
            </div>
            <div className="space-y-2">
              <Label htmlFor="new-user-name">Name</Label>
              <Input id="new-user-name" value={name} onChange={(e) => setName(e.target.value)} />
            </div>
            <div className="grid grid-cols-2 gap-4">
              <div className="space-y-2">
                <Label>Role</Label>
                <Select value={role} onValueChange={(v) => setRole(v as typeof role)}>
                  <SelectTrigger><SelectValue /></SelectTrigger>
                  <SelectContent>
                    <SelectItem value="user">User</SelectItem>
                    <SelectItem value="moderator">Moderator</SelectItem>
                    <SelectItem value="admin">Admin</SelectItem>
                  </SelectContent>
                </Select>
              </div>
              <div className="space-y-2">
                <Label>Tier</Label>
                <Select value={tier} onValueChange={(v) => setTier(v as typeof tier)}>
                  <SelectTrigger><SelectValue /></SelectTrigger>
                  <SelectContent>
                    <SelectItem value="free">Free</SelectItem>
                    <SelectItem value="pro">Pro</SelectItem>
                  </SelectContent>
                </Select>
              </div>
            </div>
            <Button onClick={() => { void handleCreate(); }} disabled={saving} className="w-full">
              {saving ? "Creating…" : "Create user"}
            </Button>
          </div>
        </DialogContent>
      </Dialog>
    </>
  );
}
