"use client";

import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { useAppForm } from "@/components/ui/tanstack-form";
import { cn } from "@/lib/utils";
import { getSession, signIn } from "next-auth/react";
import { useSearchParams } from "next/navigation";
import { useTransition } from "react";
import { toast } from "sonner";
import * as z from "zod";
import { InteractiveGridPattern } from "./interactive-grid";

const signInSchema = z.object({
  email: z.string().email("Enter a valid email address"),
  password: z.string().min(8, "Password must be at least 8 characters"),
});

export default function SignInViewPage() {
  const searchParams = useSearchParams();
  const callbackUrl = searchParams.get("callbackUrl") ?? "/dashboard/crm";
  const [isPending, startTransition] = useTransition();

  const form = useAppForm({
    defaultValues: {
      email: "",
      password: "",
    },
    validators: {
      onSubmit: signInSchema,
    },
    onSubmit: ({ value }) => {
      startTransition(async () => {
        const result = await signIn("credentials", {
          email: value.email,
          password: value.password,
          redirect: false,
        });

        if (result?.error) {
          toast.error("Invalid email or password");
          return;
        }

        await getSession();
        toast.success("Signed in successfully");
        window.location.assign(callbackUrl);
      });
    },
  });

  return (
    <div className="relative flex min-h-screen flex-col items-center justify-center overflow-hidden md:grid lg:max-w-none lg:grid-cols-2 lg:px-0">
      <div className="relative hidden h-full flex-col p-10 lg:flex dark:border-r">
        <div className="absolute inset-0 bg-sidebar" />
        <div className="text-sidebar-foreground relative z-20 flex items-center text-lg font-medium">
          <svg
            xmlns="http://www.w3.org/2000/svg"
            viewBox="0 0 24 24"
            fill="none"
            stroke="currentColor"
            strokeWidth="2"
            strokeLinecap="round"
            strokeLinejoin="round"
            className="mr-2 h-6 w-6"
          >
            <path d="M15 6v12a3 3 0 1 0 3-3H6a3 3 0 1 0 3 3V6a3 3 0 1 0-3 3h12a3 3 0 1 0-3-3" />
          </svg>
          Auth.js Workspace Login
        </div>
        <InteractiveGridPattern
          className={cn(
            "mask-[radial-gradient(400px_circle_at_center,white,transparent)]",
            "inset-x-0 inset-y-[0%] h-full skew-y-12",
          )}
        />
        <div className="text-sidebar-foreground relative z-20 mt-auto">
          <blockquote className="space-y-2">
            <p className="text-lg">
              &ldquo;Move from template scaffolding to app-owned auth and data
              without tearing up the dashboard UX.&rdquo;
            </p>
            <footer className="text-sidebar-foreground/70 text-sm">
              Training System
            </footer>
          </blockquote>
        </div>
      </div>
      <div className="flex h-full items-center justify-center p-4 lg:p-8">
        <div className="flex w-full max-w-md flex-col items-center justify-center space-y-6">
          <div className="w-full space-y-2 text-center">
            <h1 className="text-2xl font-semibold tracking-tight">
              Sign in to your workspace
            </h1>
            <p className="text-muted-foreground text-sm">
              Use the credentials created for you by a super admin or
              organization admin.
            </p>
          </div>

          <form.AppForm>
            <form.Form className="w-full space-y-4">
              <form.AppField
                name="email"
                children={(field) => (
                  <field.FieldSet>
                    <field.Field>
                      <field.FieldLabel htmlFor={field.name}>
                        Email
                      </field.FieldLabel>
                      <Input
                        id={field.name}
                        name={field.name}
                        type="email"
                        value={field.state.value}
                        onBlur={field.handleBlur}
                        onChange={(event) =>
                          field.handleChange(event.target.value)
                        }
                        placeholder="you@example.com"
                        disabled={isPending}
                      />
                    </field.Field>
                    <field.FieldError />
                  </field.FieldSet>
                )}
              />

              <form.AppField
                name="password"
                children={(field) => (
                  <field.FieldSet>
                    <field.Field>
                      <field.FieldLabel htmlFor={field.name}>
                        Password
                      </field.FieldLabel>
                      <Input
                        id={field.name}
                        name={field.name}
                        type="password"
                        value={field.state.value}
                        onBlur={field.handleBlur}
                        onChange={(event) =>
                          field.handleChange(event.target.value)
                        }
                        placeholder="Enter your password"
                        disabled={isPending}
                      />
                    </field.Field>
                    <field.FieldError />
                  </field.FieldSet>
                )}
              />

              <Button className="w-full" type="submit" isLoading={isPending}>
                Sign in
              </Button>
            </form.Form>
          </form.AppForm>

          <div className="text-muted-foreground space-y-2 px-8 text-center text-xs">
            <p>
              This starter now uses app-owned authentication with Auth.js and an
              internal organization model.
            </p>
          </div>
        </div>
      </div>
    </div>
  );
}