# Forgot Password Flow Implementation Plan

> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.

**Goal:** Add self-service password reset so users can recover access via email link without admin help.

**Architecture:** Three UI changes — a link on the login form, a forgot-password page (sends reset email via Supabase), and a reset-password page (sets new password using the recovery session). The existing `/api/auth/callback` route handles the email link's code exchange without modification.

**Tech Stack:** Next.js 15 App Router, Supabase Auth (`@supabase/ssr`), Tailwind CSS

## Global Constraints

- `basePath: '/ims'` — all internal links use paths without `/ims` prefix; Next.js prepends it automatically
- `NEXT_PUBLIC_APP_URL` = `http://64.176.82.100/ims` in production (`.env.production`) — no trailing slash
- Supabase client in client components: `createClient` from `@/lib/supabase/client`
- Styling must match existing login form: `border border-gray-300 rounded-lg px-3 py-2 text-sm focus:ring-2 focus:ring-blue-500`, error in `bg-red-50 border border-red-200 text-red-700 text-sm rounded px-3 py-2`
- Password minimum: 8 characters (matches `change-password-form.tsx`)
- No new API routes — all Supabase calls are client-side

---

### Task 1: Add "Forgot password?" link to login form

**Files:**
- Modify: `components/auth/login-form.tsx`

**Interfaces:**
- Produces: link to `/forgot-password` visible below the Sign in button

- [ ] **Step 1: Add the link**

In `components/auth/login-form.tsx`, add after the `<button type="submit" ...>` closing tag:

```tsx
<p className="text-center text-sm text-gray-500">
  <a href="/forgot-password" className="text-blue-600 hover:underline">
    Forgot password?
  </a>
</p>
```

The full return block bottom should look like:

```tsx
      <button
        type="submit"
        disabled={loading}
        className="bg-blue-600 hover:bg-blue-700 text-white font-medium py-2 rounded-md disabled:opacity-50 transition-colors"
      >
        {loading ? 'Signing in…' : 'Sign in'}
      </button>
      <p className="text-center text-sm text-gray-500">
        <a href="/forgot-password" className="text-blue-600 hover:underline">
          Forgot password?
        </a>
      </p>
    </form>
```

- [ ] **Step 2: Verify visually**

Run `npm run dev` and open `http://localhost:3000/ims/login`. Confirm "Forgot password?" link appears below the Sign in button and clicking it navigates to `/forgot-password` (404 is expected — page doesn't exist yet).

- [ ] **Step 3: Commit**

```bash
git add components/auth/login-form.tsx
git commit -m "feat(auth): add forgot password link to login form"
```

---

### Task 2: Create forgot-password page

**Files:**
- Create: `app/(auth)/forgot-password/page.tsx`

**Interfaces:**
- Consumes: `createClient` from `@/lib/supabase/client`, `NEXT_PUBLIC_APP_URL` env var
- Produces: page at `/forgot-password` that sends a reset email and shows success state

- [ ] **Step 1: Create the page file**

Create `app/(auth)/forgot-password/page.tsx`:

```tsx
'use client'

import { useState } from 'react'
import Link from 'next/link'
import { createClient } from '@/lib/supabase/client'

export default function ForgotPasswordPage() {
  const [email, setEmail] = useState('')
  const [loading, setLoading] = useState(false)
  const [submitted, setSubmitted] = useState(false)
  const [error, setError] = useState<string | null>(null)

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault()
    if (!email) return
    setLoading(true)
    setError(null)

    const supabase = createClient()
    const appUrl = process.env.NEXT_PUBLIC_APP_URL ?? ''
    const redirectTo = `${appUrl}/api/auth/callback?next=/auth/reset-password`

    const { error: resetError } = await supabase.auth.resetPasswordForEmail(email, {
      redirectTo,
    })

    setLoading(false)

    if (resetError) {
      setError('Something went wrong. Please try again.')
      return
    }

    // Always show success — never reveal whether email exists
    setSubmitted(true)
  }

  if (submitted) {
    return (
      <div className="flex min-h-screen items-center justify-center bg-gray-50 px-4">
        <div className="w-full max-w-sm space-y-4 text-center">
          <h1 className="text-2xl font-bold text-gray-900">Check your email</h1>
          <p className="text-sm text-gray-500">
            If an account exists for <strong>{email}</strong>, a password reset link has been sent.
          </p>
          <Link href="/login" className="text-sm text-blue-600 hover:underline">
            Back to sign in
          </Link>
        </div>
      </div>
    )
  }

  return (
    <div className="flex min-h-screen items-center justify-center bg-gray-50 px-4">
      <form onSubmit={handleSubmit} className="flex flex-col gap-4 w-full max-w-sm">
        <div className="text-center">
          <h1 className="text-2xl font-bold">Reset password</h1>
          <p className="text-sm text-gray-500 mt-1">
            Enter your email and we'll send a reset link.
          </p>
        </div>

        {error && (
          <p className="bg-red-50 border border-red-200 text-red-700 text-sm rounded px-3 py-2">
            {error}
          </p>
        )}

        <input
          type="email"
          placeholder="Email"
          value={email}
          onChange={e => setEmail(e.target.value)}
          required
          autoComplete="email"
          className="border border-gray-300 rounded-md px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
        />

        <button
          type="submit"
          disabled={loading}
          className="bg-blue-600 hover:bg-blue-700 text-white font-medium py-2 rounded-md disabled:opacity-50 transition-colors"
        >
          {loading ? 'Sending…' : 'Send reset link'}
        </button>

        <p className="text-center text-sm text-gray-500">
          <Link href="/login" className="text-blue-600 hover:underline">
            Back to sign in
          </Link>
        </p>
      </form>
    </div>
  )
}
```

- [ ] **Step 2: Verify page loads**

With dev server running, open `http://localhost:3000/ims/forgot-password`. Confirm the form renders with email input and "Send reset link" button. Confirm "Back to sign in" navigates to `/ims/login`.

- [ ] **Step 3: Commit**

```bash
git add app/\(auth\)/forgot-password/page.tsx
git commit -m "feat(auth): add forgot password page"
```

---

### Task 3: Create reset-password page

**Files:**
- Create: `app/(auth)/reset-password/page.tsx`

**Interfaces:**
- Consumes: `createClient` from `@/lib/supabase/client`, valid Supabase recovery session in browser cookie
- Produces: page at `/auth/reset-password` that sets a new password and redirects to `/login`

Note: The path is `/auth/reset-password` (not `/reset-password`) because the auth callback `next` param is `/auth/reset-password` which resolves to `app/(auth)/reset-password/page.tsx` — the `(auth)` group folder matches the `/auth/` URL segment? No — route groups like `(auth)` do NOT add a URL segment. So `app/(auth)/reset-password/page.tsx` maps to `/reset-password`.

**Correction:** The callback redirects to `/auth/reset-password` but the page lives at `app/(auth)/reset-password/page.tsx` which maps to `/reset-password`. These must match. Use `/reset-password` as the `next` param in the callback URL (update Task 2's `redirectTo`).

Update `app/(auth)/forgot-password/page.tsx` line:
```tsx
const redirectTo = `${appUrl}/api/auth/callback?next=/reset-password`
```

- [ ] **Step 1: Fix redirectTo in forgot-password page**

In `app/(auth)/forgot-password/page.tsx`, change:
```tsx
const redirectTo = `${appUrl}/api/auth/callback?next=/auth/reset-password`
```
to:
```tsx
const redirectTo = `${appUrl}/api/auth/callback?next=/reset-password`
```

- [ ] **Step 2: Create the reset-password page**

Create `app/(auth)/reset-password/page.tsx`:

```tsx
'use client'

import { useState } from 'react'
import { useRouter } from 'next/navigation'
import Link from 'next/link'
import { createClient } from '@/lib/supabase/client'

export default function ResetPasswordPage() {
  const router = useRouter()
  const [password, setPassword] = useState('')
  const [confirm, setConfirm] = useState('')
  const [loading, setLoading] = useState(false)
  const [error, setError] = useState<string | null>(null)

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault()
    setError(null)

    if (password.length < 8) {
      setError('Password must be at least 8 characters.')
      return
    }
    if (password !== confirm) {
      setError('Passwords do not match.')
      return
    }

    setLoading(true)
    const supabase = createClient()
    const { error: updateError } = await supabase.auth.updateUser({ password })
    setLoading(false)

    if (updateError) {
      if (updateError.message.toLowerCase().includes('session') ||
          updateError.message.toLowerCase().includes('expired')) {
        setError('Reset link has expired. Request a new one.')
      } else {
        setError(updateError.message)
      }
      return
    }

    router.push('/login?message=password_reset')
  }

  return (
    <div className="flex min-h-screen items-center justify-center bg-gray-50 px-4">
      <form onSubmit={handleSubmit} className="flex flex-col gap-4 w-full max-w-sm">
        <div className="text-center">
          <h1 className="text-2xl font-bold">Set new password</h1>
          <p className="text-sm text-gray-500 mt-1">Choose a strong password.</p>
        </div>

        {error && (
          <p className="bg-red-50 border border-red-200 text-red-700 text-sm rounded px-3 py-2">
            {error}{' '}
            {error.includes('expired') && (
              <Link href="/forgot-password" className="underline">
                Request new link
              </Link>
            )}
          </p>
        )}

        <input
          type="password"
          placeholder="New password"
          value={password}
          onChange={e => setPassword(e.target.value)}
          required
          minLength={8}
          autoComplete="new-password"
          className="border border-gray-300 rounded-md px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
        />
        <input
          type="password"
          placeholder="Confirm new password"
          value={confirm}
          onChange={e => setConfirm(e.target.value)}
          required
          autoComplete="new-password"
          className="border border-gray-300 rounded-md px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
        />

        <button
          type="submit"
          disabled={loading}
          className="bg-blue-600 hover:bg-blue-700 text-white font-medium py-2 rounded-md disabled:opacity-50 transition-colors"
        >
          {loading ? 'Saving…' : 'Set password'}
        </button>
      </form>
    </div>
  )
}
```

- [ ] **Step 3: Show success message on login page when redirected from reset**

In `app/(auth)/login/page.tsx` (or wherever the login page renders), check for `?message=password_reset` and show a banner. Check what the login page currently looks like first:

```bash
cat app/\(auth\)/login/page.tsx
```

If it just renders `<LoginForm />`, update it to a server component that reads the search param and passes a success message:

```tsx
import { LoginForm } from '@/components/auth/login-form'

interface Props {
  searchParams: Promise<{ message?: string }>
}

export default async function LoginPage({ searchParams }: Props) {
  const { message } = await searchParams
  return (
    <div className="flex min-h-screen items-center justify-center bg-gray-50 px-4">
      {message === 'password_reset' && (
        <div className="fixed top-4 left-1/2 -translate-x-1/2 bg-green-50 border border-green-200 text-green-700 text-sm rounded px-4 py-2 shadow">
          Password updated — sign in with your new password.
        </div>
      )}
      <LoginForm />
    </div>
  )
}
```

If the login page already has a wrapping layout, add the banner inside the existing structure instead.

- [ ] **Step 4: Verify reset-password page loads**

Open `http://localhost:3000/ims/reset-password`. Confirm the two password inputs and "Set password" button render. Without a recovery session, the Supabase call will fail — the error message should show.

- [ ] **Step 5: Commit**

```bash
git add app/\(auth\)/forgot-password/page.tsx app/\(auth\)/reset-password/page.tsx app/\(auth\)/login/page.tsx
git commit -m "feat(auth): add reset-password page and login success banner"
```

---

### Task 4: Verify Supabase redirect URL and deploy

**Files:** None — configuration + deploy

- [ ] **Step 1: Check Supabase redirect URL allowlist**

Go to [https://supabase.com](https://supabase.com) → project `nkcfjbgappslicotwopl` → Authentication → URL Configuration → Redirect URLs.

Ensure this URL is listed:
```
http://64.176.82.100/ims/api/auth/callback
```

If missing, click "Add URL" and add it. Without this, Supabase will reject the reset email's redirect as unauthorised.

- [ ] **Step 2: Deploy to VPS**

```bash
bash deploy.sh
```

Expected output ends with:
```
==> Done. http://64.176.82.100/ims/
```

- [ ] **Step 3: End-to-end test on production**

1. Go to `http://64.176.82.100/ims/login` — confirm "Forgot password?" link visible
2. Click it → confirm redirects to `http://64.176.82.100/ims/forgot-password`
3. Enter a real user's email → click "Send reset link"
4. Confirm success screen: "Check your email"
5. Open email → click the reset link
6. Confirm landing on `http://64.176.82.100/ims/reset-password`
7. Enter a new password (≥8 chars) + confirm → click "Set password"
8. Confirm redirect to `/login` with green success banner
9. Sign in with the new password — confirm it works