'use client'

import { useState, useEffect } from 'react'
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
import { Button } from '@/components/ui/button'
import { Input } from '@/components/ui/input'
import { Label } from '@/components/ui/label'
import { User, Save, Loader2 } from 'lucide-react'

export default function SettingsPage() {
  const [fullName, setFullName] = useState('')
  const [company, setCompany] = useState('')
  const [email, setEmail] = useState('')
  const [role, setRole] = useState('')
  const [isLoading, setIsLoading] = useState(true)
  const [isSaving, setIsSaving] = useState(false)
  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null)

  useEffect(() => {
    fetch('/api/profile')
      .then((r) => r.json())
      .then((data) => {
        if (data.user) {
          setFullName(data.user.fullName || '')
          setCompany(data.user.company || '')
          setEmail(data.user.email || '')
          setRole(data.user.role || 'user')
        }
      })
      .finally(() => setIsLoading(false))
  }, [])

  const handleSave = async (e: React.FormEvent) => {
    e.preventDefault()
    setIsSaving(true)
    setMessage(null)

    const res = await fetch('/api/profile', {
      method: 'PATCH',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ fullName, company }),
    })

    const data = await res.json()
    if (res.ok) {
      setMessage({ type: 'success', text: 'Profile updated successfully' })
    } else {
      setMessage({ type: 'error', text: data.error || 'Failed to save' })
    }
    setIsSaving(false)
  }

  if (isLoading) {
    return (
      <div className="flex items-center justify-center py-12">
        <Loader2 className="h-8 w-8 animate-spin text-muted-foreground" />
      </div>
    )
  }

  return (
    <div className="space-y-6 max-w-2xl">
      <div>
        <h2 className="text-2xl font-bold">Settings</h2>
        <p className="text-muted-foreground">Manage your account settings and preferences</p>
      </div>

      <Card className="border-border/50">
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <User className="h-5 w-5" />
            Profile
          </CardTitle>
          <CardDescription>Update your personal information</CardDescription>
        </CardHeader>
        <CardContent>
          <form onSubmit={handleSave} className="space-y-4">
            <div className="grid gap-2">
              <Label htmlFor="fullName">Full name</Label>
              <Input
                id="fullName"
                value={fullName}
                onChange={(e) => setFullName(e.target.value)}
                placeholder="John Doe"
                className="bg-secondary/50"
              />
            </div>
            <div className="grid gap-2">
              <Label htmlFor="company">Company</Label>
              <Input
                id="company"
                value={company}
                onChange={(e) => setCompany(e.target.value)}
                placeholder="Acme Inc."
                className="bg-secondary/50"
              />
            </div>

            {message && (
              <div className={`rounded-md p-3 text-sm ${message.type === 'success' ? 'bg-green-500/10 text-green-500 border border-green-500/20' : 'bg-destructive/10 text-destructive border border-destructive/20'}`}>
                {message.text}
              </div>
            )}

            <Button type="submit" disabled={isSaving}>
              {isSaving ? (
                <><Loader2 className="mr-2 h-4 w-4 animate-spin" />Saving...</>
              ) : (
                <><Save className="mr-2 h-4 w-4" />Save changes</>
              )}
            </Button>
          </form>
        </CardContent>
      </Card>

      <Card className="border-border/50">
        <CardHeader>
          <CardTitle>Account</CardTitle>
          <CardDescription>Your account details</CardDescription>
        </CardHeader>
        <CardContent className="space-y-4">
          <div className="flex items-center justify-between p-3 rounded-lg bg-muted/30">
            <div>
              <p className="font-medium">Email</p>
              <p className="text-sm text-muted-foreground">{email}</p>
            </div>
          </div>
          <div className="flex items-center justify-between p-3 rounded-lg bg-muted/30">
            <div>
              <p className="font-medium">Role</p>
              <p className="text-sm text-muted-foreground capitalize">{role}</p>
            </div>
          </div>
        </CardContent>
      </Card>
    </div>
  )
}