"use client";

import { useState } from "react";
import { useMutation } from "@tanstack/react-query";
import { useAuth } from "@/contexts/AuthContext";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/Card";
import { Button } from "@/components/ui/Button";
import { Input } from "@/components/ui/Input";
import { User, Lock } from "lucide-react";
import api from "@/lib/api";
import { toast } from "sonner";

export default function ProfilePage() {
  const { user } = useAuth();

  const [infoForm, setInfoForm] = useState({
    firstName: (user as any)?.firstName ?? user?.name?.split(" ")[0] ?? "",
    lastName: (user as any)?.lastName ?? user?.name?.split(" ").slice(1).join(" ") ?? "",
    email: user?.email ?? "",
  });

  const [pwForm, setPwForm] = useState({
    currentPassword: "",
    newPassword: "",
    confirmPassword: "",
  });

  const updateInfo = useMutation({
    mutationFn: async () => {
      await api.patch("/api/v1/auth/me", {
        firstName: infoForm.firstName,
        lastName: infoForm.lastName,
        email: infoForm.email,
      });
    },
    onSuccess: () => toast.success("Profile updated!"),
    onError: (e: any) => toast.error(e.response?.data?.message ?? "Failed to update profile"),
  });

  const resetPassword = useMutation({
    mutationFn: async () => {
      if (pwForm.newPassword !== pwForm.confirmPassword) {
        throw new Error("Passwords do not match");
      }
      await api.post("/api/v1/auth/change-password", {
        currentPassword: pwForm.currentPassword,
        newPassword: pwForm.newPassword,
      });
    },
    onSuccess: () => {
      toast.success("Password changed successfully!");
      setPwForm({ currentPassword: "", newPassword: "", confirmPassword: "" });
    },
    onError: (e: any) => toast.error(e.response?.data?.message ?? e.message ?? "Failed to change password"),
  });

  return (
    <div className="space-y-6 max-w-xl">
      <div>
        <h1 className="text-2xl font-bold text-gray-900">My Profile</h1>
        <p className="text-sm text-gray-500 mt-1">Manage your account settings</p>
      </div>

      {/* Profile Info */}
      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <User className="h-4 w-4 text-blue-600" />
            Personal Information
          </CardTitle>
        </CardHeader>
        <CardContent className="space-y-4">
          <div className="grid grid-cols-2 gap-3">
            <Input
              label="First Name"
              value={infoForm.firstName}
              onChange={e => setInfoForm(f => ({ ...f, firstName: e.target.value }))}
            />
            <Input
              label="Last Name"
              value={infoForm.lastName}
              onChange={e => setInfoForm(f => ({ ...f, lastName: e.target.value }))}
            />
          </div>
          <Input
            label="Email"
            type="email"
            value={infoForm.email}
            onChange={e => setInfoForm(f => ({ ...f, email: e.target.value }))}
          />
          <div className="flex justify-end">
            <Button
              onClick={() => updateInfo.mutate()}
              isLoading={updateInfo.isPending}
              disabled={!infoForm.firstName || !infoForm.email}
            >
              Save Changes
            </Button>
          </div>
        </CardContent>
      </Card>

      {/* Change Password */}
      <Card>
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <Lock className="h-4 w-4 text-blue-600" />
            Change Password
          </CardTitle>
        </CardHeader>
        <CardContent className="space-y-4">
          <Input
            label="Current Password"
            type="password"
            value={pwForm.currentPassword}
            onChange={e => setPwForm(f => ({ ...f, currentPassword: e.target.value }))}
          />
          <Input
            label="New Password"
            type="password"
            value={pwForm.newPassword}
            onChange={e => setPwForm(f => ({ ...f, newPassword: e.target.value }))}
            hint="Minimum 8 characters"
          />
          <Input
            label="Confirm New Password"
            type="password"
            value={pwForm.confirmPassword}
            onChange={e => setPwForm(f => ({ ...f, confirmPassword: e.target.value }))}
          />
          {pwForm.newPassword && pwForm.confirmPassword && pwForm.newPassword !== pwForm.confirmPassword && (
            <p className="text-xs text-red-500">Passwords do not match</p>
          )}
          <div className="flex justify-end">
            <Button
              onClick={() => resetPassword.mutate()}
              isLoading={resetPassword.isPending}
              disabled={!pwForm.currentPassword || !pwForm.newPassword || !pwForm.confirmPassword || pwForm.newPassword !== pwForm.confirmPassword}
            >
              Change Password
            </Button>
          </div>
        </CardContent>
      </Card>
    </div>
  );
}