import { For } from "solid-js";
import type { JSX } from "solid-js";
import { cn } from "~/lib/utils";
import PageContainer from "~/components/layout/PageContainer";

interface Step {
  number: number;
  title: string;
  description: string;
  icon: () => JSX.Element;
}

function EnrollIcon() {
  return (
    <svg
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      xmlns="http://www.w3.org/2000/svg"
      class="w-8 h-8 text-white"
    >
      <path
        d="M12 4a4 4 0 100 8 4 4 0 000-8zM6 21v-2a4 4 0 014-4h4a4 4 0 014 4v2"
        stroke="currentColor"
        stroke-width="1.5"
        stroke-linecap="round"
      />
      <path
        d="M17 8l2 2 4-4"
        stroke="currentColor"
        stroke-width="1.5"
        stroke-linecap="round"
        stroke-linejoin="round"
      />
    </svg>
  );
}

function MonitorIcon() {
  return (
    <svg
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      xmlns="http://www.w3.org/2000/svg"
      class="w-8 h-8 text-white"
    >
      <path
        d="M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
        stroke="currentColor"
        stroke-width="1.5"
      />
      <path
        d="M12 8v4l3 3"
        stroke="currentColor"
        stroke-width="1.5"
        stroke-linecap="round"
        stroke-linejoin="round"
      />
      <path
        d="M3 12h3m15 0h3M12 3v3m0 15v3"
        stroke="currentColor"
        stroke-width="1.5"
        stroke-linecap="round"
        opacity="0.5"
      />
    </svg>
  );
}

function AlertIcon() {
  return (
    <svg
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      xmlns="http://www.w3.org/2000/svg"
      class="w-8 h-8 text-white"
    >
      <path
        d="M18 8A6 6 0 006 8c0 7-3 9-3 9h18s-3-2-3-9"
        stroke="currentColor"
        stroke-width="1.5"
        stroke-linecap="round"
        stroke-linejoin="round"
      />
      <path
        d="M12 22a2 2 0 01-2-2h4a2 2 0 01-2 2z"
        fill="currentColor"
      />
      <path
        d="M12 11v3m0-6v1"
        stroke="currentColor"
        stroke-width="1.5"
        stroke-linecap="round"
      />
    </svg>
  );
}

const steps: Step[] = [
  {
    number: 1,
    title: "Enroll Your Identity",
    description:
      "Sign up and add your emails, phone numbers, and family members to create your protection profile.",
    icon: EnrollIcon,
  },
  {
    number: 2,
    title: "We Monitor 24/7",
    description:
      "Our system runs continuous dark web scans, voiceprint detection, and spam filtering to catch threats early.",
    icon: MonitorIcon,
  },
  {
    number: 3,
    title: "Get Instant Alerts",
    description:
      "Receive real-time notifications the moment a threat is detected, with clear guidance on what to do next.",
    icon: AlertIcon,
  },
];

interface StepBlockProps {
  step: Step;
  index: number;
}

function StepBlock(props: StepBlockProps) {
  const isEven = props.index % 2 === 0;
  const Icon = props.step.icon;

  return (
    <div
      class={cn(
        "flex gap-8 md:flex-row flex-col",
        isEven ? "" : "md:flex-row-reverse",
      )}
    >
      <div class="flex-1">
        <div class="flex items-start gap-5">
          <div class="w-14 h-14 rounded-full gradient-primary shadow-glow-primary flex items-center justify-center shrink-0">
            <Icon />
          </div>
          <div>
            <div class="inline-flex items-center gap-2 mb-1.5">
              <span class="text-sm font-semibold text-[var(--color-brand-primary)]">
                Step {props.step.number}
              </span>
            </div>
            <h3 class="text-xl md:text-2xl font-bold text-[var(--color-text-primary)] mb-2">
              {props.step.title}
            </h3>
            <p class="text-base text-[var(--color-text-secondary)] leading-relaxed">
              {props.step.description}
            </p>
          </div>
        </div>
      </div>
      <div class="flex-1 hidden md:block" />
    </div>
  );
}

interface HowItWorksSectionProps {
  class?: string;
}

export default function HowItWorksSection(props: HowItWorksSectionProps) {
  return (
    <section
      id="how-it-works"
      class={cn("py-20 md:py-28 scroll-mt-16", props.class)}
    >
      <PageContainer py="py-8">
        <div class="text-center mb-16">
          <h2 class="text-3xl md:text-4xl lg:text-5xl font-bold text-[var(--color-text-primary)] mb-4">
            How It Works
          </h2>
          <p class="text-lg text-[var(--color-text-secondary)] max-w-2xl mx-auto">
            Three simple steps to full identity protection
          </p>
        </div>

        <div class="flex flex-col gap-12 md:gap-16">
          <For each={steps}>
            {(step, index) => <StepBlock step={step} index={index()} />}
          </For>
        </div>
      </PageContainer>
    </section>
  );
}