"use client"

import type React from "react"
import { useEffect, useState } from "react"
import Link from "next/link"
import { X } from "lucide-react"
import { PcTemplateModal } from "@/components/ChatInputBox/PcTemplateModal"
import { useTemplateStoryServiceHook } from "@/app/service/Interaction/templateStoryService"

/**
 * A compact template showcase with a header and link to all templates.
 * Shows first 12 templates, in 3 columns, each with thumbnail, name and brief.
 * @returns {JSX.Element} - FamousTemplate component
 */
const FamousTemplate: React.FC = () => {
  const { templateStoryList, getTemplateStoryList, isLoading } = useTemplateStoryServiceHook()

  const [isModalOpen, setIsModalOpen] = useState(false)
  const [initialTemplateId, setInitialTemplateId] = useState<string | undefined>(undefined)
  const [isTemplateCreating, setIsTemplateCreating] = useState(false)
  const [isRoleGenerating, setIsRoleGenerating] = useState<{ [key: string]: boolean }>({})
  const [isItemGenerating, setIsItemGenerating] = useState<{ [key: string]: boolean }>({})
  const [activeTemplateId, setActiveTemplateId] = useState<string | null>(null)
  const [isPreviewReady, setIsPreviewReady] = useState(false)

  useEffect(() => {
    void getTemplateStoryList()
  }, [getTemplateStoryList])

  const topTemplates = templateStoryList.slice(0, 10)

  return (
    <section data-alt="famous-template" className="w-full">
      <div data-alt="famous-template-header" className="mb-4 flex items-center justify-between">
        <h2 data-alt="famous-template-title" className="text-xl py-4 font-semibold text-white">
          Make Movie
        </h2>
      </div>

      {isLoading ? (
        <div data-alt="loading" className="text-sm text-white/70">
          Loading...
        </div>
      ) : (
        <div data-alt="template-grid" className="grid grid-cols-2 sm:grid-cols-4 md:grid-cols-5 gap-8">
          {topTemplates.map((t) => {

            return (
              <div data-alt="template-item" key={t.id} className="relative h-40 group">
                <div
                  data-alt="template-item-placeholder"
                  className="flex items-center gap-3 rounded-lg border border-white/10 bg-white/0 h-full transition-transform duration-300 ease-out group-hover:scale-105"
                >
                  <div
                    data-alt="template-thumb"
                    className="w-full h-full rounded-md overflow-hidden border border-white/10 flex-shrink-0"
                  >
                    <img
                      src={t.image_url?.[0] || ""}
                      alt={t.name}
                      className="w-full h-full object-cover object-center"
                    />

                    <div data-alt="template-meta" className="flex-1 min-w-0 absolute bg-black/50 bottom-0 left-0 right-0 px-3 py-3">
                      <div data-alt="template-name" className="text-base font-bold text-white truncate">{t.name}</div>
                    </div>
                  </div>
                </div>

                <div
                  data-alt="template-item-click-layer"
                  className="absolute inset-0 cursor-pointer"
                  onClick={() => {
                    const id = t.id || t.template_id
                    if (t.show_url) {
                      if (activeTemplateId === id) {
                        setActiveTemplateId(null)
                      } else {
                        setIsPreviewReady(false)
                        setActiveTemplateId(id)
                      }
                    } else {
                      setInitialTemplateId(id)
                      setIsModalOpen(true)
                    }
                  }}
                />
              </div>
            )
          })}
        </div>
      )}

      {/* Centered modal for active template preview */}
      {activeTemplateId && (() => {
        const active = topTemplates.find((x) => (x.id || x.template_id) === activeTemplateId)
        if (!active || !active.show_url) return null
        return (
        <div
          data-alt="template-preview-modal"
          className="fixed inset-0 z-50 bg-black/80 flex items-center justify-center p-4"
          onClick={() => setActiveTemplateId(null)}
        >
          <div
            data-alt="template-preview-modal-content"
            className="relative w-[80vw] min-h-[40vw] rounded-lg overflow-hidden border border-white/30 bg-black shadow-2xl"
            onClick={(e) => e.stopPropagation()}
          >
            <>
              <video
                src={active.show_url}
                autoPlay
                loop
                muted
                playsInline
                onCanPlay={() => setIsPreviewReady(true)}
                className={`w-full h-auto transition-opacity duration-200 ${isPreviewReady ? "opacity-100" : "opacity-0"}`}
              />
              {!isPreviewReady && (
                <div
                  data-alt="template-preview-loading"
                  className="absolute inset-0 flex items-center justify-center"
                >
                  <div className="h-10 w-10 rounded-full border-2 border-white/30 border-t-white/80 animate-spin" />
                </div>
              )}
              {/* template-preview-header */}
              {isPreviewReady && (
                <div
                  data-alt="template-preview-header"
                  className="absolute top-0 left-0 right-0 bg-gradient-to-b from-black/90 via-black/80 to-transparent px-6 py-8 text-center"
                >
                  <div className="text-bold text-2xl text-white/90 line-clamp-2 text-left mb-4">
                    {active.name}
                  </div>
                </div>
              )}
              {isPreviewReady && (
                <div
                  data-alt="template-preview-footer"
                  className="absolute bottom-0 left-0 right-0 bg-gradient-to-t from-black/90 via-black/80 to-transparent px-6 py-8 text-center"
                >
                  <div className="text-base text-white/90 line-clamp-2 text-left mb-4">
                    {active.generateText || active.name}
                  </div>
                  <button
                    type="button"
                    className="items-center text-bold justify-center rounded-full border border-white/30 bg-white/10 px-6 py-2 text-sm text-xl text-white transition hover:border-white hover:bg-white hover:text-slate-900"
                    onClick={() => {
                      setInitialTemplateId(active.id || active.template_id)
                      setIsModalOpen(true)
                      setActiveTemplateId(null)
                    }}
                    data-alt="template-preview-try-it"
                  >
                    Try it Free
                  </button>
                </div>
              )}
              <button
                type="button"
                data-alt="template-preview-modal-close"
                className="absolute top-3 right-3 inline-flex items-center justify-center rounded-full border border-white/30 bg-white/10 p-2 text-white hover:border-white hover:bg-white hover:text-slate-900"
                onClick={() => setActiveTemplateId(null)}
              >
                <X className="h-4 w-4" />
              </button>
            </>
          </div>
        </div>
        )
      })()}

      <PcTemplateModal
        isTemplateCreating={isTemplateCreating}
        setIsTemplateCreating={setIsTemplateCreating}
        isRoleGenerating={isRoleGenerating}
        setIsRoleGenerating={setIsRoleGenerating}
        isItemGenerating={isItemGenerating}
        setIsItemGenerating={setIsItemGenerating}
        isOpen={isModalOpen}
        onClose={() => setIsModalOpen(false)}
        initialTemplateId={initialTemplateId}
        configOptions={{ mode: "auto", resolution: "720p", language: "english", videoDuration: "auto" }}
      />
    </section>
  )
}

export default FamousTemplate