const { div, h2, p, section, button, form, a, input, span, pre, table, tr, td } = require("../server/node_modules/hyperaxe");
const { template, i18n } = require("../views/main_views");
const moment = require("../server/node_modules/moment");

const FILTER_LABELS = {
  votes: i18n.typeVotes, vote: i18n.typeVote, recent: i18n.recent, all: i18n.all,
  mine: i18n.mine, tombstone: i18n.typeTombstone, pixelia: i18n.typePixelia,
  curriculum: i18n.typeCurriculum, document: i18n.typeDocument, bookmark: i18n.typeBookmark,
  feed: i18n.typeFeed, event: i18n.typeEvent, task: i18n.typeTask, report: i18n.typeReport,
  image: i18n.typeImage, audio: i18n.typeAudio, video: i18n.typeVideo, post: i18n.typePost,
  forum: i18n.typeForum, about: i18n.typeAbout, contact: i18n.typeContact, pub: i18n.typePub,
  transfer: i18n.typeTransfer, market: i18n.typeMarket, job: i18n.typeJob, tribe: i18n.typeTribe,
  project: i18n.typeProject, banking: i18n.typeBanking, bankWallet: i18n.typeBankWallet, bankClaim: i18n.typeBankClaim,
  aiExchange: i18n.typeAiExchange, parliament: i18n.typeParliament
};

const BASE_FILTERS = ['recent', 'all', 'mine', 'tombstone'];
const CAT_BLOCK1  = ['votes', 'event', 'task', 'report', 'parliament'];
const CAT_BLOCK2  = ['pub', 'tribe', 'about', 'contact', 'curriculum', 'vote', 'aiExchange'];
const CAT_BLOCK3  = ['banking', 'job', 'market', 'project', 'transfer', 'feed', 'post', 'pixelia'];
const CAT_BLOCK4  = ['forum', 'bookmark', 'image', 'video', 'audio', 'document'];

const filterBlocks = (blocks, filter, userId) => {
  if (filter === 'recent') return blocks.filter(b => Date.now() - b.ts < 24*60*60*1000);
  if (filter === 'mine') return blocks.filter(b => b.author === userId);
  if (filter === 'all') return blocks;
  if (filter === 'banking') return blocks.filter(b => b.type === 'bankWallet' || b.type === 'bankClaim');
  if (filter === 'parliament') {
    const pset = new Set(['parliamentTerm','parliamentProposal','parliamentLaw','parliamentCandidature','parliamentRevocation']);
    return blocks.filter(b => pset.has(b.type));
  }
  return blocks.filter(b => b.type === filter);
};

const generateFilterButtons = (filters, currentFilter, action) =>
  div({ class: 'mode-buttons-cols' },
    filters.map(mode =>
      form({ method: 'GET', action },
        input({ type: 'hidden', name: 'filter', value: mode }),
        button({
          type: 'submit',
          class: currentFilter === mode ? 'filter-btn active' : 'filter-btn'
        }, (FILTER_LABELS[mode]||mode).toUpperCase())
      )
    )
  );

const getViewDetailsAction = (type, block) => {
  switch (type) {
    case 'votes': return `/votes/${encodeURIComponent(block.id)}`;
    case 'transfer': return `/transfers/${encodeURIComponent(block.id)}`;
    case 'pixelia': return `/pixelia`;
    case 'tribe': return `/tribe/${encodeURIComponent(block.id)}`;
    case 'curriculum': return `/inhabitant/${encodeURIComponent(block.author)}`;
    case 'image': return `/images/${encodeURIComponent(block.id)}`;
    case 'audio': return `/audios/${encodeURIComponent(block.id)}`;
    case 'video': return `/videos/${encodeURIComponent(block.id)}`;
    case 'forum': return `/forum/${encodeURIComponent(block.content?.key||block.id)}`;
    case 'document': return `/documents/${encodeURIComponent(block.id)}`;
    case 'bookmark': return `/bookmarks/${encodeURIComponent(block.id)}`;
    case 'event': return `/events/${encodeURIComponent(block.id)}`;
    case 'task': return `/tasks/${encodeURIComponent(block.id)}`;
    case 'about': return `/author/${encodeURIComponent(block.author)}`;
    case 'post': return `/thread/${encodeURIComponent(block.id)}#${encodeURIComponent(block.id)}`;
    case 'vote': return `/thread/${encodeURIComponent(block.content.vote.link)}#${encodeURIComponent(block.content.vote.link)}`;
    case 'contact': return `/inhabitants`;
    case 'pub': return `/invites`;
    case 'market': return `/market/${encodeURIComponent(block.id)}`;
    case 'job': return `/jobs/${encodeURIComponent(block.id)}`;
    case 'project': return `/projects/${encodeURIComponent(block.id)}`;
    case 'report': return `/reports/${encodeURIComponent(block.id)}`;
    case 'bankWallet': return `/wallet`;
    case 'bankClaim': return `/banking${block.content?.epochId ? `/epoch/${encodeURIComponent(block.content.epochId)}` : ''}`;
    case 'parliamentTerm': return `/parliament`;
    case 'parliamentProposal': return `/parliament`;
    case 'parliamentLaw': return `/parliament`;
    case 'parliamentCandidature': return `/parliament`;
    case 'parliamentRevocation': return `/parliament`;
    default: return null;
  }
};

const renderSingleBlockView = (block, filter) =>
  template(
    i18n.blockchain,
    section(
      div({ class: 'tags-header' },
        h2(i18n.blockchain),
        p(i18n.blockchainDescription)
      ),
      div({ class: 'mode-buttons-row' },
        div({ style: 'display:flex;flex-direction:column;gap:8px;' },
          generateFilterButtons(BASE_FILTERS, filter, '/blockexplorer')
        ),
        div({ style: 'display:flex;flex-direction:column;gap:8px;' },
          generateFilterButtons(CAT_BLOCK1, filter, '/blockexplorer'),
          generateFilterButtons(CAT_BLOCK2, filter, '/blockexplorer')
        ),
        div({ style: 'display:flex;flex-direction:column;gap:8px;' },
          generateFilterButtons(CAT_BLOCK3, filter, '/blockexplorer'),
          generateFilterButtons(CAT_BLOCK4, filter, '/blockexplorer')
        )
      ),
      div({ class: 'block-single' },
        div({ class: 'block-row block-row--meta' },
          span({ class: 'blockchain-card-label' }, `${i18n.blockchainBlockID}:`),
          span({ class: 'blockchain-card-value' }, block.id)
        ),
        div({ class: 'block-row block-row--meta' },
          span({ class: 'blockchain-card-label' }, `${i18n.blockchainBlockTimestamp}:`),
          span({ class: 'blockchain-card-value' }, moment(block.ts).format('YYYY-MM-DDTHH:mm:ss.SSSZ')),
          span({ class: 'blockchain-card-label' }, `${i18n.blockchainBlockType}:`),
          span({ class: 'blockchain-card-value' }, (FILTER_LABELS[block.type]||block.type).toUpperCase())
        ),
        div({ class: 'block-row block-row--meta', style:'margin-top:8px;' },
          a({ href:`/author/${encodeURIComponent(block.author)}`, class:'block-author user-link' }, block.author)
        )
      ),
      div({ class:'block-row block-row--content' },
        div({ class:'block-content-preview' },
          pre({ class:'json-content' }, JSON.stringify(block.content,null,2))
        )
      ),
      div({ class:'block-row block-row--back' },
        form({ method:'GET', action:'/blockexplorer' },
          button({ type:'submit', class:'filter-btn' }, `← ${i18n.blockchainBack}`)
        ),
        !block.isTombstoned && !block.isReplaced && getViewDetailsAction(block.type, block) ?
          form({ method:'GET', action:getViewDetailsAction(block.type, block) },
            button({ type:'submit', class:'filter-btn' }, i18n.visitContent)
          )
        : (block.isTombstoned || block.isReplaced) ?
          div({ class: 'deleted-label', style: 'color:#b00;font-weight:bold;margin-top:8px;' },
            i18n.blockchainContentDeleted || "This content has been deleted."
          )
        : null
      )
    )
  );

const renderBlockchainView = (blocks, filter, userId) =>
  template(
    i18n.blockchain,
    section(
      div({ class:'tags-header' },
        h2(i18n.blockchain),
        p(i18n.blockchainDescription)
      ),
      div({ class:'mode-buttons-row' },
        div({ style:'display:flex;flex-direction:column;gap:8px;' },
          generateFilterButtons(BASE_FILTERS,filter,'/blockexplorer')
        ),
        div({ style:'display:flex;flex-direction:column;gap:8px;' },
          generateFilterButtons(CAT_BLOCK1,filter,'/blockexplorer'),
          generateFilterButtons(CAT_BLOCK2,filter,'/blockexplorer')
        ),
        div({ style:'display:flex;flex-direction:column;gap:8px;' },
          generateFilterButtons(CAT_BLOCK3,filter,'/blockexplorer'),
          generateFilterButtons(CAT_BLOCK4,filter,'/blockexplorer')
        )
      ),
      filterBlocks(blocks,filter,userId).length===0
        ? div(p(i18n.blockchainNoBlocks))
        : filterBlocks(blocks,filter,userId)
            .sort((a,b)=>{
              const ta = a.type==='market'&&a.content.updatedAt
                ? new Date(a.content.updatedAt).getTime()
                : a.ts;
              const tb = b.type==='market'&&b.content.updatedAt
                ? new Date(b.content.updatedAt).getTime()
                : b.ts;
              return tb - ta;
            })
            .map(block=>
              div({ class:'block' },
                div({ class:'block-buttons' },
                  a({ href:`/blockexplorer/block/${encodeURIComponent(block.id)}`, class:'btn-singleview', title:i18n.blockchainDetails },'⦿'),
                  !block.isTombstoned && !block.isReplaced && getViewDetailsAction(block.type, block) ?
                    form({ method:'GET', action:getViewDetailsAction(block.type, block) },
                      button({ type:'submit', class:'filter-btn' }, i18n.visitContent)
                    )
                  : (block.isTombstoned || block.isReplaced) ?
                    div({ class: 'deleted-label', style: 'color:#b00;font-weight:bold;margin-top:8px;' },
                      i18n.blockchainContentDeleted || "This content has been deleted."
                    )
                  : null
                ),
                div({ class:'block-row block-row--meta' },
                  table({ class:'block-info-table' },
                    tr(td({ class:'card-label' }, i18n.blockchainBlockTimestamp), td({ class:'card-value' }, moment(block.ts).format('YYYY-MM-DDTHH:mm:ss.SSSZ'))),
                    tr(td({ class:'card-label' }, i18n.blockchainBlockID),        td({ class:'card-value' }, block.id)),
                    tr(td({ class:'card-label' }, i18n.blockchainBlockType),      td({ class:'card-value' }, (FILTER_LABELS[block.type]||block.type).toUpperCase())),
                    tr(td({ class:'card-label' }, i18n.blockchainBlockAuthor),    td({ class:'card-value' }, a({ href:`/author/${encodeURIComponent(block.author)}`, class:'block-author user-link' }, block.author)))
                  )
                )
              )
            )
    )
  );

module.exports = { renderBlockchainView, renderSingleBlockView };