/**
 * MGT2 Commerce – CommerceDialog
 *
 * Boîte de dialogue principale (FormApplication FoundryVTT).
 * Trois onglets : Passagers / Cargaison / Commerce spéculatif.
 * Les résultats sont postés dans le chat.
 */

import { calculatePassengers, calculateCargo, findAvailableGoods, calculatePrice, formatCredits } from './tradeHelper.js';
import { searchWorlds, fetchWorldDetail, fetchWorldCoordinates, calcParsecs } from './travellerMapApi.js';

const MODULE_ID = 'mgt2-compendium-amiral-denisov';

export class CommerceDialog extends FormApplication {

  constructor(options = {}) {
    super({}, options);
    // Valeurs par défaut du formulaire
    this._formData = {
      pax: {
        uwpDep: '', uwpDest: '', zoneDep: 'normal', zoneDest: 'normal',
        parsecs: 1, skillEffect: 0, stewardLevel: 0,
      },
      cargo: {
        uwpDep: '', uwpDest: '', zoneDep: 'normal', zoneDest: 'normal',
        parsecs: 1, skillEffect: 0, navyRank: 0, scoutRank: 0, socMod: 0, armed: false,
      },
      trade: {
        uwp: '', zone: 'normal', brokerSkill: 0, previousAttempts: 0, blackMarket: false,
      },
    };
    this._tradeGoods = null; // résultats de findAvailableGoods, conservés pour le calcul des prix
  }

  static get defaultOptions() {
    return mergeObject(super.defaultOptions, {
      id:       'mgt2-commerce',
      title:    'Commerce – MGT2',
      template: `modules/${MODULE_ID}/templates/commerce-dialog.hbs`,
      width:    780,
      height:   'auto',
      resizable: true,
      tabs: [{
        navSelector:     '.tabs',
        contentSelector: '.tab-content',
        initial:         'passengers',
      }],
      classes: ['mgt2-commerce-dialog'],
    });
  }

  getData() {
    _registerHandlebarsHelpers();
    return foundry.utils.mergeObject(super.getData(), this._formData);
  }

  activateListeners(html) {
    super.activateListeners(html);

    // Bouton "Calculer les passagers"
    html.find('[data-action="calculate-passengers"]').on('click', async (ev) => {
      ev.preventDefault();
      this._readForm(html);
      await this._handlePassengers();
    });

    // Bouton "Calculer la cargaison"
    html.find('[data-action="calculate-cargo"]').on('click', async (ev) => {
      ev.preventDefault();
      this._readForm(html);
      await this._handleCargo();
    });

    // Bouton "Trouver un fournisseur & marchandises"
    html.find('[data-action="find-goods"]').on('click', async (ev) => {
      ev.preventDefault();
      this._readForm(html);
      await this._handleFindGoods(html);
    });

    // Bouton "Calculer les prix d'achat"
    html.on('click', '[data-action="calculate-buy-prices"]', async (ev) => {
      ev.preventDefault();
      await this._handleBuyPrices();
    });

    // ─── Recherche de monde (Traveller Map API) ───────────────────────────────
    html.find('.world-search-widget').each((_, widget) => {
      const $widget  = $(widget);
      const $input   = $widget.find('.world-search-input');
      const $btn     = $widget.find('.btn-world-search');
      const $results = $widget.find('.world-search-results');
      const uwpTarget    = $widget.data('uwp-target');
      const zoneTarget   = $widget.data('zone-target');
      const parsecsTarget = $widget.data('parsecs-target') || null;
      const role          = $widget.data('role') || null;

      const doSearch = async () => {
        const query = $input.val().trim();
        if (query.length < 2) return;
        $btn.prop('disabled', true).html('<i class="fas fa-spinner fa-spin"></i>');
        $results.empty();
        try {
          const worlds = await searchWorlds(query);
          if (!worlds.length) {
            $results.append('<li class="no-result">Aucun monde trouvé</li>');
          } else {
            worlds.slice(0, 10).forEach(w => {
              const $li = $(`<li data-sector="${w.sector}" data-hex="${w.hex}"><span class="world-name">${w.name}</span> <span class="world-uwp">${w.uwp}</span> <span class="world-sector">${w.sector}</span></li>`);
              $li.on('click', async () => {
                $results.empty();
                $input.val(w.name);
                // Récupère les détails (UWP précis + zone) et les coordonnées en parallèle
                const [detail, coords] = await Promise.all([
                  fetchWorldDetail(w.sector, w.hex).catch(() => null),
                  fetchWorldCoordinates(w.sector, w.hex).catch(() => null),
                ]);

                const resolvedUwp  = detail ? detail.uwp  : w.uwp;
                const resolvedZone = detail ? detail.zone : 'normal';

                html.find(`[name="${uwpTarget}"]`).val(resolvedUwp);
                html.find(`[name="${zoneTarget}"]`).val(resolvedZone);

                // Stocker les coordonnées dans le widget courant
                $widget.data('coords', coords);

                // Synchronisation inter-onglets : départ Passagers → départ Cargaison + monde Commerce
                if (uwpTarget === 'pax.uwpDep') {
                  const $cargoDep = html.find('.world-search-widget[data-uwp-target="cargo.uwpDep"]');
                  $cargoDep.find('.world-search-input').val(w.name);
                  html.find('[name="cargo.uwpDep"]').val(resolvedUwp);
                  html.find('[name="cargo.zoneDep"]').val(resolvedZone);
                  $cargoDep.data('coords', coords);

                  const $tradeWorld = html.find('.world-search-widget[data-uwp-target="trade.uwp"]');
                  $tradeWorld.find('.world-search-input').val(w.name);
                  html.find('[name="trade.uwp"]').val(resolvedUwp);
                  html.find('[name="trade.zone"]').val(resolvedZone);
                }

                // Calculer les parsecs si le widget partenaire a aussi ses coordonnées
                if (parsecsTarget) {
                  const partnerRole = role === 'dep' ? 'dest' : 'dep';
                  const $partner = html.find(
                    `.world-search-widget[data-parsecs-target="${parsecsTarget}"][data-role="${partnerRole}"]`
                  );
                  const partnerCoords = $partner.data('coords');
                  if (coords && partnerCoords) {
                    const dist = calcParsecs(coords, partnerCoords);
                    html.find(`[name="${parsecsTarget}"]`).val(dist);
                  }
                }
              });
              $results.append($li);
            });
          }
        } catch (err) {
          $results.append('<li class="no-result">Erreur de connexion à Traveller Map</li>');
        }
        $btn.prop('disabled', false).html('<i class="fas fa-globe"></i> Chercher');
      };

      $btn.on('click', doSearch);
      $input.on('keydown', (ev) => { if (ev.key === 'Enter') { ev.preventDefault(); doSearch(); } });
    });

    // Fermer les listes de résultats en cliquant ailleurs
    html.on('click', (ev) => {
      if (!$(ev.target).closest('.world-search-widget').length) {
        html.find('.world-search-results').empty();
      }
    });
  }

  // ─── Lecture du formulaire ─────────────────────────────────────────────────

  _readForm(html) {
    // Passagers
    this._formData.pax.uwpDep       = html.find('[name="pax.uwpDep"]').val();
    this._formData.pax.uwpDest      = html.find('[name="pax.uwpDest"]').val();
    this._formData.pax.zoneDep      = html.find('[name="pax.zoneDep"]').val();
    this._formData.pax.zoneDest     = html.find('[name="pax.zoneDest"]').val();
    this._formData.pax.parsecs      = parseInt(html.find('[name="pax.parsecs"]').val()) || 1;
    this._formData.pax.skillEffect  = parseInt(html.find('[name="pax.skillEffect"]').val()) || 0;
    this._formData.pax.stewardLevel = parseInt(html.find('[name="pax.stewardLevel"]').val()) || 0;

    // Cargaison
    this._formData.cargo.uwpDep      = html.find('[name="cargo.uwpDep"]').val();
    this._formData.cargo.uwpDest     = html.find('[name="cargo.uwpDest"]').val();
    this._formData.cargo.zoneDep     = html.find('[name="cargo.zoneDep"]').val();
    this._formData.cargo.zoneDest    = html.find('[name="cargo.zoneDest"]').val();
    this._formData.cargo.parsecs     = parseInt(html.find('[name="cargo.parsecs"]').val()) || 1;
    this._formData.cargo.skillEffect = parseInt(html.find('[name="cargo.skillEffect"]').val()) || 0;
    this._formData.cargo.navyRank    = parseInt(html.find('[name="cargo.navyRank"]').val()) || 0;
    this._formData.cargo.scoutRank   = parseInt(html.find('[name="cargo.scoutRank"]').val()) || 0;
    this._formData.cargo.socMod      = parseInt(html.find('[name="cargo.socMod"]').val()) || 0;
    this._formData.cargo.armed       = html.find('[name="cargo.armed"]').is(':checked');

    // Commerce spéculatif
    this._formData.trade.uwp               = html.find('[name="trade.uwp"]').val();
    this._formData.trade.zone              = html.find('[name="trade.zone"]').val();
    this._formData.trade.brokerSkill       = parseInt(html.find('[name="trade.brokerSkill"]').val()) || 0;
    this._formData.trade.previousAttempts  = parseInt(html.find('[name="trade.previousAttempts"]').val()) || 0;
    this._formData.trade.blackMarket       = html.find('[name="trade.blackMarket"]').is(':checked');
  }

  // ─── Passagers ─────────────────────────────────────────────────────────────

  async _handlePassengers() {
    const p = this._formData.pax;
    if (!p.uwpDep || !p.uwpDest) {
      return ui.notifications.warn('Veuillez saisir les UWP de départ et de destination.');
    }

    const result = await calculatePassengers({
      uwpDep:      p.uwpDep,
      uwpDest:     p.uwpDest,
      zoneDep:     p.zoneDep,
      zoneDest:    p.zoneDest,
      parsecs:     p.parsecs,
      skillEffect: p.skillEffect,
      stewardLevel: p.stewardLevel,
    });

    if (!result.success) {
      return ui.notifications.error(result.errors.join(' | '));
    }

    await this._postToChatResult(result);
  }

  // ─── Cargaison ─────────────────────────────────────────────────────────────

  async _handleCargo() {
    const c = this._formData.cargo;
    if (!c.uwpDep || !c.uwpDest) {
      return ui.notifications.warn('Veuillez saisir les UWP de départ et de destination.');
    }

    const result = await calculateCargo({
      uwpDep:      c.uwpDep,
      uwpDest:     c.uwpDest,
      zoneDep:     c.zoneDep,
      zoneDest:    c.zoneDest,
      parsecs:     c.parsecs,
      skillEffect: c.skillEffect,
      navyRank:    c.navyRank,
      scoutRank:   c.scoutRank,
      socMod:      c.socMod,
      armed:       c.armed,
    });

    if (!result.success) {
      return ui.notifications.error(result.errors.join(' | '));
    }

    // Calcule le sous-total cargaison pour le template
    result.cargoRevenue = result.lots.reduce((s, l) => s + l.revenue, 0);

    await this._postToChatResult(result);
  }

  // ─── Commerce spéculatif – trouver les marchandises ────────────────────────

  async _handleFindGoods(html) {
    const t = this._formData.trade;
    if (!t.uwp) {
      return ui.notifications.warn('Veuillez saisir le code UWP du monde.');
    }

    const result = await findAvailableGoods({
      uwp:              t.uwp,
      zone:             t.zone,
      blackMarket:      t.blackMarket,
      brokerSkill:      t.brokerSkill,
      previousAttempts: t.previousAttempts,
    });

    if (!result.success) {
      return ui.notifications.error(result.errors.join(' | '));
    }

    this._tradeGoods = result;

    // Affiche un aperçu inline dans l'onglet
    const goodsDiv = html.find('.trade-goods-result');
    const listDiv  = html.find('.trade-goods-list');

    if (result.goods.length === 0) {
      listDiv.html('<p><em>Aucune marchandise disponible sur ce monde.</em></p>');
    } else {
      const rows = result.goods.map(g => `
        <div class="trade-good-item">
          <label>
            <input type="checkbox" class="good-select" data-d66="${g.d66}" checked>
            <strong>[${g.d66}] ${g.name}</strong>
            — ${g.tons} t — ${formatCredits(g.basePrice)}/t
            (achat MD ${g.buyMod >= 0 ? '+' : ''}${g.buyMod},
             vente MD ${g.sellMod >= 0 ? '+' : ''}${g.sellMod})
          </label>
        </div>
      `).join('');
      listDiv.html(rows);
    }

    goodsDiv.show();
    await this._postToChatResult(result);
  }

  // ─── Commerce spéculatif – calculer les prix d'achat ───────────────────────

  async _handleBuyPrices() {
    if (!this._tradeGoods || !this._tradeGoods.goods.length) {
      return ui.notifications.warn('Veuillez d\'abord trouver les marchandises disponibles.');
    }

    const brokerSkill = this._formData.trade.brokerSkill;
    const prices = [];

    for (const g of this._tradeGoods.goods) {
      const priceResult = await calculatePrice({
        basePrice:   g.basePrice,
        buyMod:      g.buyMod,
        sellMod:     g.sellMod,
        brokerSkill,
        mode: 'buy',
      });
      prices.push({
        name:        g.name,
        tons:        g.tons,
        basePrice:   g.basePrice,
        diceResult:  priceResult.diceResult,
        modifier:    priceResult.modifier,
        total:       priceResult.total,
        percent:     priceResult.percent,
        actualPrice: priceResult.actualPrice,
        totalCost:   priceResult.actualPrice * g.tons,
      });
    }

    const grandTotal = prices.reduce((s, p) => s + p.totalCost, 0);

    await this._postToChatResult({ type: 'buy-prices', prices, grandTotal });
  }

  // ─── Post en chat ───────────────────────────────────────────────────────────

  async _postToChatResult(data) {
    // Ajoute les helpers Handlebars nécessaires (si pas déjà enregistrés)
    _registerHandlebarsHelpers();

    const html = await renderTemplate(
      `modules/${MODULE_ID}/templates/commerce-result.hbs`,
      data,
    );

    await ChatMessage.create({
      content: html,
      speaker: ChatMessage.getSpeaker(),
      flags:   { [MODULE_ID]: { type: 'commerce-result' } },
    });
  }

  /** Nécessaire pour FormApplication : ne soumet rien (tout est piloté par boutons). */
  async _updateObject(_event, _formData) {}
}

// ─── Helpers Handlebars ───────────────────────────────────────────────────────

let _helpersRegistered = false;

function _registerHandlebarsHelpers() {
  if (_helpersRegistered) return;
  _helpersRegistered = true;

  Handlebars.registerHelper('formatCredits', (amount) => formatCredits(amount));
  Handlebars.registerHelper('join', (arr, sep) => (Array.isArray(arr) ? arr.join(sep) : ''));
  Handlebars.registerHelper('gt',  (a, b) => a > b);
  Handlebars.registerHelper('gte', (a, b) => a >= b);
  Handlebars.registerHelper('eq',  (a, b) => a === b);

  /** Classe CSS selon le signe du modificateur. */
  Handlebars.registerHelper('modClass', (n) => Number(n) > 0 ? 'mod-pos' : Number(n) < 0 ? 'mod-neg' : 'mod-zero');

  /** Génère un <select> numérique de min à max, avec +N pour les positifs. */
  Handlebars.registerHelper('modSelect', function(id, name, value, min, max) {
    let opts = '';
    for (let i = min; i <= max; i++) {
      const label = i > 0 ? `+${i}` : `${i}`;
      const sel   = value === i ? ' selected' : '';
      opts += `<option value="${i}"${sel}>${label}</option>`;
    }
    return new Handlebars.SafeString(`<select id="${id}" name="${name}">${opts}</select>`);
  });
}