// Rôle : rend l'éditeur des caractéristiques d'un équipement avec catégories réordonnables.
import { useState } from "react";
import { Icon } from "../../../components/Icon.jsx";
import { applyGroupedReorderOperation, useGroupedReorder } from "../../../hooks/useGroupedReorder.js";
import { useInlineEdit } from "../../../hooks/useInlineEdit.js";
import {
  TRAIT_ICONS,
  createLocalId,
  formatValue,
  getCharacteristicCategories,
  setItemCategory
} from "./equipmentPlannerOptions.js";
import { IconChoiceDropdown } from "./EquipmentPlannerPickers.jsx";

export function CharacteristicsEditor({ equipment, textContent, editing, onUpdate }) {
  const [draft, setDraft] = useState({ icon: "sword", category: "", name: "", value: "" });
  const categories = getCharacteristicCategories(equipment);
  const {
    itemReorder,
    groupReorder,
    getItemProps,
    getGroupProps,
    isItemDragging,
    isItemDropTarget,
    isGroupDragging,
    isGroupDropTarget,
    getDropPlacement
  } = useGroupedReorder({
    namespace: `equipment-characteristics-${equipment.id}`,
    items: equipment.characteristics,
    getItemId: (trait) => trait.id,
    getItemGroup: (trait) => trait.category,
    getEffectiveGroup: (trait) => trait.category,
    reorderFeatures: {
      item: { groupChange: true },
      group: { reorder: true, itemDrop: true }
    },
    onItemMove: (operation) => onUpdate((current) => applyGroupedReorderOperation(current, {
      operation,
      itemsKey: "characteristics",
      groupOrderKey: "categoryOrder",
      collapsedGroupsKey: "collapsedCategories",
      getItemGroup: (trait) => trait.category,
      setItemGroup: setItemCategory
    })),
    onGroupMove: (operation) => onUpdate((current) => applyGroupedReorderOperation(current, {
      operation,
      itemsKey: "characteristics",
      groupOrderKey: "categoryOrder",
      collapsedGroupsKey: "collapsedCategories",
      getItemGroup: (trait) => trait.category,
      setItemGroup: setItemCategory
    }))
  });
  const reorder = { itemReorder, groupReorder, getItemProps, getGroupProps, isItemDragging, isItemDropTarget, isGroupDragging, isGroupDropTarget, getDropPlacement };

  function addTrait(event) {
    event.preventDefault();
    const cleanName = draft.name.trim();
    if (!cleanName) return;
    onUpdate((current) => ({
      ...current,
      characteristics: [...current.characteristics, { id: createLocalId("trait"), icon: draft.icon, category: draft.category.trim(), name: cleanName, value: draft.value.trim() }],
      categoryOrder: draft.category.trim() && !current.categoryOrder.includes(draft.category.trim()) ? [...current.categoryOrder, draft.category.trim()] : current.categoryOrder
    }));
    setDraft({ icon: draft.icon, category: draft.category, name: "", value: "" });
  }

  function updateTrait(traitId, updater) {
    onUpdate((current) => ({ ...current, characteristics: current.characteristics.map((trait) => trait.id === traitId ? updater(trait) : trait).filter((trait) => trait.name) }));
  }

  return (
    <section className="equipment-planner-panel">
      <h4>{textContent.characteristicsTitle || "Caractéristiques"}</h4>
      {editing && (
        <form className="inline-form equipment-planner-trait-form" onSubmit={addTrait}>
          <IconChoiceDropdown
            label={textContent.traitIconLabel || "Icône"}
            value={draft.icon}
            options={TRAIT_ICONS.map((icon) => ({ icon, label: icon }))}
            onChange={(icon) => setDraft((current) => ({ ...current, icon }))}
          />
          <input value={draft.category} onChange={(event) => setDraft((current) => ({ ...current, category: event.target.value }))} placeholder={textContent.categoryPlaceholder || "Catégorie"} />
          <input value={draft.name} onChange={(event) => setDraft((current) => ({ ...current, name: event.target.value }))} placeholder={textContent.traitNamePlaceholder || "Nom"} />
          <input value={draft.value} onChange={(event) => setDraft((current) => ({ ...current, value: event.target.value }))} placeholder={textContent.traitValuePlaceholder || "Valeur"} />
          <button>{textContent.addTraitButton || "Ajouter"}</button>
        </form>
      )}
      <TraitCategoryList
        traits={equipment.characteristics}
        categories={categories}
        collapsedCategories={equipment.collapsedCategories}
        reorder={reorder}
        textContent={textContent}
        onToggleCategory={(category) => onUpdate((current) => ({
          ...current,
          collapsedCategories: current.collapsedCategories.includes(category)
            ? current.collapsedCategories.filter((item) => item !== category)
            : [...current.collapsedCategories, category]
        }))}
        onUpdateTrait={updateTrait}
        editing={editing}
      />
    </section>
  );
}

function TraitCategoryList({ traits, categories, collapsedCategories, reorder, textContent, onToggleCategory, onUpdateTrait, editing }) {
  const ungrouped = traits.filter((trait) => !trait.category);

  function renderTrait(trait) {
    const traitClassName = [
      "equipment-planner-trait",
      reorder.isItemDragging(trait.id) ? "is-dragging" : "",
      reorder.isItemDropTarget(trait.id) ? "is-drop-target" : "",
      reorder.getDropPlacement("item", trait.id) === "after" ? "drop-after" : ""
    ].filter(Boolean).join(" ");
    return (
      <EquipmentTraitRow
        key={trait.id}
        trait={trait}
        className={traitClassName}
        itemProps={reorder.getItemProps({ itemId: trait.id, groupId: trait.category })}
        editing={editing}
        textContent={textContent}
        onStartDrag={(event) => reorder.itemReorder.startDrag(event, trait.id)}
        onUpdateTrait={onUpdateTrait}
      />
    );
  }

  return (
    <div className="equipment-planner-trait-list">
      {ungrouped.length ? <ul>{ungrouped.map(renderTrait)}</ul> : null}
      {categories.map((category) => {
        const categoryTraits = traits.filter((trait) => trait.category === category);
        const collapsed = collapsedCategories.includes(category);
        const className = [
          "equipment-planner-trait-category",
          collapsed ? "is-collapsed" : "",
          reorder.isGroupDragging(category) ? "is-dragging" : "",
          reorder.isGroupDropTarget(category) ? "is-drop-target" : ""
        ].filter(Boolean).join(" ");
        return (
          <section className={className} key={category} {...reorder.getGroupProps({ groupId: category })}>
            <div className="equipment-planner-trait-category-header">
              <button type="button" className="task-planner-category-drag-handle" onPointerDown={(event) => reorder.groupReorder.startDrag(event, { groupId: category })} title={textContent.reorderCategoryTitle || "Déplacer la catégorie"}>
                <Icon name="drag" />
              </button>
              <strong>{category}</strong>
              <span>{categoryTraits.length}</span>
              <button type="button" className="checklist-section-collapse-button" onClick={() => onToggleCategory(category)} aria-expanded={!collapsed}>
                <Icon name={collapsed ? "chevron-down" : "chevron-up"} />
              </button>
            </div>
            {!collapsed && <ul>{categoryTraits.map(renderTrait)}</ul>}
          </section>
        );
      })}
      {!traits.length && <p className="equipment-planner-muted">{textContent.emptyCharacteristics || "Aucune caractéristique."}</p>}
    </div>
  );
}

function EquipmentTraitRow({ trait, className, itemProps, editing, textContent, onStartDrag, onUpdateTrait }) {
  const categoryEdit = useInlineEdit({
    value: trait.category || "",
    onCommit: (category) => onUpdateTrait(trait.id, (current) => ({ ...current, category }))
  });
  const nameEdit = useInlineEdit({
    value: trait.name,
    transform: (draft) => String(draft || "").trim() || trait.name,
    onCommit: (name) => onUpdateTrait(trait.id, (current) => ({ ...current, name }))
  });
  const valueEdit = useInlineEdit({
    value: formatValue(trait.value),
    onCommit: (value) => onUpdateTrait(trait.id, (current) => ({ ...current, value }))
  });

  return (
    <li className={className} {...itemProps}>
      {editing ? (
        <>
          <button type="button" className="task-planner-drag-handle" onPointerDown={onStartDrag} title={textContent.reorderTraitTitle || "Déplacer"}>
            <Icon name="drag" />
          </button>
          <IconChoiceDropdown
            label={textContent.traitIconLabel || "Icône"}
            value={trait.icon || "sword"}
            options={TRAIT_ICONS.map((icon) => ({ icon, label: icon }))}
            onChange={(icon) => onUpdateTrait(trait.id, (current) => ({ ...current, icon }))}
          />
          <input {...categoryEdit.getInputProps({ placeholder: textContent.categoryPlaceholder || "Catégorie" })} />
          <input {...nameEdit.getInputProps({ placeholder: textContent.traitNamePlaceholder || "Nom" })} />
          <input {...valueEdit.getInputProps({ placeholder: textContent.traitValuePlaceholder || "Valeur" })} />
          <button type="button" className="task-planner-delete-button danger" onClick={() => onUpdateTrait(trait.id, () => ({ ...trait, name: "" }))} title={textContent.deleteTraitTitle || "Supprimer"}>
            <Icon name="trash" />
          </button>
        </>
      ) : (
        <div className="equipment-planner-trait-readonly">
          <Icon name={trait.icon || "sword"} />
          <span>{trait.name}</span>
          {trait.value !== "" && <b>{formatValue(trait.value)}</b>}
        </div>
      )}
    </li>
  );
}