const { HandlebarsApplicationMixin } = foundry.applications.api

import { HawkmoonUtility } from "../../hawkmoon-utility.js"
import { HawkmoonAutomation } from "../../hawkmoon-automation.js"

export default class HawkmoonActorSheet extends HandlebarsApplicationMixin(foundry.applications.sheets.ActorSheetV2) {
  /**
   * Different sheet modes.
   * @enum {number}
   */
  static SHEET_MODES = { EDIT: 0, PLAY: 1 }

  constructor(options = {}) {
    super(options)
    this.#dragDrop = this.#createDragDropHandlers()
    this._sheetMode = this.constructor.SHEET_MODES.PLAY // Commencer en mode visualisation
  }

  #dragDrop

  /** @override */
  static DEFAULT_OPTIONS = {
    classes: ["fvtt-hawkmoon-cyd", "sheet", "actor"],
    position: {
      width: 640,
      height: 720,
    },
    window: {
      resizable: true,
    },
    form: {
      submitOnChange: true,
      closeOnSubmit: false,
    },
    dragDrop: [{ dragSelector: ".item-list .item", dropSelector: "form" }],
    actions: {
      editImage: HawkmoonActorSheet.#onEditImage,
      toggleSheet: HawkmoonActorSheet.#onToggleSheet,
      editItem: HawkmoonActorSheet.#onEditItem,
      deleteItem: HawkmoonActorSheet.#onDeleteItem,
      createItem: HawkmoonActorSheet.#onCreateItem,
      equipItem: HawkmoonActorSheet.#onEquipItem,
      modifyQuantity: HawkmoonActorSheet.#onModifyQuantity,
      modifyAdversite: HawkmoonActorSheet.#onModifyAdversite,
      rollInitiative: HawkmoonActorSheet.#onRollInitiative,
      rollAttribut: HawkmoonActorSheet.#onRollAttribut,
      rollCompetence: HawkmoonActorSheet.#onRollCompetence,
      rollArmeOffensif: HawkmoonActorSheet.#onRollArmeOffensif,
      rollArmeDegats: HawkmoonActorSheet.#onRollArmeDegats,
      rollAssommer: HawkmoonActorSheet.#onRollAssommer,
      rollCoupBas: HawkmoonActorSheet.#onRollCoupBas,
      rollImmobiliser: HawkmoonActorSheet.#onRollImmobiliser,
      rollRepousser: HawkmoonActorSheet.#onRollRepousser,
      rollDesengager: HawkmoonActorSheet.#onRollDesengager,
    },
  }

  /**
   * Is the sheet currently in 'Play' mode?
   * @type {boolean}
   */
  get isPlayMode() {
    // Initialize if not set
    if (this._sheetMode === undefined) this._sheetMode = this.constructor.SHEET_MODES.PLAY
    return this._sheetMode === this.constructor.SHEET_MODES.PLAY
  }

  /**
   * Is the sheet currently in 'Edit' mode?
   * @type {boolean}
   */
  get isEditMode() {
    // Initialize if not set
    if (this._sheetMode === undefined) this._sheetMode = this.constructor.SHEET_MODES.PLAY
    return this._sheetMode === this.constructor.SHEET_MODES.EDIT
  }

  /**
   * Tab groups state
   * @type {object}
   */
  tabGroups = { primary: "principal" }

  /** @override */
  async _prepareContext() {
    const actor = this.document

    const context = {
      actor: actor,
      system: actor.system,
      source: actor.toObject(),
      fields: actor.schema.fields,
      systemFields: actor.system.schema.fields,
      isEditable: this.isEditable,
      isEditMode: this.isEditMode,
      isPlayMode: this.isPlayMode,
      isGM: game.user.isGM,
      config: CONFIG.HAWKMOON,
      enrichedDescription: await foundry.applications.ux.TextEditor.implementation.enrichHTML(actor.system.biodata?.description || "", { async: true }),
      enrichedHabitat: await foundry.applications.ux.TextEditor.implementation.enrichHTML(actor.system.biodata?.habitat || "", { async: true }),
    }

    return context
  }

  /** @override */
  _onRender(context, options) {
    super._onRender(context, options)

    // Activate drag & drop handlers
    this.#dragDrop.forEach(d => d.bind(this.element))

    // Manual tab navigation
    const html = this.element
    const tabLinks = html.querySelectorAll('a.item[data-tab]')
    const tabContents = html.querySelectorAll('.tab[data-tab]')

    // Hide all tabs initially
    tabContents.forEach(tab => {
      tab.classList.remove('active')
      tab.style.display = 'none'
    })

    // Show active tab
    const activeTab = this.tabGroups.primary
    const activeTabContent = html.querySelector(`.tab[data-tab="${activeTab}"]`)
    if (activeTabContent) {
      activeTabContent.classList.add('active')
      activeTabContent.style.display = 'block'
    }

    // Activate the corresponding nav link
    tabLinks.forEach(link => {
      if (link.dataset.tab === activeTab) {
        link.classList.add('active')
      } else {
        link.classList.remove('active')
      }
    })

    // Tab click handler
    tabLinks.forEach(link => {
      link.addEventListener('click', (event) => {
        event.preventDefault()
        const tab = link.dataset.tab

        // Update state
        this.tabGroups.primary = tab

        // Hide all tabs
        tabContents.forEach(t => {
          t.classList.remove('active')
          t.style.display = 'none'
        })

        // Show selected tab
        const selectedTab = html.querySelector(`.tab[data-tab="${tab}"]`)
        if (selectedTab) {
          selectedTab.classList.add('active')
          selectedTab.style.display = 'block'
        }

        // Update nav links
        tabLinks.forEach(l => {
          if (l.dataset.tab === tab) {
            l.classList.add('active')
          } else {
            l.classList.remove('active')
          }
        })
      })
    })

    // Inline item editing
    html.querySelectorAll('.edit-item-data').forEach(input => {
      input.addEventListener('change', (event) => {
        const li = event.target.closest('.item')
        const itemId = li.dataset.itemId
        const itemType = li.dataset.itemType
        const itemField = event.target.dataset.itemField
        const dataType = event.target.dataset.dtype
        const value = event.target.value
        this.actor.editItemField(itemId, itemType, itemField, dataType, value)
      })
    })
  }

  // #region Drag & Drop

  /**
   * Create drag-and-drop workflow handlers for this Application
   * @returns {DragDrop[]}     An array of DragDrop handlers
   * @private
   */
  #createDragDropHandlers() {
    return this.options.dragDrop.map((d) => {
      d.permissions = {
        dragstart: this._canDragStart.bind(this),
        drop: this._canDragDrop.bind(this),
      }
      d.callbacks = {
        dragstart: this._onDragStart.bind(this),
        drop: this._onDrop.bind(this),
      }
      return new foundry.applications.ux.DragDrop(d)
    })
  }

  /**
   * Define whether a user is able to begin a dragstart workflow for a given drag selector
   * @param {string} selector       The candidate HTML selector for dragging
   * @returns {boolean}             Can the current user drag this selector?
   * @protected
   */
  _canDragStart(selector) {
    return this.isEditable
  }

  /**
   * Define whether a user is able to conclude a drag-and-drop workflow for a given drop selector
   * @param {string} selector       The candidate HTML selector for the drop target
   * @returns {boolean}             Can the current user drop on this selector?
   * @protected
   */
  _canDragDrop(selector) {
    return this.isEditable
  }

  /**
   * Callback actions which occur at the beginning of a drag start workflow.
   * @param {DragEvent} event       The originating DragEvent
   * @protected
   */
  _onDragStart(event) {
    const li = event.currentTarget.closest(".item")
    if (!li?.dataset.itemId) return
    const item = this.actor.items.get(li.dataset.itemId)
    if (!item) return

    const dragData = item.toDragData()
    event.dataTransfer.setData("text/plain", JSON.stringify(dragData))
  }

  /**
   * Callback actions which occur when a dragged element is dropped on a target.
   * @param {DragEvent} event       The originating DragEvent
   * @protected
   */
  async _onDrop(event) {
    const data = foundry.applications.ux.TextEditor.implementation.getDragEventData(event)
    const actor = this.actor

    // Handle different data types
    switch (data.type) {
      case "Item":
        return this._onDropItem(event, data)
      case "Actor":
        return this._onDropActor(event, data)
      case "ActiveEffect":
        return this._onDropActiveEffect(event, data)
    }
  }

  /**
   * Handle dropping an Item on the actor sheet
   * @param {DragEvent} event
   * @param {object} data
   * @private
   */
  async _onDropItem(event, data) {
    if (!this.actor.isOwner) return false

    let item = await fromUuid(data.uuid)
    if (item.pack) {
      item = await HawkmoonUtility.searchItem(item)
    }

    const autoresult = HawkmoonAutomation.processAutomations("on-drop", item, this.actor)
    if (autoresult.isValid) {
      // In AppV2, we need to get the item data differently
      const itemData = item.toObject ? item.toObject() : item
      return this.actor.createEmbeddedDocuments("Item", [itemData])
    } else {
      ui.notifications.warn(autoresult.warningMessage)
      return false
    }
  }

  /**
   * Handle dropping an Actor on the sheet
   * @param {DragEvent} event
   * @param {object} data
   * @private
   */
  async _onDropActor(event, data) {
    // To be implemented by subclasses if needed
    return false
  }

  /**
   * Handle dropping an ActiveEffect on the sheet
   * @param {DragEvent} event
   * @param {object} data
   * @private
   */
  async _onDropActiveEffect(event, data) {
    // To be implemented by subclasses if needed
    return false
  }

  // #endregion

  // #region Action Handlers

  /**
   * Toggle between edit and play mode
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static #onToggleSheet(event, target) {
    console.log("Toggle sheet clicked", this)
    const wasEditMode = this.isEditMode
    console.log("Current mode:", this._sheetMode, "isEditMode:", wasEditMode, "isPlayMode:", this.isPlayMode)
    this._sheetMode = wasEditMode ? this.constructor.SHEET_MODES.PLAY : this.constructor.SHEET_MODES.EDIT
    console.log("New mode set to:", this._sheetMode, "(", wasEditMode ? "PLAY" : "EDIT", ")")
    console.log("After change - isEditMode:", this.isEditMode, "isPlayMode:", this.isPlayMode)
    this.render({ force: true })
  }

  /**
   * Edit the actor image
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onEditImage(event, target) {
    const fp = new FilePicker({
      type: "image",
      current: this.actor.img,
      callback: (path) => {
        this.actor.update({ img: path })
      },
    })
    return fp.browse()
  }

  /**
   * Edit an item
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onEditItem(event, target) {
    const li = target.closest(".item")
    const itemId = li?.dataset.itemId
    if (!itemId) return
    const item = this.actor.items.get(itemId)
    if (item) item.sheet.render(true)
  }

  /**
   * Delete an item
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onDeleteItem(event, target) {
    const li = target.closest(".item")
    await HawkmoonUtility.confirmDelete(this, li)
  }

  /**
   * Create a new item
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onCreateItem(event, target) {
    const itemType = target.dataset.type
    await this.actor.createEmbeddedDocuments("Item", [{ name: `Nouveau ${itemType}`, type: itemType }], { renderSheet: true })
  }

  /**
   * Equip/unequip an item
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onEquipItem(event, target) {
    const li = target.closest(".item")
    const itemId = li?.dataset.itemId
    if (itemId) {
      await this.actor.equipItem(itemId)
      this.render()
    }
  }

  /**
   * Modify item quantity
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onModifyQuantity(event, target) {
    const li = target.closest(".item")
    const itemId = li?.dataset.itemId
    const value = Number(target.dataset.quantiteValue)
    if (itemId) {
      await this.actor.incDecQuantity(itemId, value)
    }
  }

  /**
   * Modify adversité
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onModifyAdversite(event, target) {
    const li = target.closest(".item")
    const adv = li?.dataset.adversite
    const value = Number(target.dataset.adversiteValue)
    if (adv) {
      await this.actor.incDecAdversite(adv, value)
    }
  }

  /**
   * Roll initiative
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollInitiative(event, target) {
    await this.actor.rollAttribut("adr", true)
  }

  /**
   * Roll attribut
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollAttribut(event, target) {
    const li = target.closest(".item")
    const attrKey = li?.dataset.attrKey
    if (attrKey) {
      await this.actor.rollAttribut(attrKey, false)
    }
  }

  /**
   * Roll competence
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollCompetence(event, target) {
    const li = target.closest(".item")
    const attrKey = target.dataset.attrKey
    const compId = li?.dataset.itemId
    if (attrKey && compId) {
      await this.actor.rollCompetence(attrKey, compId)
    }
  }

  /**
   * Roll arme offensif
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollArmeOffensif(event, target) {
    const li = target.closest(".item")
    const armeId = li?.dataset.itemId
    if (armeId) {
      await this.actor.rollArmeOffensif(armeId)
    }
  }

  /**
   * Roll arme degats
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollArmeDegats(event, target) {
    const li = target.closest(".item")
    const armeId = li?.dataset.itemId
    if (armeId) {
      await this.actor.rollArmeDegats(armeId)
    }
  }

  /**
   * Roll assommer
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollAssommer(event, target) {
    await this.actor.rollAssommer()
  }

  /**
   * Roll coup bas
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollCoupBas(event, target) {
    await this.actor.rollCoupBas()
  }

  /**
   * Roll immobiliser
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollImmobiliser(event, target) {
    await this.actor.rollImmobiliser()
  }

  /**
   * Roll repousser
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollRepousser(event, target) {
    await this.actor.rollRepousser()
  }

  /**
   * Roll désengager
   * @param {Event} event
   * @param {HTMLElement} target
   * @private
   */
  static async #onRollDesengager(event, target) {
    await this.actor.rollDesengager()
  }

  // #endregion
}