import { HOTBAR_END_SLOT, HOTBAR_START_SLOT, OFF_HAND_SLOT } from '../utils/constants'
import Module from '../utils/Module'
import { ISlot } from '../utils/types'

type Ingredient = ISlot[]

type IRecipe = IRecipeCraftingShapeless | IRecipeCraftingShaped | IRecipeSpecial | IRecipeSmelting | IRecipeStoneCutting
interface IRecipeCraftingShapeless {
    type: 'minecraft:crafting_shapeless'
    recipeId: string
    data: {
        group: string,
        ingredients: Ingredient[],
        result: ISlot,
    }
}
interface IRecipeCraftingShaped {
    type: 'minecraft:crafting_shaped'
    recipeId: string
    data: {
        group: string,
        width: number,
        height: number,
        ingredients: Ingredient[][],
        result: ISlot,
    }
}
interface IRecipeSpecial {
    type: string
    recipeId: string
}
interface IRecipeSmelting {
    type: 'minecraft:smelting' | 'minecraft:blasting' | 'minecraft:smoking' | 'minecraft:campfire_cooking'
    recipeId: string
    data: {
        group: string,
        ingredient: Ingredient,
        result: ISlot,
        experience: number,
        cookTime: number,
    }
}
interface IRecipeStoneCutting {
    type: 'minecraft:stonecutting'
    recipeId: string
    data: {
        group: string,
        ingredient: Ingredient,
        result: ISlot,
    }
}

interface IWindow {
    items?: ISlot[]
    closed?: true
    properties?: number[]
}

const NULL_SLOT: ISlot = { present: false, itemId: -1, itemCount: 0, nbtData: [] }

export default class Inventory extends Module<{}> {

    private _recipes!: IRecipe[]
    public get recipes() {
        return this._recipes
    }

    private _windows = new Map<number, IWindow>()
    public get inventory() {
        return this._windows.get(0)?.items || []
    }
    public get armor() {
        return {
            head: this.inventory[5],
            chest: this.inventory[6],
            legs: this.inventory[7],
            feet: this.inventory[8],
        }
    }
    private get hotbar() {
        return this.inventory.slice(HOTBAR_START_SLOT, HOTBAR_END_SLOT)
    }
    private get offItem() {
        return this.inventory[OFF_HAND_SLOT]
    }

    private _held = 0
    private _onHeld = new Array<(slot: number) => void>()
    public get mainHand() {
        return this._held
    }
    public get mainItem() {
        return this.hotbar[this.mainHand]
    }

    private _actionCounter = 0
    public click(windowId: number, slot: number, mouseButton: number, mode: number, item: ISlot) {
        this.client.write('window_click', { windowId, slot, mouseButton, action: this._actionCounter++, mode, item })
    }
    public toHotbar(to: number, from: number, windowId = 0) {
        const inv = this._windows.get(windowId)?.items
        const item = inv ? inv[from] : NULL_SLOT
        this.click(windowId, from, to, 2, item)
    }
    public drop(from: number, windowId = 0, stack = false) {
        this.click(windowId, from, stack ? 1 : 0, 4, NULL_SLOT)
    }

    public setHeld(slotId: number) {
        this.client.write('held_item_slot', { slotId })
        this._held = slotId
        this._onHeld.forEach(cb => cb(slotId))
    }
    public registerHeld(cb: (slot: number) => void) {
        this._onHeld.push(cb)
    }

    public swapOffItem() {
        this.client.write('block_dig', { status: 6, location: { x: 0, y: 0, z: 0 }, face: 0 })
    }

    public selectItem(slot: number, allowOff: boolean) {
        let hand = -1
        if (slot === OFF_HAND_SLOT && allowOff) {
            hand = 1
        } else {
            let hotSlot = slot
            if (hotSlot < HOTBAR_START_SLOT || hotSlot > HOTBAR_END_SLOT) {
                hotSlot = this.hotbar.findIndex(s => !s.present)
                if (hotSlot < 0) {
                    hotSlot = this.mainHand + 1 % (HOTBAR_END_SLOT - HOTBAR_START_SLOT)
                }
                this.toHotbar(hotSlot, slot)
            } else {
                hotSlot -= HOTBAR_START_SLOT
            }
            if (hotSlot !== this.mainHand || Math.random() > 0.9) { // Force held randomlys
                this.setHeld(hotSlot)
            }
            hand = 0
        }
        return hand
    }
    public useItem(slot: number, allowOff = true) {
        this.client.write('use_item', { hand: this.selectItem(slot, allowOff) })
    }

    public findFirst(order: number[]) {
        return this.inventory.reduce((prev, slot, pos) => {
            const idx = order.indexOf(slot.itemId)
            return idx < 0 || (prev.value > -1 && prev.value <= idx) ? prev : { slot: pos, value: idx }
        }, { slot: -1, value: -1 })
    }

    protected mount(): void {
        this.client.on('declare_recipes', packet => this._recipes = packet.recipes)

        this.client.on('window_items', packet => this.updateWindow(packet.windowId, { items: packet.items}))
        this.client.on('close_window', packet => this.updateWindow(packet.windowId, { closed: true }))
        this.client.on('craft_progress_bar', packet => {
            const window = this._windows.get(packet.windowId) || {}
            if (!window.properties) {
                window.properties = []
            }
            window.properties[packet.property] = packet.value
            this._windows.set(packet.windowId, window)
        })
        this.client.on('transaction', packet => {
            // TODO: action list
            if (!packet.accepted) {
                this.logger.warn('Conflict')
                this.client.write('transaction', packet) // NOTE: may conflict with proxy
            }
        })
        this.client.on('set_slot', packet => {
            const window = this._windows.get(packet.windowId) || {}
            if (!window.items) {
                window.items = []
            }
            window.items[packet.slot] = packet.item
            this._windows.set(packet.windowId, window)
        })
        this.client.on('held_item_slot', packet => this._held = packet.slot)
    }

    protected getConf() {
        return {}
    }

    private updateWindow(windowId: number, data: IWindow) {
        const window = this._windows.get(windowId) || {}
        this._windows.set(windowId, {...window, ...data})
    }

    // TODO: autodrop

}

// MAYBE: horse_window

/* Action */
// TODO: Pick Item
// TODO: craft
// TODO: Log actions
// TODO: Move inventory (equip armor)