import * as React from 'react'

import type { Action, ActionHash } from '@lastres/action'
import type { TalkNPCs, TalkNPC } from '@lastres/talk-npc'

import OutputPacketExecuteAction from '@lastres/output-packet/execute_action'
import OutputPacketTalk from '@lastres/output-packet/talk';

import PresentationItem from '@lastres/components/presentation-item'
import Presentation from '@lastres/components/presentation'

export interface BottomPanelProps {
    websocket: WebSocket | null
    actionHash: ActionHash | null
    talkNPCs: TalkNPCs | null
}

export interface Style {
    background?: string
}

export default function BottomPanel (props: BottomPanelProps): JSX.Element {
    const actionHash = props.actionHash
    function printListActions(): JSX.Element {
        if (actionHash === null) {
            return <></>
        }
        const listOfActionKeys = Object.keys(actionHash).sort((a, b) => {
            const isDisabledComparisionValue: number = +actionHash[a].is_disabled - +actionHash[b].is_disabled
            if (isDisabledComparisionValue !== 0) {
                return isDisabledComparisionValue
            }
            if (actionHash[a].name < actionHash[b].name) {
                return -1
            }
            if (actionHash[a].name > actionHash[b].name) {
                return 1
            }
            return 0
        })
        function printDisabledReason (action: Action): JSX.Element {
            if (!action.is_disabled || action.disabled_reason === null) {
                return <></>
            }
            return (
                <p className="disabled-reason" style={{ color: 'red' }}>{action.disabled_reason}</p>
            )
        }
        return <>
            <p>Acciones disponibles.</p>
            {
                listOfActionKeys.map((key) => {
                    const style: Style = {}
                    const action = actionHash[key]
                    if (action.is_disabled) {
                        style.background = 'lightgray'
                    }
                    function onClick (): void {
                        if (action.is_disabled) {
                            return
                        }
                        if (props.websocket !== null) {
                            new OutputPacketExecuteAction(action.identifier)
                                .send(props.websocket)
                        }
                    }
                    return <a onClick={onClick} className="action" style={style} key={action.identifier}>
                        <p>{action.name}</p>
                        {
                            printDisabledReason(action)
                        }
                    </a>
                })
            }
        </>
    }
    function printAvatar (npc: TalkNPC): JSX.Element {
        if (npc.icon === undefined) {
            return <></>
        }
        return <div className="avatar">
            <img src={npc.icon}/><div className="shadow"/>
        </div>
    }

    function onWordlesslyTalk (npc: TalkNPC): void {
        if (props.websocket === null) {
            return
        }
        new OutputPacketTalk(npc.identifier).send(props.websocket)
    }
    function printTalkNpcs (): JSX.Element {
        const npcs = props.talkNPCs
        if (npcs === null) {
            return <></>
        }
        if (Object.keys(npcs).length < 1) {
            return <>
                <p>No hay nadie para hablar ahora.</p>
            </>
        }
        return (
            <>
                <p>Disponible para hablar:</p>
                {
                    Object.keys(npcs).map((identifier) => {
                        const npc = npcs[identifier]
                        return <div key={npc.identifier} className="talk-npc">
                            <div className="detail">
                                <div className="name-container">
                                    {
                                        printAvatar(npc)
                                    }
                                    <div className="name">
                                        <p>{npc.name}</p>
                                    </div>
                                </div>
                                <div className="buttons">
                                    <button onClick={() => {
                                        onWordlesslyTalk(npc)
                                    }}>Hablar</button>
                                    <button>Decir palabra</button>
                                </div>
                            </div>
                        </div>
                    })
                }
            </>
        )
    }
    return (
        <Presentation>
            <PresentationItem>
                {
                    printListActions()
                }
            </PresentationItem>
            <PresentationItem>
                {
                    printTalkNpcs()
                }
            </PresentationItem>
            <PresentationItem>
            </PresentationItem>
        </Presentation>
    )
}