const v = require('vec3')
let mcData

let cfg = {}
let bot = {}
// bot.chatAddPattern(new RegExp(`^hi|hello ${bot.username}`, "i"), 'greet', "General greeting")

function todo() {
    cfg.quiet && console.warn("not implemented") || bot.chat("not implemented yet")
}

function checkBlockExists(name) {
    if (mcData.blocksByName[name] === undefined) {
        bot.chat(`${name} is not a block name`)
        return false
    } else {
        return true
    }
}
function checkItemExists(name) {
    if (mcData.itemsByName[name] === undefined) {
        bot.chat(`${name} is not an item name`)
        return false
    } else {
        return true
    }
}

const events = {
    whisper: function command_whisper(username, _botusername, message, ...history) {
        if ([bot.username, "me"].includes(username)) return // whisper back from server (afk msges, etc)
        if (/^gossip/.test(message)) return
        if (username === cfg.admin) {
            console.info("whispered command", _botusername, message)
            message = message.replace("\\", "@")
            if (message.startsWith(cfg.botAddressPrefix)) {
                command(username, message)
            } else {
                bot.chat(message)
                // bot.chat("/" + message)
            }
        } else {
            bot.whisper(cfg.admin, `gossip ${username}: ${message}`)
            console.info(username, "whispered", _botusername, message)
        }
    }
    , chat: command
    , kicked: function rejoin(reason, loggedIn) {
        console.warn(reason, loggedIn && "logged_in")
        if (reason.extra && reason.extra[0].text === "Server closed") {
            bot.quit()
            bot.end()
            // TODO implement all startup features (maybe refactor all into a single function / module?)
            setTimeout((bot, cfg) => {
                bot = mineflayer.createBot(cfg.botOptions)
            }, 15 * 60 * 1000, bot, cfg);
        }
    }
    // , message: systemMessage
    , messagestr: function systemMessageStr(...args) { console.log("cmd msgstr:", ...args) }
    , "chat:web": commandWeb
}

function systemMessage(...args) {
    if (args[0]?.text) return
    const metadata = (args[0]?.extra || args[0]?.with)?.map(v => v.text)
    console.log(
        "cmd msg:",
        args[0]?.text || args[0]?.translate,
        args[0]?.extra?.length || args[0]?.with?.length || Object.keys(args[0]?.json).length - 1,
        metadata.length > 0 && metadata || args[0],
        args.slice(1)
    )
}

function commandWeb([[mode, username, message]]) {
    // console.log("web msg:", mode, username, message)
    message && command(username, message)
}

function _clientSystemMessage(...args) {
    console.log("cmd chat:", args[0]?.message, args[0]?.extra?.length, args[0]?.extra, args[0], args.slice(1))
}

const events_registered = []

function command(username, message) {
    // TODO better name, maybe an array?
    cfg.botAddressPrefix = cfg.botAddressPrefix || "!"

    function fuzzyRespond(responses, probability = 1, timeout = 1) {
        if (Math.random() < probability) {
            const response = responses[Math.floor(Math.random() * responses.length)]
            return setTimeout(() => bot.chat(response), timeout * Math.random() * 1000)
        }
    }

    function swingArm(swung = 3) {
        if (swung > 0) {
            setTimeout(swingArm, 500 * Math.random(), --swung)
            bot.swingArm()
        }
    }

    if (username === bot.username && !message.startsWith(cfg.botAddressPrefix)) return

    const player = bot.players[username] ? bot.players[username].entity : null

    if (message.startsWith("zzz")) {
        bot.chat("/afk")
        cfg.plugins.sleeper.sleep()
        // if(cfg)
        return
    }


    if (message.startsWith(cfg.botAddressPrefix) || cfg.botAddressRegex.test(message)) {
        message = cfg.botAddressRegex.test(message) ? cfg.botAddressRegex.exec(message)[1] : message
        console.log(message)
        // remove `!`
        message = message.startsWith(cfg.botAddressPrefix) ? message.slice(cfg.botAddressPrefix.length) : message

        // TODO command dispatchEvent, for aliases
        function subcommand(message) {
            const message_parts = message.split(/\s+/)

            switch (message_parts[0]) {
                case "stop":
                    bot.pathfinder && bot.pathfinder.setGoal(null)
                    bot.stopDigging()
                    bot.chat("ok")
                    break;

                case "mute":
                case "quiet":
                case "silent":
                    cfg.quiet = !cfg.quiet
                    cfg.quiet || bot.chat(`ok, ${cfg.quiet ? "" : "not "}being ${message_parts[0]}`)
                    break;
                // case "follow":
                //     // if(username === cfg.admin)
                //     cfg.stateMachines.follow.transitions[4].trigger()
                //     // cfg.stateMachines.follow.transitions[1].trigger()
                //     break;
                // case "stay":
                //     // if(username === cfg.admin)
                //     cfg.stateMachines.follow.transitions[3].trigger()
                //     break;
                case "echo":
                    // bot.chat(message_parts[1])
                    // bot.chat(message.slice(1))
                    cfg.quiet && bot.whisper(username, message) || bot.chat(message)
                    break;
                case "autosleep":
                case "sleep":
                    message_parts[1] = message_parts[0] == "autosleep" ? "auto" : message_parts[1]
                    switch (message_parts[1]) {
                        case "auto":
                            cfg.sleep.auto = !cfg.sleep.auto
                            bot.chat(`ok, ${cfg.sleep.auto ? "" : "not "}auto sleeping`)
                            bot.chat("/afk")
                            break;
                        case "silent":
                        case "quiet":
                            cfg.sleep.quiet = !cfg.sleep.quiet
                            bot.chat(`ok, ${cfg.sleep.quiet ? "" : "not "}sleeping quietly`)
                            break;
                        case "timeout":
                            if (!message_parts[2]) {
                                bot.chat(`sleeping every ${Math.round(cfg.sleep.timeout / 60 / 1000)}mins`)
                                return
                            }
                            const timeout = parseFloat(message_parts[2], 10)
                            if (timeout) {
                                cfg.sleep.timeout = timeout * 60 * 1000
                                cfg.sleep.timeoutFn = null
                                cfg.plugins.sleeper.sleep(true) //reset timer
                                bot.chat(`ok, next sleep attempt in ${timeout}mins`)
                                break;
                            }
                        default:
                            bot.chat(`usage: !sleep [auto | quiet | timeout <mins>], or zzz for manual sleep`)
                            break;
                    }
                    break; //todo; needed?
                case "zzz":
                    cfg.plugins.sleeper.sleep()
                case "afk":
                    bot.chat("/afk")
                    break;
                case "awaken":
                case "wake":
                case "wakeup":
                    cfg.plugins.sleeper.wake()
                    break;
                case "autoeat":
                case "eat":
                    switch (message_parts[1]) {
                        case "auto":
                            cfg.eat.auto = !cfg.eat.auto
                            bot.chat(`ok, ${cfg.eat.auto ? "" : "not "}auto eating `)
                            break;
                        case "at":
                        case "set":
                            const amount = parseInt(message_parts[2], 10)
                            if (amount < 20 && amount > 0) {
                                cfg.eat.startAt = amount
                                cfg.eat.quiet || bot.chat(`ok, eating when hunger at ${amount}`)
                            }
                            break
                        case "silent":
                        case "quiet":
                            cfg.eat.quiet = !!!cfg.eat.quiet
                            break;
                        default:
                            cfg.plugins.eater.eat((err) => { if (err) { bot.chat(err.message) } })
                            // bot.chat(`usage: !sleep [auto | quiet | timeout <mins>], or zzz for manual sleep`)
                            break;
                    }
                    break;

                case "follow":
                    switch (message_parts.length) {
                        case 1:
                            subcommand("go follow me")
                            break;

                        default:
                            subcommand("go " + message)
                            break;
                    }
                    break;
                case "come":
                    switch (message_parts[1]) {
                        case "close":
                        case "closer":
                            subcommand("go follow close")
                            break
                        case "up":
                        case "down":
                            cfg.plugins.mover.moveY(player.position)
                            break
                        default:
                            subcommand("go follow once")
                    }
                    break;
                case "ride":
                case "mount":
                    cfg.plugins.mover.command(message_parts)
                    break
                case "unride":
                case "getoff":
                case "unmount":
                case "dismount":
                    bot.dismount()
                    bot.vehicle = void 0
                    break
                case "move":
                case "go":
                    cfg.plugins.mover.command(message_parts.slice(1), player)
                    break;

                case "attack":
                case "rage":
                case "ragemode":
                case "guard":
                    switch (message_parts.length) {
                        case 1:
                            if (!player) {
                                bot.chat("can't see you.")
                                return
                            }
                            bot.chat('for glory!')
                            cfg.plugins.guard.guardArea(player.position)
                            break
                        case 2:
                            switch (message_parts[1]) {
                                case "self":
                                    cfg.guard.self = !cfg.guard.self
                                    bot.chat(`ok, ${cfg.guard.self ? "no longer being altruistic" : "self sacrifice!"}`)
                                    return;
                                case "stop":
                                    cfg.plugins.guard.stopGuarding()
                                    bot.chat('no longer guarding this area.')
                                    return;

                                default:
                                    break;
                            }
                        default:
                            bot.chat("don't know wym")
                    }
                    //     entity = new BehaviorGetClosestEntity(bot, bot.nearestEntity(), a => EntityFilters().MobsOnly(a))
                    //     if (entity) {
                    //         bot.attack(entity, true)
                    //     } else {
                    //         bot.chat('no nearby entities')
                    //     }
                    //     // bot.attack(new BehaviorGetClosestEntity(bot, {}, EntityFilters().MobsOnly()))
                    break;
                case "find":
                    switch (message_parts.length) {
                        case 2:
                            cfg.plugins.finder.findBlocks(message_parts[1])
                            break

                        default:
                            break;
                    }
                    break
                // TODO move look (and maybe find) to informer plugin?
                case "look":
                case "lookat":
                    // const coords = v(message_parts.splice(1))
                    switch (message_parts.length) {
                        case 1:
                            bot.lookAt(bot.nearestEntity().position)
                            break
                        case 2:
                            switch (message_parts[1]) {
                                case "me":
                                    if (player) {
                                        bot.lookAt(player.position.offset(0, 1, 0))
                                    } else {
                                        cfg.quiet || bot.chat("can't see you")
                                    }
                                    break;

                                case "this":
                                    // TODO lookat the block the user is looking at
                                    // Currently looks player position
                                    if (player) {
                                        bot.lookAt(player.position)
                                    } else {
                                        cfg.quiet || bot.chat("can't see you")
                                    }
                                    break
                                default:
                                    const aPlayer = bot.players[message_parts[2]] ? bot.players[message_parts[2]].entity : null
                                    if (aPlayer) bot.lookAt(aPlayer.position.offset(0, 1, 0))
                                    break;
                            }
                            break
                        case 3:
                            todo()
                            // bot.lookAt({})
                            break
                        case 4:
                            //TODO more checks
                            bot.lookAt(v(message_parts.splice(1)))
                            break
                        default:
                            break
                    }
                    break
                case "info":
                    cfg.plugins.informer.command(message_parts.splice(1), player)
                    break
                // case "use":
                //     bot.useOn(bot.nearestEntity())
                //     break;

                // // TODO move all inventory related tasks into inventory.js
                case "craft":
                    cfg.plugins.inventory.craftItem(message_parts[1])
                    break
                // case "give":
                // //     switch (message_parts[1]) {
                // //         case "hand":
                // //         case "right":
                // //             break;
                // //         case "left":
                // //             break;
                // //         // case "slot":
                // //         default:
                // //             let slot = parseInt(message_parts[1])
                // //             if (!isNaN(slot)) {

                // //             } else {

                // //             }
                // //             break;
                // //     }
                // //     break;
                // case "take":
                //     // TODO take only what's requested, then throw all the rest
                //     // TODO take all

                // TODO move subcommands to cfg.plugins.inventory.itemByName
                case "toss":
                case "drop":
                    if (!message_parts[1]) { return false } // FIXME, works but ugly
                    if (!mcData.findItemOrBlockByName(message_parts[1])) {
                        console.log("doesn't exist:", message_parts[1])
                        cfg.quiet || bot.chat(`item doesn't exist: ${message_parts[1]}`)
                        return false
                    }
                    const item = cfg.plugins.inventory.itemByName(message_parts[1])
                    if (!item) {
                        console.log("don't have:", message_parts[1])
                        cfg.quiet || bot.chat(`don't have item: ${message_parts[1]}`)
                        return false
                    }
                    switch (message_parts.length) {
                        case 2:
                            bot.tossStack(
                                item,
                                (err) => {
                                    if (err) {
                                        console.error(err)
                                        cfg.quiet || bot.chat(err.message)
                                    }
                                }
                            )
                            break
                        case 3:
                            const amount = parseInt(message_parts[2])
                            bot.toss(
                                item.type,
                                null, //metadata
                                amount,
                                (err) => {
                                    if (err) {
                                        console.error(err)
                                        cfg.quiet || bot.chat(err.message)
                                    }
                                }
                            )
                            break
                        default:
                            break
                    }
                    break;
                case "sm":
                case "step":
                    cfg.plugins.statemachine?.command?.(
                        message_parts[0] == "sm" ? message_parts.slice(1) : message_parts, player
                    )
                        // TODO refactor into plugin detection and command exec function
                        // safecommand(plugin_name, message_parts, player)
                        // message_parts includes command?
                        || bot.chat("statemachine plugin not loaded")
                    break
                case "location":
                    // TODO put in /lib/location
                    switch (message_parts[1]) {
                        case "add":
                        case "record":

                            break;

                        default:
                            break;
                    }
                case "where":
                case "where?":
                    // TODO put in /lib/location
                    console.log(bot.entity.position)
                    if (cfg.mods.includes(username)) //anarchy
                        bot.chat(
                            bot.game.dimension.split(":", 2)[1].replace("_", " ")
                            + " " + bot.entity.position.floored().toString()
                        )
                    break;
                case "warp":
                    // if (message_parts[1] == "spawn")
                    // if (cfg.mods.includes(username)) //anarchy
                    bot.chat("/" + message)
                    break;

                default:
                    if (cfg.mods.includes(username))
                        bot.chat("/" + message)
                    break;

            }
        }
        subcommand(message)
    } else {
        // TODO, maybe extract to a new function `fuzzychat`?, so can address direct messages
        switch (message) {
            case "wassup":
            case "what's cooking":
            case "what's new":
            case "what's up":
            case "whats cooking":
            case "whats new":
            case "whats up":
            case "sup":
            case "suh":
                fuzzyRespond([
                    "jus chilin", "nothin", "random stuff"
                ], 0.3, 3)
            case "hi":
            case "hey":
            case "hello":
            case "ola":
            case "howdy":
            case "heyo":
            case "yo":
                if (player) bot.lookAt(player.position.offset(0, 1, 0))

                // TODO sneak
                // function swingArm() {
                //     if (swung > 0) {
                //         setTimeout(swing, 500 * Math.random())
                //         bot.p()
                //         swung--
                //     }
                // }

                setTimeout(swingArm, 1000, 4) // or sneak greating
                return
            case "F":
                return fuzzyRespond(["F"], 0.9, 1)
            case "RIP":
                return fuzzyRespond(["F", "oh no"], 0.3, 2)
            case "69":
            case "cool":
                Math.random() < 0.5 && bot.chat("nice!")
                return
            case "awesome":
            case "superb":
            case "nice":
            case "nice!":
                return fuzzyRespond(["cool", "very nice!"], 0.3, 5)
            case "good bot":
                return fuzzyRespond(["thanks", "why, thank you!", ":)", "(:", "you're too kind!"], 1, 5)
            case "bad bot":
            case "not nice":
                return fuzzyRespond([":(", "):", "sorry"], 0.1, 10)
            default:
                break;
        }
    }
}

const load = (config) => {
    cfg = config
    bot = cfg.bot

    mcData = bot.mcData || (bot.mcData = require('minecraft-data')(bot.version))
    for (const [key, fn] of Object.entries(events)) {
        events_registered.push(
            bot.on(key, fn)
        )
    }

    // bot._client.on("chat", _clientSystemMessage)
}

const unload = () => {
    console.log("events_registered:", events_registered.length, "of", bot._eventsCount)
    for (const [key, fn] of Object.entries(events)) {
        bot.off(key, fn)
        events_registered.shift()
    }
    console.log("events_registered:", bot._eventsCount)

    // bot._client.off("chat", _clientSystemMessage)
}

module.exports = { load, unload, events_registered, command }