import type { NucleusClient } from "../utils/client.js";
import type { Message, MessageReference } from "discord.js";
import type Discord from "discord.js";
import * as diff from "diff";

export const event = "messageUpdate";

export async function callback(client: NucleusClient, oldMessage: Message, newMessage: Message) {
    if (newMessage.author.id === client.user!.id) return;
    if (newMessage.author.bot) return;
    if (!newMessage.guild) return;
    const { log, isLogging, NucleusColors, entry, renderUser, renderDelta, renderNumberDelta, renderChannel } =
        client.logger;
    const replyTo: MessageReference | null = newMessage.reference;
    const newContent = newMessage.cleanContent.replaceAll("`", "‘");
    const oldContent = oldMessage.cleanContent.replaceAll("`", "‘");
    let attachmentJump = "";
    const config = (await client.database.guilds.read(newMessage.guild.id)).logging.attachments.saved[
        newMessage.channel.id + newMessage.id
    ];
    if (config) {
        attachmentJump = ` [[View attachments]](${config})`;
    }
    if (newMessage.crosspostable !== oldMessage.crosspostable) {
        if (!(await isLogging(newMessage.guild.id, "messageAnnounce"))) return;
        if (!replyTo) {
            const data = {
                meta: {
                    type: "messageAnnounce",
                    displayName: "Message Published",
                    calculateType: "messageAnnounce",
                    color: NucleusColors.green,
                    emoji: "MESSAGE.CREATE",
                    timestamp: newMessage.editedTimestamp ?? Date.now()
                },
                separate: {
                    end: `[[Jump to message]](${newMessage.url})`
                },
                list: {
                    messageId: entry(newMessage.id, `\`${newMessage.id}\``),
                    sentBy: entry(newMessage.author.id, renderUser(newMessage.author)),
                    sentIn: entry(
                        newMessage.channel.id,
                        renderChannel(newMessage.channel as Discord.GuildBasedChannel)
                    ),
                    sent: entry(newMessage.createdTimestamp, renderDelta(newMessage.createdTimestamp)),
                    published: entry(Date.now(), renderDelta(Date.now())),
                    mentions: renderNumberDelta(oldMessage.mentions.users.size, newMessage.mentions.users.size),
                    attachments: entry(
                        renderNumberDelta(oldMessage.attachments.size, newMessage.attachments.size),
                        renderNumberDelta(oldMessage.attachments.size, newMessage.attachments.size) + attachmentJump
                    )
                },
                hidden: {
                    guild: newMessage.guild.id
                }
            };
            return log(data);
        }
    }
    if (!(await isLogging(newMessage.guild.id, "messageUpdate"))) return;
    if (!newMessage.editedTimestamp) {
        return;
    }
    const differences = diff.diffChars(oldContent, newContent);
    console.log(differences);
    let contentEdit = "";
    if (differences.map((d) => (d.added || d.removed ? 1 : 0)).filter((f) => f === 1).length > 0) {
        const green = "\x1B[36m";
        const red = "\x1B[41m";
        const skipped = "\x1B[40;33m";
        const reset = "\x1B[0m";
        const bold = "\x1B[1m";
        const cutoff = 20;
        differences.forEach((part) => {
            if (!part.added && !part.removed && part.value.length > cutoff) {
                contentEdit +=
                    reset +
                    part.value.slice(0, cutoff / 2) +
                    skipped +
                    `(${part.value.length - cutoff} more)` +
                    reset +
                    part.value.slice(-(cutoff / 2));
            } else {
                if (part.added || part.removed) {
                    part.value = part.value.replaceAll(" ", "▁");
                }
                contentEdit += (part.added ? green : part.removed ? red : "") + part.value + reset;
            }
        });
        contentEdit = contentEdit.slice(0, 2000);
        contentEdit += `\n\n${bold}Key:${reset} ${green}Added${reset} | ${red}Removed${reset} | ${skipped}Skipped${reset}`;
        const data = {
            meta: {
                type: "messageUpdate",
                displayName: "Message Edited",
                calculateType: "messageUpdate",
                color: NucleusColors.yellow,
                emoji: "MESSAGE.EDIT",
                timestamp: newMessage.editedTimestamp
            },
            separate: {
                start: `\`\`\`ansi\n${contentEdit}\`\`\``,
                end: `[[Jump to message]](${newMessage.url})`
            },
            list: {
                messageId: entry(newMessage.id, `\`${newMessage.id}\``),
                sentBy: entry(newMessage.author.id, renderUser(newMessage.author)),
                sentIn: entry(newMessage.channel.id, renderChannel(newMessage.channel as Discord.GuildBasedChannel)),
                sent: entry(newMessage.createdTimestamp, renderDelta(newMessage.createdTimestamp)),
                edited: entry(newMessage.editedTimestamp, renderDelta(newMessage.editedTimestamp)),
                mentions: renderNumberDelta(oldMessage.mentions.users.size, newMessage.mentions.users.size),
                attachments: entry(
                    renderNumberDelta(oldMessage.attachments.size, newMessage.attachments.size),
                    renderNumberDelta(oldMessage.attachments.size, newMessage.attachments.size) + attachmentJump
                ),
                repliedTo: entry(
                    replyTo ? replyTo.messageId! : null,
                    replyTo
                        ? `[[Jump to message]](https://discord.com/channels/${newMessage.guild.id}/${newMessage.channel.id}/${replyTo.messageId})`
                        : "None"
                )
            },
            hidden: {
                guild: newMessage.guild.id
            }
        };
        await log(data);
    }
}