import {DiscordUser, Prisma, PrismaClient} from "./Prisma.js";
import {Snowflake} from "discord-api-types";
import cuid from "cuid";

const userRegistrationSelect = {
    id: true,
    name: true,
    discordUser: true,
    gender: true,
    joinedAt: true,
} as const
export type UserRegistrationData = Prisma.UserGetPayload<{ select: typeof userRegistrationSelect }>

const genderListSelect = {
    id: true,
    name: true,
} as const
export type GenderListData = Prisma.GenderGetPayload<{ select: typeof genderListSelect }>

export class UserManager {
    readonly client: PrismaClient

    constructor(client: PrismaClient) {
        this.client = client
    }

    async registerOrUpdateDiscordUser({
                                          discordId,
                                          username,
                                          discriminator,
                                      }: { discordId: Snowflake, username: string, discriminator: string }): Promise<DiscordUser> {
        return (await this.client.discordUser.upsert({
            where: {
                discordId,
            },
            create: {
                discordId,
                username,
                discriminator,
                userId: null,
            },
            update: {
                username,
                discriminator,
                user: {
                    update: {
                        lastActive: new Date()
                    }
                }
            },
            include: {
                user: true,
            }
        }))
    }

    async registerOrReregisterUserFromDiscord({
                                                  discordId,
                                                  username,
                                                  discriminator,
                                                  name,
                                                  genderId
                                              }: { discordId: Snowflake, username: string, discriminator: string, name: string, genderId: string }): Promise<{
        user: UserRegistrationData, created: boolean
    }> {
        const userId = cuid()
        const user = (await this.client.discordUser.upsert({
            where: {
                discordId,
            },
            update: {
                username,
                discriminator,
                user: {
                    upsert: {
                        update: {
                            name,
                            gender: {
                                connect: {
                                    id: genderId,
                                }
                            },
                            lastActive: new Date()
                        },
                        create: {
                            id: userId,
                            name,
                            gender: {
                                connect: {
                                    id: genderId,
                                }
                            },
                        }
                    }
                }
            },
            create: {
                discordId,
                username,
                discriminator,
                user: {
                    create: {
                        id: userId,
                        name,
                        gender: {
                            connect: {
                                id: genderId,
                            }
                        },
                    }
                }
            },
            select: {
                user: {
                    select: userRegistrationSelect
                }
            },
        })).user
        if (user === null) {
            throw Error("...Somehow, there wasn't a user to return?!")
        }
        return {
            user,
            created: user.id === userId,
        }
    }

    async getGenders(): Promise<GenderListData[]> {
        return this.client.gender.findMany({
            select: genderListSelect
        })
    }
}