// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

generator client {
    provider = "prisma-client-js"
}

datasource db {
    provider = "postgresql"
    url      = env("DATABASE_URL")
}

/// An event is the representation of a gathering of people in a certain place at a certain time.
model Event {
    id           Int           @id @default(autoincrement())
    //
    slug         String
    createdAt    DateTime      @default(now())
    updatedAt    DateTime      @updatedAt
    viewPassword String?
    joinPassword String?
    //
    name         String
    description  String
    postcard     String?
    startTime    DateTime?
    endTime      DateTime?
    location     String?
    //
    partecipants Partecipant[]
    neededItems  Item[]
    vehicles     Vehicle[]
}

/// A user is a person who is using the Festa website, who logged in via Telegram.
model User {
    id           BigInt   @id
    firstName    String
    lastName     String?
    username     String?
    photoUrl     String?
    lastAuthDate DateTime
    hash         String
}

/// A partecipant is a person who may or may not partecipate to the event.
model Partecipant {
    id          Int                 @id @default(autoincrement())
    eventId     Int
    event       Event               @relation(fields: [eventId], references: [id])
    //
    name        String
    email       String
    //
    means       PartecipationMeans
    createdAt   DateTime            @default(now())
    joinedAt    DateTime?
    //
    answer      PartecipationAnswer
    shouldBring Item[]
    drives      Vehicle[]           @relation("VehicleDrive")
    rides       Vehicle[]           @relation("VehicleRide")
    expenses    Transaction[]       @relation("TransactionFrom")
    income      Transaction[]       @relation("TransactionTo")
}

enum PartecipationMeans {
    CREATOR
    INVITED
    ACCEPTED
    JOINED
}

enum PartecipationAnswer {
    HOST
    YES
    MAYBE
    NO
    PENDING
}

/// An item which should be bought and brought by somebody to the event.
model Item {
    id         Int          @id @default(autoincrement())
    eventId    Int
    event      Event        @relation(fields: [eventId], references: [id])
    //
    quantity   Int
    name       String
    purchased  Boolean      @default(false)
    //
    assignedId Int?
    assigned   Partecipant? @relation(fields: [assignedId], references: [id])
}

/// A vehicle which is being used to transport people from and to the event.
model Vehicle {
    id          Int           @id @default(autoincrement())
    eventId     Int
    event       Event         @relation(fields: [eventId], references: [id])
    //
    driverId    Int
    driver      Partecipant   @relation("VehicleDrive", fields: [driverId], references: [id])
    riders      Partecipant[] @relation("VehicleRide")
    //
    type        VehicleType   @default(CAR)
    slots       Int           @default(4)
    password    String?
    //
    voyage      VoyageType
    location    String
    departureAt DateTime
    arrivalAt   DateTime
}

enum VehicleType {
    CAR
    OTHER
}

enum VoyageType {
    TO
    FROM
}

/// A monetary transaction related to the event.
model Transaction {
    id       Int          @id @default(autoincrement())
    //
    fromId   Int?
    from     Partecipant? @relation("TransactionFrom", fields: [fromId], references: [id])
    toId     Int?
    to       Partecipant? @relation("TransactionTo", fields: [toId], references: [id])
    //
    amount   Decimal
    currency String
    reason   String
}