openapi: 3.0.3
info:
  title: Amici Scommesse API
  version: 1.1.0
  description: |
    API per l'applicazione Amici Scommesse - Sistema di gestione scommesse tra amici.

    **Architettura**: L'API utilizza una architettura a layer con dependency injection,
    validazione automatica input, e formato risposte standardizzato.

    **Versioning**:
    - `/api/v1/*` - API corrente (formato standardizzato)
    - `/api/legacy/*` - API legacy (backward compatibility)

    **Autenticazione**: Mock authentication (Mario Rossi hardcoded). JWT da implementare.
  contact:
    name: API Support
    email: support@amiciscommesse.com
  license:
    name: ISC

servers:
  - url: http://localhost:3000/api/v1
    description: Development server (v1)
  - url: http://localhost:3000/api/legacy
    description: Legacy API (backward compatibility)

tags:
  - name: Groups
    description: Gestione gruppi di utenti
  - name: Bets
    description: Gestione scommesse
  - name: Friend Requests
    description: Gestione richieste di amicizia
  - name: Users
    description: Gestione profilo utente
  - name: Initial Data
    description: Caricamento dati iniziali
  - name: Health
    description: Health check endpoint

components:
  schemas:
    # ===== Success Response Wrapper =====
    SuccessResponse:
      type: object
      required:
        - success
        - timestamp
      properties:
        success:
          type: boolean
          example: true
        message:
          type: string
          example: Operation successful
        data:
          type: object
        timestamp:
          type: string
          format: date-time
          example: '2024-01-01T00:00:00.000Z'

    # ===== Error Response Wrapper =====
    ErrorResponse:
      type: object
      required:
        - success
        - message
        - timestamp
      properties:
        success:
          type: boolean
          example: false
        message:
          type: string
          example: Error message
        errors:
          type: array
          items:
            type: object
            properties:
              field:
                type: string
                example: name
              message:
                type: string
                example: Name is required
        timestamp:
          type: string
          format: date-time
          example: '2024-01-01T00:00:00.000Z'

    # ===== User =====
    User:
      type: object
      properties:
        id:
          type: integer
          example: 1
        name:
          type: string
          example: Mario Rossi
        email:
          type: string
          format: email
          example: mario.rossi@example.com
        avatarUrl:
          type: string
          nullable: true
          example: https://example.com/avatar.jpg
        score:
          type: integer
          example: 100

    # ===== Group =====
    Group:
      type: object
      properties:
        id:
          type: integer
          example: 1
        name:
          type: string
          example: Gruppo Calcio
        members:
          type: array
          items:
            $ref: '#/components/schemas/User'

    # ===== Participant =====
    Participant:
      type: object
      properties:
        user:
          oneOf:
            - type: integer
            - $ref: '#/components/schemas/User'
        role:
          type: string
          enum: [PARTICIPANT, OBSERVER]
          example: PARTICIPANT

    # ===== Bet =====
    Bet:
      type: object
      properties:
        id:
          type: string
          example: 507f1f77bcf86cd799439011
        title:
          type: string
          example: Chi vince il campionato?
        description:
          type: string
          nullable: true
          example: Scommessa sul vincitore del campionato 2024
        stake:
          type: string
          example: 50 euro
        participants:
          type: array
          items:
            $ref: '#/components/schemas/Participant'
        status:
          type: string
          enum: [ACTIVE, AWAITING_VALIDATION, COMPLETED, EXPIRED]
          example: ACTIVE
        startDate:
          type: string
          format: date-time
          example: '2024-01-01T00:00:00.000Z'
        endDate:
          type: string
          format: date-time
          nullable: true
          example: '2024-12-31T23:59:59.000Z'
        isPublic:
          type: boolean
          example: false
        groupId:
          type: string
          nullable: true
          example: '1'
        winner:
          oneOf:
            - type: integer
            - $ref: '#/components/schemas/User'
          nullable: true

    # ===== Friend Request =====
    FriendRequest:
      type: object
      properties:
        id:
          type: integer
          example: 1
        fromUserId:
          type: integer
          example: 1
        toUserId:
          type: integer
          example: 2
        status:
          type: string
          enum: [PENDING, ACCEPTED, REJECTED]
          example: PENDING
        fromUser:
          $ref: '#/components/schemas/User'
        toUser:
          $ref: '#/components/schemas/User'
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time

    # ===== Create Group Request =====
    CreateGroupRequest:
      type: object
      required:
        - name
        - members
      properties:
        name:
          type: string
          minLength: 1
          maxLength: 100
          example: Gruppo Calcio
        members:
          type: array
          minItems: 1
          items:
            type: integer
          example: [1, 2, 3]

    # ===== Update Group Request =====
    UpdateGroupRequest:
      type: object
      properties:
        name:
          type: string
          minLength: 1
          maxLength: 100
          example: Nuovo Nome Gruppo

    # ===== Add Members Request =====
    AddMembersRequest:
      type: object
      required:
        - userIds
      properties:
        userIds:
          type: array
          minItems: 1
          items:
            type: integer
          example: [4, 5]

    # ===== Create Bet Request =====
    CreateBetRequest:
      type: object
      required:
        - title
        - stake
        - participants
      properties:
        title:
          type: string
          minLength: 1
          maxLength: 200
          example: Chi vince il campionato?
        description:
          type: string
          maxLength: 1000
          example: Scommessa sul vincitore
        stake:
          type: string
          minLength: 1
          example: 50 euro
        participants:
          type: array
          minItems: 1
          items:
            type: object
            required:
              - user
              - role
            properties:
              user:
                type: integer
              role:
                type: string
                enum: [PARTICIPANT, OBSERVER]
          example:
            - user: 1
              role: PARTICIPANT
            - user: 2
              role: PARTICIPANT
        isPublic:
          type: boolean
          default: false
          example: false
        groupId:
          type: string
          nullable: true
          example: '1'

    # ===== Update Bet Request =====
    UpdateBetRequest:
      type: object
      properties:
        title:
          type: string
          minLength: 1
          maxLength: 200
        description:
          type: string
          maxLength: 1000
        stake:
          type: string
          minLength: 1
        status:
          type: string
          enum: [ACTIVE, AWAITING_VALIDATION, COMPLETED, EXPIRED]
        endDate:
          type: string
          format: date-time
        winner:
          type: integer
          nullable: true

    # ===== Send Friend Request =====
    SendFriendRequestRequest:
      type: object
      required:
        - identifier
      properties:
        identifier:
          oneOf:
            - type: integer
            - type: string
          example: 2
          description: User ID, name, or email

    # ===== Update User Request =====
    UpdateUserRequest:
      type: object
      properties:
        name:
          type: string
          minLength: 1
          maxLength: 100
          example: Mario Rossi
        email:
          type: string
          format: email
          example: mario.rossi@example.com
        avatarUrl:
          type: string
          format: uri
          nullable: true
          example: https://example.com/avatar.jpg

    # ===== Initial Data =====
    InitialData:
      type: object
      properties:
        currentUser:
          $ref: '#/components/schemas/User'
        users:
          type: array
          items:
            $ref: '#/components/schemas/User'
        friends:
          type: array
          items:
            $ref: '#/components/schemas/User'
        friendRequests:
          type: array
          items:
            $ref: '#/components/schemas/FriendRequest'
        groups:
          type: array
          items:
            $ref: '#/components/schemas/Group'
        userBets:
          type: array
          items:
            $ref: '#/components/schemas/Bet'
        publicBets:
          type: array
          items:
            $ref: '#/components/schemas/Bet'

    # ===== Health Status =====
    HealthStatus:
      type: object
      properties:
        status:
          type: string
          enum: [healthy, unhealthy]
          example: healthy
        timestamp:
          type: string
          format: date-time
        services:
          type: object
          properties:
            postgres:
              type: string
              example: connected
            mongodb:
              type: string
              example: connected

  responses:
    ValidationError:
      description: Validation error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            success: false
            message: Validation failed
            errors:
              - field: name
                message: Name is required
            timestamp: '2024-01-01T00:00:00.000Z'

    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            success: false
            message: Resource not found
            timestamp: '2024-01-01T00:00:00.000Z'

    InternalError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            success: false
            message: Internal server error
            timestamp: '2024-01-01T00:00:00.000Z'

paths:
  # ==================== GROUPS ====================
  /groups:
    get:
      tags:
        - Groups
      summary: Lista tutti i gruppi
      description: Recupera la lista di tutti i gruppi con i loro membri
      responses:
        '200':
          description: Lista gruppi recuperata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: array
                        items:
                          $ref: '#/components/schemas/Group'
        '500':
          $ref: '#/components/responses/InternalError'

    post:
      tags:
        - Groups
      summary: Crea un nuovo gruppo
      description: Crea un nuovo gruppo con i membri specificati
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateGroupRequest'
      responses:
        '201':
          description: Gruppo creato con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Group'
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  /groups/{id}:
    get:
      tags:
        - Groups
      summary: Dettaglio gruppo
      description: Recupera i dettagli di un gruppo specifico con i membri
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
          example: 1
      responses:
        '200':
          description: Gruppo recuperato con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Group'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

    put:
      tags:
        - Groups
      summary: Aggiorna gruppo
      description: Aggiorna le informazioni di un gruppo
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateGroupRequest'
      responses:
        '200':
          description: Gruppo aggiornato con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Group'
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

    delete:
      tags:
        - Groups
      summary: Elimina gruppo
      description: Elimina un gruppo esistente
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
      responses:
        '200':
          description: Gruppo eliminato con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: 'null'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  /groups/{id}/members:
    put:
      tags:
        - Groups
      summary: Aggiungi membri al gruppo
      description: Aggiunge uno o più membri a un gruppo esistente
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AddMembersRequest'
      responses:
        '200':
          description: Membri aggiunti con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Group'
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  /groups/{id}/members/{userId}:
    delete:
      tags:
        - Groups
      summary: Rimuovi membro dal gruppo
      description: Rimuove un membro da un gruppo
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
        - name: userId
          in: path
          required: true
          schema:
            type: integer
      responses:
        '200':
          description: Membro rimosso con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Group'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  # ==================== BETS ====================
  /bets:
    get:
      tags:
        - Bets
      summary: Lista tutte le scommesse
      description: Recupera la lista di tutte le scommesse con dati utente popolati
      responses:
        '200':
          description: Lista scommesse recuperata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: array
                        items:
                          $ref: '#/components/schemas/Bet'
        '500':
          $ref: '#/components/responses/InternalError'

    post:
      tags:
        - Bets
      summary: Crea una nuova scommessa
      description: Crea una nuova scommessa con partecipanti
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateBetRequest'
      responses:
        '201':
          description: Scommessa creata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Bet'
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  /bets/{id}:
    get:
      tags:
        - Bets
      summary: Dettaglio scommessa
      description: Recupera i dettagli di una scommessa specifica
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
          example: 507f1f77bcf86cd799439011
      responses:
        '200':
          description: Scommessa recuperata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Bet'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

    put:
      tags:
        - Bets
      summary: Aggiorna scommessa
      description: Aggiorna i dettagli di una scommessa
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateBetRequest'
      responses:
        '200':
          description: Scommessa aggiornata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/Bet'
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

    delete:
      tags:
        - Bets
      summary: Elimina scommessa
      description: Elimina una scommessa esistente
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Scommessa eliminata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: 'null'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  # ==================== FRIEND REQUESTS ====================
  /friend-requests:
    get:
      tags:
        - Friend Requests
      summary: Lista amici
      description: Recupera la lista di amici dell'utente corrente
      responses:
        '200':
          description: Lista amici recuperata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: array
                        items:
                          $ref: '#/components/schemas/User'
        '500':
          $ref: '#/components/responses/InternalError'

    post:
      tags:
        - Friend Requests
      summary: Invia richiesta di amicizia
      description: Invia una richiesta di amicizia a un utente
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SendFriendRequestRequest'
      responses:
        '201':
          description: Richiesta inviata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/FriendRequest'
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '409':
          description: Conflict - Already friends or request exists
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '500':
          $ref: '#/components/responses/InternalError'

  /friend-requests/pending:
    get:
      tags:
        - Friend Requests
      summary: Lista richieste pending
      description: Recupera le richieste di amicizia pending per l'utente corrente
      responses:
        '200':
          description: Lista richieste recuperata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: array
                        items:
                          $ref: '#/components/schemas/FriendRequest'
        '500':
          $ref: '#/components/responses/InternalError'

  /friend-requests/{id}/accept:
    post:
      tags:
        - Friend Requests
      summary: Accetta richiesta di amicizia
      description: Accetta una richiesta di amicizia pending
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
      responses:
        '200':
          description: Richiesta accettata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: object
                        properties:
                          message:
                            type: string
                            example: Friend request accepted successfully
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  /friend-requests/{id}:
    delete:
      tags:
        - Friend Requests
      summary: Rifiuta/cancella richiesta
      description: Rifiuta o cancella una richiesta di amicizia
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
      responses:
        '200':
          description: Richiesta rifiutata con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        type: object
                        properties:
                          message:
                            type: string
                            example: Friend request rejected successfully
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  # ==================== USERS ====================
  /users/current:
    put:
      tags:
        - Users
      summary: Aggiorna profilo utente
      description: Aggiorna il profilo dell'utente corrente
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateUserRequest'
      responses:
        '200':
          description: Profilo aggiornato con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/User'
        '400':
          $ref: '#/components/responses/ValidationError'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'

  # ==================== INITIAL DATA ====================
  /initial-data:
    get:
      tags:
        - Initial Data
      summary: Carica dati iniziali
      description: |
        Carica tutti i dati iniziali necessari per l'applicazione in una singola chiamata.
        Include: utente corrente, lista utenti, amici, richieste di amicizia, gruppi, scommesse.
      responses:
        '200':
          description: Dati iniziali caricati con successo
          content:
            application/json:
              schema:
                allOf:
                  - $ref: '#/components/schemas/SuccessResponse'
                  - type: object
                    properties:
                      data:
                        $ref: '#/components/schemas/InitialData'
        '500':
          $ref: '#/components/responses/InternalError'

# Health Check (non versioned)
/health:
  get:
    tags:
      - Health
    summary: Health check
    description: Verifica lo stato dei database (PostgreSQL e MongoDB)
    servers:
      - url: http://localhost:3000
        description: Health check endpoint (non versioned)
    responses:
      '200':
        description: Sistema healthy
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/HealthStatus'
      '503':
        description: Sistema unhealthy
        content:
          application/json:
            schema:
              type: object
              properties:
                status:
                  type: string
                  example: unhealthy
                timestamp:
                  type: string
                  format: date-time
                error:
                  type: string
                  example: Database connection failed