digraph DataModel {
    // Graph settings
    rankdir=TB
    compound=true
    splines=ortho
    node [shape=record, style="filled", fontname="Helvetica", fontsize=10]
    edge [fontname="Helvetica", fontsize=8]

    label="AMAR Mascotas - Data Model (Entity Relationships)\n\n"
    labelloc="t"
    fontsize=16
    fontname="Helvetica-Bold"

    // === USERS & AUTHENTICATION ===
    subgraph cluster_auth {
        label="Users & Authentication"
        style="rounded,filled"
        fillcolor="#E8F5E9"
        color="#2E7D32"

        auth_user [label="{auth.User|id: PK\luser name: str\lemail: str\lis_staff: bool\lis_superuser: bool\l}", fillcolor="#C8E6C9"]
    }

    // === PET OWNERS & PETS ===
    subgraph cluster_mascotas_owners {
        label="Pet Owners & Pets"
        style="rounded,filled"
        fillcolor="#E3F2FD"
        color="#1565C0"

        petowner [label="{PetOwner|id: PK\lemail: str (unique)\lphone: str\lfirst_name: str\llast_name: str\lneighborhood_id: FK\lcampaign_id: FK (opt)\lgeo_latitude: float\lgeo_longitude: float\laddress: str\l}", fillcolor="#BBDEFB"]

        pet [label="{Pet|id: PK\lowner_id: FK\lname: str\lpet_type: DOG/CAT\lbreed_id: FK (opt)\lgender: M/F\lage: int\lweight: decimal\lheight: decimal\lbirth_date: date\lallergies: text\lneutered: bool\lis_deceased: bool\lstate: puppy/adult/...\lprofile_picture: file\l}", fillcolor="#BBDEFB"]

        petvaccine [label="{PetVaccine|id: PK\lpet_id: FK\lvaccine_id: FK\lapplication_date: date\lnext_application: date\l}", fillcolor="#90CAF9"]

        petstudy [label="{PetStudy|id: PK\lpet_id: FK\lstudy_id: FK\ldate: date\lresult: text\limages: files\l}", fillcolor="#90CAF9"]
    }

    // === VETERINARIANS ===
    subgraph cluster_veterinarians {
        label="Veterinarians"
        style="rounded,filled"
        fillcolor="#FFF3E0"
        color="#E65100"

        veterinarian [label="{Veterinarian|id: PK\luser_id: FK\llicense: str\lemail: str\lphone: str\l}", fillcolor="#FFE0B2"]

        availability [label="{Availability|id: PK\lveterinarian_id: FK\lstart_day: 0-6\lend_day: 0-6\lstart_time: time\lend_time: time\l}", fillcolor="#FFCC80"]

        unavailability [label="{Unavailability|id: PK\lveterinarian_id: FK\lstart_date: date\lend_date: date\lstart_time: time\lend_time: time\lreason: str\l}", fillcolor="#FFCC80"]

        vet_specialty [label="{M2M: Vet-Specialty|veterinarian_id: FK\lspecialty_id: FK\l}", shape=diamond, fillcolor="#FFB74D"]

        vet_neighborhood [label="{M2M: Vet-Neighborhood|veterinarian_id: FK\lneighborhood_id: FK\l}", shape=diamond, fillcolor="#FFB74D"]
    }

    // === SERVICES & PRICING ===
    subgraph cluster_productos {
        label="Services & Pricing"
        style="rounded,filled"
        fillcolor="#F3E5F5"
        color="#7B1FA2"

        grupo [label="{Group|id: PK\lname: str\ldescription: text\l}", fillcolor="#E1BEE7"]

        category [label="{Category|id: PK\lgroup_id: FK\lname: str\ldescription: text\lvalue: int (order)\l}", fillcolor="#E1BEE7"]

        service [label="{Service|id: PK\lname: str\ldescription: text\lspecialty_id: FK\lcategory_id: FK\lduration: int (min)\lmodality: onsite/online\lpayment_sign_req: bool\lpet_type_filter: str\lage_filter: str\lweight_range: str\l}", fillcolor="#CE93D8"]

        prices [label="{Prices|id: PK\lservice_id: FK\lveterinarian_id: FK (opt)\lprice: decimal\lprofessional_fee: decimal\lpayment_sign: decimal\lfrom_date: date\lto_date: date\lactive: bool\l}", fillcolor="#BA68C8"]

        discounts [label="{Discounts|id: PK\lservice_id: FK\ldiscount: decimal (%)\lfrom_date: date\lto_date: date\lactive: bool\l}", fillcolor="#BA68C8"]

        servicecombo [label="{ServiceCombo|id: PK\lname: str\ldescription: text\ldiscount_percent: decimal\ldiscount_fixed: decimal\l}", fillcolor="#E1BEE7"]
    }

    // === CART & CHECKOUT ===
    subgraph cluster_cart {
        label="Cart & Checkout"
        style="rounded,filled"
        fillcolor="#E0F7FA"
        color="#00838F"

        cart [label="{Cart|id: PK\lpetowner_id: FK\lveterinarian_id: FK (opt)\luse_vet_prices: bool\lapply_turn_fee: bool\l}", fillcolor="#B2EBF2"]

        cartitem [label="{CartItem|id: PK\lcart_id: FK\lpet_id: FK (opt)\lservice_id: FK\lprice: decimal\lquantity: int\ltotal: decimal (calc)\l}", fillcolor="#80DEEA"]

        cartresumeitem [label="{CartResumeItem|id: PK\lcart_id: FK\lconcept: SUBTOTAL/\l        DESCUENTO/\l        ADELANTO/\l        TOTAL/\l        COSTO_SERVICIO\lamount: decimal\lorder: int\l}", fillcolor="#80DEEA"]

        cartpetreason [label="{CartPetReason|id: PK\lcart_id: FK\lpet_id: FK\lreason: text\l}", fillcolor="#80DEEA"]
    }

    // === SERVICE REQUESTS ===
    subgraph cluster_solicitudes {
        label="Service Requests (Workflow)"
        style="rounded,filled"
        fillcolor="#FFEBEE"
        color="#C62828"

        servicerequest [label="{ServiceRequest|id: PK\lpetowner_id: FK\lcart_id: FK\lveterinarian_id: FK (opt)\lstate: pending/vet_asked/\l      vet_accepted/coordinated/\l      payed/Confirmado/...\lreason: text\ldays_requested: JSON\ldate_coordinated: datetime\lhour_coordinated: time\lpay_number: str\lcampaign_id: FK (opt)\lattended_by_id: FK (opt)\l}", fillcolor="#FFCDD2"]

        statehistory [label="{StateHistory|id: PK\lservice_request_id: FK\lstate: str\ladditional_data: JSON\lcreated_at: datetime\luser_id: FK\l}", fillcolor="#EF9A9A"]

        vetasked [label="{VeterinarianAsked|id: PK\lservice_request_id: FK\lveterinarian_id: FK\ldate_asked: datetime\ldate_answered: datetime\laccepted: bool\l}", fillcolor="#EF9A9A"]

        vetreminder [label="{ScheduledVetReminder|id: PK\lvet_asked_id: FK\lscheduled_for: datetime\lprocessed_at: datetime\lstatus: pending/sent/...\lcelery_task_id: str\l}", fillcolor="#E57373"]

        payreminder [label="{PaymentReminder|id: PK\lservice_request_id: FK\lscheduled_for: datetime\lprocessed_at: datetime\lstatus: pending/sent/...\l}", fillcolor="#E57373"]
    }

    // === VET VISITS ===
    subgraph cluster_vetvisits {
        label="Veterinary Visits"
        style="rounded,filled"
        fillcolor="#FFFDE7"
        color="#F9A825"

        vetvisit [label="{VetVisit|id: PK\lservice_request_id: FK (opt)\lowner_id: FK\lveterinarian_id: FK\ldate: date\lhour: time\lvisit_type: clinical/\l          vaccination/\l          telemedicina\lvisit_state: PENDING/\l           IN_PROGRESS/\l           COMPLETED/\l           NO_REPORT/\l           CANCELLED\lreason: text\lobservations: text\lprice: decimal\ldeposit: decimal\lvet_fee: decimal\lpay_transaction: str\lgoogle_event_id: str\lafip_receipt_id: FK (opt)\l}", fillcolor="#FFF9C4"]

        vetvisitreport [label="{VetVisitReport|id: PK\lvisit_id: FK\lpet_id: FK\lreason: text\lphysical_exam: text\ldiagnosis: text\ltreatment: text\lpdf_file: file\l}", fillcolor="#FFF59D"]

        vetvisitfollowup [label="{VetVisitFollowUp|id: PK\lreport_id: FK\ldate: date\ldescription: text\l}", fillcolor="#FFF176"]

        vetvisitpetreason [label="{VetVisitPetReason|id: PK\lvisit_id: FK\lpet_id: FK\lreason: text\l}", fillcolor="#FFF176"]

        visit_pets [label="{M2M: Visit-Pets|vetvisit_id: FK\lpet_id: FK\l}", shape=diamond, fillcolor="#FFEE58"]
    }

    // === REFERENCE DATA ===
    subgraph cluster_reference {
        label="Reference Data"
        style="rounded,filled"
        fillcolor="#ECEFF1"
        color="#455A64"

        specialty [label="{Specialty|id: PK\lname: str\l}", fillcolor="#CFD8DC"]
        neighborhood [label="{Neighborhood|id: PK\lname: str\ldistance_coefficient: decimal\lcoverage_area: GIS Polygon\l}", fillcolor="#CFD8DC"]
        province [label="{Province|id: PK\lname: str\l}", fillcolor="#CFD8DC"]
        locality [label="{Locality|id: PK\lprovince_id: FK\lname: str\l}", fillcolor="#CFD8DC"]
        petbreed [label="{PetBreed|id: PK\lname: str\lpet_type: DOG/CAT\l}", fillcolor="#CFD8DC"]
        vaccine [label="{Vaccine|id: PK\lname: str\lpet_type: DOG/CAT\lperiodicity: int (months)\l}", fillcolor="#CFD8DC"]
        study [label="{Study|id: PK\lname: str\lpet_type: DOG/CAT\lgroup_id: FK (opt)\l}", fillcolor="#CFD8DC"]
        campaign [label="{Campaign|id: PK\lname: str\lutm_source: str\lutm_medium: str\lis_active: bool\l}", fillcolor="#CFD8DC"]
        tag [label="{Tag|id: PK\lname: str (unique)\l}", fillcolor="#CFD8DC"]
        medication [label="{Medication|id: PK\lname: str\lgeneral_name_id: FK\ltype_id: FK\lpresentation_id: FK\lpet_type: str\l}", fillcolor="#CFD8DC"]
        turnfeegroup [label="{IndividualTurnFeeGroup|id: PK\lname: str\lfee_percentage: decimal\l}", fillcolor="#CFD8DC"]
    }

    // === AFIP/INVOICING ===
    subgraph cluster_afip {
        label="AFIP Invoicing"
        style="rounded,filled"
        fillcolor="#FCE4EC"
        color="#AD1457"

        receipt [label="{Receipt|id: PK\ldocument_number: bigint\lreceipt_number: int\lissued_date: date\ltotal_amount: decimal\lnet_taxed: decimal\lcae: str\lcae_expiration: date\l}", fillcolor="#F8BBD9"]
    }

    // === RELATIONSHIPS ===

    // Auth -> PetOwner/Vet
    auth_user -> petowner [label="1:1 opt", style=dashed, color="#2E7D32"]
    auth_user -> veterinarian [label="1:1", color="#2E7D32"]

    // PetOwner relationships
    petowner -> pet [label="1:N owns", color="#1565C0"]
    petowner -> neighborhood [label="N:1 lives in", color="#1565C0"]
    petowner -> campaign [label="N:1 opt", style=dashed, color="#666"]
    petowner -> cart [label="1:N", color="#00838F"]
    petowner -> servicerequest [label="1:N requests", color="#C62828"]
    petowner -> vetvisit [label="1:N as owner", color="#F9A825"]

    // Pet relationships
    pet -> petbreed [label="N:1 opt", style=dashed, color="#666"]
    pet -> petvaccine [label="1:N", color="#1565C0"]
    pet -> petstudy [label="1:N", color="#1565C0"]
    petvaccine -> vaccine [label="N:1", color="#666"]
    petstudy -> study [label="N:1", color="#666"]

    // Veterinarian relationships
    veterinarian -> vet_specialty [label="1:N", color="#E65100"]
    vet_specialty -> specialty [label="N:1", color="#E65100"]
    veterinarian -> vet_neighborhood [label="1:N coverage", color="#E65100"]
    vet_neighborhood -> neighborhood [label="N:1", color="#E65100"]
    veterinarian -> availability [label="1:N", color="#E65100"]
    veterinarian -> unavailability [label="1:N", color="#E65100"]
    veterinarian -> turnfeegroup [label="N:M", color="#E65100", style=dashed]

    // Service/Pricing relationships
    grupo -> category [label="1:N", color="#7B1FA2"]
    category -> service [label="1:N", color="#7B1FA2"]
    service -> specialty [label="N:1 opt", style=dashed, color="#7B1FA2"]
    service -> prices [label="1:N", color="#7B1FA2"]
    service -> discounts [label="1:N", color="#7B1FA2"]
    prices -> veterinarian [label="N:1 opt\n(vet-specific)", style=dashed, color="#7B1FA2"]

    // Cart relationships
    cart -> veterinarian [label="N:1 opt\n(assigned vet)", style=dashed, color="#00838F"]
    cart -> cartitem [label="1:N", color="#00838F"]
    cart -> cartresumeitem [label="1:N", color="#00838F"]
    cart -> cartpetreason [label="1:N", color="#00838F"]
    cartitem -> service [label="N:1", color="#00838F"]
    cartitem -> pet [label="N:1 opt", style=dashed, color="#00838F"]
    cartpetreason -> pet [label="N:1", color="#00838F"]

    // ServiceRequest relationships
    servicerequest -> cart [label="1:1", color="#C62828"]
    servicerequest -> veterinarian [label="N:1 opt\n(assigned)", style=dashed, color="#C62828"]
    servicerequest -> statehistory [label="1:N audit", color="#C62828"]
    servicerequest -> vetasked [label="1:N", color="#C62828"]
    servicerequest -> payreminder [label="1:N", color="#C62828"]
    servicerequest -> campaign [label="N:1 opt", style=dashed, color="#666"]
    servicerequest -> tag [label="N:M", color="#666"]
    vetasked -> veterinarian [label="N:1", color="#C62828"]
    vetasked -> vetreminder [label="1:N", color="#C62828"]

    // VetVisit relationships
    vetvisit -> servicerequest [label="1:1 opt\n(from request)", style=dashed, color="#F9A825"]
    vetvisit -> veterinarian [label="N:1", color="#F9A825"]
    vetvisit -> visit_pets [label="1:N", color="#F9A825"]
    visit_pets -> pet [label="N:1", color="#F9A825"]
    vetvisit -> vetvisitreport [label="1:N", color="#F9A825"]
    vetvisit -> vetvisitpetreason [label="1:N", color="#F9A825"]
    vetvisitreport -> pet [label="N:1", color="#F9A825"]
    vetvisitreport -> vetvisitfollowup [label="1:N", color="#F9A825"]
    vetvisitpetreason -> pet [label="N:1", color="#F9A825"]

    // AFIP
    vetvisit -> receipt [label="1:1 opt\n(invoice)", style=dashed, color="#AD1457"]

    // Geography
    province -> locality [label="1:N", color="#666"]
}