from python_anvil.api import Anvil
from python_anvil.api_resources.mutations.create_etch_packet import CreateEtchPacket
from python_anvil.api_resources.payload import (
    EtchSigner,
    SignerField,
    DocumentUpload,
    EtchCastRef,
    SignatureField,
    FillPDFPayload,
)

API_KEY = 'your_api_key_here'

anvil = Anvil(api_key=API_KEY)

# Create an instance of the builder
packet = CreateEtchPacket(
    name="Packet Name",
    signature_email_subject="Please sign these forms",
)

# Gather your signer data
signer1 = EtchSigner(
    name="Jackie",
    email="jackie@example.com",
    # Fields where the signer needs to sign
    # Check your cast fields via the CLI (`anvil cast [cast_eid]`) or the
    # PDF Templates section on the Anvil app.
    # This basically says: "In the 'introPages' file (defined as
    # `pdf_template` above), assign the signature field with cast id of
    # 'def456' to this signer." You can add multiple signer fields here.
    fields=[SignerField(
        file_id="fileAlias",
        field_id="signOne",
    )],
    # By default, `signer_type` will be "email" which will automatically
    # send emails when this etch packet is created.
    # It can also be set to "embedded" which will _not_ send emails, and
    # you will need to handle sending the signer URLs manually in some way.
    signer_type="email",
    #
    # You can also change how signatures will be collected.
    # "draw" will allow the signer to draw their signature
    # "text" will insert a text version of the signer's name into the
    # signature field.
    signature_mode="draw",
    #
    # Whether or not to the signer is required to click each signature
    # field manually. If `False`, the PDF will be signed once the signer
    # accepts the PDF without making the user go through the PDF.
    accept_each_field=False,
    #
    # URL of where the signer will be redirected after signing.
    # The URL will also have certain URL params added on, so the page
    # can be customized based on the signing action.
    redirect_url="https://app.useanvil.com",
)

# Add your signer. This could also be done when the `Anvil` class is
# instantiated with `Anvil(..., signers=[signer1])`.
packet.add_signer(signer1)

# Create the files you want the signer to sign
file1 = DocumentUpload(
    id="myNewFile",
    title="Please sign this important form",
    # A base64 encoded pdf should be here.
    # Currently, this library does not do this for you, so make sure that
    # the file data is ready at this point.
    file="BASE64 ENCODED DATA HERE",
    fields=[SignatureField(
        id="firstSignature",
        type="signature",
        page_num=0,
        # The position and size of the field
        rect=dict(x=100, y=100, width=100, height=100)
    )]
)

# You can reference an existing PDF Template from your Anvil account
# instead of uploading a new file.
# You can find this information by going to the "PDF Templates" section of
# your Anvil account, choosing a template, and selecting "API Info" at the
# top-right of the page.
# Additionally, you can get this information by using the provided CLI by:
# `anvil cast --list` to list all your available templates, then:
# `anvil cast [THE_EID_OF_THE_CAST]` to get a listing of data in that
# template.
file2 = EtchCastRef(
    # The `id` here is what should be used by signer objects above.
    # This can be any string, but should be unique if adding multiple files.
    id="fileAlias",
    # The eid of the cast you want to use from "API Info" or through the CLI
    cast_eid="CAST_EID_GOES_HERE"
)

# Add files to your payload
packet.add_file(file1)
packet.add_file(file2)

# Optionally, you can pre-fill fields in the PDFs you've used above.
# This reuses the payload shape used when using the `fill_pdf` method.
packet.add_file_payloads("fileAlias", FillPDFPayload(data={
    "aTextFieldId": "This is pre-filled."
}))

anvil.create_etch_packet(payload=packet)