import re
from decimal import Decimal
from typing import Literal
from uuid import UUID
from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator

class StrictModel(BaseModel):
    model_config = ConfigDict(extra='forbid', allow_inf_nan=False)

class Customer(StrictModel):
    cnpj: str
    zap: str
    mail: str = Field(max_length=254)

    @field_validator('cnpj')
    @classmethod
    def cnpj_valid(cls, value):
        digits = re.sub(r'\D', '', value)
        if len(digits) != 14 or len(set(digits)) == 1 or not digits.isascii():
            raise ValueError('Invalid CNPJ')
        def check(base, weights):
            rem = sum(int(n) * w for n,w in zip(base, weights)) % 11
            return 0 if rem < 2 else 11-rem
        if check(digits[:12], [5,4,3,2,9,8,7,6,5,4,3,2]) != int(digits[12]) or check(digits[:13], [6,5,4,3,2,9,8,7,6,5,4,3,2]) != int(digits[13]):
            raise ValueError('Invalid CNPJ')
        return digits

    @field_validator('zap')
    @classmethod
    def phone_valid(cls, value):
        digits = re.sub(r'\D', '', value)
        if len(digits) not in (10,11) or not digits.isascii():
            raise ValueError('Invalid phone')
        return digits

    @field_validator('mail')
    @classmethod
    def email_valid(cls, value):
        if not re.fullmatch(r'[^\s@]+@[^\s@]+\.[a-zA-Z]{2,}', value.strip()):
            raise ValueError('Invalid email')
        return value.strip()

class Freight(StrictModel):
    service: Literal['pickup','mock-standard','jadlog'] = 'pickup'
    postal_code: str = Field(default='', max_length=8)

class FreightEstimate(Freight):
    """The cart's estimate. The charged freight is quoted again by the server
    from the approved items, never from these numbers."""
    metres: Decimal | None = Field(default=None, gt=0, le=12000)
    declared_cents: int = Field(default=0, ge=0, le=100_000_000, strict=True)

UF = Literal['AC','AL','AP','AM','BA','CE','DF','ES','GO','MA','MT','MS','MG','PA','PB',
             'PR','PE','PI','RJ','RN','RS','RO','RR','SC','SP','SE','TO']

class Destination(StrictModel):
    """Where a shipped order goes. A CEP alone quotes freight; it does not deliver."""
    recipient: str = Field(min_length=2, max_length=120)
    street: str = Field(min_length=2, max_length=160)
    number: str = Field(min_length=1, max_length=20)
    complement: str = Field(default='', max_length=80)
    district: str = Field(min_length=2, max_length=80)
    city: str = Field(min_length=2, max_length=80)
    state: UF
    postal_code: str = Field(pattern=r'^[0-9]{8}$')

    @field_validator('recipient', 'street', 'number', 'complement', 'district', 'city', mode='before')
    @classmethod
    def trimmed(cls, value):
        if isinstance(value, str):
            value = ' '.join(value.split())
            if any(ord(ch) < 32 for ch in value):
                raise ValueError('Invalid characters')
        return value

class UploadStart(StrictModel):
    name: str = Field(min_length=1, max_length=200, pattern=r'^[^/\\\x00-\x1f]+$')
    size: int = Field(gt=0, strict=True)

    @field_validator('name')
    @classmethod
    def artwork_extension(cls, value):
        # Union of existing Site product formats; this is NOT malware/pre-flight validation.
        if not re.search(r'\.(png|jpe?g|webp|tiff?|pdf|psd|psb|ai|cdr)$', value, re.I):
            raise ValueError('Unsupported artwork file extension')
        return value

class ProductionSource(StrictModel):
    upload_id: UUID
    kind: Literal['sheet', 'artwork']
    width_cm: Decimal = Field(gt=0, le=57)
    length_cm: Decimal = Field(gt=0, le=6000)
    copies: int = Field(ge=1, le=200, strict=True)
    rotation_degrees: Literal[0, 90] = 0
    mirrored: bool = False
    measurement: Literal['file', 'customer']

class ProductionPlacement(StrictModel):
    source_index: int = Field(ge=0, le=19, strict=True)
    copy_index: int = Field(ge=0, le=199, strict=True)
    x_cm: Decimal = Field(ge=0, le=57)
    y_cm: Decimal = Field(ge=0, le=1200000)
    width_cm: Decimal = Field(gt=0, le=57)
    length_cm: Decimal = Field(gt=0, le=6000)
    rotation_degrees: Literal[0, 90, 180, 270]
    mirrored: bool

class ProductionSpec(StrictModel):
    version: Literal[2]
    film_width_cm: Decimal
    height_cm: Decimal = Field(gt=0, le=1200000)
    sources: list[ProductionSource] = Field(min_length=1, max_length=20)
    placements: list[ProductionPlacement] = Field(min_length=1, max_length=4000)

class Item(StrictModel):
    mode: Literal['file','avulsa','uvfile','uv']
    metres: Decimal = Field(gt=0, le=12000)
    grade: int = Field(ge=0, le=100, strict=True)
    uploads: list[UUID] = Field(min_length=1, max_length=20)
    production: ProductionSpec
    quality_status: Literal['ok', 'warning', 'unverified']
    quality_acknowledged: bool

    @model_validator(mode='after')
    def production_matches_uploads(self):
        if [source.upload_id for source in self.production.sources] != self.uploads:
            raise ValueError('Production sources must match uploaded files in order')
        is_sheet = self.mode in ('file', 'uvfile')
        film_width = Decimal('28.5') if self.mode in ('uvfile', 'uv') else Decimal('57')
        if self.production.film_width_cm != film_width:
            raise ValueError('Production film width does not match the product')
        for source in self.production.sources:
            if (source.kind == 'sheet') != is_sheet or source.width_cm > film_width:
                raise ValueError('Production source does not fit the selected product')
            if is_sheet and (source.rotation_degrees or source.mirrored):
                raise ValueError('Finished sheets cannot be rotated or mirrored by the layout')
        expected={(index,copy) for index,source in enumerate(self.production.sources)
                  for copy in range(source.copies)}
        placed=set()
        tolerance=Decimal('0.02')
        for placement in self.production.placements:
            key=(placement.source_index,placement.copy_index)
            if key not in expected or key in placed:
                raise ValueError('Production placement has a missing or duplicate source copy')
            placed.add(key)
            source=self.production.sources[placement.source_index]
            auto_rotation=(placement.rotation_degrees-source.rotation_degrees)%360
            if auto_rotation not in (0,90) or placement.mirrored != source.mirrored:
                raise ValueError('Production placement changes the source transform')
            width,length=(source.width_cm,source.length_cm) if auto_rotation==0 else (source.length_cm,source.width_cm)
            if abs(placement.width_cm-width)>tolerance or abs(placement.length_cm-length)>tolerance:
                raise ValueError('Production placement changes the source size')
            if placement.x_cm+placement.width_cm>film_width+tolerance or placement.y_cm+placement.length_cm>self.production.height_cm+tolerance:
                raise ValueError('Production placement is outside the film')
            if is_sheet and (placement.x_cm or auto_rotation):
                raise ValueError('Finished sheets must retain their original orientation')
        if placed != expected:
            raise ValueError('Production layout does not cover every source copy')
        if self.quality_status == 'warning' and not self.quality_acknowledged:
            raise ValueError('Resolution warning must be acknowledged')
        return self

class QuoteRequest(StrictModel):
    request_key: UUID
    customer: Customer
    items: list[Item] = Field(min_length=1, max_length=30)
    freight: Freight
    destination: Destination | None = None

    @model_validator(mode='after')
    def destination_matches_freight(self):
        if self.freight.service == 'pickup':
            if self.destination is not None:
                raise ValueError('Pickup orders do not take a delivery address')
        elif self.destination is None:
            raise ValueError('Delivery requires the full address')
        elif self.destination.postal_code != self.freight.postal_code:
            raise ValueError('The delivery address CEP must be the CEP freight was quoted for')
        return self

class Review(StrictModel):
    items: list[Item] = Field(min_length=1, max_length=30)

class Pay(StrictModel):
    quote_id: UUID

class PaymentMethod(StrictModel):
    type: Literal['pix', 'card']
    # Card fields come from the provider's own form, which tokenises the card
    # in the browser; the number never reaches this server.
    token: str | None = Field(default=None, max_length=200)
    payment_method_id: str | None = Field(default=None, max_length=40, pattern=r'^[a-z_]+$')
    installments: int = Field(default=1, ge=1, le=12, strict=True)
    issuer_id: str | None = Field(default=None, max_length=40)
    # The cardholder's document from the card form: for a card, the payer is
    # the cardholder, not necessarily the company on the invoice.
    payer_document_type: Literal['CPF', 'CNPJ'] | None = None
    payer_document: str | None = Field(default=None, pattern=r'^[0-9]{11,14}$')

    @model_validator(mode='after')
    def card_needs_token(self):
        if self.type == 'card' and not (self.token and self.payment_method_id):
            raise ValueError('Card payment requires the provider token and method')
        return self

class PaymentIntent(StrictModel):
    quote_id: UUID
    method: PaymentMethod

class Move(StrictModel):
    state: Literal['rec','tra','fil','imp','cor','fin']
    version: int = Field(ge=0)
    reason: str = Field(default='', max_length=1000)

class Resolution(StrictModel):
    note: str = Field(min_length=3, max_length=1000)

class Register(StrictModel):
    customer: Customer
    password: str = Field(min_length=12, max_length=128)

class ProfileUpdate(StrictModel):
    """What a customer may change about their account; the CNPJ is not among it."""
    zap: str
    address: Destination | None = None

    @field_validator('zap')
    @classmethod
    def phone_valid(cls, value):
        digits = re.sub(r'\D', '', value)
        if len(digits) not in (10,11) or not digits.isascii():
            raise ValueError('Invalid phone')
        return digits

class EmailChange(StrictModel):
    email: str = Field(max_length=254)
    password: str = Field(min_length=1, max_length=128)

    @field_validator('email')
    @classmethod
    def email_valid(cls, value):
        value = value.strip().lower()
        if not re.fullmatch(r'[^\s@]+@[^\s@]+\.[a-zA-Z]{2,}', value):
            raise ValueError('Invalid email')
        return value

class PasswordChange(StrictModel):
    current: str = Field(min_length=1, max_length=128)
    new: str = Field(min_length=12, max_length=128)

class Login(StrictModel):
    email: str = Field(min_length=3, max_length=254)
    password: str = Field(min_length=1, max_length=128)

class OperatorLogin(StrictModel):
    email: str = Field(min_length=3, max_length=254)
    password: str = Field(min_length=1, max_length=128)

    @field_validator('email')
    @classmethod
    def operator_email_valid(cls, value):
        value = value.strip().lower()
        if not re.fullmatch(r'[^\s@]+@[^\s@]+\.[a-zA-Z]{2,}', value):
            raise ValueError('Invalid email')
        return value

class FileReference(StrictModel):
    upload_id: UUID
    item_index: int = Field(ge=0, strict=True)

class ArtworkSubmission(StrictModel):
    version: int = Field(ge=0, strict=True)
    files: list[FileReference] = Field(min_length=1, max_length=60)
    note: str = Field(min_length=1, max_length=1000)