from typing import Optional, List
from pydantic import BaseModel, Field, EmailStr, field_validator, model_validator


class InvoiceHeaderCreate(BaseModel):
    company_name: str = Field(..., min_length=1, max_length=128)
    tax_number: str = Field(..., min_length=1, max_length=32)
    register_address: Optional[str] = Field(None, min_length=1, max_length=256)
    register_phone: Optional[str] = Field(None, min_length=1, max_length=32)
    bank_name: Optional[str] = Field(None, min_length=1, max_length=128)
    bank_account: Optional[str] = Field(None, min_length=1, max_length=64)
    email: EmailStr
    is_default: Optional[bool] = False


class InvoiceHeaderOut(BaseModel):
    id: int
    app_user_id: Optional[int] = None
    company_name: str
    tax_number: str
    register_address: str
    register_phone: str
    bank_name: str
    bank_account: str
    email: EmailStr
    class Config:
        from_attributes = True
    is_default: Optional[bool] = False


class InvoiceHeaderUpdate(BaseModel):
    company_name: Optional[str] = Field(None, min_length=1, max_length=128)
    tax_number: Optional[str] = Field(None, min_length=1, max_length=32)
    register_address: Optional[str] = Field(None, max_length=256)
    register_phone: Optional[str] = Field(None, max_length=32)
    bank_name: Optional[str] = Field(None, max_length=128)
    bank_account: Optional[str] = Field(None, max_length=64)
    email: Optional[EmailStr] = None
    is_default: Optional[bool] = None


class InvoiceCreate(BaseModel):
    ticket_type: str = Field(..., pattern=r"^(electronic|paper)$")
    invoice_type: str = Field(..., pattern=r"^(special|normal)$")
    phone: str = Field(..., min_length=5, max_length=20)
    email: EmailStr
    company_name: str = Field(..., min_length=1, max_length=128)
    tax_number: str = Field(..., min_length=1, max_length=32)
    register_address: str = Field(..., max_length=256)
    register_phone: str = Field(..., max_length=32)
    bank_name: str = Field(..., max_length=128)
    bank_account: str = Field(..., max_length=64)
    app_user_id: Optional[int] = None
    header_id: Optional[int] = None
    wechat: Optional[str] = None


class InvoiceUpdate(BaseModel):
    ticket_type: Optional[str] = Field(None, pattern=r"^(electronic|paper)$")
    invoice_type: Optional[str] = Field(None, pattern=r"^(special|normal)$")
    phone: Optional[str] = Field(None, min_length=5, max_length=20)
    email: Optional[EmailStr] = None
    company_name: Optional[str] = Field(None, min_length=1, max_length=128)
    tax_number: Optional[str] = Field(None, min_length=1, max_length=32)
    register_address: Optional[str] = Field(None, min_length=1, max_length=256)
    register_phone: Optional[str] = Field(None, min_length=1, max_length=32)
    bank_name: Optional[str] = Field(None, min_length=1, max_length=128)
    bank_account: Optional[str] = Field(None, min_length=1, max_length=64)
    wechat: Optional[str] = None


class InvoiceOut(BaseModel):
    id: int
    created_at: str
    ticket_type: str
    invoice_type: str
    phone: str
    email: EmailStr
    company_name: str
    tax_number: str
    register_address: str
    register_phone: str
    bank_name: str
    bank_account: str
    status: str
    app_user_id: Optional[int]
    header_id: Optional[int]
    wechat: Optional[str]


class InvoiceList(BaseModel):
    items: List[InvoiceOut]
    total: int
    page: int
    page_size: int


class UpdateStatus(BaseModel):
    id: int
    status: str = Field(..., pattern=r"^(pending|invoiced|rejected|refunded)$")


class UpdateType(BaseModel):
    ticket_type: str = Field(..., pattern=r"^(electronic|paper)$")
    invoice_type: str = Field(..., pattern=r"^(special|normal)$")


class PaymentReceiptCreate(BaseModel):
    url: str = Field(..., min_length=1, max_length=512)
    note: Optional[str] = Field(None, max_length=256)
    extra: Optional[dict] = None


class PaymentReceiptOut(BaseModel):
    id: int
    url: str
    note: Optional[str]
    verified: bool
    created_at: str
    extra: Optional[dict] = None


class AppCreateInvoiceWithReceipt(BaseModel):
    header_id: int
    ticket_type: Optional[str] = Field(None, pattern=r"^(electronic|paper)$")
    invoice_type: Optional[str] = Field(None, pattern=r"^(special|normal)$")
    # 兼容前端索引字段："0"→normal，"1"→special
    invoiceTypeIndex: Optional[str] = None
    receipt_url: Optional[str] = Field(None, max_length=512)
    note: Optional[str] = Field(None, max_length=256)

    @field_validator('ticket_type', mode='before')
    @classmethod
    def _default_ticket_type(cls, v):
        return v or 'electronic'

    @field_validator('receipt_url', mode='before')
    @classmethod
    def _clean_receipt_url(cls, v):
        if isinstance(v, list) and v:
            v = v[0]
        if isinstance(v, str):
            s = v.strip()
            if s.startswith('`') and s.endswith('`'):
                s = s[1:-1].strip()
            return s or None
        return v

    @model_validator(mode='after')
    def _coerce_invoice_type(self):
        if not self.invoice_type and self.invoiceTypeIndex is not None:
            mapping = {'0': 'normal', '1': 'special'}
            self.invoice_type = mapping.get(str(self.invoiceTypeIndex))
        # 若仍为空，默认 normal
        if not self.invoice_type:
            self.invoice_type = 'normal'
        return self