from dataclasses import dataclass
from datetime import datetime
from typing import List, Optional

from pydantic import BaseModel


@dataclass
class Address:
    """Address information for tax calculations"""

    province: str
    city: str
    postal_code: str
    country: str = "Canada"


@dataclass
class Receipt:
    id: str
    file_name: str
    upload_date: datetime
    receipt_date: datetime
    amount: float
    tax: float
    vendor: str
    category: str
    description: str
    # Tax rule fields
    billing_address: Optional[Address] = None
    shipping_address: Optional[Address] = None
    currency: str = "CAD"
    is_meals_entertainment: bool = False


@dataclass
class Transaction:
    id: str
    transaction_date: datetime
    amount: float
    vendor: str
    notes: str
    # Tax rule fields
    currency: str = "CAD"
    fx_rate: Optional[float] = None
    source: Optional[str] = None  # e.g., "csv", "image", "manual", "api"

    # QuickBooks CSV fields
    TxnId: Optional[str] = None
    AccountType: Optional[str] = None
    AccountNumber: Optional[str] = None
    TransactionDate: Optional[str] = None
    TransactionType: Optional[str] = None
    ChequeNumber: Optional[str] = None
    Description1: Optional[str] = None
    Description2: Optional[str] = None
    VendorId: Optional[str] = None
    VendorName: Optional[str] = None
    AccountId: Optional[str] = None
    AccountName: Optional[str] = None


@dataclass
class Asset:
    """Asset for depreciation calculations"""

    id: str
    name: str
    purchase_date: datetime
    purchase_amount: float
    useful_life_years: int
    residual_value: float
    cca_rate: float  # Capital Cost Allowance rate
    asset_class: str


@dataclass
class Match:
    receipt: Receipt
    transaction: Transaction
    confidence_score: float
    match_reason: str
    tax_analysis: Optional[dict] = None


class AddressRequest(BaseModel):
    province: str
    city: str
    postal_code: str
    country: str = "Canada"


class ReceiptRequest(BaseModel):
    id: str
    file_name: str
    upload_date: datetime
    receipt_date: datetime
    amount: float
    tax: float
    vendor: str
    category: str
    description: str
    # Tax rule fields
    billing_address: Optional[AddressRequest] = None
    shipping_address: Optional[AddressRequest] = None
    currency: str = "CAD"
    is_meals_entertainment: bool = False


class TransactionRequest(BaseModel):
    id: str
    transaction_date: datetime
    amount: float
    vendor: str
    notes: str
    # Tax rule fields
    currency: str = "CAD"
    fx_rate: Optional[float] = None
    source: Optional[str] = None  # e.g., "csv", "image", "manual", "api"

    # QuickBooks CSV fields
    TxnId: Optional[str] = None
    AccountType: Optional[str] = None
    AccountNumber: Optional[str] = None
    TransactionDate: Optional[str] = None
    TransactionType: Optional[str] = None
    ChequeNumber: Optional[str] = None
    Description1: Optional[str] = None
    Description2: Optional[str] = None
    VendorId: Optional[str] = None
    VendorName: Optional[str] = None
    AccountId: Optional[str] = None
    AccountName: Optional[str] = None


class AssetRequest(BaseModel):
    id: str
    name: str
    purchase_date: datetime
    purchase_amount: float
    useful_life_years: int
    residual_value: float
    cca_rate: float
    asset_class: str


class MatchingRequest(BaseModel):
    receipt_ids: List[str]
    transaction_ids: List[str]


class MatchResponse(BaseModel):
    receipt_id: str
    transaction_id: str
    confidence_score: float
    match_reason: str
    receipt_vendor: str
    receipt_amount: float
    receipt_description: str
    receipt_category: str
    receipt_tax_amount: float
    transaction_vendor: str
    transaction_amount: float
    tax_analysis: Optional[dict] = None
    flag_for_review: Optional[bool] = None
    auto_approve: Optional[bool] = None

    # Transaction metadata
    transaction_source: Optional[str] = None  # Source of the transaction

    # QuickBooks CSV fields from transaction
    TxnId: Optional[str] = None
    AccountType: Optional[str] = None
    AccountNumber: Optional[str] = None
    TransactionDate: Optional[str] = None
    TransactionType: Optional[str] = None
    ChequeNumber: Optional[str] = None
    Description1: Optional[str] = None
    Description2: Optional[str] = None
    VendorId: Optional[str] = None
    VendorName: Optional[str] = None
    AccountId: Optional[str] = None
    AccountName: Optional[str] = None
    Source: Optional[str] = None


class MatchingResponse(BaseModel):
    matches: List[MatchResponse]
    stats: dict


class ApprovalRequest(BaseModel):
    match_id: str
    approved: bool
    reason: Optional[str] = None


class RuleRequest(BaseModel):
    name: str
    condition: str
    action: str
    source: str = "user"


class DocumentUploadResponse(BaseModel):
    file_id: str
    filename: str
    file_type: str
    upload_date: datetime
    status: str


class AIRules(BaseModel):
    condition: str
    action: str


class DocumentProcessRequest(BaseModel):
    file_id: Optional[str] = None
    user_location: Optional[str] = (
        None  # Format: "State/Province, Country" (e.g., "Ontario, Canada")
    )
    ai_rules: Optional[List[AIRules]] = None


class DocumentProcessResponse(BaseModel):
    file_id: str
    receipt_id: str
    extraction_success: bool
    vendor: Optional[str] = None
    description: Optional[str] = None
    total_amount: Optional[float] = None
    tax_amount: Optional[float] = None
    date: Optional[str] = None
    category: Optional[str] = None
    confidence: Optional[float] = None
    error: Optional[str] = None
    receipt_currency: Optional[str] = "CAD"
    receipt_location: Optional[str] = (
        None  # Location from receipt (e.g., "Ontario, Canada" or "California, USA")
    )
    calculated_tax: Optional[float] = None  # Calculated sales tax if not clearly shown
    is_depreciable: Optional[bool] = None  # Whether item is a depreciable asset
    name_of_asset: Optional[str] = None  # Name/description of the asset if depreciable
    cca_rate: Optional[float] = (
        None  # CCA rate for tax depreciation (e.g., 0.30 for 30%)
    )
    useful_life: Optional[int] = (
        None  # Useful life in years for straight-line depreciation
    )
    residual_value: Optional[float] = (
        None  # Residual value for straight-line depreciation
    )


# New tax-related models
class TaxCalculationRequest(BaseModel):
    receipt_id: str
    transaction_id: Optional[str] = None


class TaxCalculationResponse(BaseModel):
    receipt_id: str
    rules_applied: List[str]
    sales_tax: dict
    fx_analysis: Optional[dict] = None
    meals_entertainment: dict


class DepreciationRequest(BaseModel):
    asset: AssetRequest
    year: int
    method: str  # "straight_line" or "cca"


class DepreciationResponse(BaseModel):
    asset_id: str
    year: int
    method: str
    depreciation: float
    book_value: float
    total_depreciation: Optional[float] = None
    success: bool
    error: Optional[str] = None


class CityInfo(BaseModel):
    """City information from user tax info"""

    id: int
    name: str
    state_id: int
    state_code: str
    country_id: int
    country_code: str
    latitude: Optional[str] = None
    longitude: Optional[str] = None


class StateInfo(BaseModel):
    """State/Province information from user tax info"""

    id: int
    name: str
    country_id: int
    country_code: str
    state_code: str


class CountryInfo(BaseModel):
    """Country information from user tax info"""

    id: int
    name: str
    iso3: str
    iso2: str
    phone_code: str
    capital: str
    currency: str
    native: Optional[str] = None
    region: Optional[str] = None
    subregion: Optional[str] = None
    emoji: Optional[str] = None
    emojiU: Optional[str] = None


class UserTaxInfo(BaseModel):
    """User tax information for location-based tax calculations"""

    id: int
    user_id: int
    company_name: str
    tax_id: Optional[str] = ""
    tax_id_type: Optional[str] = "EIN"
    address_line_1: Optional[str] = ""
    address_line_2: Optional[str] = ""
    city: CityInfo
    state: StateInfo
    zip_postal_code: Optional[str] = ""
    country: CountryInfo
    include_on_invoices: Optional[int] = 1
    created_at: Optional[str] = None
    updated_at: Optional[str] = None


class MatchSpecificRequest(BaseModel):
    file_ids: List[str]
    categorization_id: str
    user_location: Optional[str] = "Canada"  # Kept for backward compatibility
    user_tax_info: Optional[UserTaxInfo] = None
    ai_rules: Optional[List[AIRules]] = None