from datetime import date, datetime
from decimal import Decimal
from typing import Any, Dict, List, Literal, Optional

from pydantic import BaseModel, Field


ALSO_SOURCE_TYPES = Literal["api", "xml", "json_export", "xml_export", "csv", "xlsx_export"]
ALSO_QUEUE_STATUSES = Literal[
    "new",
    "matching_products",
    "matching_customers",
    "ready_for_approval",
    "approved",
    "invoiced",
    "error",
]


class AlsoImportJobCreate(BaseModel):
    source_type: ALSO_SOURCE_TYPES
    source_label: Optional[str] = None
    file_name: Optional[str] = None
    import_version: Optional[str] = None
    raw_payload: Dict[str, Any] = Field(default_factory=dict)


class AlsoImportLineInput(BaseModel):
    line_no: Optional[int] = None
    source_line_ref: Optional[str] = None

    company: Optional[str] = None
    customer_id: Optional[str] = None
    account_id: Optional[str] = None
    vat: Optional[str] = None
    also_company_id: Optional[str] = None

    material_number: Optional[str] = None
    product_name: Optional[str] = None
    vendor: Optional[str] = None

    cost_amount: Optional[Decimal] = None
    sales_price: Optional[Decimal] = None
    unit_price: Optional[Decimal] = None
    total_price: Optional[Decimal] = None
    currency: Optional[str] = None

    billing_start: Optional[date] = None
    charge_interval: Optional[str] = None
    billing_interval: Optional[str] = None

    billable_parameters: Optional[Decimal] = None
    queue_status: ALSO_QUEUE_STATUSES = "new"
    raw_line: Dict[str, Any] = Field(default_factory=dict)


class AlsoImportLinesRequest(BaseModel):
    lines: List[AlsoImportLineInput] = Field(default_factory=list)


class AlsoQueueProcessRequest(BaseModel):
    import_job_id: Optional[int] = Field(default=None, gt=0)
    line_ids: List[int] = Field(default_factory=list)
    limit: int = Field(default=500, ge=1, le=5000)


class AlsoQueueApproveRequest(BaseModel):
    import_job_id: Optional[int] = Field(default=None, gt=0)
    line_ids: List[int] = Field(default_factory=list)


class AlsoQueueProcessResult(BaseModel):
    processed: int
    updated: int
    ready_for_approval: int
    errored: int


class AlsoApproveResult(BaseModel):
    approved_lines: int
    created_drafts: int
    draft_ids: List[int] = Field(default_factory=list)


class AlsoCompanyMappingUpsert(BaseModel):
    also_company_id: str = Field(min_length=1)
    also_customer_id: Optional[str] = None
    customer_id: int = Field(gt=0)
    match_confidence: Optional[Decimal] = None
    notes: Optional[str] = None


class AlsoProductMappingUpsert(BaseModel):
    material_number: str = Field(min_length=1)
    vendor: str = Field(min_length=1)
    hub_product_id: int = Field(gt=0)
    product_name_snapshot: Optional[str] = None


class AlsoManualCompanyMapRequest(BaseModel):
    customer_id: int = Field(gt=0)
    notes: Optional[str] = None


class AlsoManualProductMapRequest(BaseModel):
    product_id: int = Field(gt=0)
    notes: Optional[str] = None


class AlsoImportJobResponse(BaseModel):
    id: int
    source_type: str
    source_label: Optional[str] = None
    status: str
    file_name: Optional[str] = None
    import_version: Optional[str] = None
    imported_by_user_id: Optional[int] = None
    imported_at: datetime
    line_count: int = 0


class AlsoQueueLineResponse(BaseModel):
    id: int
    import_job_id: int
    queue_status: str
    company: Optional[str] = None
    customer_id: Optional[str] = None
    material_number: Optional[str] = None
    product_name: Optional[str] = None
    vendor: Optional[str] = None
    total_price: Optional[Decimal] = None
    cost_amount: Optional[Decimal] = None
    effective_cost_amount: Optional[Decimal] = None
    effective_margin_amount: Optional[Decimal] = None
    currency: Optional[str] = None
    matched_customer_id: Optional[int] = None
    matched_product_id: Optional[int] = None
    order_draft_id: Optional[int] = None
    validation_errors_json: List[Dict[str, Any]] = Field(default_factory=list)


class AlsoDashboardSummaryResponse(BaseModel):
    monthly_revenue: Decimal
    monthly_cost: Decimal
    monthly_margin: Decimal
    unmatched_products: int
    unmatched_customers: int
    pending_approvals: int
    invoiced_customers: int


class AlsoDifferenceItem(BaseModel):
    customer_id: Optional[int] = None
    customer_name: Optional[str] = None
    material_number: Optional[str] = None
    product_name: Optional[str] = None
    vendor: Optional[str] = None
    previous_month_qty: Decimal
    current_month_qty: Decimal
    change_percent: Optional[Decimal] = None
    warning: bool = False