from typing import Optional

from pydantic import BaseModel, ConfigDict, Field, field_validator
from pydantic.alias_generators import to_camel

from app.schemas.bx.common import DatetimeToStr, OptDatetimeToStr


def _coerce_optional_id(value):
    if value is None:
        return None
    s = str(value).strip()
    return s or None


class AdvanceApplyCreate(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    reason: str
    purpose: Optional[str] = None
    amount: float
    remark: Optional[str] = None
    expense_item_id: Optional[str] = None

    @field_validator("expense_item_id", mode="before")
    @classmethod
    def validate_expense_item_id(cls, value):
        return _coerce_optional_id(value)


class AdvanceApplyUpdate(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    reason: Optional[str] = None
    purpose: Optional[str] = None
    amount: Optional[float] = None
    remark: Optional[str] = None
    expense_item_id: Optional[str] = None

    @field_validator("expense_item_id", mode="before")
    @classmethod
    def validate_expense_item_id(cls, value):
        return _coerce_optional_id(value)


class AdvanceApplyOut(BaseModel):
    model_config = ConfigDict(from_attributes=True, populate_by_name=True, alias_generator=to_camel)

    id: str
    apply_code: str
    applicant_id: str
    applicant_name: str
    reason: str
    purpose: Optional[str] = None
    expense_item_id: Optional[str] = None
    amount: float
    status: str
    current_node: Optional[str] = None
    apply_time: DatetimeToStr = Field(validation_alias="create_time")
    create_by: Optional[str] = Field(default=None, validation_alias="create_by")
    remark: Optional[str] = None
    actual_amount: Optional[float] = None
    offset_amount: Optional[float] = None
    issue_status: Optional[str] = None
    issue_time: OptDatetimeToStr = None
    issue_user_name: Optional[str] = None
    issue_remark: Optional[str] = None


class AdvanceApprovalCreate(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    approval_status: Optional[str] = None
    approval_opinion: Optional[str] = None


class AdvanceApprovalOut(BaseModel):
    model_config = ConfigDict(from_attributes=True, populate_by_name=True, alias_generator=to_camel)

    id: str
    advance_id: str
    node_name: str
    node_order: int
    approval_status: str
    approval_opinion: Optional[str] = None
    approver_name: str
    approval_time: OptDatetimeToStr = None


class AdvanceMyStatsOut(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    total_count: int
    pending_count: int
    approved_pass_count: int
    rejected_count: int
    pending_issue_count: int
    issued_count: int
    issued_amount: float
    month_apply_amount: float
    month_apply_count: int
    offset_total: float


class AdvanceApproverPendingStatsOut(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    pending_total: int
    month_pending_amount: float


class AdvanceIssueOut(BaseModel):
    model_config = ConfigDict(from_attributes=True, populate_by_name=True, alias_generator=to_camel)

    id: str
    apply_code: str
    applicant_id: str
    applicant_name: str
    reason: str
    amount: float
    apply_time: DatetimeToStr = Field(validation_alias="create_time")
    approve_time: DatetimeToStr = Field(validation_alias="update_time")
    issue_status: Optional[str] = None
    issue_time: OptDatetimeToStr = None
    issue_user_name: Optional[str] = None
    issue_remark: Optional[str] = None
    actual_amount: Optional[float] = None
    offset_amount: Optional[float] = None


class AdvanceIssueRequest(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    issue_remark: Optional[str] = None
    actual_amount: Optional[float] = None


class AdvanceOffsetRecordOut(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    reimburse_id: str
    reimburse_apply_code: str
    reimburse_title: Optional[str] = None
    reimburse_applicant_name: Optional[str] = None
    offset_amount: float
    remark: Optional[str] = None
    operator: Optional[str] = None
    create_time: OptDatetimeToStr = None


class AdvanceFinanceIssueStatsOut(BaseModel):
    model_config = ConfigDict(populate_by_name=True, alias_generator=to_camel)

    pending_count: int
    issued_count: int
    pending_amount: float
    issued_month_amount: float