"""Schemas for v1 (Consumer-Driven Contract) API endpoints."""

from __future__ import annotations

from datetime import date, datetime
from decimal import Decimal
from typing import Any, Literal

from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator


# ---------------------------------------------------------------------------
# GET/POST/PATCH /v1/tags (REQ-004)
# ---------------------------------------------------------------------------

class TagItem(BaseModel):
    tag_id: str
    name: str
    is_admin_tag: bool
    is_active: bool
    created_at: datetime | None = None


class TagCreateRequest(BaseModel):
    name: str = Field(..., min_length=1)


class TagListResponse(BaseModel):
    tags: list[TagItem]
    total: int


# ---------------------------------------------------------------------------
# POST/DELETE /v1/assets/{id}/tags, /v1/portfolios/{id}/tags (REQ-005)
# ---------------------------------------------------------------------------

class TagApplyRequest(BaseModel):
    tag_id: str = Field(..., min_length=1)


class TagApplyResponse(BaseModel):
    tag_id: str
    status: str


# ---------------------------------------------------------------------------
# GET /v1/assets
# ---------------------------------------------------------------------------

class TagRefItem(BaseModel):
    tag_id: str
    archived: bool = False


class AssetItem(BaseModel):
    asset_id: str
    symbol: str
    status: str
    cash: float
    quantity: float
    broker_type: str
    strategy_id: str | None = None
    strategy_type: str | None = None
    strategy_params: dict[str, Any] = {}
    updated_at: datetime | None = None
    # Additional informational fields
    name: str | None = None
    price: float | None = None
    profit_buffer: float | None = None
    tags: list[str] | None = None
    tag_ids: list[TagRefItem] | None = None
    owner_user_id: str | None = None
    created_at: datetime | None = None
    last_trade_at: datetime | None = None


class AssetsResponse(BaseModel):
    assets: list[AssetItem]
    total: int


# ---------------------------------------------------------------------------
# GET /v1/user_info
# ---------------------------------------------------------------------------

class BrokerItem(BaseModel):
    broker: str
    account_ref: str
    credential_payload: dict[str, Any] | None = None
    credential_version: int = 1
    last_rotated_at: datetime | None = None


class UserInfoResponse(BaseModel):
    runtime_id: str | None = None
    daemon_id: str | None = None
    trading_enabled: bool
    disabled_reason: str | None = None
    broker: BrokerItem | None = None
    # Additional informational fields
    user_id: str
    username: str
    email: str | None = None
    permission: str


# ---------------------------------------------------------------------------
# POST /v1/assets/{asset_id}/ledger/trades
# ---------------------------------------------------------------------------

class LedgerTradeRequest(BaseModel):
    order_id: str = Field(..., min_length=1)
    execution_id: str = Field(..., min_length=1)
    side: Literal["buy", "sell"]
    quantity: Decimal = Field(..., gt=0)
    price: Decimal = Field(..., gt=0)
    fee_amount: Decimal = Field(default=Decimal("0"), ge=0)
    tax_amount: Decimal = Field(default=Decimal("0"), ge=0)
    executed_at: datetime


class LedgerTradeResponse(BaseModel):
    ledger_entry_id: int
    portfolio_id: str
    order_id: str | None
    execution_id: str | None
    side: str
    quantity: float
    price: float
    fee_amount: float
    tax_amount: float
    executed_at: datetime
    recorded_at: datetime | None = None
    cash_balance_after: float = 0.0
    asset_quantity_after: float = 0.0
    status: Literal["new", "duplicate"] = "new"


# ---------------------------------------------------------------------------
# POST/GET /v1/portfolios/{id}/ledger/manual (REQ-056)
# ---------------------------------------------------------------------------

ManualLedgerAction = Literal[
    "INVEST",
    "BUFFER_OUT",
    "BUFFER_IN",
    "BUY",
    "SELL",
    "WITHDRAW",
    "PROFIT",
    "REVERSAL",
]


class ManualLedgerRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    action: ManualLedgerAction
    amount: Decimal | None = Field(default=None, gt=0)
    quantity: Decimal | None = Field(default=None, gt=0)
    price: Decimal | None = Field(default=None, gt=0)
    fee: Decimal = Field(default=Decimal("0"), ge=0)
    tax: Decimal = Field(default=Decimal("0"), ge=0)
    target_ledger_entry_id: int | None = None
    note: str = ""
    confirm_daemon_managed_manual_write: bool = False
    confirmation_evidence: str | None = None

    @model_validator(mode="after")
    def validate_action_fields(self) -> "ManualLedgerRequest":
        amount_actions = {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT"}
        trade_actions = {"BUY", "SELL"}
        provided_fields = self.model_fields_set
        fee_or_tax_provided = "fee" in provided_fields or "tax" in provided_fields
        if self.action in amount_actions:
            if self.amount is None:
                raise ValueError("amount is required for this action")
            if (
                self.quantity is not None
                or self.price is not None
                or self.target_ledger_entry_id is not None
                or fee_or_tax_provided
            ):
                raise ValueError("unexpected numeric/target field for amount action")
        elif self.action in trade_actions:
            if self.quantity is None or self.price is None:
                raise ValueError("quantity and price are required for BUY/SELL")
            if self.amount is not None or self.target_ledger_entry_id is not None:
                raise ValueError("unexpected amount/target field for BUY/SELL")
        elif self.action == "REVERSAL":
            if self.target_ledger_entry_id is None:
                raise ValueError("target_ledger_entry_id is required for REVERSAL")
            if self.amount is not None or self.quantity is not None or self.price is not None or fee_or_tax_provided:
                raise ValueError("unexpected numeric field for REVERSAL")
        return self


class ManualLedgerResponse(BaseModel):
    ledger_entry_id: int
    portfolio_id: str
    action: str
    amount: float | None = None
    quantity: float = 0.0
    price: float = 0.0
    fee: float = 0.0
    tax: float = 0.0
    note: str = ""
    recorded_at: datetime | None = None
    cash_balance_after: float = 0.0
    asset_quantity_after: float = 0.0
    profit_buffer_after: float = 0.0
    total_value_after: float = 0.0
    source: str = "manual"
    target_ledger_entry_id: int | None = None
    confirmation_evidence: str | None = None


class ManualLedgerHistoryResponse(BaseModel):
    items: list[ManualLedgerResponse]
    total: int


class LedgerHistoryItem(BaseModel):
    """Source-neutral, owner-visible ledger fact for GET /ledger."""

    ledger_entry_id: int
    portfolio_id: str
    source: str
    action: str
    recorded_at: datetime
    executed_at: datetime | None = None
    order_id: str | None = None
    execution_id: str | None = None
    quantity: float | None = None
    price: float | None = None
    fee_amount: float | None = None
    tax_amount: float | None = None
    note: str | None = None
    cash_balance_after: float | None = None
    asset_quantity_after: float | None = None
    profit_buffer_after: float | None = None
    total_value_after: float | None = None
    target_ledger_entry_id: int | None = None
    confirmation_evidence: str | None = None


class LedgerHistoryResponse(BaseModel):
    items: list[LedgerHistoryItem]
    next_cursor: str | None = None


class PortfolioReturnSummaryResponse(BaseModel):
    portfolio_id: str
    total_invested: float = Field(
        default=0.0,
        description="총투자원금: source와 무관한 유효 INVEST의 gross 합계",
    )
    total_withdrawn: float = Field(
        default=0.0,
        description="총회수원금: source와 무관한 유효 WITHDRAW 합계",
    )
    net_contributed_capital: float = Field(
        default=0.0,
        description="순투자원금: total_invested - total_withdrawn (PROFIT 제외)",
    )
    cumulative_profit_withdrawn: float = Field(
        default=0.0,
        description="누적 수익 인출액: source와 무관한 유효 PROFIT 합계 (원금 계산 제외)",
    )


# ---------------------------------------------------------------------------
# POST/PATCH/DELETE/GET /v1/portfolios (REQ-025, REQ-026, REQ-027, REQ-028)
# ---------------------------------------------------------------------------

class PortfolioCreateRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    asset_id: str = Field(..., min_length=1)
    broker: str = Field(..., min_length=1)
    name: str | None = None
    cash_balance: float = Field(default=0.0, ge=0.0)
    asset_quantity: float = Field(default=0.0, ge=0.0)
    asset_price: float = Field(default=0.0, ge=0.0)
    profit_buffer: float = Field(default=0.0, ge=0.0)
    strategy_id: str = Field(..., min_length=1)
    managed_by_daemon_id: str | None = None
    user_id: str | None = None  # admin-only: override owner


class PortfolioUpdateRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    broker: str | None = None
    status: str | None = None
    name: str | None = None
    strategy_id: str | None = Field(default=None, min_length=1)
    asset_price: float | None = Field(default=None, ge=0.0)
    managed_by_daemon_id: str | None = None


class PortfolioItem(BaseModel):
    portfolio_id: str
    asset_id: str | None = None
    symbol: str | None = None
    display_name: str | None = None
    owner_user_id: str | None = None
    broker: str
    status: str
    name: str
    cash_balance: float = 0.0
    asset_quantity: float = 0.0
    price: float = 0.0
    profit_buffer: float = 0.0
    net_contributed_capital: float = Field(
        default=0.0,
        description="순투자원금: source와 무관한 유효 INVEST 합계 - 유효 WITHDRAW 합계 (PROFIT 제외)",
    )
    cumulative_profit_withdrawn: float = Field(
        default=0.0,
        description="누적 수익 인출액: source와 무관한 유효 PROFIT 합계 (원금 계산 제외)",
    )
    tag_ids: list[str] = Field(default_factory=list)
    managed_by_daemon_id: str | None = None
    created_at: datetime | None = None
    updated_at: datetime | None = None
    # REQ-055: 전략·시장 메타데이터 additive 필드
    active_strategy_id: str | None = None
    strategy_name: str | None = None
    strategy_nick: str | None = None
    strategy_params: dict[str, Any] = Field(default_factory=dict)
    strategy_revision: int | None = Field(default=None, ge=1)
    markets: list[str] = Field(default_factory=list)


class PortfolioListResponse(BaseModel):
    portfolios: list[PortfolioItem]
    total: int


# ---------------------------------------------------------------------------
# GET /v1/strategies, CRUD /v1/admin/strategies
# ---------------------------------------------------------------------------

StrategyStatus = Literal["active", "inactive"]


class StrategyResponse(BaseModel):
    strategy_id: str
    nick: str
    name: str
    config: dict[str, Any] = Field(default_factory=dict)
    status: StrategyStatus
    revision: int = Field(ge=1)
    created_at: datetime | None = None
    updated_at: datetime | None = None


class StrategyCreateRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    name: str = Field(..., min_length=1)
    nick: str | None = Field(default=None, min_length=1)
    config: dict[str, Any] = Field(default_factory=dict)
    status: StrategyStatus = "active"

    @field_validator("nick")
    @classmethod
    def normalize_nick(cls, value: str | None) -> str | None:
        if value is None:
            raise ValueError("nick must not be null")
        normalized = value.strip()
        if not normalized:
            raise ValueError("nick must not be blank")
        return normalized


class StrategyUpdateRequest(BaseModel):
    model_config = ConfigDict(extra="forbid")

    name: str | None = Field(default=None, min_length=1)
    nick: str | None = Field(default=None, min_length=1)
    config: dict[str, Any] | None = None
    status: StrategyStatus | None = None

    @field_validator("nick")
    @classmethod
    def normalize_nick(cls, value: str | None) -> str | None:
        if value is None:
            raise ValueError("nick must not be null")
        normalized = value.strip()
        if not normalized:
            raise ValueError("nick must not be blank")
        return normalized

    @model_validator(mode="after")
    def require_change(self) -> "StrategyUpdateRequest":
        if not self.model_fields_set:
            raise ValueError("at least one field is required")
        return self


# ---------------------------------------------------------------------------
# GET /v1/portfolios/{id}/tags, CRUD /v1/portfolios/{id}/comments (REQ-030, REQ-031)
# ---------------------------------------------------------------------------

class PortfolioTagListResponse(BaseModel):
    tags: list[TagItem]
    total: int


class PortfolioCommentItem(BaseModel):
    comment_id: str
    portfolio_id: str
    content: str
    created_at: datetime | None = None
    updated_at: datetime | None = None


class PortfolioCommentRequest(BaseModel):
    content: str = Field(..., min_length=1)


class PortfolioCommentUpdateRequest(BaseModel):
    content: str = Field(..., min_length=1)


class PortfolioCommentListResponse(BaseModel):
    comments: list[PortfolioCommentItem]
    total: int


# ---------------------------------------------------------------------------
# POST/PATCH /v1/assets (admin catalog management — REQ-010)
# ---------------------------------------------------------------------------

class AssetCatalogCreateRequest(BaseModel):
    symbol: str = Field(..., min_length=1)
    markets: list[str] = Field(default_factory=list)
    display_name: str | None = None
    status: str = "active"


class AssetCatalogUpdateRequest(BaseModel):
    markets: list[str] | None = None
    display_name: str | None = None
    status: str | None = None


class AssetCatalogResponse(BaseModel):
    asset_id: str
    symbol: str
    markets: list[str]
    display_name: str | None = None
    status: str
    tag_ids: list[TagRefItem] = Field(default_factory=list)
    created_at: datetime | None = None
    updated_at: datetime | None = None


class AssetCatalogListResponse(BaseModel):
    items: list[AssetCatalogResponse]
    total: int


# ---------------------------------------------------------------------------
# GET /v1/portfolios/{id}/trades (REQ-039)
# ---------------------------------------------------------------------------

class TradeHistoryItem(BaseModel):
    ledger_entry_id: int
    portfolio_id: str
    order_id: str | None = None
    execution_id: str | None = None
    side: str
    quantity: float
    price: float
    fee_amount: float
    tax_amount: float
    executed_at: datetime
    recorded_at: datetime | None = None


class TradeHistoryResponse(BaseModel):
    items: list[TradeHistoryItem]
    total: int


# ---------------------------------------------------------------------------
# GET /v1/portfolios/{id}/pnl/realized (REQ-040)
# ---------------------------------------------------------------------------

class RealizedPnlItem(BaseModel):
    symbol: str | None = None
    executed_at: datetime | None = None
    quantity: float
    sell_price: float
    cost_basis_per_unit: float
    fee_amount: float
    tax_amount: float
    realized_pnl: float
    order_id: str | None = None
    execution_id: str | None = None


class RealizedPnlResponse(BaseModel):
    total_realized_pnl: float
    items: list[RealizedPnlItem]
    cost_basis_from: datetime | None = None
    data_completeness_warning: str | None = None


# ---------------------------------------------------------------------------
# GET /v1/portfolios/{id}/holdings/cost-basis (REQ-043)
# ---------------------------------------------------------------------------

class HoldingsCostBasisResponse(BaseModel):
    portfolio_id: str
    symbol: str | None = None
    current_quantity: float
    cost_basis_per_unit: float | None = None
    total_cost_basis: float | None = None
    cost_basis_from: datetime | None = None
    data_completeness_warning: str | None = None


# ---------------------------------------------------------------------------
# GET /v1/daemons (REQ-045)
# ---------------------------------------------------------------------------

class DaemonResponse(BaseModel):
    id: str
    daemon_slug: str
    display_name: str | None = None
    is_active: bool


class DaemonListResponse(BaseModel):
    daemons: list[DaemonResponse]
    total: int


# ---------------------------------------------------------------------------
# GET/PUT/DELETE /v1/daemons/{daemon_id}/credential (REQ-052)
# ---------------------------------------------------------------------------

class CredentialSetRequest(BaseModel):
    """Credential write request — app_key/app_secret/account_ref inputs only.

    Fernet-encrypted server-side; secret never returned in any response.
    """
    app_key: str = Field(..., min_length=1)
    app_secret: str = Field(..., min_length=1)
    account_ref: str = Field(..., min_length=1)
    broker: str = Field(default="kis", min_length=1)


class CredentialMetaResponse(BaseModel):
    """Credential metadata response — secret fields intentionally absent (REQ-052, REQ-054)."""
    daemon_id: str
    broker: str
    account_ref: str
    has_credential: bool
    credential_version: int
    last_rotated_at: datetime | None = None


# ---------------------------------------------------------------------------
# POST/PATCH /v1/admin/daemons (REQ-053)
# ---------------------------------------------------------------------------

class DaemonCreateRequest(BaseModel):
    daemon_slug: str = Field(..., min_length=1)
    display_name: str | None = None
    owner_user_id: str = Field(..., min_length=1)


class DaemonUpdateRequest(BaseModel):
    display_name: str | None = None
    owner_user_id: str | None = None


class DaemonAdminResponse(BaseModel):
    """Admin daemon response — no credential fields (REQ-054)."""
    id: str
    daemon_slug: str
    display_name: str | None = None
    owner_user_id: str
    is_active: bool


# ---------------------------------------------------------------------------
# GET /v1/admin/daemons (REQ-053 목록 조회)
# ---------------------------------------------------------------------------

class DaemonDetail(BaseModel):
    """Single daemon item for admin list — matches trex-web DaemonDetail contract."""
    id: str
    daemon_slug: str
    display_name: str | None = None
    is_active: bool
    owner_user_id: str


class DaemonDetailListResponse(BaseModel):
    """Response for GET /v1/admin/daemons — matches trex-web DaemonDetailListResponse."""
    daemons: list[DaemonDetail]
    total: int