"""Bounded SUPER authoring inputs, independent from regular data-field preparation."""

from typing import Literal

from pydantic import Field, field_validator, model_validator

from ..backtests.contracts import SuperSimulationSettings
from ..research.expressions import IDENTIFIER, PLACEHOLDER
from ..research.workspace_contracts import Variable
from ..schemas import AlphaFilters, Contract


class PlanSpec(Contract):
    name: str = Field(min_length=1, max_length=200)
    hypothesis: str = Field(min_length=1, max_length=2000)
    selection: str = Field(min_length=1, max_length=20000)
    combo: str = Field(min_length=1, max_length=20000)
    variables: dict[str, Variable] = Field(default_factory=dict, max_length=50)
    settings: SuperSimulationSettings
    setting_variants: dict[str, list[str | int | float | bool]] = Field(default_factory=dict, max_length=20)
    include_baseline: bool = False
    reference: str = Field(default="", max_length=200)
    parent_plan_id: str | None = Field(default=None, max_length=36)
    parent_plan_version: int | None = Field(default=None, ge=1)
    parent_alpha_id: str | None = Field(default=None, pattern=r"^[A-Za-z0-9_-]{1,100}$")
    parent_experiment_id: str | None = Field(default=None, max_length=36)

    @field_validator("name", "hypothesis", "selection", "combo")
    @classmethod
    def text(cls, value):
        if not value.strip():
            raise ValueError("内容不能为空")
        return value.strip()

    @model_validator(mode="after")
    def bindings(self):
        text = self.selection + "\n" + self.combo
        if set(PLACEHOLDER.findall(text)) != set(self.variables):
            raise ValueError("Selection/Combo 占位符必须与变量逐一对应")
        if any(not IDENTIFIER.fullmatch(k) or v.kind == "field" for k, v in self.variables.items()):
            raise ValueError("SUPER 变量须使用合法名称，不能使用 REGULAR 数据字段绑定")
        if "{" in PLACEHOLDER.sub("", text) or "}" in PLACEHOLDER.sub("", text):
            raise ValueError("占位符格式错误")
        for key, values in self.setting_variants.items():
            if key not in SuperSimulationSettings.model_fields or not 1 <= len(values) <= 100:
                raise ValueError("设置变量必须为已支持设置，每项 1–100 个候选值")
            for value in values:
                SuperSimulationSettings.model_validate({**self.settings.model_dump(), key: value})
        if bool(self.parent_plan_id) != bool(self.parent_plan_version):
            raise ValueError("父方案必须同时指定 ID 和版本")
        return self


class PlanSearch(Contract):
    q: str = Field(default="", max_length=200)
    limit: int = Field(default=25, ge=1, le=100)
    offset: int = Field(default=0, ge=0)


class PlanReference(PlanSearch):
    plan_id: str | None = Field(default=None, min_length=1, max_length=36)
    experiment_id: str | None = Field(default=None, min_length=1, max_length=36)
    version: int | None = Field(default=None, ge=1)

    @model_validator(mode="after")
    def one_reference(self):
        if bool(self.plan_id) == bool(self.experiment_id) or (self.version and not self.plan_id):
            raise ValueError("提供 plan_id 或 experiment_id 之一；version 仅用于方案")
        return self


class PlanSave(Contract):
    plan: PlanSpec
    plan_id: str | None = Field(default=None, max_length=36)
    version: int | None = Field(default=None, ge=1)
    idempotency_key: str = Field(min_length=1, max_length=100)

    @model_validator(mode="after")
    def reference(self):
        if bool(self.plan_id) != bool(self.version):
            raise ValueError("更新须同时提供方案 ID 与当前版本")
        return self


class SelectionPreview(Contract):
    plan_id: str | None = Field(default=None, max_length=36)
    version: int | None = Field(default=None, ge=1)
    selection: str = Field(min_length=1, max_length=20000)
    settings: SuperSimulationSettings

    @field_validator("selection")
    @classmethod
    def concrete(cls, value):
        if not value.strip() or "{" in value or "}" in value:
            raise ValueError("预览须提供展开后的非空 Selection")
        return value.strip()

    def platform_query(self):
        return {"selection": self.selection, **self.settings.model_dump(include={
            "instrumentType", "region", "delay", "selectionLimit", "selectionHandling"})}


class SelectionReference(PlanSearch):
    snapshot_id: str | None = Field(default=None, max_length=36)
    job_id: str | None = Field(default=None, max_length=36)

    @model_validator(mode="after")
    def one(self):
        if bool(self.snapshot_id) == bool(self.job_id):
            raise ValueError("提供 snapshot_id 或 job_id 之一")
        return self


class BuildCandidates(Contract):
    plan: PlanSpec | None = None
    plan_id: str | None = Field(default=None, max_length=36)
    version: int | None = Field(default=None, ge=1)
    mode: Literal["all", "random"] = "all"
    limit: int = Field(default=100, ge=1, le=10000)
    seed: int = Field(default=0, ge=0, le=2147483647)
    selection_snapshot_ids: list[str] = Field(default_factory=list, max_length=100)
    idempotency_key: str = Field(min_length=1, max_length=100)

    @model_validator(mode="after")
    def one(self):
        if bool(self.plan) == bool(self.plan_id) or bool(self.plan_id) != bool(self.version):
            raise ValueError("提供内联方案或方案 ID/版本之一")
        return self


class SuperAlphaSearch(Contract):
    filters: AlphaFilters = Field(default_factory=AlphaFilters)


class AlphaReference(Contract):
    alpha_id: str = Field(pattern=r"^[A-Za-z0-9_-]{1,100}$")


class ExperimentPreview(Contract):
    candidate_ids: list[str] = Field(min_length=1, max_length=10000)