"""
gap_engine.models — 数据模型（照 GapEngine 原文，含创意卡扩展）

原文 7 个类：ParamValue / Param / Layer / ParamLibrary / Selection / GapResult / CreativeConstraints
扩展：ComboCandidate（AI 生成的候选组合）、CreativeCard（入库的创意卡）
"""
from __future__ import annotations

from datetime import datetime, timezone
from typing import Any, Optional

from pydantic import BaseModel, Field


# ════════════════════════════════════════════════════════════
# 参数库（照原文）
# ════════════════════════════════════════════════════════════

class ParamValue(BaseModel):
    """单个参数值：值名 + 预期强度 + 画面联想描述"""
    value: str
    intensity: float = 0.5
    cue: str = ""


class Param(BaseModel):
    id: str
    name: str
    values: list[ParamValue] = Field(default_factory=list)


class Layer(BaseModel):
    id: str
    name: str
    params: list[Param] = Field(default_factory=list)


class ParamLibrary(BaseModel):
    layers: list[Layer] = Field(default_factory=list)

    def find_value(self, layer_id: str, param_id: str, value: str) -> Optional[ParamValue]:
        for L in self.layers:
            if L.id != layer_id:
                continue
            for p in L.params:
                if p.id != param_id:
                    continue
                for v in p.values:
                    if v.value == value:
                        return v
        return None

    def param_name(self, layer_id: str, param_id: str) -> str:
        for L in self.layers:
            if L.id == layer_id:
                for p in L.params:
                    if p.id == param_id:
                        return p.name
        return param_id


# ════════════════════════════════════════════════════════════
# 选择与缺口（照原文）
# ════════════════════════════════════════════════════════════

class Selection(BaseModel):
    """一次选择：某个参数取某个值"""
    layer_id: str
    param_id: str
    param_name: str = ""
    value: str
    intensity: float
    cue: str = ""


class GapResult(BaseModel):
    """缺口计算结果（字段口径照原文）"""
    selections: list[Selection] = Field(default_factory=list)
    variance: float = 0.0
    gap_score: float = 0.0          # 0-100（方差 × 400 归一，原文口径：落差型反差）
    extreme_score: float = 0.0      # 0-100（平均偏离中性 0.5，补足"整体异质"型反差）
    high_count: int = 0             # intensity >= 0.6
    low_count: int = 0              # intensity <= 0.3
    scene_card: str = ""            # 画面联想卡
    level: str = ""                 # 显著 / 中等 / 微弱


class CreativeConstraints(BaseModel):
    """矩阵配置（负面/正向/道具场景）—— 本文档不含生成参数"""
    negative_hard: list[dict] = Field(default_factory=list)
    negative_soft: list[dict] = Field(default_factory=list)
    positive: list[dict] = Field(default_factory=list)
    props: list[dict] = Field(default_factory=list)
    scenes: list[dict] = Field(default_factory=list)

    def relaxed_soft_ids(self) -> list[str]:
        return [s["id"] for s in self.negative_soft if s.get("relaxed")]

    def locked_hard_ids(self) -> list[str]:
        return [s["id"] for s in self.negative_hard if s.get("locked")]


# ════════════════════════════════════════════════════════════
# 候选组合（AI 生成，扩展）
# ════════════════════════════════════════════════════════════

class ComboCandidate(BaseModel):
    """一条候选创意（= 一次完整选择 + 缺口分 + 一句话联想 + 风险标记）"""
    cid: str = ""                        # 候选 id（批次内唯一）
    one_liner: str = ""                  # 核心产物：一句话联想（导演据此脑补）
    selections: list[Selection] = Field(default_factory=list)
    key_points: list[str] = Field(default_factory=list)   # 关键联想点（不展开就能判断）
    gap_score: float = 0.0
    extreme_score: float = 0.0   # 整体异质度（全高强度也可能是强反差）
    variance: float = 0.0
    level: str = ""
    scene_card: str = ""
    risks: list[dict] = Field(default_factory=list)   # [{kind:'soft'|'hard', id, name, reason}]
    needs_soft: list[str] = Field(default_factory=list)   # LLM 标注：本条需要放开哪些 🟡 项（id）
    needs_hard: list[str] = Field(default_factory=list)   # LLM 标注：本条涉及哪些 🔴 项（id）→ 命中即淘汰
    positive_hits: list[str] = Field(default_factory=list)  # 命中的正向项 id
    bonus: float = 0.0                   # 正向加权分
    final_score: float = 0.0             # gap_score + bonus
    props: list[str] = Field(default_factory=list)     # 道具（名称）
    scenes: list[str] = Field(default_factory=list)    # 场景变量（名称）
    filtered: bool = False               # 是否被硬过滤淘汰
    filter_reason: str = ""


# ════════════════════════════════════════════════════════════
# 创意卡（入库，扩展）
# ════════════════════════════════════════════════════════════

INJECT_MODES = ("strict", "reference", "idea_only")


class CreativeCard(BaseModel):
    """创意卡 = 入创意库的一条创意（可被分镜/口播/脚本流程引用）"""
    id: str = ""
    title: str = ""                       # 主题（一句话）
    one_liner: str = ""                   # 一句话联想
    brief: str = ""                       # 原始输入的 1-2 句话
    selections: list[Selection] = Field(default_factory=list)
    props: list[str] = Field(default_factory=list)
    scenes: list[str] = Field(default_factory=list)
    gap_score: float = 0.0
    variance: float = 0.0
    level: str = ""
    scene_card: str = ""
    positive_hits: list[str] = Field(default_factory=list)
    matrix_snapshot: dict = Field(default_factory=dict)   # 本次矩阵（含放开了哪些🟡）
    inject_mode: str = "reference"        # strict 严格约束 / reference 参考 / idea_only 仅创意
    status: str = "draft"                 # draft 草稿 / selected 已选 / used 已用于
    used_by: list[dict] = Field(default_factory=list)     # [{flow, run_id, at}]
    created_at: str = ""
    updated_at: str = ""


def utcnow() -> str:
    return datetime.now(timezone.utc).isoformat(timespec="seconds")