from __future__ import annotations

import json
from dataclasses import dataclass
from pathlib import Path
from typing import Any

from content_agent.findings import fail as _fail


WALK_STRATEGY_PATH = Path("product_documents/抖音游走策略/douyin_walk_strategy.v1.json")
RULE_PACK_PATH = Path("product_documents/规则包/douyin_rule_packs.v1.json")
# V3 清理: 13 段收窄到 3 个仍被运行时/校验消费的段——
# walk_edge_catalog(walk_graph.json 边 ID 合法性校验)、walk_rule_pack_binding
# (终端阶段归属包)、walk_fact_contract(runtime 文件契约校验);其余 10 段
# (老预算/停止/重试/触发规则等)已被 walk_graph+walk_policy 取代,随段删除。
REQUIRED_SECTIONS = [
    "walk_edge_catalog",
    "walk_rule_pack_binding",
    "walk_fact_contract",
]


@dataclass(frozen=True)
class WalkStrategyStore:
    root_dir: Path = Path(".")
    strategy_path: Path = WALK_STRATEGY_PATH
    rule_pack_path: Path = RULE_PACK_PATH

    def load_walk_strategy(self) -> dict[str, Any]:
        from content_agent.integrations import config_store

        path = self.root_dir / self.strategy_path
        strategy, _ = config_store.load_json(path)
        findings = validate_walk_strategy_config(
            strategy,
            root_dir=self.root_dir,
            strategy_path=self.strategy_path,
            rule_pack_path=self.rule_pack_path,
        )
        failures = [finding for finding in findings if finding["level"] == "fail"]
        if failures:
            raise ValueError(f"invalid walk strategy config: {failures}")
        return {
            **strategy,
            "walk_strategy_version": strategy.get("strategy_version"),
            "walk_strategy_source_ref": {
                "file": str(self.strategy_path),
                "strategy_id": strategy.get("strategy_id"),
                "walk_strategy_version": strategy.get("strategy_version"),
                "source_of_truth": strategy.get("source_of_truth"),
            },
        }


def validate_walk_strategy_config(
    strategy: dict[str, Any],
    *,
    root_dir: Path = Path("."),
    strategy_path: Path = WALK_STRATEGY_PATH,
    rule_pack_path: Path = RULE_PACK_PATH,
) -> list[dict[str, Any]]:
    findings: list[dict[str, Any]] = []
    _check_identity(strategy, strategy_path, findings)
    _check_required_sections(strategy, findings)
    if any(finding["level"] == "fail" for finding in findings):
        return findings

    edge_ids = _ids(strategy["walk_edge_catalog"], "edge_id")
    _check_edge_refs(strategy, edge_ids, findings)
    _check_fact_contract(strategy["walk_fact_contract"], findings)
    _check_rule_pack_bindings(
        strategy["walk_rule_pack_binding"],
        root_dir / rule_pack_path,
        findings,
    )
    return findings


def _check_identity(
    strategy: dict[str, Any],
    strategy_path: Path,
    findings: list[dict[str, Any]],
) -> None:
    if strategy.get("strategy_id") != "douyin_walk_strategy_v1":
        _fail(findings, "strategy_id", "strategy_id must be douyin_walk_strategy_v1")
    if strategy.get("strategy_version") != "V1.0":
        _fail(findings, "strategy_version", "walk strategy config version must be V1.0")
    if strategy.get("source_of_truth") != str(strategy_path):
        _fail(findings, "source_of_truth", f"source_of_truth must be {strategy_path}")


def _check_required_sections(strategy: dict[str, Any], findings: list[dict[str, Any]]) -> None:
    for section in REQUIRED_SECTIONS:
        value = strategy.get(section)
        if not isinstance(value, list) or not value:
            _fail(findings, "section_missing", f"{section} must be a non-empty list")


def _check_edge_refs(
    strategy: dict[str, Any],
    edge_ids: set[str],
    findings: list[dict[str, Any]],
) -> None:
    for section in ["walk_rule_pack_binding"]:
        for row in strategy.get(section, []):
            if row.get("edge_id") not in edge_ids:
                _fail(
                    findings,
                    "edge_ref",
                    f"{section} references unknown edge_id: {row.get('edge_id')}",
                )


def _check_fact_contract(
    contracts: list[dict[str, Any]], findings: list[dict[str, Any]]
) -> None:
    by_file = {contract.get("runtime_file"): contract for contract in contracts}
    walk_actions = by_file.get("walk_actions.jsonl")
    if not walk_actions:
        _fail(findings, "walk_actions_contract", "walk_actions.jsonl contract is required")
    else:
        unique_key = walk_actions.get("unique_key")
        if unique_key != ["run_id", "policy_run_id", "walk_action_id"]:
            _fail(findings, "walk_actions_unique_key", "walk_actions unique key is invalid")
    search_clues = by_file.get("search_clues.jsonl")
    if not search_clues:
        _fail(findings, "search_clues_contract", "search_clues.jsonl contract is required")
    elif search_clues.get("unique_key") != ["run_id", "policy_run_id", "clue_id"]:
        _fail(findings, "search_clues_unique_key", "search_clues unique key must use clue_id")


def _check_rule_pack_bindings(
    bindings: list[dict[str, Any]],
    rule_pack_path: Path,
    findings: list[dict[str, Any]],
) -> None:
    rule_package = json.loads(rule_pack_path.read_text(encoding="utf-8"))
    enabled_packs = {
        (pack.get("rule_pack_id"), pack.get("version"))
        for pack in rule_package.get("rule_packs", [])
        if pack.get("enabled")
    }
    for binding in bindings:
        key = (binding.get("rule_pack_id"), binding.get("rule_pack_version"))
        if key not in enabled_packs:
            _fail(
                findings,
                "rule_pack_binding",
                f"{binding.get('binding_id')} references missing enabled rule pack: {key}",
            )


def _ids(rows: list[dict[str, Any]], field: str) -> set[str]:
    return {str(row[field]) for row in rows if row.get(field)}