from __future__ import annotations

from .shared import *

from .charter_seed_utils import _build_signal_context_text, _to_bullet_text, _to_string_list
from .charter_prefill_utils import _default_ai_validations, _default_escalation_trigger, _generate_charter_seed

async def _build_ai_first_charter_content(
    *,
    db: AsyncSession,
    tenant_id: int,
    project_id: int,
    signal_rows: list[Signal],
    signal_ids: list[int],
    raw_text: str = "",
) -> dict[str, Any]:
    signal_context = _build_signal_context_text(signal_rows, raw_text=raw_text)
    seed = await _generate_charter_seed(
        db=db,
        tenant_id=tenant_id,
        project_id=project_id,
        signal_context=signal_context,
    )

    summary = str(seed.get("summary") or "").strip()
    background = str(seed.get("background") or "").strip()
    objectives = _to_string_list(seed.get("objectives"))
    scope = str(seed.get("scope") or "").strip()
    in_scope_items = _to_string_list(seed.get("in_scope"))
    out_of_scope_items = _to_string_list(seed.get("out_of_scope"))
    success_metrics = _to_string_list(seed.get("success_metrics"))
    risks = _to_string_list(seed.get("risks"))
    dependencies = _to_string_list(seed.get("dependencies"))
    primary_model = str(seed.get("primary_model") or "").strip()
    fallback_model = str(seed.get("fallback_model") or "").strip()

    if not summary:
        summary = "目标用户在当前流程中存在效率损耗，需要通过 AI 驱动的流程优化提升交付质量与速度。"
    if not background:
        background = signal_context[:500] or "基于已绑定信号源自动生成。"
    if not objectives:
        objectives = ["缩短端到端交付周期", "提升关键路径质量稳定性", "降低跨角色协同成本"]
    if not success_metrics:
        success_metrics = ["需求到上线周期缩短 >= 30%", "关键任务按期交付率 >= 90%", "线上回滚率 <= 3%"]
    if not in_scope_items:
        in_scope_items = ["需求澄清与宪章生成自动化", "任务拆解与负责人推荐", "对齐状态自动追踪与留痕"]
    if not out_of_scope_items:
        out_of_scope_items = ["替代团队组织架构决策", "绕过人工否决机制自动上线", "非项目相关流程改造"]
    if not risks:
        risks = ["需求波动导致范围蔓延", "模型能力边界与输入复杂度不匹配", "关键成员负载过高导致延期"]
    if not dependencies:
        dependencies = ["FastAPI", "React", "LLM 推理服务", "项目知识库/日志系统"]
    if not primary_model:
        primary_model = "待 AI 评估后绑定"
    if not fallback_model:
        fallback_model = "同供应商低成本模型"

    source_refs = [f"signal:{sid}" for sid in signal_ids]
    now_iso = now_cn_aware().isoformat()
    validations_m1 = _default_ai_validations("模块1：触发与目标")
    validations_m2 = _default_ai_validations("模块2：范围与对齐")
    validations_m3 = _default_ai_validations("模块3：模型与依赖")
    validations_m4 = _default_ai_validations("模块4：计划与资源")
    validations_m5 = _default_ai_validations("模块5：风险与兜底")
    validations_m6 = _default_ai_validations("模块6：附件与治理")
    escalation = _default_escalation_trigger()

    alignment_qa = _to_bullet_text(
        [
            f"核心用户与痛点：{summary}",
            "上线时间与硬约束：由里程碑计划自动回填并持续校验",
            f"明确不做项：{'; '.join(out_of_scope_items[:3])}",
            f"关键依赖：{'; '.join(dependencies[:4])}",
            f"核心风险与缓解：{'; '.join(risks[:3])}",
        ]
    )

    modules = {
        "module_1": {
            "problem_statement": summary,
            "goal_statement": _to_bullet_text(objectives),
            "kpis": _to_bullet_text(success_metrics),
            "ai_validations": validations_m1,
            "escalation_trigger": escalation,
        },
        "module_2": {
            "in_scope": _to_bullet_text(in_scope_items),
            "out_of_scope": _to_bullet_text(out_of_scope_items),
            "alignment_qa": alignment_qa,
            "ai_validations": validations_m2,
            "escalation_trigger": escalation,
        },
        "module_3": {
            "primary_model": primary_model,
            "fallback_model": fallback_model,
            "capability_table": _to_bullet_text(
                [
                    "上下文窗口/并发/延迟由模型能力中心实时读取",
                    "按 P50/P90 工作负载自动估算 token 与成本",
                    "超边界输入自动触发替代模型建议",
                ]
            ),
            "dependency_map": _to_bullet_text(dependencies),
            "business_view": "以业务术语展示能力上限、成本区间与上线风险。",
            "engineering_view": "以工程参数展示 context window、QPS、成本与错误预算。",
            "ai_validations": validations_m3,
            "escalation_trigger": escalation,
        },
        "module_4": {
            "milestones": _to_bullet_text(
                [
                    "需求冻结 -> 技术评审 -> 开发完成 -> QA 验收 -> 发布上线",
                    "关键依赖阻塞超过阈值自动重排计划",
                ]
            ),
            "role_effort_estimates": _to_bullet_text(
                [
                    "产品/PM：需求澄清与验收口径",
                    "前后端工程：核心功能开发与联调",
                    "AI 工程：模型评估、提示词与推理链路优化",
                ]
            ),
            "capability_owner_assignment": "负责人由能力图谱自动推荐并可人工否决。",
            "buffer_policy": "默认 15% 进度缓冲，关键路径超阈值触发自动预警。",
            "ai_validations": validations_m4,
            "escalation_trigger": escalation,
        },
        "module_5": {
            "risk_register": _to_bullet_text(risks),
            "trigger_rules": _to_bullet_text(
                [
                    "进度偏差 > 15%",
                    "关键接口错误率连续超过阈值",
                    "模型调用成本超预算预警线",
                ]
            ),
            "execution_rule": _to_bullet_text(
                [
                    "触发后优先执行预设 fallback",
                    "自动通知责任人并写入审计日志",
                    "连续失败时升级到人工决策",
                ]
            ),
            "ai_validations": validations_m5,
            "escalation_trigger": escalation,
        },
        "module_6": {
            "attachment_metadata": _to_bullet_text(
                [
                    "原始信号记录",
                    "需求讨论记录",
                    "设计与评审文档",
                    "发布与复盘材料",
                ]
            ),
            "attachment_summary": "AI 自动提炼附件决策结论并关联到对应模块字段。",
            "search_tags": _to_bullet_text(["需求宪章", "AI First", "SSTC", "对齐记录"]),
            "ai_validations": validations_m6,
            "governance_rule": "附件仅作证据引用，核心事实字段以模块1-5为准。",
        },
    }

    return {
        "schema_version": "charter_ai_first_v1",
        "auto_generated_by_ai": True,
        "metadata": {
            "status": "draft",
            "confidence_score": 0.82 if seed else 0.72,
            "last_validated_at": now_iso,
            "evidence_refs": source_refs,
            "escalation_reason": None,
        },
        "modules": modules,
        "signal_ids": signal_ids,
        "summary": summary,
        "background": background,
        "objectives": objectives,
        "scope": scope,
        "success_metrics": success_metrics,
        "core_metrics": success_metrics,
        "rationale": summary,
        "decision": _to_bullet_text(objectives),
        "in_scope": in_scope_items,
        "out_of_scope": out_of_scope_items,
        "risks": risks,
        "raw_source_text": raw_text.strip() or None,
    }