"""
空运 TMS 线路报价：从 airOptions 拆出可选线路。

本文件职责：判断一条还是多条、拼航线（含中转）、抽出该线路费用。
选定后把起运港写回 facts。中转只用于展示，不写进报价单模板。
禁止：猜没回的机场名；把贸易条款当线路；改六态。
"""

from __future__ import annotations

import json
import logging
from typing import Any

from agent.schema.tms_air_query import _AIRPORTS, resolve_airport_code

logger = logging.getLogger(__name__)

# 三字码 → 销售侧地名；同码多个中文时取较短的常用名。
_CODE_NAME: dict[str, str] = {}
for name, code in _AIRPORTS.items():
    prev = _CODE_NAME.get(code)
    if prev is None or len(name) < len(prev):
        _CODE_NAME[code] = name


def parse_air_options(quote: dict[str, Any] | None) -> list[dict[str, Any]]:
    """把 quote.airOptions（list 或 JSON 串）收成字典列表。"""
    src = dict(quote or {})
    raw = src.get("airOptions") or src.get("air_options")
    if isinstance(raw, str) and raw.strip():
        try:
            raw = json.loads(raw)
        except json.JSONDecodeError:
            logger.warning("air.routes airOptions 不是 JSON")
            return []
    if not isinstance(raw, list):
        return []
    out: list[dict[str, Any]] = []
    for item in raw:
        if isinstance(item, dict):
            out.append(dict(item))
    return out


def needs_route_pick(quote: dict[str, Any] | None) -> bool:
    """多于一条线路才进 H5 选。"""
    return len(parse_air_options(quote)) > 1


def _place_name(code: str, fallback: str = "") -> str:
    """三字码能对上就用中文，否则用原文或 fallback。"""
    raw = (code or "").strip()
    if not raw:
        return (fallback or "").strip()
    mapped = _CODE_NAME.get(raw.upper())
    if mapped:
        return mapped
    if resolve_airport_code(raw):
        return _CODE_NAME.get(resolve_airport_code(raw), raw)
    return raw


def route_line(option: dict[str, Any] | None, facts: dict[str, str] | None = None) -> str:
    """
    销售侧航线：有中转写成 起运-中转-目的。
    对不上字典就展示三字码，禁止编城市。
    """
    src = dict(option or {})
    facts = facts or {}
    origin = _place_name(
        str(src.get("originAirportCode") or src.get("origin") or ""),
        str(facts.get("起运港") or ""),
    )
    dest = _place_name(
        str(src.get("destinationAirportCode") or src.get("destination") or ""),
        str(facts.get("目的港") or ""),
    )
    transfer = _place_name(str(src.get("transferAirportCode") or src.get("transfer") or ""))
    bits = [x for x in (origin, transfer, dest) if x]
    return "-".join(bits)


def _iata_code(raw: str, fallback: str = "") -> str:
    """只要三字码。已是代码就用；中文能投影就投影。禁止编假码。"""
    text = (raw or "").strip()
    if len(text) == 3 and text.isalpha():
        return text.upper()
    mapped = resolve_airport_code(text) or resolve_airport_code(fallback)
    return (mapped or "").upper()


def route_codes(
    option: dict[str, Any] | None,
    facts: dict[str, str] | None = None,
    quote: dict[str, Any] | None = None,
) -> str:
    """
    价格明细/方案卡用的航线三字码：有中转写成 ZUH-CAN-CRK。
    对不上就不写假中转。
    """
    src = dict(option or {})
    if not src:
        q = dict(quote or {})
        src = dict(q.get("selected_air_option") or {})
        if not src:
            opts = parse_air_options(q)
            src = dict(opts[0]) if opts else {}
    facts = facts or {}
    origin = _iata_code(
        str(src.get("originAirportCode") or src.get("origin") or facts.get("originCode") or ""),
        str(facts.get("起运港") or ""),
    )
    dest = _iata_code(
        str(src.get("destinationAirportCode") or src.get("destination") or facts.get("destinationCode") or ""),
        str(facts.get("目的港") or ""),
    )
    transfer = _iata_code(
        str(
            src.get("transferAirportCode")
            or src.get("transfer")
            or (quote or {}).get("transferAirportCode")
            or ""
        )
    )
    bits = [x for x in (origin, transfer, dest) if x]
    return "-".join(bits)


def scheme_route_codes(
    quote: dict[str, Any] | None,
    facts: dict[str, str] | None = None,
) -> str:
    """方案卡航线：空运ZUH→中转→CRK。没有代码则退回地名。"""
    codes = route_codes(None, facts, quote)
    if codes:
        return "空运" + codes.replace("-", "→")
    facts = facts or {}
    origin = (facts.get("起运港") or "-").strip() or "-"
    dest = (facts.get("目的港") or "-").strip() or "-"
    return f"空运{origin}→{dest}"


def _fee_row(item: dict[str, Any]) -> tuple[str, str] | None:
    """一条 TMS 费用。有名称才算；金额空则用单价。禁止编费目。"""
    name = str(
        item.get("chargeName") or item.get("feeName") or item.get("name") or ""
    ).strip()
    if not name:
        return None
    ccy = str(item.get("currency") or "").strip()
    amount = item.get("amount")
    if amount is None or str(amount).strip() == "":
        amount = item.get("unitPrice") or item.get("unit_price")
    text = str(amount or "").strip()
    if ccy and text and ccy not in text:
        text = f"{ccy} {text}"
    return (name, text or "-")


def _rows_from_list(raw: Any) -> list[tuple[str, str]]:
    """把 TMS 费用数组收成展示行。不是列表就当没有。"""
    if isinstance(raw, str) and raw.strip():
        try:
            raw = json.loads(raw)
        except json.JSONDecodeError:
            return []
    if not isinstance(raw, list):
        return []
    out: list[tuple[str, str]] = []
    for item in raw:
        if isinstance(item, dict):
            row = _fee_row(item)
            if row:
                out.append(row)
    return out


def option_fee_lines(option: dict[str, Any] | None, quote: dict[str, Any] | None = None) -> list[tuple[str, str]]:
    """
    该线路 TMS 回了哪些费用就列哪些。

    只读本条 departureCharges / feeItems。多条线路时，整单 fee_lines 是最低价方案，
    禁止套到没回费用的线路。仅一条线路时，整单 fee_lines 才算这条的明细。
    """
    src = dict(option or {})
    rows = _rows_from_list(src.get("departureCharges") or src.get("departure_charges"))
    rows.extend(_rows_from_list(src.get("feeItems") or src.get("fee_items")))
    if rows:
        return rows
    q = dict(quote or {})
    options = parse_air_options(q)
    if len(options) > 1:
        return []
    return _rows_from_list(q.get("fee_lines") or q.get("fee_rows") or q.get("feeItems"))


def option_total(option: dict[str, Any] | None, quote: dict[str, Any] | None = None) -> str:
    """该线路总销售价。"""
    src = dict(option or {})
    q = dict(quote or {})
    raw = src.get("salePrice")
    if raw is None or str(raw).strip() == "":
        raw = q.get("total") or q.get("salePrice")
    ccy = str(src.get("currency") or q.get("currency") or "").strip()
    text = str(raw or "").strip() or "-"
    if ccy and text != "-" and ccy not in text:
        return f"{ccy} {text}"
    return text


def apply_selected_option(facts: dict[str, str] | None, option: dict[str, Any] | None) -> dict[str, str]:
    """选定线路后写回起运港（及能对上的三字码）。改选覆盖。"""
    merged = dict(facts or {})
    src = dict(option or {})
    code = str(src.get("originAirportCode") or src.get("origin") or "").strip().upper()
    name = _place_name(code)
    if name:
        merged["起运港"] = name
    if code and len(code) == 3 and code.isalpha():
        merged["originCode"] = code
    dest_code = str(src.get("destinationAirportCode") or "").strip().upper()
    dest_name = _place_name(dest_code, str(merged.get("目的港") or ""))
    if dest_name:
        merged["目的港"] = dest_name
    if dest_code and len(dest_code) == 3 and dest_code.isalpha():
        merged["destinationCode"] = dest_code
    return merged


def project_selected_quote(quote: dict[str, Any] | None, option: dict[str, Any] | None) -> dict[str, Any]:
    """把选中线路投影成价格卡用的 quote。"""
    base = dict(quote or {})
    src = dict(option or {})
    lines = [{"name": n, "amount": a} for n, a in option_fee_lines(src, base)]
    # 必须覆盖整单 fee_lines：空列表也要写回去，否则会残留别的线路空运费。
    base["fee_lines"] = lines
    if not lines:
        base["freight"] = "-"
        base["other_fee"] = "-"
    total = src.get("salePrice")
    if total is not None and str(total).strip() != "":
        base["total"] = str(total).strip()
    if src.get("currency"):
        base["currency"] = src.get("currency")
    if src.get("validUntil"):
        base["valid_until"] = src.get("validUntil")
    base["selected_air_option"] = src
    base["route_line"] = route_line(src, {})
    return base