import type { MarkupRule } from "@/modules/pricing/engine";
import { applyMarkup } from "@/modules/pricing/engine";
import type { Priority1QuoteLine } from "@/workers/rpa/priority1/quote-extract";

export type Priority1DisplayMode = "ltl_cards" | "ftl_calendar";

export type Priority1DisplayLine = Priority1QuoteLine & {
  markup_amount: number;
  final_total_usd: number;
};

export type Priority1StoredQuotes = {
  provider: "priority1";
  display_mode: Priority1DisplayMode;
  lines: Priority1DisplayLine[];
};

export function inferPriority1DisplayMode(
  lines: Priority1QuoteLine[],
  shipmentType?: string,
): Priority1DisplayMode {
  if (shipmentType === "ftl") {
    return "ftl_calendar";
  }
  if (
    lines.some(
      (l) =>
        l.source === "ftl-calendar" ||
        /ftl\s*calendar/i.test(l.serviceLevel) ||
        l.carrier.includes("FTL 日历"),
    )
  ) {
    return "ftl_calendar";
  }
  return "ltl_cards";
}

export function applyMarkupToPriority1Lines(
  lines: Priority1QuoteLine[],
  rule: MarkupRule,
): Priority1DisplayLine[] {
  return lines.map((line) => {
    const { markupAmount, finalTotal } = applyMarkup(
      line.totalUsd,
      line.totalUsd,
      rule,
    );
    return {
      ...line,
      markup_amount: markupAmount,
      final_total_usd: finalTotal,
    };
  });
}

export function buildPriority1StoredQuotes(
  lines: Priority1QuoteLine[],
  rule: MarkupRule,
  shipmentType?: string,
): Priority1StoredQuotes {
  const marked = applyMarkupToPriority1Lines(lines, rule);
  return {
    provider: "priority1",
    display_mode: inferPriority1DisplayMode(lines, shipmentType),
    lines: marked,
  };
}

export function parsePriority1StoredQuotes(
  json: unknown,
): Priority1StoredQuotes | null {
  if (!json || typeof json !== "object" || Array.isArray(json)) {
    return null;
  }
  const o = json as Record<string, unknown>;
  if (o.provider !== "priority1" || !Array.isArray(o.lines)) {
    return null;
  }
  return o as unknown as Priority1StoredQuotes;
}

/** 从 pickupJson 读取 Priority1 填单上下文 */
export function readPriority1ShipmentMeta(
  pickupJson: unknown,
): { shipmentType?: string; pickupDate?: string; commodity?: string } {
  if (!pickupJson || typeof pickupJson !== "object") {
    return {};
  }
  const o = pickupJson as Record<string, unknown>;
  return {
    shipmentType:
      typeof o.priority1_shipment_type === "string"
        ? o.priority1_shipment_type
        : undefined,
    pickupDate:
      typeof o.priority1_pickup_date === "string"
        ? o.priority1_pickup_date
        : undefined,
    commodity:
      typeof o.priority1_commodity === "string"
        ? o.priority1_commodity
        : undefined,
  };
}

type LegacyQuoteTierRow = {
  service_level?: string;
  rate_option?: string;
  carrier?: string;
  transit_days?: string;
  raw_total?: number;
  final_total?: number;
  markup_amount?: number;
};

/** 旧版 MotherShip tier 数组 → Priority1 展示行（兼容未升级的 worker / stale 降级） */
export function legacyTiersToPriority1StoredQuotes(
  tiers: LegacyQuoteTierRow[],
  shipmentType?: string,
): Priority1StoredQuotes | null {
  const lines: Priority1DisplayLine[] = [];
  for (const tier of tiers) {
    const raw = Number(tier.raw_total ?? tier.final_total ?? 0);
    const final = Number(tier.final_total ?? tier.raw_total ?? 0);
    if (!Number.isFinite(raw) || raw <= 0) continue;
    lines.push({
      rank: lines.length + 1,
      carrier: String(tier.carrier ?? "Unknown").trim() || "Unknown",
      carrierCode: "",
      totalUsd: raw,
      markup_amount: Number(tier.markup_amount ?? Math.max(0, final - raw)) || 0,
      final_total_usd: final > 0 ? final : raw,
      transitDays: Number.parseInt(String(tier.transit_days ?? ""), 10) || 0,
      deliveryDate: null,
      expirationDate: null,
      serviceLevel: "STANDARD LTL",
      quoteId: null,
      caboUrl: null,
      source: "legacy-tier",
    });
  }
  if (lines.length === 0) return null;
  return {
    provider: "priority1",
    display_mode: inferPriority1DisplayMode(lines, shipmentType),
    lines,
  };
}

function isLegacyQuoteTierArray(json: unknown): json is LegacyQuoteTierRow[] {
  if (!Array.isArray(json) || json.length === 0) return false;
  const row = json[0];
  if (!row || typeof row !== "object") return false;
  const o = row as Record<string, unknown>;
  return (
    typeof o.service_level === "string" &&
    (typeof o.raw_total === "number" || typeof o.final_total === "number")
  );
}

/** 从 DB quotesJson 解析 Priority1 展示数据（含旧 tier 兼容） */
export function resolvePriority1StoredQuotes(
  quotesJson: unknown,
  pickupJson?: unknown,
): Priority1StoredQuotes | null {
  const stored = parsePriority1StoredQuotes(quotesJson);
  if (stored && stored.lines.length > 0) {
    return stored;
  }
  const meta = readPriority1ShipmentMeta(pickupJson);
  // MotherShip tier 数组与 Priority1 旧 tier 结构相似；仅 Priority1 询价上下文才做 legacy 转换
  if (!meta.shipmentType) {
    return null;
  }
  if (isLegacyQuoteTierArray(quotesJson)) {
    return legacyTiersToPriority1StoredQuotes(quotesJson, meta.shipmentType);
  }
  return null;
}