import { describe, expect, it } from "vitest";

import type { ForeshadowView } from "@/lib/api/types";
import {
  buildRegisterRequest,
  buildTransitionRequest,
  extractReason,
  groupByStatus,
  isWindowApproaching,
  validationReasonMessage,
} from "./board";

const view = (over: Partial<ForeshadowView>): ForeshadowView => ({
  code: "F-001",
  title: "线索",
  status: "OPEN",
  ...over,
});

describe("groupByStatus", () => {
  it("splits items into four lanes preserving order", () => {
    const lanes = groupByStatus([
      view({ code: "F-001", status: "OPEN" }),
      view({ code: "F-002", status: "OVERDUE" }),
      view({ code: "F-003", status: "OPEN" }),
      view({ code: "F-004", status: "CLOSED" }),
      view({ code: "F-005", status: "PARTIAL" }),
    ]);
    expect(lanes.OPEN.map((v) => v.code)).toEqual(["F-001", "F-003"]);
    expect(lanes.OVERDUE.map((v) => v.code)).toEqual(["F-002"]);
    expect(lanes.CLOSED.map((v) => v.code)).toEqual(["F-004"]);
    expect(lanes.PARTIAL.map((v) => v.code)).toEqual(["F-005"]);
  });

  it("falls back unknown status to OPEN and handles undefined", () => {
    const lanes = groupByStatus([view({ status: "WEIRD" })]);
    expect(lanes.OPEN).toHaveLength(1);
    expect(groupByStatus(undefined).OPEN).toEqual([]);
  });
});

describe("isWindowApproaching", () => {
  it("is true when current chapter is inside [from,to] for OPEN/PARTIAL", () => {
    const f = view({
      status: "PARTIAL",
      expected_close_from: 40,
      expected_close_to: 60,
    });
    expect(isWindowApproaching(f, 50)).toBe(true);
    expect(isWindowApproaching(f, 39)).toBe(false);
    expect(isWindowApproaching(f, 61)).toBe(false);
  });

  it("never flags CLOSED/OVERDUE or items without a window", () => {
    expect(
      isWindowApproaching(
        view({ status: "CLOSED", expected_close_to: 60 }),
        50,
      ),
    ).toBe(false);
    expect(isWindowApproaching(view({ status: "OPEN" }), 50)).toBe(false);
  });
});

describe("buildRegisterRequest", () => {
  it("trims and omits empty optionals", () => {
    expect(
      buildRegisterRequest({
        projectId: "p1",
        code: "  F-007 ",
        title: " 旧誓约 ",
        content: "  ",
        expectedCloseTo: 110,
      }),
    ).toEqual({ code: "F-007", title: "旧誓约", expected_close_to: 110 });
  });

  it("keeps numeric and non-empty string optionals", () => {
    expect(
      buildRegisterRequest({
        projectId: "p1",
        code: "F-1",
        title: "t",
        plantedAt: 8,
        content: "线索",
        expectedCloseFrom: 40,
        importance: "主线",
      }),
    ).toEqual({
      code: "F-1",
      title: "t",
      planted_at: 8,
      content: "线索",
      expected_close_from: 40,
      importance: "主线",
    });
  });
});

describe("buildTransitionRequest", () => {
  it("includes only provided fields", () => {
    expect(buildTransitionRequest({ projectId: "p1", toStatus: "PARTIAL" })).toEqual({
      to_status: "PARTIAL",
    });
    expect(
      buildTransitionRequest({
        projectId: "p1",
        progressEntry: { chapter: 23, note: "发光" },
      }),
    ).toEqual({ progress_entry: { chapter: 23, note: "发光" } });
    expect(buildTransitionRequest({ projectId: "p1" })).toEqual({});
    expect(
      buildTransitionRequest({ projectId: "p1", progressEntry: {} }),
    ).toEqual({});
  });
});

describe("validationReasonMessage / extractReason", () => {
  it("maps known reasons to friendly text", () => {
    expect(validationReasonMessage("duplicate")).toContain("已存在");
    expect(validationReasonMessage("invalid_transition")).toContain("终态");
    expect(validationReasonMessage("empty_update")).toContain("进展");
    expect(validationReasonMessage("invalid_status")).toContain("筛选");
    expect(validationReasonMessage(undefined)).toContain("校验");
  });

  it("extracts details.reason from envelope", () => {
    expect(
      extractReason({ error: { details: { reason: "duplicate" } } }),
    ).toBe("duplicate");
    expect(extractReason({ error: { details: null } })).toBeUndefined();
    expect(extractReason("oops")).toBeUndefined();
  });
});