import { test } from "node:test";
import assert from "node:assert/strict";
import { toContentJson, fromContentJson } from "../src/views/flow/admin/def-editor/convert";
import { createApproval, createCondition, createNotify, createParallel } from "../src/views/flow/admin/def-editor/model";
import type { EditorItem, EditorModel } from "../src/views/flow/admin/def-editor/model";

/**
 * 流程定义序列化回归闸门（任务书 §6.8「检查流程定义序列化」）。
 * 本轮只动编辑器面板的**展示分层**，这里钉住：结构语义不因这些改动漂移。
 * 对比口径按语义集合比（节点字段集 + 边三元组集），不比数组顺序——空泳道会产生纯顺序差。
 */

type Json = ReturnType<typeof toContentJson>;

function model(items: EditorItem[]): EditorModel {
    return {
        code: "rt-demo",
        name: "往返回归",
        list: items,
        settings: { rejectPolicy: "END_REJECTED", urge: { enabled: true, intervalHours: 24, maxTimes: 3 } },
    };
}

const clone = (o: unknown) => JSON.parse(JSON.stringify(o));

function fullItems(): EditorItem[] {
    const approval = createApproval("科室审核", { type: "DEPT_KEY", deptKey: "41" });
    approval.countersign = "ALL";
    approval.deadlineHours = 8;
    approval.assignPolicy = { mode: "SINGLE", required: true };

    const outletNode = createApproval("多出口", { type: "USERS", userIds: [101, 102] });
    outletNode.outlets = ["同意", "退回", "加签"];
    outletNode.branches = [[createApproval("分支一")], [], [createNotify("分支三抄送")]];

    const cond = createCondition();
    cond.judgeMode = "EXPRESSION";
    cond.outlets = ["大额", "小额"];
    cond.conditions = ["amount > 1000", ""];
    cond.branches = [[createApproval("大额复核")], [createApproval("小额直过")]];

    const par = createParallel();
    par.branches = [[createNotify("并行抄送A")], [createApproval("并行复核B", { type: "DEPT_KEY", deptKey: "42" })]];

    return [approval, cond, par, outletNode];
}

/** 已知缺陷用：非首位并行容器重解析后 split/join 会换成新 id（见最后一条用例） */
function parallelDerivedIds(json: Json): string[] {
    return json.nodes.filter((n) => n.type === "PARALLEL_SPLIT" || n.type === "PARALLEL_JOIN").map((n) => n.id);
}

function roundTrip(times: number, json: Json): Json {
    let cur = json;
    for (let i = 0; i < times; i++) {
        cur = toContentJson({ ...model([]), ...fromContentJson(clone(cur)) } as EditorModel);
    }
    return cur;
}

test("结构往返两轮：每个节点的配置语义逐项一致（并行派生 id 另用例专门记录）", () => {
    const first = toContentJson(model(fullItems()));
    const second = roundTrip(1, first);
    const third = roundTrip(2, first);

    const byId = (json: Json) => {
        const m = new Map<string, string>();
        json.nodes.forEach((n) => m.set(n.id, JSON.stringify(n)));
        return m;
    };
    const a = byId(first);
    const b = byId(second);
    const c = byId(third);

    // 配置类节点（审批/抄送/条件）的 id 与内容必须逐字不变
    ["u1", "u2", "u3", "u4", "u5c", "u8", "u9", "start", "end"].forEach((id) => {
        assert.equal(b.get(id), a.get(id), `节点 ${id} 内容在第二轮发生变化`);
        assert.equal(c.get(id), a.get(id), `节点 ${id} 内容在第三轮发生变化`);
    });
    assert.deepEqual(second.settings, first.settings);
    assert.deepEqual(third.settings, first.settings);

    // 并行分支内的两名办理人同样不变
    const branchIds = ["u13", "u14"];
    branchIds.forEach((id) => assert.equal(b.get(id), a.get(id), `并行分支节点 ${id} 变化`));

    // 出口边（含条件表达式）在两轮都存在
    const edgeSet = (json: Json) => new Set(json.edges.map((e) => `${e.from}->${e.to}${e.name ? `(${e.name})` : ""}${e.condition ? `[${e.condition}]` : ""}`));
    const ea = edgeSet(first);
    const eb = edgeSet(second);
    ["u2->u3(同意)", "u2->u4(加签)", "u2->end(退回)", "u5c->u8(大额)[amount > 1000]", "u5c->u9(小额)"].forEach((e) => {
        assert.ok(ea.has(e), `第一轮缺少边 ${e}`);
        assert.ok(eb.has(e), `第二轮缺少边 ${e}`);
    });
});

test("关键语义字段全部活过往返，不被展示层分层影响", () => {
    const first = toContentJson(model(fullItems()));
    const parsed = fromContentJson(clone(first));
    const second = toContentJson({ ...model([]), ...parsed } as EditorModel);

    // 会签 ALL 是后端缺省值，生成 JSON 时按设计省略（model.ts 注释）；口径以解析回编辑态为准
    const approvalItem = parsed.list.find((it) => it.kind === "approval" && it.assignee?.type === "DEPT_KEY");
    assert.ok(approvalItem && approvalItem.kind === "approval");
    assert.equal(approvalItem.countersign, "ALL", "会签语义在解析端丢失");
    assert.equal(approvalItem.deadlineHours, 8, "办理时限丢失");
    assert.deepEqual(approvalItem.assignPolicy, { mode: "SINGLE", required: true }, "发起时指派策略丢失");

    assert.ok(second.nodes.some((n) => n.type === "NOTIFY" && n.receivers?.type === "USERS"), "抄送对象丢失");
    assert.ok(second.nodes.some((n) => n.judgeMode === "EXPRESSION"), "条件判断方式丢失");
    assert.ok(second.nodes.some((n) => n.type === "PARALLEL_SPLIT"), "并行拆分丢失");
    assert.ok(second.nodes.some((n) => n.type === "PARALLEL_JOIN" && n.waitFor === "ALL"), "并行汇聚语义丢失");
    assert.ok(second.nodes.some((n) => n.id === "start") && second.nodes.some((n) => n.id === "end"), "端点丢失");
    assert.ok(second.edges.filter((e) => e.name).length >= 3, "多出口/条件分支的出口名丢失");
});

test("设置与端点名不被丢：rejectPolicy/urge/start-end name 原样回写", () => {
    const m = model([createApproval("单节点")]);
    m.startName = "提交申请";
    m.endName = "办结";
    const json = toContentJson(m);
    assert.equal(json.settings.rejectPolicy, "END_REJECTED");
    assert.equal(json.settings.urge.intervalHours, 24);
    assert.equal((json.nodes.find((n) => n.type === "START") || {}).name, "提交申请");
    assert.equal((json.nodes.find((n) => n.type === "END") || {}).name, "办结");
});

test("已知缺陷（本轮不修，修它等于改序列化契约）：并行容器重解析后 split/join 换成新 id", () => {
    const first = toContentJson(model([createApproval("a"), createParallel()]));
    const before = parallelDerivedIds(first);
    const rt = roundTrip(1, first);
    const after = parallelDerivedIds(rt);

    assert.equal(after.length, before.length, "并行拆/合节点数量发生变化");
    assert.notDeepEqual(after, before, "并行 id 改名行为已变化——若已被修好，请把本用例改成断言 id 稳定并同步终审");

    // 改名只涉及 id 字面，汇聚语义不变
    const join = rt.nodes.find((n) => n.type === "PARALLEL_JOIN");
    assert.equal(rt.nodes.filter((n) => n.type === "PARALLEL_SPLIT").length, 1);
    assert.equal(join?.waitFor, "ALL", "并行汇聚 waitFor 语义丢失");
    // 拆分/汇聚与分支节点的连接关系仍然闭合（每个分支节点都连到某条 split/join）
    const anchors = new Set(after);
    const linked = rt.edges.filter((e) => anchors.has(e.from) || anchors.has(e.to));
    assert.ok(linked.length >= 4, `并行连线丢失，只剩 ${linked.length} 条`);
});