// Logic test for the panel's `thinking` form ↔ request mapping (design/01 §2.1,
// v0.43 read side). The two rules it must not lose are the tri-state of
// `showToUser` (omitted = 未配置 = keep the current behavior; never flattened into
// `false`) and the omission rule: a form that configures nothing must leave the
// `thinking` key OUT of the body, because the write side reads an omitted object
// as "keep the stored block" (an all-default object would CLEAR it). The project
// has no frontend test runner and no jsdom, so this is a dependency-free
// plain-node check driving the real module (lib/personaThinking.ts) and throwing
// on the first failure.
//
// Run it with the esbuild that already ships with vite (no new dependency, no
// package.json change):
//
//   cd frontend/web \
//     && ./node_modules/.bin/esbuild src/lib/personaThinking.test.ts \
//          --bundle --platform=node --format=esm \
//          --outfile=/tmp/cyrene-persona-thinking.test.mjs \
//     && node /tmp/cyrene-persona-thinking.test.mjs
//
// `tsc --noEmit` (part of `npm run build`) type-checks this file, which is why it
// imports nothing from node:*.

import {
  EMPTY_THINKING_DRAFT,
  THINKING_EFFORTS,
  thinkingDraftFrom,
  thinkingDraftToRequest,
  thinkingValidationError,
  type PersonaThinking,
  type ThinkingDraft,
} from "./personaThinking";

let checks = 0;

function ok(cond: boolean, what: string): void {
  checks += 1;
  if (!cond) throw new Error(`FAILED: ${what}`);
}

function same(got: unknown, want: unknown, what: string): void {
  const g = JSON.stringify(got);
  const w = JSON.stringify(want);
  ok(g === w, `${what} — got ${g}, want ${w}`);
}

/* --- 1. Backfill from the read side ----------------------------------------- */

// An absent block (persona configures no thinking) reads as the empty draft.
same(thinkingDraftFrom(undefined), EMPTY_THINKING_DRAFT, "absent read block → empty draft");
same(thinkingDraftFrom(null), EMPTY_THINKING_DRAFT, "null read block → empty draft");

// A configured block backfills field by field, including the tri-state arm.
const read: PersonaThinking = { budgetTokens: 4096, effort: "high", showToUser: false, mode: "off" };
same(
  thinkingDraftFrom(read),
  { budgetTokens: "4096", effort: "high", showToUser: "off", mode: "off" },
  "configured block backfills (explicit false stays 关)"
);
same(
  thinkingDraftFrom({ budgetTokens: 0, effort: "", showToUser: null, mode: "" }),
  EMPTY_THINKING_DRAFT,
  "an all-unset read block backfills to the empty draft"
);
same(
  thinkingDraftFrom({ budgetTokens: 1024, effort: "", showToUser: null, mode: "" }),
  { budgetTokens: "1024", effort: "", showToUser: "unset", mode: "" },
  "null showToUser backfills as 未配置, not 关"
);
// An out-of-list stored value is preserved (never silently blanked).
same(
  thinkingDraftFrom({ budgetTokens: 0, effort: "tiny", showToUser: null, mode: "always" }).effort,
  "tiny",
  "an unknown stored effort is preserved for display"
);

/* --- 2. Form → request body, incl. tri-state and omission -------------------- */

// The omission rule: nothing configured → no `thinking` key at all on the wire.
const untouched = thinkingDraftToRequest(EMPTY_THINKING_DRAFT);
ok(untouched === undefined, "an untouched form maps to undefined (omit the block)");
same(
  JSON.stringify({ name: "昔涟", thinking: untouched }),
  JSON.stringify({ name: "昔涟" }),
  "an untouched form leaves no `thinking` key in the request body (省略保留)"
);
// …and a whitespace-only budget is still "untouched", not budget 0.
ok(
  thinkingDraftToRequest({ ...EMPTY_THINKING_DRAFT, budgetTokens: "  " }) === undefined,
  "a whitespace-only budget is treated as unconfigured"
);

// The tri-state of showToUser, verbatim on the wire.
const unset = thinkingDraftToRequest({ ...EMPTY_THINKING_DRAFT, budgetTokens: "2048" });
ok(unset !== undefined, "a budget-only form still maps to a request");
ok(!("showToUser" in (unset as object)), "showToUser:未配置 omits the key (stays nil, not false)");
same(unset?.showToUser, undefined, "showToUser:未配置 is undefined, never false");

const off = thinkingDraftToRequest({ ...EMPTY_THINKING_DRAFT, showToUser: "off" });
same(off, { showToUser: false }, "showToUser:关 maps to the boolean false");
same(JSON.stringify(off), JSON.stringify({ showToUser: false }), "an explicit false survives JSON.stringify");

const on = thinkingDraftToRequest({ ...EMPTY_THINKING_DRAFT, showToUser: "on" });
same(on, { showToUser: true }, "showToUser:开 maps to the boolean true");

// Every other knob maps only when set.
same(
  thinkingDraftToRequest({ budgetTokens: "4096", effort: "medium", showToUser: "unset", mode: "on" }),
  { budgetTokens: 4096, effort: "medium", mode: "on" },
  "set knobs map, unset ones are omitted"
);
same(
  thinkingDraftToRequest({ budgetTokens: "0", effort: "", showToUser: "unset", mode: "" }),
  { budgetTokens: 0 },
  "an explicit 0 budget is a configured value (0 = 未设 for the backend)"
);

/* --- 3. Round-trip: read → form → request ---------------------------------- */

// What the panel sends back for a persona it just loaded must describe the same
// stored block, so opening a persona and saving it changes nothing.
const cases: PersonaThinking[] = [
  { budgetTokens: 4096, effort: "high", showToUser: false, mode: "off" },
  { budgetTokens: 2048, effort: "", showToUser: null, mode: "" },
  { budgetTokens: 0, effort: "", showToUser: true, mode: "on" },
  { budgetTokens: 0, effort: "low", showToUser: null, mode: "default" },
];
for (const c of cases) {
  const back = thinkingDraftToRequest(thinkingDraftFrom(c));
  // Built in the mapper's own key order (JSON.stringify is order-sensitive here).
  const want: Record<string, unknown> = {};
  if (c.budgetTokens) want.budgetTokens = c.budgetTokens;
  if (c.effort) want.effort = c.effort;
  if (c.mode) want.mode = c.mode;
  if (c.showToUser !== null) want.showToUser = c.showToUser;
  same(back, want, `round-trip ${JSON.stringify(c)}`);
}

/* --- 4. Input validation (only what the client can know) -------------------- */

same(thinkingValidationError(EMPTY_THINKING_DRAFT), null, "empty draft is valid");
same(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, budgetTokens: "4096" }), null, "4096 is valid");
same(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, budgetTokens: "0" }), null, "0 is valid (non-negative)");
ok(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, budgetTokens: "-1" }) !== null, "a negative budget is rejected");
ok(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, budgetTokens: "1.5" }) !== null, "a fractional budget is rejected");
ok(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, budgetTokens: "4096t" }) !== null, "a non-numeric budget is rejected");
same(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, mode: "on" }), null, "mode on is valid");
same(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, mode: "default" }), null, "mode default is valid");
ok(
  thinkingValidationError({ ...EMPTY_THINKING_DRAFT, mode: "always" as ThinkingDraft["mode"] }) !== null,
  "an unknown mode is rejected"
);
for (const e of THINKING_EFFORTS) {
  same(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, effort: e }), null, `effort ${e} is valid`);
}
ok(thinkingValidationError({ ...EMPTY_THINKING_DRAFT, effort: "tiny" }) !== null, "an unknown effort is rejected");

// The panel must not claim a capability: no error is raised merely because the
// value may be unsupported by the *active* provider (the backend WARNs instead).
same(
  thinkingValidationError({ ...EMPTY_THINKING_DRAFT, effort: "none", mode: "off" }),
  null,
  "a provider-dependent combination is not blocked client-side"
);

console.log(`personaThinking: ${checks} checks passed`);