Crafter.Review/interfaces/Crafter.Review-Seats.cppm

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®

export module Crafter.Review:Seats;
import std;
import :Json;

// How much usage each Claude seat has left: the dotenv loader, the one-word
// probe, the window maths, the ranking and the report. The seat pool
// (:SeatPool) places on these; `crafter-review seats` prints the report (its
// glue, which needs the ledger and the board, is in :Driver).
//
// Seats are CLAUDE_CODE_OAUTH_TOKEN1..6 by fixed name (the legacy
// CLAUDE_CODE_OAUTH_TOKEN is seat 1 when TOKEN1 is empty), API-credit seats
// ANTHROPIC_API_KEY1..6, OpenRouter seats OPENROUTER_KEY[1..6]; never printed:
// the table and the JSON carry indices and percentages only. A probe result
// and a seat are JSON: the dump and --json show them.
export namespace Crafter::Review::Seats {
    constexpr std::int32_t MaxSeats = 6;
    constexpr std::string_view ProbeModel = "haiku";
    // The Fable weekly limit is a window of its own, reported ONLY in the
    // rate_limit_event of a Fable request (verified 2026-09-08). The CLI has
    // named it seven_day_overage_included and seven_day_fable; either lands
    // under the canonical key.
    constexpr std::string_view FableProbeModel = "claude-fable-5-1";
    constexpr std::string_view FableWindow = "seven_day_overage_included";
    constexpr double ProbeTimeoutS = 30;
    // Fixed rules, not knobs: utilisation is rounded to RankQuantum before
    // ranking, and a seat whose 7-day window is at or above LongWindowCutoff is
    // out regardless — its reset is days away. The Fable window is exempt here.
    constexpr std::int32_t RankQuantum = 5;
    constexpr std::int32_t LongWindowCutoff = 95;

    // JavaScript's Math.round: halves go up, never to even.
    double JsRound(double x);
    // A number the way a JS template prints it: 5 not 5.0, 62.5 as is.
    std::string Fmt(const Json& value);

    // {maxUtil, lensCostPct, waitMaxMin, policy, handoverPct}: the placement
    // knobs; garbage leaves the default.
    Json DefaultConfig();
    Json ConfigFromEnv(const std::map<std::string, std::string>& env);
    std::vector<std::pair<std::int32_t, std::string>> SeatTokensFromEnv(const std::map<std::string, std::string>& env);
    std::vector<std::pair<std::int32_t, std::string>> ApiKeysFromEnv(const std::map<std::string, std::string>& env);
    std::vector<std::pair<std::int32_t, std::string>> OpenRouterKeysFromEnv(const std::map<std::string, std::string>& env);
    // Only the seat lines of a dotenv file; `export` and quotes stripped,
    // everything else ignored.
    std::map<std::string, std::string> SeatTokensFromEnvFile(std::string_view text);

    // The CLI's fraction as a percent, past 100 for a seat over its limit.
    Json Pct(const Json& utilization);
    // {status, rateLimitType, resetsAt, windows, overageReason}, or null.
    Json ParseRateLimitInfo(const Json& raw);
    // The last result line, the last rate_limit_event and the session id.
    Json ParseStream(std::string_view text);

    std::vector<std::string> ProbeArgs(std::string_view model = ProbeModel);
    // The probe child's whole environment: one token under the name the CLI
    // reads, an isolated config dir, thinking off, no nonessential traffic, no
    // updater, and none of the other pool tokens.
    std::map<std::string, std::string> ProbeEnv(std::string_view token, const std::string& configDir, const std::map<std::string, std::string>& base);
    // The CLI's own login: no token or API key from the environment.
    std::map<std::string, std::string> LocalEnv(const std::map<std::string, std::string>& base);
    // The key's approval in the config dir's .claude.json, once.
    std::filesystem::path WriteApiKeyApproval(const std::filesystem::path& configDir, std::string_view key);
    std::map<std::string, std::string> ApiEnv(std::string_view key, const std::string& configDir, const std::map<std::string, std::string>& base);
    bool LooksLikeCreditExhaustion(const Json& result, std::string_view text);
    bool LooksLikeAuthFailure(const Json& result, std::string_view text);
    // One line, at most 160 characters, the seat's own secrets and anything
    // token-shaped redacted.
    std::string ClipReason(std::string_view text, std::span<const std::string> secrets = {});

    struct ProbeOptions {
        std::string model = std::string(ProbeModel);
        double timeoutS = ProbeTimeoutS;
        std::string claudeBin;
        bool local = false;
        bool api = false;
    };
    // One probe of one seat: {seat, probedWith, windows, state: ok | limited |
    // unknown | invalid | out, util, binding, resetsAt, error, costUsd}.
    Json ProbeSeat(std::int32_t seat, const std::string& token, const ProbeOptions& options);

    double Quantize(double util);
    // The most-used window and its utilisation, raw.
    std::pair<Json, std::string> BindingWindow(const Json& windows);
    // Quantised for ranking.
    std::pair<Json, std::string> SeatUtil(const Json& windows);
    std::string ModelFamily(std::string_view model);
    bool IsFableWindow(std::string_view key);
    const Json* FableWindowOf(const Json& seat);
    bool LongWindowsOk(const Json& seat);
    bool IsEligible(const Json& seat, const Json& config);
    bool FableOpen(const Json& seat, const Json& config);
    Json PickNext(const std::vector<Json>& seats, const Json& config);
    bool NeedsHaiku(const Json& seat);
    std::string FableState(const Json& fable);
    Json MergeFableProbe(Json base, const Json& fable);

    // Where the CLI is: CLAUDE_BIN / REVIEW_GATES_CLAUDE_BIN, then PATH, then
    // the editor extensions' bundled binary (newest first), then the
    // standalone installs. The bare name when nothing is found.
    std::string FindClaudeBin(const std::map<std::string, std::string>& env, const std::string& home);
    std::string FindClaudeBin();

    // The report's zone: $TZ, else /etc/localtime. A zone by name, as
    // zoneinfo reads it (this libc++ has no tzdb, so the C library converts,
    // with TZ set to the name); an empty name is the process's own zone.
    struct Zone {
        std::string name;
        std::string label;
    };
    Zone LocalZone();
    Zone ZoneNamed(std::string_view name);
    // "02:40 (in 1h 50m)"; more than a day out with its date: "Wed 16 Sept,
    // 11:00 (in 6d 10h)".
    std::string FormatWhen(double epoch, double now, const Zone& zone);
    std::string RenderTable(const std::vector<std::vector<std::string>>& rows);
    std::string RenderStatusReport(const std::vector<Json>& seats, const Json& config, double now, const Zone& zone, const Json& board = nullptr,
                                   const std::map<std::int32_t, std::string>& keys = {});
    std::string RenderApiReport(const std::vector<Json>& apiSeats, const Json& apiConfig, const Json& board = nullptr,
                                const std::map<std::int32_t, std::string>& keys = {});
    std::string RenderDrivers(const Json& board, double now, const Zone& zone);
}