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

export module Crafter.Review:Core;
import std;

export namespace Crafter::Review {
    // The release this binary was built from, as project.cpp stamped it:
    // CRAFTER_REVIEW_VERSION, else `git describe`, else 0.0.0-dev.
    std::string_view Version();

    // Bumped only when clean results stored under the earlier number must not
    // be reused: a text change a lens reads that changes what a clean pass
    // proves. It is one of the inputs of every reuse key, so a bump retires
    // every stored result at once. A change that leaves what a lens reads the
    // same — a layout change, a reworded log line — does not bump it.
    constexpr std::int32_t PromptVersion = 1;

    // `crafter-review <version> (prompt v<n>)`: the dump's `driver` field,
    // the first log line of a run and `--version`.
    std::string DriverLine();

    // How a person runs this binary, for the command lines it prints: `flatpak
    // run net.catcrafts.CrafterReview` in the Flatpak, the binary's absolute
    // path otherwise.
    std::string Invocation();

    // Where the lens texts, the procedure and the templates are: the
    // directory that holds process/. In this order:
    //  - CRAFTER_REVIEW_HOME, natively only: a host setting must not swap the
    //    Flatpak's lens texts for a checkout's, which would change every reuse
    //    key without a word;
    //  - <exe>/../share/crafter-review, which in the Flatpak is
    //    /app/share/crafter-review;
    //  - the checkout the binary was built in, when it runs from
    //    <checkout>/bin/crafter.review-exe-*/.
    // Throws std::runtime_error when none of them holds process/lenses.
    const std::filesystem::path& Home();
    // For tests, which run from neither place.
    void SetHome(std::filesystem::path home);
    // Home()/process/lenses.
    std::filesystem::path LensDir();
    // The sha256 of each lens file — the text read with universal newlines,
    // as UTF-8 — keyed by file name. Every charter's is part of its lens's
    // reuse keys, so --version and the run log print them: a stale home shows
    // up there before it shows up as nothing being reused.
    std::vector<std::pair<std::string, std::string>> CharterHashes();
}