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

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

// The consumer's configuration: `.review-gates/config.json` at the
// repository root (`--config` names another file). It holds what the
// pipeline must know about THIS repository — who may author its commits,
// which branch a range is measured against, which lenses run and the
// environment each gets, how its application is started and reached, where
// its local database answers, which paths carry no runtime behaviour — and
// nothing about any one review. A missing file is the defaults; an unknown
// key or a malformed value is a preflight failure, and a retired key a
// warning. The config stays the JSON it was read as, keys in their order.
export namespace Crafter::Review::Config {
    constexpr std::string_view ConfigDir = ".review-gates";
    constexpr std::string_view ConfigFile = ".review-gates/config.json";
    constexpr std::string_view SlotFile = "slot.json";

    // DEFAULTS, a fresh copy each call.
    Json Defaults();

    struct Loaded {
        Json config;
        std::vector<std::string> problems;
    };
    // The defaults, the file's values merged over them, and every problem
    // Validate finds. A retired key is no problem: it is dropped, and
    // config["_warnings"] says so and what replaced it — a key the pipeline
    // stopped reading must not stop a consumer's freeze or run (2026-10-22).
    // `path` empty: <repo>/.review-gates/config.json.
    Loaded Load(const std::filesystem::path& repo, const std::filesystem::path& path = {});
    std::vector<std::string> Validate(const Json& config);
    // The config for a dump: the database URL with its password masked, no
    // `_` bookkeeping keys.
    Json Redacted(const Json& config);
    // The emails the freeze accepts as author and committer: the configured
    // list; none (null, or no `authors` key) - the freeze checks neither.
    std::optional<std::vector<std::string>> Authors(const Json& config);
    // The lens files no mode lists (what runs nowhere: the slots and init).
    std::vector<std::string> LensesOff(const Json& config);
    // {lens file: environment} for every lens of the table, as the config
    // holds it (validated elsewhere).
    Json Environments(const Json& config);

    struct Slots {
        // pool.Stacks entries {id, appUrl, apiUrls, dbUrl, login, slot: true},
        // in slot order.
        Json stacks = Json::array();
        std::vector<std::string> problems;
    };
    // The slots that are up: slots.dir/<n>/slot.json.
    Slots SlotStacks(const Json& config, const std::filesystem::path& repo);
    // slots.start or slots.stop for the slot numbers given, {n} filled.
    std::vector<std::string> SlotCommands(const Json& config, std::string_view which, std::span<const std::int64_t> slots);
    // The first login fixture that exists, relative to the repository root.
    std::optional<std::string> LoginFixture(const Json& config, const std::filesystem::path& repo);
    // The repository's own lens sections (`lenses.<name>.section`, resolved
    // against the repository root), keyed by lens file: each a file the
    // config names inside the repository (a relative path, no `..` part).
    std::map<std::string, std::filesystem::path> LensSectionsOf(const Json& config, const std::filesystem::path& repo);
    // What is wrong with those files: one missing, or one
    // Prompt::ReadSection cannot use.
    std::vector<std::string> SectionProblems(const Json& config, const std::filesystem::path& repo);
    // A mode as the config defines it (modes.<name>, 2026-11-01): the
    // artifact kind it reviews, the lens files it runs in the table's order,
    // and the effort it runs at when set. nullopt: no such mode, or one
    // whose kind or lens list cannot be read; lenient on the rest Validate
    // refuses (a lens of another kind dropped, an unknown effort kept),
    // which no command reaches: each stops on the config's problems first.
    struct Mode {
        std::string name;
        std::string kind;
        std::vector<std::string> lensFiles;
        std::optional<std::string> effort;
    };
    std::optional<Mode> ModeOf(const Json& config, std::string_view name);
    // The configured mode names, in the config's order.
    std::vector<std::string> ModeNames(const Json& config);
    // The lens files of the mode's kind that the mode does not list.
    std::vector<std::string> LensesOff(const Json& config, std::string_view mode);
    // The example a consumer starts from (process/templates/config.json is
    // this, rendered).
    Json Example();

    // `crafter-review [--config F] config`: the merged config, its warnings
    // and its problems; exit 1 when there is a problem.
    std::int32_t Main(const std::filesystem::path& repo, const std::filesystem::path& path);
}