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

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

// The lens table, the unit kinds, pass planning, the mechanical n/a, the
// process budgets, the reuse keys and the cost estimate. A unit is the
// inventory's object ({id, lines, excerpt}) and a job the object PlanLens
// builds, both kept as JSON with their keys in a fixed order: the dump,
// progress.json and the prompts are made from them.
export namespace Crafter::Review::Plan {
    constexpr std::string_view FunctionalLens = "repo-functional.md";
    // The reasoning effort when --effort is not given (2026-10-02: the push
    // gates run at xhigh).
    constexpr std::string_view Effort = "xhigh";
    // Clean reads a code unit of a lens marked `reads` needs before its
    // verdict is reused, one per round (--reads). 2026-10-06: a static lens
    // is not deterministic — a second and third read of unchanged code still
    // found defects; "3 is fine".
    constexpr std::int32_t Reads = 3;
    // The key's last slot held the run's effort from 2026-09-22 to
    // 2026-10-02; it is frozen at the value every stored verdict was built
    // with, so a clean verdict bought at one effort is reused at any other
    // (Jorijn, 2026-10-02).
    constexpr std::string_view ReuseKeyEffortSlot = "max";

    // The model of each lens tier; every lens on Opus 5.5 (2026-09-25), and
    // `--models fable=claude-fable-5-1` splits them. In table order: opus,
    // fable.
    struct ModelTier {
        std::string tier;
        std::string id;
    };
    std::vector<ModelTier>& Models();
    // MODELS[tier]; Dyn::Error (KeyError) for an unknown tier.
    const std::string& ModelFor(std::string_view tier);

    constexpr std::array<std::string_view, 2> ApproachSlots = {"whole:order", "whole:absent"};
    constexpr std::array<std::string_view, 1> BehaviourSlots = {"whole:behaviour"};
    constexpr std::array<std::string_view, 1> CodeBlocks = {"code"};

    // One row of LENSES. whole: "" (none), "first-repo" (the approach) or
    // "functional" (the range exercised in the running application); every
    // whole pass gates the lens's block passes and covers the slots named in
    // `slots`. block: the unit kinds the lens zooms into. reuse: per-unit reuse
    // across hashes; wholeReuse: the clean whole pass carries while the code
    // of the range is unchanged. key: what a block is keyed on — "code" (its
    // own hunk and the base; 2026-10-06) or "functional" (its hunk AND the
    // code of the whole range: what the browser shows for a hunk depends on
    // every other hunk). reads: the lens's code units need Reads clean reads.
    // empirical: the lens's evidence is observation, so it needs an
    // environment with an application under test, and a whole pass that never
    // used the instrument is not evidence. perCommitSlots false: the lens
    // judges the per-commit slots in its whole pass. env: the default
    // environment; a verdict bought in any other carries it in its key.
    struct Lens {
        std::string_view file;
        std::int32_t gate;
        std::string_view whole;
        std::span<const std::string_view> slots;
        std::span<const std::string_view> block;
        std::string_view model;
        bool reuse;
        bool wholeReuse;
        bool reads;
        std::string_view key;
        bool empirical;
        bool perCommitSlots;
        std::string_view env;
    };
    // In the order the dump and the prompts list them.
    constexpr std::array<Lens, 4> Lenses = {{
        {"repo-better-solution.md", 1, "first-repo", ApproachSlots, CodeBlocks, "fable", true, true, true, "code", false, true, "none"},
        {FunctionalLens, 2, "functional", BehaviourSlots, CodeBlocks, "opus", true, true, false, "functional", true, false, "browser"},
        {"repo-bug-prover.md", 3, "", {}, CodeBlocks, "opus", true, false, true, "code", false, true, "none"},
        // The security lens (2026-10-22): does the range's code keep the
        // protections the repository promises? The bug-prover's shape beside
        // it in Gate 3: one gate stop for both proofs.
        {"repo-security.md", 3, "", {}, CodeBlocks, "opus", true, false, true, "code", false, true, "none"},
    }};
    bool IsLens(std::string_view file);
    // LENSES[file]; Dyn::Error (KeyError) for a file that is no lens.
    const Lens& LensOf(std::string_view file);

    struct Gate {
        std::string_view title;
        std::vector<std::string_view> lenses;
    };
    const std::vector<Gate>& Gates();

    // What a lens's processes get beyond the read-only tools, by the
    // consumer's lenses.<name>.environment: mcp, the server rendered into
    // --mcp-config ("" for none); tools, allowlist entries; app, the lens
    // drives the application under test; db, the lens runs SQL in the
    // database under test; memMb, what a pass is admitted at before one is
    // measured. A new entry must first bring seven things (the environment in
    // the reuse keys, its prompt texts, its own fail-closed check, validation,
    // DENY, the opencode refusal, a firing proof); the tests hold the table at
    // these four until then.
    //
    // memMb: the highest peak PSS of a pass's own process tree measured
    // 2026-10-22 on the first consumer — the claude process alone 158-208 MB;
    // with the browser 385-840 MB (Chromium 554-568, claude 208, the Playwright
    // server 112-118, the SQL helper 5-9).
    constexpr std::int32_t MemNone = 210;
    constexpr std::int32_t MemBrowser = 840;
    constexpr std::array<std::string_view, 1> BrowserTools = {"Bash(curl:*)"};
    struct Environment {
        std::string_view name;
        std::string_view mcp;
        std::span<const std::string_view> tools;
        bool app;
        bool db;
        std::int32_t memMb;
    };
    constexpr std::array<Environment, 4> Environments = {{
        {"none", "", {}, false, false, MemNone},
        {"browser", "playwright", BrowserTools, true, false, MemBrowser},
        {"supabase", "", {}, false, true, MemNone},
        {"browser+supabase", "playwright", BrowserTools, true, true, MemBrowser},
    }};
    // nullptr for a name that is no environment.
    const Environment* FindEnvironment(std::string_view name);

    // The environment in a reuse key: evidence bought in one environment is
    // never reused in another. The lens's default adds nothing, so every
    // verdict stored before 2026-10-22 keeps its key. Empty `environment`:
    // the default.
    std::vector<std::string> EnvDeps(std::string_view lensFile, std::string_view environment = {});

    // (max_turns, timeout_min) of a pass. Caps are safety nets, never retried
    // (2026-09-17: a max-turns retry re-buys the whole context). A functional
    // pass spends turns on the browser and gets more.
    struct Budget {
        std::int32_t maxTurns;
        std::int32_t timeoutMin;
    };
    Budget BudgetFor(std::string_view kind, std::string_view unitKind, std::string_view lensFile);

    std::string_view DefaultEffort();
    // "slot", "code" or "text".
    std::string_view UnitKind(const Json& unit);
    std::string_view UnitKindOf(std::string_view unitId);
    // A hunk, a part of a hunk or the file header of a documentation file.
    bool IsDocUnit(std::string_view unitId);
    // `\.md$`, case-insensitively: a documentation file (plan.DOC_PATH and
    // inventory.DOC_FILE, the same pattern).
    bool IsDocPath(std::string_view path);
    // The unit's kind for a lens: a documentation file's units are "doc".
    std::string_view KindFor(std::string_view lensFile, const Json& unit);
    // The file a hunk or file-header unit belongs to; nullopt for a slot or a
    // text unit.
    std::optional<std::string> UnitPath(std::string_view unitId);
    // The units no lens of `lensFiles` (the lenses that run) plans a whole or
    // block pass on. A mechanical n/a is not a reading.
    std::vector<std::string> NotReviewed(const Json& units, std::span<const std::string> lines, std::span<const std::string> lensFiles,
                                         std::span<const std::string> exclude = {});
    // The first glob of functional.exclude the path matches (`**/` prefixes
    // match at the root too).
    std::optional<std::string> ExcludedBy(std::string_view path, std::span<const std::string> globs);
    std::string UnitText(std::span<const std::string> lines, const Json& unit);
    // sha256 of the text's UTF-8, in hex.
    std::string Sha(std::string_view text);
    // lens_file.replace('.md', '')
    std::string LensName(std::string_view lensFile);
    // Every lens of the gates.
    std::vector<std::string> ModeLenses();
    // The gates with their lens files. off: the lenses the config turns off;
    // only keeps (test runs), without drops (an owner ruling); an empty span
    // filters nothing, and a gate left empty disappears.
    std::vector<Gate> GatesFor(std::span<const std::string> only = {}, std::span<const std::string> without = {},
                               std::span<const std::string> off = {});

    // The whole job (null when the lens has none) and the block jobs.
    struct LensPlan {
        Json whole;
        std::vector<Json> blocks;
    };
    // unitsFilter: --units (empty: every unit); exclude: the functional
    // lens's path globs.
    LensPlan PlanLens(std::string_view lensFile, const Json& units, std::span<const std::string> lines,
                      std::span<const std::string> unitsFilter = {}, std::span<const std::string> exclude = {});

    // The model is part of the key (a verdict bought from one model is not
    // evidence for another); the effort is not. ident replaces the unit id for
    // a unit that is keyed on its content. nullopt: the job is not reusable.
    std::optional<std::string> ReuseKey(const Json& job, std::string_view lensFile, std::string_view unitText, std::vector<std::string> deps,
                                        std::vector<std::string> inForceIds, std::string_view charterSha, std::int32_t promptVersion,
                                        std::string_view ident = {});

    // A code unit's text without what a rewrite of the range changes while
    // the code stays: the blob ids of an `index` line, the line numbers of a
    // hunk header, and the tail `git format-patch` appends (base-commit, the
    // `-- ` signature, the git version), which the inventory hands to a file's
    // last hunk.
    std::string CodeNorm(std::string_view text);

    // One format-patch file, cut where the inventory cuts it: whether the
    // commit has a body, its code (every file section from the first
    // `diff --git` on, normalised, without documentation files), the base,
    // the diff headers of the documentation files, the message.
    struct PatchParts {
        bool hasBody = false;
        std::string code;
        std::string base;
        std::vector<std::string> docs;
        std::string message;
    };
    PatchParts PartsOf(std::string_view patchText);

    // What the code keys of a range are built from, by commit number K.
    struct CommitCode {
        std::map<std::int64_t, bool> body;
        std::map<std::int64_t, std::string> code;
        std::map<std::int64_t, std::vector<std::string>> docs;
        std::map<std::int64_t, std::string> message;
        std::string range;
        std::map<std::int64_t, std::string> upto;
        std::string base;
    };
    CommitCode CommitCodeOf(const std::map<std::int64_t, std::string>& patches);

    // (ident, deps) of a code unit: a hunk or a file header is keyed on its
    // file and its own normalised text, the two per-commit slots on that
    // commit's position and code, the code of the whole range, its
    // documentation files, and for `absent` whether it has a body. Every code
    // unit depends on the base.
    std::pair<std::string, std::vector<std::string>> CodeKeyParts(std::string_view unitId, const CommitCode& cc);
    std::optional<std::string> CodeReuseKey(const Json& job, std::string_view lensFile, std::string_view unitText, const CommitCode& cc,
                                            std::span<const std::string> inForceIds, std::string_view charterSha, std::int32_t promptVersion,
                                            std::string_view environment = {});
    std::optional<std::string> FunctionalReuseKey(const Json& job, std::string_view lensFile, std::string_view unitText, const CommitCode& cc,
                                                  std::span<const std::string> inForceIds, std::string_view charterSha, std::int32_t promptVersion,
                                                  std::string_view environment = {});
    // By the lens's `key` kind.
    std::optional<std::string> BlockReuseKey(const Json& job, std::string_view lensFile, std::string_view unitText, const CommitCode& cc,
                                             std::span<const std::string> inForceIds, std::string_view charterSha, std::int32_t promptVersion,
                                             std::string_view environment = {});
    // A whole pass that judges the code of the range: the code of every
    // commit in order, the base, which commits have a body and which
    // documentation files each touches. No message text and no commit id.
    std::optional<std::string> WholeCodeKey(const Json& job, std::string_view lensFile, const CommitCode& cc, std::span<const std::string> inForceIds,
                                            std::string_view charterSha, std::int32_t promptVersion, std::string_view environment = {});

    // How many clean reads a stored result stands for: one per round that
    // read its key clean.
    std::int64_t ReadsOf(const Json& entry);
    // Was this key already read clean in that round on that hash?
    bool ReadIn(const Json& entry, std::string_view hash8, std::int64_t round);
    // A stored result under the id its unit has in THIS artifact.
    Json Rebind(const Json& entry, std::string_view unitId);

    // Weighted cost-units (input 1, cache write 1.25, cache read 0.1, output
    // 5) and list USD at opus rates (5 / 6.25 / 0.5 / 25 per M), calibrated on
    // the 2026-09-17 smoke. lensLayerBytes: {lens name: bytes}.
    Json Estimate(std::span<const Json> jobs, std::int64_t prefixBytes, const std::map<std::string, std::int64_t>& lensLayerBytes,
                  std::int64_t tailBytes = 1800, double tpb = 3.7, std::int64_t sysTokens = 32000, std::int64_t outPerTurn = 1200);
}