"""Scribe-plugin support endpoints.

Consumed by the Scribe Claude Code plugin (not the web UI). `GET /api/plugin/
context` is curled by the plugin's SessionStart hook to push the operator's
always-on rules + active-project context into the session — Scribe's own push
channel. Auth is the standard `@login_required` path, which accepts a `Bearer
fmcp_<key>` API key (a read-scoped key suffices for this GET).
"""
from __future__ import annotations

from quart import Blueprint, g, jsonify, request

from scribe.auth import admin_required, get_current_user_id, login_required
from scribe.config import Config
from scribe.services import plugin_context as plugin_ctx_svc
from scribe.services import repo_bindings as repo_bindings_svc
from scribe.services.settings import get_admin_setting, set_setting

plugin_bp = Blueprint("plugin", __name__, url_prefix="/api/plugin")

# Setting key for the git URL of the marketplace that serves this plugin (the
# Scribe app's own repo). Instance-global (stored on an admin account) so every
# user's Settings page shows the real, copyable install command.
_MARKETPLACE_KEY = "plugin_marketplace_url"


def _int_list(raw: str | None) -> list[int]:
    """A comma-separated id list from the query string; non-ints dropped."""
    return [int(p) for p in (raw or "").split(",") if p.strip().isdigit()]


async def _project_scope() -> tuple[int, str, str]:
    """(project_id, repo, unbound_repo) from the request's `project_id` /
    `repo` query args — the one resolution every plugin endpoint shares.

    An explicit project_id wins; otherwise the repo remote is resolved
    through the caller's bindings, and a remote nobody bound comes back as
    `unbound_repo` (normalised) so /context can say "bind this repo".
    """
    try:
        project_id = int(request.args.get("project_id", 0) or 0)
    except (TypeError, ValueError):
        project_id = 0
    repo = (request.args.get("repo") or "").strip()
    unbound_repo = ""
    if repo and not project_id:
        resolved = await repo_bindings_svc.resolve_project(g.user.id, repo)
        if resolved:
            project_id = resolved
        else:
            unbound_repo = repo_bindings_svc.normalize_repo_key(repo)
    return project_id, repo, unbound_repo



@plugin_bp.get("/context")
@login_required
async def session_context():
    """Return SessionStart context (always-on rules + active project).

    Query:
        repo (optional str) — the working repo's git remote. The server
            resolves it to the bound project (see services/repo_bindings); an
            unbound repo yields a "bind this repo" hint instead. This is how the
            active project is determined — the plugin never pins a project id.
        project_id (optional int) — explicit override, mainly for manual/ad-hoc
            curl testing; takes precedence over `repo` when set.
    """
    project_id, _repo, unbound_repo = await _project_scope()
    result = await plugin_ctx_svc.build_session_context(
        g.user.id, project_id, unbound_repo=unbound_repo
    )
    return jsonify(result)


@plugin_bp.get("/retrieve")
@login_required
async def autoinject_retrieve():
    """Title-first knowledge auto-inject for the plugin's UserPromptSubmit hook.

    Given the user's prompt (`q`), returns a compact awareness hint — note
    titles + scores only, never bodies — for the top hits that clear the
    per-user gates (see services.plugin_context.build_autoinject_hint). Returns
    empty context (most of the time) when disabled or nothing is relevant.

    Query:
        q (str)            — the user's prompt to retrieve against.
        repo (optional)    — working repo remote; resolved to the bound project
                             to scope the search (mirrors /context). Unbound or
                             absent → searches all the user's notes.
        project_id (opt)   — explicit project scope override (ad-hoc/testing).
        exclude_ids (opt)  — comma-separated note ids already injected this
                             session; skipped so each note injects at most once.
    """
    q = (request.args.get("q") or "").strip()
    project_id, _repo, _unbound = await _project_scope()
    exclude_ids = _int_list(request.args.get("exclude_ids"))
    result = await plugin_ctx_svc.build_autoinject_hint(
        g.user.id, q, project_id=project_id, exclude_ids=exclude_ids
    )
    return jsonify(result)


@plugin_bp.get("/prior-art")
@login_required
async def write_path_prior_art():
    """Prior-art hint for the plugin's PreToolUse hook on Write/Edit.

    Answers "what is already recorded for the file about to be written?" — by
    place (a snippet at this path or in its directory) and by meaning (snippets
    resembling the code about to be written). Titles only, gated, and empty most
    of the time. See services.plugin_context.build_write_path_hint.

    Query:
        path (str)         — the target file, REPO-RELATIVE, matching the
                             convention snippet locations are recorded in. An
                             absolute path simply won't match anything.
        code (optional)    — the code about to be written; the semantic query.
                             Omit it and only the location arm runs.
        repo (optional)    — working repo remote; resolved to the bound project
                             to scope the search, exactly as /retrieve does. It
                             is NOT used as the location `repo` filter — see the
                             service docstring for why those two differ.
        project_id (opt)   — explicit project scope override (ad-hoc/testing).
        exclude_ids (opt)  — comma-separated REUSE-class ids already surfaced
                             this session.
        exclude_sync_ids (opt) — comma-separated SYNC-class ids (snippets
                             recorded AT the edited file, #2708) already
                             surfaced. A separate channel on purpose: a reuse
                             hint shown early must not suppress the record-sync
                             nudge when the recorded file is edited later.
        exclude_derive (opt) — comma-separated derive keys (a derive group id
                             or `canon:<snippet_id>`) already named this
                             session by the ledger arm (#2900); its own
                             channel, like the two above.
        shapes (opt)       — comma-separated `kind:name` definitions the hook
                             found in (or enclosing) the payload, kind being
                             css|sym. The shape ledger's write-path feed
                             (#2791): when the session recently PULLED a
                             snippet this payload references or resembles,
                             these land as instance rows (classified_by=hook).
                             Honoured only for a caller allowed to write — a
                             read-scoped key still gets the hint, and never
                             changes accounting on a GET.
    """
    path = (request.args.get("path") or "").strip()
    code = request.args.get("code") or ""
    project_id, repo, _unbound = await _project_scope()
    exclude_ids = _int_list(request.args.get("exclude_ids"))
    exclude_sync_ids = _int_list(request.args.get("exclude_sync_ids"))
    exclude_derive = [
        p.strip() for p in (request.args.get("exclude_derive") or "").split(",") if p.strip()
    ]
    shapes = _parse_shapes(request.args.get("shapes") or "")
    api_key = getattr(g, "api_key", None)
    may_stamp = api_key is None or getattr(api_key, "scope", "") == "write"

    result = await plugin_ctx_svc.build_write_path_hint(
        g.user.id, path, code=code, project_id=project_id,
        exclude_ids=exclude_ids, exclude_sync_ids=exclude_sync_ids,
        stamp_shapes=shapes if may_stamp else None,
        repo_key=repo_bindings_svc.normalize_repo_key(repo) if repo else "",
        exclude_derive=exclude_derive,
    )
    return jsonify(result)


# The hook names at most a dozen definitions per write; anything past that is
# a generated file, not a shape being instantiated.
_SHAPES_CAP = 12


def _parse_shapes(raw: str) -> list[tuple[str, str]]:
    """`css:btn-primary,sym:onTrash` → [("css", "btn-primary"), ("sym", "onTrash")].
    Unknown kinds and empty names are dropped, duplicates collapse, and the
    list is capped — the hook's own cap, re-applied so the contract holds
    for any caller."""
    out: list[tuple[str, str]] = []
    for part in raw.split(","):
        kind, _sep, name = part.strip().partition(":")
        kind, name = kind.strip(), name.strip()
        if kind in ("css", "sym") and name and (kind, name) not in out:
            out.append((kind, name))
        if len(out) >= _SHAPES_CAP:
            break
    return out


@plugin_bp.get("/processes")
@login_required
async def process_manifest():
    """Stored Processes as skill-stub specs for the plugin's sync script.

    The plugin's `scribe_sync_processes.sh` (run at SessionStart and via the
    `/scribe:sync` command) curls this and writes one auto-surfacing local skill
    per Process into ~/.claude/skills/. See services/plugin_context.
    build_process_manifest. A read-scoped API key suffices.
    """
    result = await plugin_ctx_svc.build_process_manifest(g.user.id)
    return jsonify(result)


@plugin_bp.get("/marketplace-url")
@login_required
async def get_marketplace_url():
    """The plugin marketplace git URL, readable by any logged-in user so their
    Settings page can show a copyable install command. Falls back to the
    config default (this deployment's own repo) when no admin override is set."""
    url = await get_admin_setting(_MARKETPLACE_KEY, default=Config.PLUGIN_MARKETPLACE_URL)
    return jsonify({"marketplace_url": url})


@plugin_bp.put("/marketplace-url")
@admin_required
async def set_marketplace_url():
    """Admin-set the marketplace git URL (e.g. this app's own repo)."""
    data = await request.get_json() or {}
    url = (data.get("marketplace_url") or "").strip()
    if url:
        scheme = url.split("://")[0].lower() if "://" in url else ""
        if scheme not in ("http", "https"):
            return jsonify({"error": "Marketplace URL must use http or https"}), 400
    await set_setting(get_current_user_id(), _MARKETPLACE_KEY, url)
    return jsonify({"status": "ok"})
