"""API routes for searching and fetching souls-directory markdown entries."""

from __future__ import annotations

import re

from fastapi import APIRouter, Depends, HTTPException, Query, status

from app.api.deps import ActorContext, require_user_or_agent
from app.schemas.souls_directory import (
    SoulsDirectoryMarkdownResponse,
    SoulsDirectorySearchResponse,
    SoulsDirectorySoulRef,
)
from app.services import souls_directory

router = APIRouter(prefix="/souls-directory", tags=["souls-directory"])
USER_OR_AGENT_DEP = Depends(require_user_or_agent)

_SAFE_SEGMENT_RE = re.compile(r"^[a-zA-Z0-9][a-zA-Z0-9_-]*$")
_SAFE_SLUG_RE = re.compile(r"^[a-zA-Z0-9][a-zA-Z0-9_-]*$")


def _validate_segment(value: str, *, field: str) -> str:
    cleaned = value.strip().strip("/")
    if not cleaned:
        raise HTTPException(
            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
            detail=f"{field} is required",
        )
    if field == "handle":
        ok = bool(_SAFE_SEGMENT_RE.match(cleaned))
    else:
        ok = bool(_SAFE_SLUG_RE.match(cleaned))
    if not ok:
        raise HTTPException(
            status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
            detail=f"{field} contains unsupported characters",
        )
    return cleaned


@router.get("/search", response_model=SoulsDirectorySearchResponse)
async def search(
    q: str = Query(default="", min_length=0),
    limit: int = Query(default=20, ge=1, le=100),
    _actor: ActorContext = USER_OR_AGENT_DEP,
) -> SoulsDirectorySearchResponse:
    """Search souls-directory entries by handle/slug query text."""
    refs = await souls_directory.list_souls_directory_refs()
    matches = souls_directory.search_souls(refs, query=q, limit=limit)
    items = [
        SoulsDirectorySoulRef(
            handle=ref.handle,
            slug=ref.slug,
            page_url=ref.page_url,
            raw_md_url=ref.raw_md_url,
        )
        for ref in matches
    ]
    return SoulsDirectorySearchResponse(items=items)


@router.get("/{handle}/{slug}.md", response_model=SoulsDirectoryMarkdownResponse)
@router.get("/{handle}/{slug}", response_model=SoulsDirectoryMarkdownResponse)
async def get_markdown(
    handle: str,
    slug: str,
    _actor: ActorContext = USER_OR_AGENT_DEP,
) -> SoulsDirectoryMarkdownResponse:
    """Fetch markdown content for a validated souls-directory handle and slug."""
    safe_handle = _validate_segment(handle, field="handle")
    safe_slug = _validate_segment(slug.removesuffix(".md"), field="slug")
    try:
        content = await souls_directory.fetch_soul_markdown(
            handle=safe_handle,
            slug=safe_slug,
        )
    except Exception as exc:
        raise HTTPException(
            status_code=status.HTTP_502_BAD_GATEWAY,
            detail=str(exc),
        ) from exc
    return SoulsDirectoryMarkdownResponse(
        handle=safe_handle,
        slug=safe_slug,
        content=content,
    )