"""
Aether Platform knowledge tools — journal search, listing, and entry management.

These tools give the orchestrator read/write access to the AE Journals module,
which serves as the primary long-term knowledge base.

Auth: x-aether-api-key + x-account-id headers (same pattern as agents_sync scripts).
API:  V3 CRUD — POST /v3/crud/journal_entry/search, POST /v3/crud/journal/{id}/journal_entry/
              PATCH /v3/crud/journal_entry/{entry_id}, GET /v3/crud/journal_entry/{entry_id}
"""

import asyncio
import logging
from config import settings

logger = logging.getLogger(__name__)

# ---------------------------------------------------------------------------
# Shared helpers
# ---------------------------------------------------------------------------

def _headers() -> dict:
    return {
        "x-aether-api-key": settings.ae_api_key,
        "x-account-id": settings.ae_account_id,
        "Content-Type": "application/json",
    }


def _check_config() -> str | None:
    """Return an error string if AE API is not configured, else None."""
    if not settings.ae_api_key or not settings.ae_account_id:
        return (
            "AE API not configured. Set AE_API_KEY and AE_ACCOUNT_ID in .env. "
            "Values are the same as agents_sync/mcp/.env."
        )
    return None


# ---------------------------------------------------------------------------
# Tool: ae_journal_search
# ---------------------------------------------------------------------------

async def journal_search(query: str, journal_id: str | None = None, max_results: int = 10) -> str:
    """Search AE Journal entries by keyword.

    Searches across the default_qry_str field (title + content excerpt).
    Optionally scoped to a specific journal by journal_id (id_random).
    Returns a markdown-formatted list of matching entries.
    """
    err = _check_config()
    if err:
        return err

    return await asyncio.to_thread(_sync_journal_search, query, journal_id, max_results)


def _sync_journal_search(query: str, journal_id: str | None, max_results: int) -> str:
    import requests

    url = f"{settings.ae_api_url}/v3/crud/journal_entry/search"
    search_body = {
        "and_filters": [
            {"field": "default_qry_str", "op": "icontains", "value": query}
        ],
        "page_size": max_results,
    }

    params = {}
    if journal_id:
        params["for_obj_type"] = "journal"
        params["for_obj_id"] = journal_id

    try:
        resp = requests.post(
            url,
            headers=_headers(),
            params=params,
            json=search_body,
            timeout=settings.ae_api_timeout,
        )
        resp.raise_for_status()
        data = resp.json()
    except Exception as e:
        logger.warning("ae_journal_search failed: %s", e)
        return f"Journal search error: {e}"

    entries = data.get("data", [])
    if not entries:
        return f"No journal entries found matching: {query}"

    lines = [f"Journal entries matching **{query}** ({len(entries)} result(s)):\n"]
    for entry in entries:
        title = entry.get("name") or "(untitled)"
        entry_id = entry.get("id_random", "")
        journal_name = entry.get("journal_name") or entry.get("parent_name") or ""
        summary = entry.get("summary") or ""
        content_preview = (entry.get("content") or "")[:200].replace("\n", " ")

        header = f"**{title}**"
        if journal_name:
            header += f" ({journal_name})"
        if entry_id:
            header += f" — id: `{entry_id}`"

        lines.append(header)
        if summary:
            lines.append(f"  Summary: {summary}")
        if content_preview:
            lines.append(f"  {content_preview}…")
        lines.append("")

    return "\n".join(lines).strip()


# ---------------------------------------------------------------------------
# Tool: ae_journal_list
# ---------------------------------------------------------------------------

async def journal_list() -> str:
    """List all journals accessible to the configured AE account."""
    err = _check_config()
    if err:
        return err
    return await asyncio.to_thread(_sync_journal_list)


def _sync_journal_list() -> str:
    import requests

    url = f"{settings.ae_api_url}/v3/crud/journal/search"
    try:
        resp = requests.post(
            url,
            headers=_headers(),
            json={"page_size": 100},
            timeout=settings.ae_api_timeout,
        )
        resp.raise_for_status()
        data = resp.json()
    except Exception as e:
        logger.warning("ae_journal_list failed: %s", e)
        return f"Journal list error: {e}"

    journals = data.get("data", [])
    if not journals:
        return "No journals found for this account."

    lines = [f"Journals ({len(journals)}):\n"]
    for j in journals:
        jid  = j.get("journal_id") or j.get("id_random") or j.get("id") or "?"
        name = j.get("name") or "(untitled)"
        desc = j.get("description") or ""
        line = f"- **{name}** — id: `{jid}`"
        if desc:
            line += f"\n  {desc}"
        lines.append(line)

    return "\n".join(lines)


# ---------------------------------------------------------------------------
# Tool: ae_journal_entry_create
# ---------------------------------------------------------------------------

async def journal_entry_create(
    journal_id: str,
    title: str,
    content: str,
    summary: str = "",
    tags: str = "",
) -> str:
    """Create a new entry in an AE Journal.

    Args:
        journal_id: The id_random of the target journal (use ae_journal_search to find it,
                    or ask the user which journal to write to).
        title:      Entry title (name field).
        content:    Full entry content (markdown supported).
        summary:    Optional short summary (1-2 sentences).
        tags:       Optional comma-separated tags.

    Returns a confirmation with the new entry's id_random, or an error message.
    """
    err = _check_config()
    if err:
        return err

    return await asyncio.to_thread(
        _sync_journal_entry_create, journal_id, title, content, summary, tags
    )


def _sync_journal_entry_create(
    journal_id: str, title: str, content: str, summary: str, tags: str
) -> str:
    import requests

    url = f"{settings.ae_api_url}/v3/crud/journal/{journal_id}/journal_entry/"
    data: dict = {"name": title, "content": content}
    if summary:
        data["summary"] = summary
    if tags:
        data["tags"] = [t.strip() for t in tags.split(",") if t.strip()]

    try:
        resp = requests.post(
            url,
            headers=_headers(),
            json=data,
            timeout=settings.ae_api_timeout,
        )
        resp.raise_for_status()
        result = resp.json()
    except Exception as e:
        logger.warning("ae_journal_entry_create failed: %s", e)
        return f"Journal entry creation error: {e}"

    entry_id = (
        result.get("data", {}).get("journal_entry_id")
        or result.get("data", {}).get("id_random")
        or result.get("id_random")
        or "unknown"
    )
    return f"Journal entry created. id: `{entry_id}`, title: \"{title}\", journal: `{journal_id}`"


# ---------------------------------------------------------------------------
# Shared helper: fetch a single journal entry by id
# ---------------------------------------------------------------------------

def _get_entry(entry_id: str) -> dict | str:
    """Return the entry dict, or an error string on failure."""
    import requests
    url = f"{settings.ae_api_url}/v3/crud/journal_entry/{entry_id}"
    try:
        resp = requests.get(url, headers=_headers(), timeout=settings.ae_api_timeout)
        resp.raise_for_status()
        data = resp.json()
        entry = data.get("data") or data
        if not isinstance(entry, dict):
            return f"Unexpected response shape for entry {entry_id}"
        return entry
    except Exception as e:
        logger.warning("_get_entry %s failed: %s", entry_id, e)
        return f"Error fetching entry {entry_id}: {e}"


def _patch_entry(entry_id: str, payload: dict) -> str:
    """PATCH a journal entry. Returns a success/error string."""
    import requests
    url = f"{settings.ae_api_url}/v3/crud/journal_entry/{entry_id}"
    try:
        resp = requests.patch(
            url,
            headers=_headers(),
            json=payload,
            timeout=settings.ae_api_timeout,
        )
        resp.raise_for_status()
        return "ok"
    except Exception as e:
        logger.warning("_patch_entry %s failed: %s", entry_id, e)
        return f"Error updating entry {entry_id}: {e}"


# ---------------------------------------------------------------------------
# Tool: ae_journal_entry_update
# ---------------------------------------------------------------------------

async def journal_entry_update(
    entry_id: str,
    title: str = "",
    content: str = "",
    summary: str = "",
    tags: str = "",
    enable: bool | None = None,
) -> str:
    """Update fields on an existing journal entry. Only provided fields are changed."""
    err = _check_config()
    if err:
        return err
    return await asyncio.to_thread(_sync_journal_entry_update, entry_id, title, content, summary, tags, enable)


def _sync_journal_entry_update(
    entry_id: str,
    title: str,
    content: str,
    summary: str,
    tags: str,
    enable: bool | None,
) -> str:
    payload: dict = {}
    if title:
        payload["name"] = title
    if content:
        payload["content"] = content
    if summary:
        payload["summary"] = summary
    if tags:
        payload["tags"] = [t.strip() for t in tags.split(",") if t.strip()]
    if enable is not None:
        payload["enable"] = enable

    if not payload:
        return "Nothing to update — no fields provided."

    result = _patch_entry(entry_id, payload)
    if result != "ok":
        return result

    updated = ", ".join(payload.keys())
    return f"Journal entry `{entry_id}` updated. Fields changed: {updated}"


# ---------------------------------------------------------------------------
# Tool: ae_journal_entry_disable
# ---------------------------------------------------------------------------

async def journal_entry_disable(entry_id: str) -> str:
    """Soft-delete a journal entry by setting enable=false."""
    err = _check_config()
    if err:
        return err
    return await asyncio.to_thread(_patch_entry, entry_id, {"enable": False})


# ---------------------------------------------------------------------------
# Tool: ae_journal_entry_append
# ---------------------------------------------------------------------------

async def journal_entry_append(entry_id: str, content: str, heading: str = "") -> str:
    """Append a timestamped section to the bottom of a journal entry's content."""
    err = _check_config()
    if err:
        return err
    return await asyncio.to_thread(_sync_journal_entry_append, entry_id, content, heading)


def _sync_journal_entry_append(entry_id: str, content: str, heading: str) -> str:
    from datetime import datetime, timezone

    entry = _get_entry(entry_id)
    if isinstance(entry, str):
        return entry

    existing = (entry.get("content") or "").rstrip()
    ts = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M UTC")
    section_heading = heading or ts
    new_content = f"{existing}\n\n### {section_heading}\n{content.strip()}"

    result = _patch_entry(entry_id, {"content": new_content})
    if result != "ok":
        return result
    return f"Appended to journal entry `{entry_id}` under heading \"{section_heading}\"."


# ---------------------------------------------------------------------------
# Tool: ae_journal_entry_prepend
# ---------------------------------------------------------------------------

async def journal_entry_prepend(entry_id: str, content: str, heading: str = "") -> str:
    """Prepend a timestamped section to the top of a journal entry's content."""
    err = _check_config()
    if err:
        return err
    return await asyncio.to_thread(_sync_journal_entry_prepend, entry_id, content, heading)


def _sync_journal_entry_prepend(entry_id: str, content: str, heading: str) -> str:
    from datetime import datetime, timezone

    entry = _get_entry(entry_id)
    if isinstance(entry, str):
        return entry

    existing = (entry.get("content") or "").lstrip()
    ts = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M UTC")
    section_heading = heading or ts
    new_content = f"### {section_heading}\n{content.strip()}\n\n{existing}"

    result = _patch_entry(entry_id, {"content": new_content})
    if result != "ok":
        return result
    return f"Prepended to journal entry `{entry_id}` under heading \"{section_heading}\"."