"""Incident ticket export — push Turnstone incidents to external trackers.

Supported targets: "notion", "jira"

Each exporter receives the incident dict and a list of log entry dicts,
and returns {"url": str, "ticket_id": str}.
"""
from __future__ import annotations

import json
from typing import Any

import httpx


# ---------------------------------------------------------------------------
# Notion exporter
# ---------------------------------------------------------------------------

def _notion_export(
    incident: dict[str, Any],
    entries: list[dict[str, Any]],
    token: str,
    database_id: str,
) -> dict[str, str]:
    """Create a Notion page in *database_id* from an incident.

    Notion block types used: heading_2, bulleted_list_item, paragraph.
    Rich text max length is 2000 chars per block.
    """
    if not token or not database_id:
        raise ValueError("Notion not configured — set notion_token and notion_database_id in Settings")

    def _text(s: str, bold: bool = False) -> dict:
        chunk: dict[str, Any] = {"type": "text", "text": {"content": s[:2000]}}
        if bold:
            chunk["annotations"] = {"bold": True}
        return chunk

    log_blocks: list[dict] = []
    for e in entries[:50]:  # Notion has page size limits
        line = f"[{e.get('severity') or '?'}] {e.get('source_id', '')} — {e.get('text', '')[:160]}"
        log_blocks.append({"object": "block", "type": "bulleted_list_item",
                            "bulleted_list_item": {"rich_text": [_text(line)]}})

    sev = incident.get("severity", "medium").upper()
    issue_type = incident.get("issue_type") or "—"
    window = f"{incident.get('started_at') or '?'} → {incident.get('ended_at') or 'ongoing'}"

    children: list[dict] = [
        {"object": "block", "type": "heading_2",
         "heading_2": {"rich_text": [_text("Incident Details", bold=True)]}},
        {"object": "block", "type": "paragraph",
         "paragraph": {"rich_text": [
             _text("Severity: ", bold=True), _text(sev),
             _text("   Type: ", bold=True), _text(issue_type),
             _text("   Window: ", bold=True), _text(window),
         ]}},
    ]
    if incident.get("notes"):
        children.append({"object": "block", "type": "paragraph",
                          "paragraph": {"rich_text": [_text("Notes: ", bold=True), _text(incident["notes"])]}})

    children.append({"object": "block", "type": "heading_2",
                      "heading_2": {"rich_text": [_text("Log Evidence")]}})
    children.extend(log_blocks)

    payload = {
        "parent": {"database_id": database_id},
        "properties": {
            "title": {"title": [_text(incident.get("label", "Unnamed Incident"))]},
        },
        "children": children,
    }

    resp = httpx.post(
        "https://api.notion.com/v1/pages",
        headers={
            "Authorization": f"Bearer {token}",
            "Notion-Version": "2022-06-28",
            "Content-Type": "application/json",
        },
        json=payload,
        timeout=15,
    )
    if not resp.is_success:
        raise RuntimeError(f"Notion API error {resp.status_code}: {resp.text[:300]}")

    page = resp.json()
    page_id = page["id"]
    url = page.get("url") or f"https://notion.so/{page_id.replace('-', '')}"
    return {"url": url, "ticket_id": page_id}


# ---------------------------------------------------------------------------
# Jira exporter
# ---------------------------------------------------------------------------

def _jira_export(
    incident: dict[str, Any],
    entries: list[dict[str, Any]],
    jira_url: str,
    email: str,
    api_token: str,
    project_key: str,
    issue_type: str = "Bug",
) -> dict[str, str]:
    """Create a Jira issue via REST API v3 (cloud or Server 8.4+)."""
    if not jira_url or not email or not api_token or not project_key:
        raise ValueError("Jira not configured — set jira_url, jira_email, jira_api_token, and jira_project_key in Settings")

    base = jira_url.rstrip("/")
    sev = incident.get("severity", "medium").upper()
    inc_type = incident.get("issue_type") or "incident"
    window = f"{incident.get('started_at') or '?'} → {incident.get('ended_at') or 'ongoing'}"

    log_lines = "\n".join(
        f"[{e.get('severity') or '?'}] {e.get('source_id', '')} — {e.get('text', '')[:160]}"
        for e in entries[:40]
    )
    description = (
        f"*Severity:* {sev}  |  *Type:* {inc_type}  |  *Window:* {window}\n\n"
        + (f"*Notes:* {incident['notes']}\n\n" if incident.get("notes") else "")
        + "h2. Log Evidence\n\n{{code}}\n" + log_lines + "\n{{code}}"
    )

    # Jira REST v3 uses Atlassian Document Format for description
    adf_body = {
        "type": "doc",
        "version": 1,
        "content": [
            {"type": "paragraph", "content": [{"type": "text", "text": description}]},
        ],
    }

    payload = {
        "fields": {
            "project": {"key": project_key},
            "summary": incident.get("label", "Unnamed Incident"),
            "issuetype": {"name": issue_type},
            "description": adf_body,
        }
    }

    import base64 as _b64
    creds = _b64.b64encode(f"{email}:{api_token}".encode()).decode()
    resp = httpx.post(
        f"{base}/rest/api/3/issue",
        headers={
            "Authorization": f"Basic {creds}",
            "Content-Type": "application/json",
            "Accept": "application/json",
        },
        json=payload,
        timeout=15,
    )
    if not resp.is_success:
        raise RuntimeError(f"Jira API error {resp.status_code}: {resp.text[:300]}")

    data = resp.json()
    issue_key = data["key"]
    url = f"{base}/browse/{issue_key}"
    return {"url": url, "ticket_id": issue_key}


# ---------------------------------------------------------------------------
# Public API
# ---------------------------------------------------------------------------

_EXPORTERS = {
    "notion": _notion_export,
    "jira": _jira_export,
}


def available_targets() -> list[str]:
    return list(_EXPORTERS.keys())


def export_incident(
    target: str,
    incident: dict[str, Any],
    entries: list[dict[str, Any]],
    config: dict[str, str],
) -> dict[str, str]:
    """Dispatch to the appropriate exporter.

    *config* is pulled from the settings pref dict — callers pass the relevant
    subset so this service stays stateless and testable.

    Returns {"url": str, "ticket_id": str}.
    Raises ValueError for unknown target or missing config.
    Raises RuntimeError on API-level failures.
    """
    if target not in _EXPORTERS:
        raise ValueError(f"Unknown ticket target: {target!r}. Supported: {list(_EXPORTERS)}")

    if target == "notion":
        return _notion_export(
            incident, entries,
            token=config.get("notion_token", ""),
            database_id=config.get("notion_database_id", ""),
        )
    if target == "jira":
        return _jira_export(
            incident, entries,
            jira_url=config.get("jira_url", ""),
            email=config.get("jira_email", ""),
            api_token=config.get("jira_api_token", ""),
            project_key=config.get("jira_project_key", ""),
            issue_type=config.get("jira_issue_type", "Bug"),
        )
    raise ValueError(f"Unhandled target: {target!r}")