"""Obsidian review draft writer."""
from __future__ import annotations

import re
from datetime import datetime, timezone
from pathlib import Path

from .config import get_config
from .schemas import MemoryRecord


def _slugify(value: str, fallback: str) -> str:
    slug = re.sub(r"[^a-zA-Z0-9\u4e00-\u9fff_-]+", "-", value.lower()).strip("-")
    slug = re.sub(r"-+", "-", slug)[:80].strip("-")
    return slug or fallback


def write_review_draft(memory: MemoryRecord, reason: str, conflict_ids: list[str] | None = None) -> Path:
    config = get_config()
    review_dir = getattr(config.obsidian, "review_dir", "Reviews/Queue")
    vault_path = Path(config.obsidian.vault_path)
    target_dir = vault_path / review_dir
    target_dir.mkdir(parents=True, exist_ok=True)

    title = memory.summary or memory.content[:80] or memory.id
    filename = f"{_slugify(title, memory.id)}-{memory.id}.md"
    path = target_dir / filename
    conflict_ids = conflict_ids or []

    content = "\n".join(
        [
            "---",
            "type: memory_review",
            f"memory_id: {memory.id}",
            f"user_id: {memory.user_id}",
            f"agent_id: {memory.agent_id or ''}",
            f"workspace_id: {memory.workspace_id or ''}",
            f"namespace: {memory.namespace}",
            f"visibility: {memory.visibility.value}",
            f"importance: {memory.importance}",
            f"confidence: {memory.confidence}",
            f"reason: {reason}",
            f"created_at: {datetime.now(timezone.utc).isoformat()}",
            "tags:",
            "  - memory/review",
            "  - source/evermemos",
            "---",
            "",
            f"# Memory Review - {title}",
            "",
            "## Candidate",
            "",
            memory.content,
            "",
            "## Summary",
            "",
            memory.summary or "",
            "",
            "## Proposed Action",
            "",
            "- [ ] Accept",
            "- [ ] Edit",
            "- [ ] Reject",
            "- [ ] Merge",
            "- [ ] Archive",
            "",
            "## Conflict IDs",
            "",
            "\n".join(f"- {memory_id}" for memory_id in conflict_ids) if conflict_ids else "- none",
            "",
            "## Notes",
            "",
        ]
    )
    path.write_text(content, encoding="utf-8")
    return path