#!/usr/bin/env python3
"""Generate embeddings for decision blocks and case law.

Creates:
- paragraph_embeddings: for each decision block with content
- case_law_embeddings: for each case law summary
"""

import asyncio
import sys
from pathlib import Path
from uuid import UUID

sys.path.insert(0, str(Path(__file__).parent.parent / "mcp-server" / "src"))

from legal_mcp.services.db import get_pool, init_schema, close_pool
from legal_mcp.services.embeddings import embed_texts
from legal_mcp import config


async def generate_block_embeddings(conn) -> int:
    """Generate embeddings for decision blocks.

    First creates decision_paragraphs records from block content,
    then generates embeddings in paragraph_embeddings.
    """
    blocks = await conn.fetch(
        """SELECT db.id as block_id, db.decision_id, db.block_id as block_type,
                  db.content, db.word_count, c.case_number
           FROM decision_blocks db
           JOIN decisions d ON d.id = db.decision_id
           JOIN cases c ON c.id = d.case_id
           WHERE db.word_count > 10
           AND db.block_id NOT IN ('block-alef', 'block-bet', 'block-gimel', 'block-dalet')
           ORDER BY c.case_number, db.block_index"""
    )

    if not blocks:
        print("  אין בלוקים ליצירת embeddings")
        return 0

    print(f"  מעבד {len(blocks)} בלוקים...")

    # Create paragraphs and collect texts for embedding
    para_records = []
    para_number = 1

    for block in blocks:
        content = block["content"]
        words = content.split()

        # Split into chunks for embedding
        if len(words) <= 600:
            chunk_texts = [content]
        else:
            chunk_texts = []
            for start in range(0, len(words), 400):
                chunk_words = words[start:start + 500]
                if len(chunk_words) > 50:
                    chunk_texts.append(" ".join(chunk_words))

        for chunk_text in chunk_texts:
            # Create decision_paragraph record
            para_id = await conn.fetchval(
                """INSERT INTO decision_paragraphs
                   (block_id, paragraph_number, content, word_count)
                   VALUES ($1, $2, $3, $4)
                   ON CONFLICT DO NOTHING
                   RETURNING id""",
                block["block_id"],
                para_number,
                chunk_text,
                len(chunk_text.split()),
            )
            if para_id:
                para_records.append({
                    "para_id": para_id,
                    "text": chunk_text,
                    "case_number": block["case_number"],
                })
                para_number += 1

    if not para_records:
        print("  אין פסקאות חדשות")
        return 0

    print(f"  {len(para_records)} פסקאות נוצרו, מייצר embeddings...")

    # Generate embeddings in batches
    texts = [p["text"] for p in para_records]
    embeddings = await embed_texts(texts, input_type="document")

    # Store embeddings
    count = 0
    for para, embedding in zip(para_records, embeddings):
        await conn.execute(
            """INSERT INTO paragraph_embeddings (paragraph_id, embedding)
               VALUES ($1, $2)""",
            para["para_id"],
            embedding,
        )
        count += 1

    return count


async def generate_case_law_embeddings(conn) -> int:
    """Generate embeddings for case law summaries."""
    cases = await conn.fetch(
        """SELECT id, case_number, case_name, summary, key_quote
           FROM case_law
           WHERE summary != '' OR key_quote != ''"""
    )

    # Filter out existing
    existing = await conn.fetch("SELECT case_law_id FROM case_law_embeddings")
    existing_ids = {r["case_law_id"] for r in existing}

    to_embed = [c for c in cases if c["id"] not in existing_ids]

    if not to_embed:
        print("  אין פסיקה חדשה ליצירת embeddings")
        return 0

    print(f"  מייצר embeddings ל-{len(to_embed)} תקדימים...")

    texts = []
    for c in to_embed:
        # Combine case info into a searchable text
        text = f"{c['case_number']} {c['case_name']}: {c['summary']}"
        if c["key_quote"]:
            text += f" ציטוט: {c['key_quote']}"
        texts.append(text)

    embeddings = await embed_texts(texts, input_type="document")

    count = 0
    for case, embedding in zip(to_embed, embeddings):
        await conn.execute(
            """INSERT INTO case_law_embeddings (case_law_id, chunk_text, embedding)
               VALUES ($1, $2, $3)""",
            case["id"],
            f"{case['case_number']} {case['case_name']}: {case['summary']}",
            embedding,
        )
        count += 1

    return count


async def main():
    await init_schema()
    pool = await get_pool()

    async with pool.acquire() as conn:
        print("שלב 1: embeddings לבלוקי החלטה")
        block_count = await generate_block_embeddings(conn)
        print(f"  ✅ {block_count} embeddings נוצרו")

        print("\nשלב 2: embeddings לפסיקה")
        cl_count = await generate_case_law_embeddings(conn)
        print(f"  ✅ {cl_count} embeddings נוצרו")

        # Summary
        para_total = await conn.fetchval("SELECT count(*) FROM paragraph_embeddings")
        cl_total = await conn.fetchval("SELECT count(*) FROM case_law_embeddings")

    await close_pool()

    print(f"\nסיכום:")
    print(f"  סה\"כ paragraph_embeddings: {para_total}")
    print(f"  סה\"כ case_law_embeddings: {cl_total}")
    print(f"  מודל: {config.VOYAGE_MODEL}")


if __name__ == "__main__":
    asyncio.run(main())