import asyncio
import os
import sys
from pathlib import Path

from dotenv import load_dotenv
for p in [".env", "python/.env", "../.env", "../python/.env"]:
    if os.path.exists(p):
        load_dotenv(p)

# Add src and python to path
python_dir = Path(__file__).parent.parent / "python"
sys.path.append(str(python_dir))
sys.path.append(str(python_dir / "src"))

from server.config.logfire_config import get_logger
from server.services.librarian_service import LibrarianService

logger = get_logger("seed_knowledge")

# Dynamic Path Detection for Host vs Docker
# Pattern 14: Cross-Env Path Resilience
POSSIBLE_DIRS = [
    "../enduser-ui-fe/public/aus/156_resource",      # Host relative
    "/app/frontend_public/aus/156_resource",        # Docker internal mapping
    "enduser-ui-fe/public/aus/156_resource",         # Root relative
    "../enduser-ui-fe/public/assets/videos/auto_demos",
    "/app/frontend_public/assets/videos/auto_demos",
    "enduser-ui-fe/public/assets/videos/auto_demos",
    "../docs/docs/knowledge-journal",               # Host relative journal
    "/app/docs/docs/knowledge-journal",             # Docker internal journal
    "docs/docs/knowledge-journal"                   # Root relative journal
]

SYSTEM_DOCS = [
    "../CONTRIBUTING_tw.md",
    "/app/CONTRIBUTING_tw.md",
    "CONTRIBUTING_tw.md"
]

TARGET_DIRS = []
seen_resolved = set()
for p in POSSIBLE_DIRS:
    resolved_path = Path(p).resolve()
    if resolved_path.exists() and resolved_path not in seen_resolved:
        TARGET_DIRS.append(p)
        seen_resolved.add(resolved_path)

TARGET_FILES = []
for p in SYSTEM_DOCS:
    if Path(p).resolve().is_file():
        TARGET_FILES.append(p)
        break

async def seed_knowledge():
    if not TARGET_DIRS and not TARGET_FILES:
        print("❌ Error: No valid knowledge source directory or file found.")
        return

    librarian = LibrarianService()

    print("🤖 Librarian Robot: Initialized.")
    print(f"📂 Scanning directories: {TARGET_DIRS}")
    print(f"📄 Scanning system files: {TARGET_FILES}")

    total_files = 0
    success_files = 0

    all_file_paths = []
    
    # Combine directory files
    for dir_path in TARGET_DIRS:
        abs_path = Path(dir_path).resolve()
        if abs_path.exists():
            for root, _, files in os.walk(abs_path):
                for file in files:
                    all_file_paths.append(Path(root) / file)
                    
    # Combine individual system documents
    for file_p in TARGET_FILES:
        fp = Path(file_p).resolve()
        if fp.exists():
            all_file_paths.append(fp)

    for file_path in all_file_paths:
        file = file_path.name

        # Filter useful files
        if file.startswith('.') or file == "DS_Store":
            continue

        try:
            # Skip companion text files to avoid duplicate entries
            if file.endswith('.txt'):
                base_name = file_path.stem
                parent_dir = file_path.parent
                has_video = (parent_dir / f"{base_name}.mp4").exists() or (parent_dir / f"{base_name}.webm").exists()
                if has_video:
                    print(f"📄 Skipping companion text file (handled via video): {file}")
                    continue

            total_files += 1
            content = ""
            k_type = "technical"

            if file.endswith('.md') or file.endswith('.mdx') or file.endswith('.txt'):
                with open(file_path, encoding='utf-8') as f:
                    content = f.read()
            elif file.endswith('.mp4') or file.endswith('.webm'):
                txt_companion = file_path.with_suffix('.txt')
                if txt_companion.exists():
                    with open(txt_companion, encoding='utf-8') as f:
                        content = f.read()
                    print(f"🎬 Found companion text for video {file}: {len(content)} chars.")
                else:
                    content = f"行銷影片素材: {file}，主要用於系統人機協同展示。"
                k_type = "marketing"
            elif file.endswith('.pdf'):
                import pdfplumber
                with pdfplumber.open(file_path) as pdf:
                    content = ""
                    for page in pdf.pages:
                        content += (page.extract_text() or "") + "\n"
            else:
                total_files -= 1  # Not counting unsupported types
                print(f"⚠️  Skipping unsupported file type: {file}")
                continue

            if not content.strip():
                print(f"⚠️  Skipping empty file: {file}")
                continue

            print(f"📄 Archiving: {file} ({len(content)} chars, type: {k_type})...")

            # Call Librarian
            source_id = await librarian.archive_file(
                file_name=file,
                content=content,
                file_path=str(file_path),
                knowledge_type=k_type
            )

            if source_id:
                print(f"   ✅ Done! ID: {source_id}")
                success_files += 1
            else:
                print(f"   ❌ Failed to archive {file}")

        except Exception as e:
            print(f"   ❌ Error processing {file}: {e}")

    print(f"\n🎉 Seeding Complete. Processed {success_files}/{total_files} files.")

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