import importlib.metadata
import json
import logging
import os
import pkgutil
import sys
import shutil
from pathlib import Path

import markdown
from bs4 import BeautifulSoup
from open_webui.constants import ERROR_MESSAGES

####################################
# Load .env file
####################################

OPEN_WEBUI_DIR = Path(__file__).parent  # the path containing this file
print(OPEN_WEBUI_DIR)

BACKEND_DIR = OPEN_WEBUI_DIR.parent  # the path containing this file
BASE_DIR = BACKEND_DIR.parent  # the path containing the backend/

print(BACKEND_DIR)
print(BASE_DIR)

try:
    from dotenv import find_dotenv, load_dotenv

    load_dotenv(find_dotenv(str(BASE_DIR / ".env")))
except ImportError:
    print("dotenv not installed, skipping...")

DOCKER = os.environ.get("DOCKER", "False").lower() == "true"

# device type embedding models - "cpu" (default), "cuda" (nvidia gpu required) or "mps" (apple silicon) - choosing this right can lead to better performance
USE_CUDA = os.environ.get("USE_CUDA_DOCKER", "false")

if USE_CUDA.lower() == "true":
    try:
        import torch

        assert torch.cuda.is_available(), "CUDA not available"
        DEVICE_TYPE = "cuda"
    except Exception as e:
        cuda_error = (
            "Error when testing CUDA but USE_CUDA_DOCKER is true. "
            f"Resetting USE_CUDA_DOCKER to false: {e}"
        )
        os.environ["USE_CUDA_DOCKER"] = "false"
        USE_CUDA = "false"
        DEVICE_TYPE = "cpu"
else:
    DEVICE_TYPE = "cpu"


####################################
# LOGGING
####################################

log_levels = ["CRITICAL", "ERROR", "WARNING", "INFO", "DEBUG"]

GLOBAL_LOG_LEVEL = os.environ.get("GLOBAL_LOG_LEVEL", "").upper()
if GLOBAL_LOG_LEVEL in log_levels:
    logging.basicConfig(stream=sys.stdout, level=GLOBAL_LOG_LEVEL, force=True)
else:
    GLOBAL_LOG_LEVEL = "INFO"

log = logging.getLogger(__name__)
log.info(f"GLOBAL_LOG_LEVEL: {GLOBAL_LOG_LEVEL}")

if "cuda_error" in locals():
    log.exception(cuda_error)

log_sources = [
    "AUDIO",
    "COMFYUI",
    "CONFIG",
    "DB",
    "IMAGES",
    "MAIN",
    "MODELS",
    "OLLAMA",
    "OPENAI",
    "RAG",
    "WEBHOOK",
    "SOCKET",
]

SRC_LOG_LEVELS = {}

for source in log_sources:
    log_env_var = source + "_LOG_LEVEL"
    SRC_LOG_LEVELS[source] = os.environ.get(log_env_var, "").upper()
    if SRC_LOG_LEVELS[source] not in log_levels:
        SRC_LOG_LEVELS[source] = GLOBAL_LOG_LEVEL
    log.info(f"{log_env_var}: {SRC_LOG_LEVELS[source]}")

log.setLevel(SRC_LOG_LEVELS["CONFIG"])


WEBUI_NAME = os.environ.get("WEBUI_NAME", "Open WebUI")
if WEBUI_NAME != "Open WebUI":
    WEBUI_NAME += " (Open WebUI)"

WEBUI_URL = os.environ.get("WEBUI_URL", "http://localhost:3000")

WEBUI_FAVICON_URL = "https://openwebui.com/favicon.png"


####################################
# ENV (dev,test,prod)
####################################

ENV = os.environ.get("ENV", "dev")

FROM_INIT_PY = os.environ.get("FROM_INIT_PY", "False").lower() == "true"

if FROM_INIT_PY:
    PACKAGE_DATA = {"version": importlib.metadata.version("open-webui")}
else:
    try:
        PACKAGE_DATA = json.loads((BASE_DIR / "package.json").read_text())
    except Exception:
        PACKAGE_DATA = {"version": "0.0.0"}


VERSION = PACKAGE_DATA["version"]


# Function to parse each section
def parse_section(section):
    items = []
    for li in section.find_all("li"):
        # Extract raw HTML string
        raw_html = str(li)

        # Extract text without HTML tags
        text = li.get_text(separator=" ", strip=True)

        # Split into title and content
        parts = text.split(": ", 1)
        title = parts[0].strip() if len(parts) > 1 else ""
        content = parts[1].strip() if len(parts) > 1 else text

        items.append({"title": title, "content": content, "raw": raw_html})
    return items


try:
    changelog_path = BASE_DIR / "CHANGELOG.md"
    with open(str(changelog_path.absolute()), "r", encoding="utf8") as file:
        changelog_content = file.read()

except Exception:
    changelog_content = (pkgutil.get_data("open_webui", "CHANGELOG.md") or b"").decode()


# Convert markdown content to HTML
html_content = markdown.markdown(changelog_content)

# Parse the HTML content
soup = BeautifulSoup(html_content, "html.parser")

# Initialize JSON structure
changelog_json = {}

# Iterate over each version
for version in soup.find_all("h2"):
    version_number = version.get_text().strip().split(" - ")[0][1:-1]  # Remove brackets
    date = version.get_text().strip().split(" - ")[1]

    version_data = {"date": date}

    # Find the next sibling that is a h3 tag (section title)
    current = version.find_next_sibling()

    while current and current.name != "h2":
        if current.name == "h3":
            section_title = current.get_text().lower()  # e.g., "added", "fixed"
            section_items = parse_section(current.find_next_sibling("ul"))
            version_data[section_title] = section_items

        # Move to the next element
        current = current.find_next_sibling()

    changelog_json[version_number] = version_data


CHANGELOG = changelog_json

####################################
# SAFE_MODE
####################################

SAFE_MODE = os.environ.get("SAFE_MODE", "false").lower() == "true"

####################################
# WEBUI_BUILD_HASH
####################################

WEBUI_BUILD_HASH = os.environ.get("WEBUI_BUILD_HASH", "dev-build")

####################################
# DATA/FRONTEND BUILD DIR
####################################

DATA_DIR = Path(os.getenv("DATA_DIR", BACKEND_DIR / "data")).resolve()

if FROM_INIT_PY:
    NEW_DATA_DIR = Path(os.getenv("DATA_DIR", OPEN_WEBUI_DIR / "data")).resolve()
    NEW_DATA_DIR.mkdir(parents=True, exist_ok=True)

    # Check if the data directory exists in the package directory
    if DATA_DIR.exists() and DATA_DIR != NEW_DATA_DIR:
        log.info(f"Moving {DATA_DIR} to {NEW_DATA_DIR}")
        for item in DATA_DIR.iterdir():
            dest = NEW_DATA_DIR / item.name
            if item.is_dir():
                shutil.copytree(item, dest, dirs_exist_ok=True)
            else:
                shutil.copy2(item, dest)

        # Zip the data directory
        shutil.make_archive(DATA_DIR.parent / "open_webui_data", "zip", DATA_DIR)

        # Remove the old data directory
        shutil.rmtree(DATA_DIR)

    DATA_DIR = Path(os.getenv("DATA_DIR", OPEN_WEBUI_DIR / "data"))


FONTS_DIR = Path(os.getenv("FONTS_DIR", OPEN_WEBUI_DIR / "static" / "fonts"))

FRONTEND_BUILD_DIR = Path(os.getenv("FRONTEND_BUILD_DIR", BASE_DIR / "build")).resolve()

if FROM_INIT_PY:
    FRONTEND_BUILD_DIR = Path(
        os.getenv("FRONTEND_BUILD_DIR", OPEN_WEBUI_DIR / "frontend")
    ).resolve()


####################################
# Database
####################################

# Check if the file exists
if os.path.exists(f"{DATA_DIR}/ollama.db"):
    # Rename the file
    os.rename(f"{DATA_DIR}/ollama.db", f"{DATA_DIR}/webui.db")
    log.info("Database migrated from Ollama-WebUI successfully.")
else:
    pass

DATABASE_URL = os.environ.get("DATABASE_URL", f"sqlite:///{DATA_DIR}/webui.db")

# Replace the postgres:// with postgresql://
if "postgres://" in DATABASE_URL:
    DATABASE_URL = DATABASE_URL.replace("postgres://", "postgresql://")

DATABASE_POOL_SIZE = os.environ.get("DATABASE_POOL_SIZE", 0)

if DATABASE_POOL_SIZE == "":
    DATABASE_POOL_SIZE = 0
else:
    try:
        DATABASE_POOL_SIZE = int(DATABASE_POOL_SIZE)
    except Exception:
        DATABASE_POOL_SIZE = 0

DATABASE_POOL_MAX_OVERFLOW = os.environ.get("DATABASE_POOL_MAX_OVERFLOW", 0)

if DATABASE_POOL_MAX_OVERFLOW == "":
    DATABASE_POOL_MAX_OVERFLOW = 0
else:
    try:
        DATABASE_POOL_MAX_OVERFLOW = int(DATABASE_POOL_MAX_OVERFLOW)
    except Exception:
        DATABASE_POOL_MAX_OVERFLOW = 0

DATABASE_POOL_TIMEOUT = os.environ.get("DATABASE_POOL_TIMEOUT", 30)

if DATABASE_POOL_TIMEOUT == "":
    DATABASE_POOL_TIMEOUT = 30
else:
    try:
        DATABASE_POOL_TIMEOUT = int(DATABASE_POOL_TIMEOUT)
    except Exception:
        DATABASE_POOL_TIMEOUT = 30

DATABASE_POOL_RECYCLE = os.environ.get("DATABASE_POOL_RECYCLE", 3600)

if DATABASE_POOL_RECYCLE == "":
    DATABASE_POOL_RECYCLE = 3600
else:
    try:
        DATABASE_POOL_RECYCLE = int(DATABASE_POOL_RECYCLE)
    except Exception:
        DATABASE_POOL_RECYCLE = 3600

RESET_CONFIG_ON_START = (
    os.environ.get("RESET_CONFIG_ON_START", "False").lower() == "true"
)

####################################
# WEBUI_AUTH (Required for security)
####################################

WEBUI_AUTH = os.environ.get("WEBUI_AUTH", "True").lower() == "true"
WEBUI_AUTH_TRUSTED_EMAIL_HEADER = os.environ.get(
    "WEBUI_AUTH_TRUSTED_EMAIL_HEADER", None
)
WEBUI_AUTH_TRUSTED_NAME_HEADER = os.environ.get("WEBUI_AUTH_TRUSTED_NAME_HEADER", None)


####################################
# WEBUI_SECRET_KEY
####################################

WEBUI_SECRET_KEY = os.environ.get(
    "WEBUI_SECRET_KEY",
    os.environ.get(
        "WEBUI_JWT_SECRET_KEY", "t0p-s3cr3t"
    ),  # DEPRECATED: remove at next major version
)

WEBUI_SESSION_COOKIE_SAME_SITE = os.environ.get(
    "WEBUI_SESSION_COOKIE_SAME_SITE",
    os.environ.get("WEBUI_SESSION_COOKIE_SAME_SITE", "lax"),
)

WEBUI_SESSION_COOKIE_SECURE = os.environ.get(
    "WEBUI_SESSION_COOKIE_SECURE",
    os.environ.get("WEBUI_SESSION_COOKIE_SECURE", "false").lower() == "true",
)

if WEBUI_AUTH and WEBUI_SECRET_KEY == "":
    raise ValueError(ERROR_MESSAGES.ENV_VAR_NOT_FOUND)

ENABLE_WEBSOCKET_SUPPORT = (
    os.environ.get("ENABLE_WEBSOCKET_SUPPORT", "True").lower() == "true"
)

WEBSOCKET_MANAGER = os.environ.get("WEBSOCKET_MANAGER", "")

WEBSOCKET_REDIS_URL = os.environ.get("WEBSOCKET_REDIS_URL", "redis://localhost:6379/0")


AIOHTTP_CLIENT_TIMEOUT = os.environ.get("AIOHTTP_CLIENT_TIMEOUT", "")

if AIOHTTP_CLIENT_TIMEOUT == "":
    AIOHTTP_CLIENT_TIMEOUT = None
else:
    try:
        AIOHTTP_CLIENT_TIMEOUT = int(AIOHTTP_CLIENT_TIMEOUT)
    except Exception:
        AIOHTTP_CLIENT_TIMEOUT = 300