from pathlib import Path
import os
import logging
import sys
import json


import importlib.metadata
import pkgutil
from urllib.parse import urlparse
from datetime import datetime


import markdown
from bs4 import BeautifulSoup

from constants import ERROR_MESSAGES

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

BACKEND_DIR = Path(__file__).parent  # the path containing this file
BASE_DIR = BACKEND_DIR.parent  # the path containing the backend/

print(BASE_DIR)

try:
    from dotenv import load_dotenv, find_dotenv

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


####################################
# 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}")

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

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")

try:
    PACKAGE_DATA = json.loads((BASE_DIR / "package.json").read_text())
except Exception:
    try:
        PACKAGE_DATA = {"version": importlib.metadata.version("open-webui")}
    except importlib.metadata.PackageNotFoundError:
        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()
FRONTEND_BUILD_DIR = Path(os.getenv("FRONTEND_BUILD_DIR", BASE_DIR / "build")).resolve()

RESET_CONFIG_ON_START = (
    os.environ.get("RESET_CONFIG_ON_START", "False").lower() == "true"
)
if RESET_CONFIG_ON_START:
    try:
        os.remove(f"{DATA_DIR}/config.json")
        with open(f"{DATA_DIR}/config.json", "w") as f:
            f.write("{}")
    except Exception:
        pass

try:
    CONFIG_DATA = json.loads((DATA_DIR / "config.json").read_text())
except Exception:
    CONFIG_DATA = {}


####################################
# 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://")


####################################
# 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)