"""
Offline mode routes - Asset management and settings for offline operation.
"""

import os

from flask import Blueprint, request

from utils.database import get_setting, set_setting
from utils.responses import api_error, api_success

offline_bp = Blueprint("offline", __name__, url_prefix="/offline")

# Default offline settings
OFFLINE_DEFAULTS = {
    "offline.enabled": False,
    # Default to bundled assets/fonts to avoid third-party CDN privacy blocks.
    "offline.assets_source": "local",
    "offline.fonts_source": "local",
    "offline.tile_provider": "cartodb_dark_cyan",
    "offline.tile_server_url": "",
    "offline.stadia_key": "",
}

# Asset paths to check
ASSET_PATHS = {
    "leaflet": ["static/vendor/leaflet/leaflet.js", "static/vendor/leaflet/leaflet.css"],
    "chartjs": ["static/vendor/chartjs/chart.umd.min.js"],
    "inter": [
        "static/vendor/fonts/Inter-Regular.woff2",
        "static/vendor/fonts/Inter-Medium.woff2",
        "static/vendor/fonts/Inter-SemiBold.woff2",
        "static/vendor/fonts/Inter-Bold.woff2",
    ],
    "jetbrains": [
        "static/vendor/fonts/JetBrainsMono-Regular.woff2",
        "static/vendor/fonts/JetBrainsMono-Medium.woff2",
        "static/vendor/fonts/JetBrainsMono-SemiBold.woff2",
        "static/vendor/fonts/JetBrainsMono-Bold.woff2",
    ],
    "leaflet_images": [
        "static/vendor/leaflet/images/marker-icon.png",
        "static/vendor/leaflet/images/marker-icon-2x.png",
        "static/vendor/leaflet/images/marker-shadow.png",
        "static/vendor/leaflet/images/layers.png",
        "static/vendor/leaflet/images/layers-2x.png",
    ],
    "leaflet_heat": ["static/vendor/leaflet-heat/leaflet-heat.js"],
}


def get_offline_settings():
    """Get all offline settings with defaults."""
    settings = {}
    for key, default in OFFLINE_DEFAULTS.items():
        settings[key] = get_setting(key, default)
    return settings


@offline_bp.route("/settings", methods=["GET"])
def get_settings():
    """Get current offline settings."""
    settings = get_offline_settings()
    return api_success(data={"settings": settings})


@offline_bp.route("/settings", methods=["POST"])
def save_setting():
    """Save an offline setting."""
    data = request.get_json()
    if not data or "key" not in data or "value" not in data:
        return api_error("Missing key or value", 400)

    key = data["key"]
    value = data["value"]

    # Validate key is an allowed setting
    if key not in OFFLINE_DEFAULTS:
        return api_error(f"Unknown setting: {key}", 400)

    # Validate value type matches default
    default_type = type(OFFLINE_DEFAULTS[key])
    if not isinstance(value, default_type):
        # Try to convert
        try:
            if default_type == bool:
                value = str(value).lower() in ("true", "1", "yes")
            else:
                value = default_type(value)
        except (ValueError, TypeError):
            return api_error(f"Invalid value type for {key}", 400)

    set_setting(key, value)

    return api_success(data={"key": key, "value": value})


@offline_bp.route("/status", methods=["GET"])
def get_status():
    """Check status of local assets."""
    # Get the app root directory
    app_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

    results = {}
    all_available = True

    for asset_name, paths in ASSET_PATHS.items():
        available = True
        missing = []
        for path in paths:
            full_path = os.path.join(app_root, path)
            if not os.path.exists(full_path):
                available = False
                missing.append(path)

        results[asset_name] = {"available": available, "missing": missing if not available else []}

        if not available:
            all_available = False

    return api_success(
        data={
            "all_available": all_available,
            "assets": results,
            "offline_enabled": get_setting("offline.enabled", False),
        }
    )


@offline_bp.route("/check-asset", methods=["GET"])
def check_asset():
    """Check if a specific asset file exists."""
    path = request.args.get("path", "")
    if not path:
        return api_error("Missing path parameter", 400)

    # Security: only allow checking within static/vendor
    if not path.startswith("/static/vendor/"):
        return api_error("Invalid path", 400)

    # Remove leading slash and construct full path
    relative_path = path.lstrip("/")
    app_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    full_path = os.path.join(app_root, relative_path)

    exists = os.path.exists(full_path)

    return api_success(data={"path": path, "exists": exists})