"""
Mock implementation of emit_status_snapshot().
This will be replaced with real Series3 emitter logic by the user.
"""

from datetime import datetime, timedelta
import random


def emit_status_snapshot():
    """
    Mock function that returns fleet status snapshot.
    In production, this will call the real Series3 emitter logic.

    Returns a dictionary with unit statuses, ages, deployment status, etc.
    """

    # Mock data for demonstration
    mock_units = {
        "BE1234": {
            "status": "OK",
            "age": "1h 12m",
            "last": "2025-11-22 12:32:10",
            "fname": "evt_1234.mlg",
            "deployed": True,
            "note": "Bridge monitoring project - Golden Gate"
        },
        "BE5678": {
            "status": "Pending",
            "age": "2h 45m",
            "last": "2025-11-22 11:05:33",
            "fname": "evt_5678.mlg",
            "deployed": True,
            "note": "Dam structural analysis"
        },
        "BE9012": {
            "status": "Missing",
            "age": "5d 3h",
            "last": "2025-11-17 09:15:00",
            "fname": "evt_9012.mlg",
            "deployed": True,
            "note": "Tunnel excavation site"
        },
        "BE3456": {
            "status": "OK",
            "age": "30m",
            "last": "2025-11-22 13:20:45",
            "fname": "evt_3456.mlg",
            "deployed": False,
            "note": "Benched for maintenance"
        },
        "BE7890": {
            "status": "OK",
            "age": "15m",
            "last": "2025-11-22 13:35:22",
            "fname": "evt_7890.mlg",
            "deployed": True,
            "note": "Pipeline monitoring"
        },
        "BE2468": {
            "status": "Pending",
            "age": "4h 20m",
            "last": "2025-11-22 09:30:15",
            "fname": "evt_2468.mlg",
            "deployed": True,
            "note": "Building foundation survey"
        },
        "BE1357": {
            "status": "OK",
            "age": "45m",
            "last": "2025-11-22 13:05:00",
            "fname": "evt_1357.mlg",
            "deployed": False,
            "note": "Awaiting deployment"
        },
        "BE8642": {
            "status": "Missing",
            "age": "2d 12h",
            "last": "2025-11-20 01:30:00",
            "fname": "evt_8642.mlg",
            "deployed": True,
            "note": "Offshore platform - comms issue suspected"
        }
    }

    return {
        "units": mock_units,
        "timestamp": datetime.now().isoformat(),
        "total_units": len(mock_units),
        "deployed_units": sum(1 for u in mock_units.values() if u["deployed"]),
        "status_summary": {
            "OK": sum(1 for u in mock_units.values() if u["status"] == "OK"),
            "Pending": sum(1 for u in mock_units.values() if u["status"] == "Pending"),
            "Missing": sum(1 for u in mock_units.values() if u["status"] == "Missing")
        }
    }