"""System introspection tools for Timmy to query his own environment.

This provides true sovereignty - Timmy introspects his environment rather than
being told about it in the system prompt.
"""

import logging
import platform
import sqlite3
import sys
from contextlib import closing
from datetime import UTC, datetime
from pathlib import Path
from typing import Any

import httpx

logger = logging.getLogger(__name__)


def get_system_info() -> dict[str, Any]:
    """Introspect the runtime environment to discover system information.

    Returns:
        Dict containing:
        - python_version: Python version
        - platform: OS platform
        - model: Current Ollama model (queried from API)
        - model_backend: Configured backend (ollama/grok/claude)
        - ollama_url: Ollama host URL
        - repo_root: Repository root path
        - grok_enabled: Whether GROK is enabled
        - spark_enabled: Whether Spark is enabled
        - memory_vault_exists: Whether memory vault is initialized
    """
    from config import settings

    info = {
        "python_version": f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}",
        "platform": platform.system(),
        "model_backend": settings.timmy_model_backend,
        "ollama_url": settings.ollama_url,
        "repo_root": settings.repo_root,
        "grok_enabled": settings.grok_enabled,
        "spark_enabled": settings.spark_enabled,
    }

    # Query Ollama for current model
    model_name = _get_ollama_model()
    info["model"] = model_name

    # Check if memory vault exists
    vault_path = Path(settings.repo_root) / "memory" / "self"
    info["memory_vault_exists"] = vault_path.exists()

    return info


def _get_ollama_model() -> str:
    """Query Ollama API to get the actual running model.

    Strategy:
    1. /api/ps — models currently loaded in memory (most accurate)
    2. /api/tags — all installed models (fallback)
    Both use exact name match to avoid prefix collisions
    (e.g. 'qwen3:8b' vs 'qwen3:30b').
    """
    from config import settings

    configured = settings.ollama_model

    try:
        # First: check actually loaded models via /api/ps
        response = httpx.get(f"{settings.ollama_url}/api/ps", timeout=5)
        if response.status_code == 200:
            running = response.json().get("models", [])
            for model in running:
                name = model.get("name", "")
                if name == configured or name == f"{configured}:latest":
                    return name
            # Configured model not loaded — return first running model
            # so Timmy reports what's *actually* serving his requests
            if running:
                return running[0].get("name", configured)

        # Second: check installed models via /api/tags (exact match)
        response = httpx.get(f"{settings.ollama_url}/api/tags", timeout=5)
        if response.status_code == 200:
            installed = response.json().get("models", [])
            for model in installed:
                name = model.get("name", "")
                if name == configured or name == f"{configured}:latest":
                    return configured
    except Exception as exc:
        logger.debug("Model validation failed: %s", exc)
        pass

    # Fallback to configured model
    return configured


def check_ollama_health() -> dict[str, Any]:
    """Check if Ollama is accessible and healthy.

    Returns:
        Dict with status, model, and available models
    """
    from config import settings

    result = {
        "accessible": False,
        "model": settings.ollama_model,
        "available_models": [],
        "error": None,
    }

    try:
        # Check tags endpoint
        response = httpx.get(f"{settings.ollama_url}/api/tags", timeout=5)
        if response.status_code == 200:
            result["accessible"] = True
            models = response.json().get("models", [])
            result["available_models"] = [m.get("name", "") for m in models]
    except Exception as e:
        logger.exception("Ollama health check failed")
        result["error"] = str(e)

    return result


def _hot_memory_info(repo_root: Path) -> dict[str, Any]:
    """Tier 1: Hot memory (MEMORY.md) status."""
    memory_md = repo_root / "MEMORY.md"
    tier1_exists = memory_md.exists()
    tier1_content = ""
    if tier1_exists:
        tier1_content = memory_md.read_text()[:500]

    info: dict[str, Any] = {
        "exists": tier1_exists,
        "path": str(memory_md),
        "preview": " ".join(tier1_content[:200].split()) if tier1_content else None,
    }
    if tier1_exists:
        lines = memory_md.read_text().splitlines()
        info["line_count"] = len(lines)
        info["sections"] = [ln.lstrip("# ").strip() for ln in lines if ln.startswith("## ")]
    return info


def _vault_info(repo_root: Path) -> dict[str, Any]:
    """Tier 2: Vault (memory/ directory tree) status."""
    vault_path = repo_root / "memory" / "self"
    tier2_exists = vault_path.exists()
    tier2_files = [f.name for f in vault_path.iterdir() if f.is_file()] if tier2_exists else []

    vault_root = repo_root / "memory"
    info: dict[str, Any] = {
        "exists": tier2_exists,
        "path": str(vault_path),
        "file_count": len(tier2_files),
        "files": tier2_files[:10],
    }
    if vault_root.exists():
        info["directories"] = [d.name for d in vault_root.iterdir() if d.is_dir()]
        info["total_markdown_files"] = sum(1 for _ in vault_root.rglob("*.md"))
    return info


def _semantic_memory_info(repo_root: Path) -> dict[str, Any]:
    """Tier 3: Semantic memory (vector DB) status."""
    info: dict[str, Any] = {"available": False}
    try:
        sem_db = repo_root / "data" / "memory.db"
        if sem_db.exists():
            with closing(sqlite3.connect(str(sem_db))) as conn:
                row = conn.execute(
                    "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='chunks'"
                ).fetchone()
                if row and row[0]:
                    count = conn.execute("SELECT COUNT(*) FROM chunks").fetchone()
                    info["available"] = True
                    info["vector_count"] = count[0] if count else 0
    except Exception as exc:
        logger.debug("Memory status query failed: %s", exc)
    return info


def _journal_info(repo_root: Path) -> dict[str, Any]:
    """Self-coding journal statistics."""
    info: dict[str, Any] = {"available": False}
    try:
        journal_db = repo_root / "data" / "self_coding.db"
        if journal_db.exists():
            with closing(sqlite3.connect(str(journal_db))) as conn:
                conn.row_factory = sqlite3.Row
                rows = conn.execute(
                    "SELECT outcome, COUNT(*) as cnt FROM modification_journal GROUP BY outcome"
                ).fetchall()
                if rows:
                    counts = {r["outcome"]: r["cnt"] for r in rows}
                    total = sum(counts.values())
                    info = {
                        "available": True,
                        "total_attempts": total,
                        "successes": counts.get("success", 0),
                        "failures": counts.get("failure", 0),
                        "success_rate": round(counts.get("success", 0) / total, 2) if total else 0,
                    }
    except Exception as exc:
        logger.debug("Journal stats query failed: %s", exc)
    return info


def get_memory_status() -> dict[str, Any]:
    """Get the status of Timmy's memory system.

    Returns:
        Dict with memory tier information
    """
    from config import settings

    repo_root = Path(settings.repo_root)

    return {
        "tier1_hot_memory": _hot_memory_info(repo_root),
        "tier2_vault": _vault_info(repo_root),
        "tier3_semantic": _semantic_memory_info(repo_root),
        "self_coding_journal": _journal_info(repo_root),
    }


def get_task_queue_status() -> dict[str, Any]:
    """Get current task queue status.

    The swarm task queue was removed. This returns a stub indicating
    the subsystem is not available.
    """
    return {
        "counts": {},
        "total": 0,
        "current_task": None,
        "note": "Task queue not available (swarm module removed)",
    }


def get_agent_roster() -> dict[str, Any]:
    """Get the agent roster from agents.yaml config.

    Returns:
        Dict with agent list and summary.
    """
    try:
        from timmy.agents.loader import list_agents

        agents = list_agents()
        roster = [
            {
                "id": a["id"],
                "name": a["name"],
                "status": a.get("status", "available"),
                "capabilities": ", ".join(a.get("tools", [])),
                "role": a.get("role", ""),
                "model": a.get("model", ""),
            }
            for a in agents
        ]

        return {
            "agents": roster,
            "total": len(roster),
        }
    except Exception as exc:
        logger.debug("Agent roster unavailable: %s", exc)
        return {"error": str(exc)}


def get_live_system_status() -> dict[str, Any]:
    """Comprehensive live system status — Timmy's primary introspection tool.

    Combines system info, task queue, agent roster, and memory status
    into a single snapshot. Each subsystem degrades gracefully.

    Returns:
        Dict with system, task_queue, agents, memory, and uptime sections.
    """
    result: dict[str, Any] = {}

    # System info
    try:
        result["system"] = get_system_info()
    except Exception as exc:
        logger.exception("Failed to get system info")
        result["system"] = {"error": str(exc)}

    # Task queue
    result["task_queue"] = get_task_queue_status()

    # Agent roster
    result["agents"] = get_agent_roster()

    # Memory status
    try:
        result["memory"] = get_memory_status()
    except Exception as exc:
        logger.exception("Failed to get memory status")
        result["memory"] = {"error": str(exc)}

    # Uptime
    try:
        from config import APP_START_TIME

        uptime = (datetime.now(UTC) - APP_START_TIME).total_seconds()
        result["uptime_seconds"] = int(uptime)
    except Exception as exc:
        logger.debug("Uptime calculation failed: %s", exc)
        result["uptime_seconds"] = None

    # Discord status
    try:
        from integrations.chat_bridge.vendors.discord import discord_bot

        result["discord"] = {"state": discord_bot.state.name}
    except Exception as exc:
        logger.debug("Discord status check failed: %s", exc)
        result["discord"] = {"state": "unknown"}

    result["timestamp"] = datetime.now(UTC).isoformat()
    return result


def _build_pytest_cmd(venv_python: Path, scope: str) -> list[str]:
    """Build the pytest command list for the given scope."""
    cmd = [str(venv_python), "-m", "pytest", "-x", "-q", "--tb=short", "--timeout=30"]

    if scope == "fast":
        cmd.extend(
            [
                "--ignore=tests/functional",
                "--ignore=tests/e2e",
                "--ignore=tests/integrations",
                "tests/",
            ]
        )
    elif scope == "full":
        cmd.append("tests/")
    else:
        cmd.append(scope)

    return cmd


def _parse_pytest_output(output: str) -> dict[str, int]:
    """Extract passed/failed/error counts from pytest output."""
    import re

    passed = failed = errors = 0
    for line in output.splitlines():
        if "passed" in line or "failed" in line or "error" in line:
            nums = re.findall(r"(\d+) (passed|failed|error)", line)
            for count, kind in nums:
                if kind == "passed":
                    passed = int(count)
                elif kind == "failed":
                    failed = int(count)
                elif kind == "error":
                    errors = int(count)

    return {"passed": passed, "failed": failed, "errors": errors}


def run_self_tests(scope: str = "fast", _repo_root: str | None = None) -> dict[str, Any]:
    """Run Timmy's own test suite and report results.

    A sovereign agent verifies his own integrity. This runs pytest
    on the codebase and returns a structured summary.

    Args:
        scope: Test scope — "fast" (unit tests only, ~30s timeout),
               "full" (all tests), or a specific path like "tests/timmy/"
        _repo_root: Optional repo root for testing (overrides settings)

    Returns:
        Dict with passed, failed, errors, total counts and summary text.
    """
    import subprocess

    from config import settings

    repo = _repo_root if _repo_root else settings.repo_root
    venv_python = Path(repo) / ".venv" / "bin" / "python"
    if not venv_python.exists():
        return {"success": False, "error": f"No venv found at {venv_python}"}

    cmd = _build_pytest_cmd(venv_python, scope)

    try:
        result = subprocess.run(cmd, capture_output=True, text=True, timeout=120, cwd=repo)
        output = result.stdout + result.stderr
        counts = _parse_pytest_output(output)

        return {
            "success": result.returncode == 0,
            **counts,
            "total": counts["passed"] + counts["failed"] + counts["errors"],
            "return_code": result.returncode,
            "summary": output[-2000:] if len(output) > 2000 else output,
        }
    except subprocess.TimeoutExpired:
        return {"success": False, "error": "Test run timed out (120s limit)"}
    except Exception as exc:
        logger.exception("Self-test run failed")
        return {"success": False, "error": str(exc)}