"""Drive endpoints — list, drawer, edit, SMART start/cancel, reset, unlock.

  GET   /api/v1/drives
  GET   /api/v1/drives/{id}/drawer
  GET   /api/v1/drives/{id}
  PATCH /api/v1/drives/{id}                — notes / location update
  POST  /api/v1/drives/{id}/smart/start
  POST  /api/v1/drives/{id}/smart/cancel
  POST  /api/v1/drives/{id}/reset
  POST  /api/v1/drives/{id}/unlock         — pool-membership lock override
"""

from __future__ import annotations

import json as _json
from datetime import datetime, timezone

import aiosqlite
from fastapi import APIRouter, Depends, HTTPException, Request

from app import auth, burnin, poller
from app.database import get_db
from app.models import (
    DriveResponse, UnlockPoolDriveRequest, UpdateDriveRequest,
)

from ._drives_helpers import _DRIVES_QUERY, _row_to_drive
from ._helpers import client_ip, operator_for

router = APIRouter()


@router.get("/api/v1/drives", response_model=list[DriveResponse])
async def list_drives(db: aiosqlite.Connection = Depends(get_db)):
    cur = await db.execute(_DRIVES_QUERY.format(where=""))
    rows = await cur.fetchall()
    return [_row_to_drive(r) for r in rows]


@router.get("/api/v1/drives/{drive_id}/drawer")
async def drive_drawer(drive_id: int, db: aiosqlite.Connection = Depends(get_db)):
    """Data for the log drawer — latest burn-in job + stages, SMART tests, audit events."""
    cur = await db.execute(_DRIVES_QUERY.format(where="AND d.id = ?"), (drive_id,))
    row = await cur.fetchone()
    if not row:
        raise HTTPException(status_code=404, detail="Drive not found")
    drive = _row_to_drive(row)

    # Latest burn-in job + its stages (include log_text and bad_blocks)
    cur = await db.execute(
        "SELECT * FROM burnin_jobs WHERE drive_id=? ORDER BY id DESC LIMIT 1",
        (drive_id,),
    )
    job_row = await cur.fetchone()
    burnin_job = None
    if job_row:
        job = dict(job_row)
        cur = await db.execute(
            "SELECT id, stage_name, state, percent, started_at, finished_at, "
            "duration_seconds, error_text, log_text, bad_blocks "
            "FROM burnin_stages WHERE burnin_job_id=? ORDER BY id",
            (job_row["id"],),
        )
        job["stages"] = [dict(r) for r in await cur.fetchall()]
        burnin_job = job

    # SMART raw output from smart_tests table
    cur = await db.execute(
        "SELECT test_type, state, percent, started_at, finished_at, error_text, raw_output "
        "FROM smart_tests WHERE drive_id=?",
        (drive_id,),
    )
    smart_rows = {r["test_type"]: dict(r) for r in await cur.fetchall()}

    # Cached SMART attributes (JSON blob on drives table)
    smart_attrs = None
    cur = await db.execute("SELECT smart_attrs FROM drives WHERE id=?", (drive_id,))
    attrs_row = await cur.fetchone()
    if attrs_row and attrs_row["smart_attrs"]:
        try:
            smart_attrs = _json.loads(attrs_row["smart_attrs"])
        except Exception:
            pass

    # Last 50 audit events for this drive (newest first)
    cur = await db.execute("""
        SELECT id, event_type, operator, message, created_at
        FROM audit_events
        WHERE drive_id = ?
        ORDER BY id DESC
        LIMIT 50
    """, (drive_id,))
    events = [dict(r) for r in await cur.fetchall()]

    def _smart_card(test_type: str) -> dict:
        smart_obj = drive.smart_short if test_type == "short" else drive.smart_long
        base = smart_obj.model_dump() if smart_obj else {}
        row = smart_rows.get(test_type, {})
        base["raw_output"] = row.get("raw_output")
        return base

    return {
        "drive": {
            "id":         drive.id,
            "devname":    drive.devname,
            "serial":     drive.serial,
            "model":      drive.model,
            "size_bytes": drive.size_bytes,
        },
        "burnin":      burnin_job,
        "smart": {
            "short":       _smart_card("short"),
            "long":        _smart_card("long"),
            "attrs":       smart_attrs,
        },
        "events":      events,
    }


@router.get("/api/v1/drives/{drive_id}", response_model=DriveResponse)
async def get_drive(drive_id: int, db: aiosqlite.Connection = Depends(get_db)):
    cur = await db.execute(
        _DRIVES_QUERY.format(where="AND d.id = ?"), (drive_id,)
    )
    row = await cur.fetchone()
    if not row:
        raise HTTPException(status_code=404, detail="Drive not found")
    return _row_to_drive(row)


@router.post("/api/v1/drives/{drive_id}/smart/start")
async def smart_start(
    drive_id: int,
    body: dict,
    db: aiosqlite.Connection = Depends(get_db),
):
    """Start a standalone SHORT or LONG SMART test on a single drive.

    Uses SSH (smartctl) when configured — required for TrueNAS SCALE 25.10+
    where the REST smart/test endpoint no longer exists.
    Falls back to TrueNAS REST API for older versions.
    """
    from app import ssh_client

    test_type = (body.get("type") or "").upper()
    if test_type not in ("SHORT", "LONG"):
        raise HTTPException(status_code=422, detail="type must be SHORT or LONG")

    cur = await db.execute("SELECT devname FROM drives WHERE id=?", (drive_id,))
    row = await cur.fetchone()
    if not row:
        raise HTTPException(status_code=404, detail="Drive not found")
    devname = row[0]

    now = datetime.now(timezone.utc).isoformat()
    ttype_lower = test_type.lower()

    if ssh_client.is_configured():
        # SSH path — works on TrueNAS SCALE 25.10+ and CORE
        try:
            output = await ssh_client.start_smart_test(devname, test_type)
        except Exception as exc:
            raise HTTPException(status_code=502, detail=f"SSH error: {exc}")

        # Mark as running in DB (truenas_job_id=NULL signals SSH-managed test)
        # Store smartctl start output as proof the test was initiated
        await db.execute(
            """INSERT INTO smart_tests (drive_id, test_type, state, percent, started_at, raw_output)
               VALUES (?,?,?,?,?,?)
               ON CONFLICT(drive_id, test_type) DO UPDATE SET
                   state='running', percent=0, truenas_job_id=NULL,
                   started_at=excluded.started_at, finished_at=NULL, error_text=NULL,
                   raw_output=excluded.raw_output""",
            (drive_id, ttype_lower, "running", 0, now, output),
        )
        await db.commit()
        poller._notify_subscribers()
        return {"devname": devname, "type": test_type, "message": output[:200]}

    else:
        # REST path — older TrueNAS CORE / SCALE versions
        client = burnin._client
        if client is None:
            raise HTTPException(status_code=503, detail="TrueNAS client not ready")
        try:
            tn_job_id = await client.start_smart_test([devname], test_type)
        except Exception as exc:
            raise HTTPException(status_code=502, detail=f"TrueNAS error: {exc}")
        return {"job_id": tn_job_id, "devname": devname, "type": test_type}


@router.post("/api/v1/drives/{drive_id}/smart/cancel")
async def smart_cancel(
    drive_id: int,
    body: dict,
    db: aiosqlite.Connection = Depends(get_db),
):
    """Cancel a running standalone SMART test on a drive."""
    test_type = (body.get("type") or "").lower()
    if test_type not in ("short", "long"):
        raise HTTPException(status_code=422, detail="type must be 'short' or 'long'")

    cur = await db.execute("SELECT devname FROM drives WHERE id=?", (drive_id,))
    row = await cur.fetchone()
    if not row:
        raise HTTPException(status_code=404, detail="Drive not found")
    devname = row[0]

    client = burnin._client
    if client is None:
        raise HTTPException(status_code=503, detail="TrueNAS client not ready")

    from app import ssh_client

    if ssh_client.is_configured():
        # SSH path — abort via smartctl -X
        try:
            await ssh_client.abort_smart_test(devname)
        except Exception as exc:
            raise HTTPException(status_code=502, detail=f"SSH abort error: {exc}")
    else:
        # REST path — find TrueNAS job and abort it
        try:
            jobs = await client.get_smart_jobs()
            tn_job_id = None
            for j in jobs:
                if j.get("state") != "RUNNING":
                    continue
                args = j.get("arguments", [])
                if not args or not isinstance(args[0], dict):
                    continue
                if devname in args[0].get("disks", []):
                    tn_job_id = j["id"]
                    break

            if tn_job_id is None:
                raise HTTPException(status_code=404, detail="No running SMART test found for this drive")

            await client.abort_job(tn_job_id)
        except HTTPException:
            raise
        except Exception as exc:
            raise HTTPException(status_code=502, detail=f"TrueNAS error: {exc}")

    # Update local DB state
    now = datetime.now(timezone.utc).isoformat()
    await db.execute(
        "UPDATE smart_tests SET state='aborted', finished_at=? WHERE drive_id=? AND test_type=? AND state='running'",
        (now, drive_id, test_type),
    )
    await db.commit()

    return {"cancelled": True, "devname": devname, "type": test_type}


@router.patch("/api/v1/drives/{drive_id}")
async def update_drive(
    drive_id: int,
    req: UpdateDriveRequest,
    db: aiosqlite.Connection = Depends(get_db),
):
    cur = await db.execute("SELECT id FROM drives WHERE id=?", (drive_id,))
    if not await cur.fetchone():
        raise HTTPException(status_code=404, detail="Drive not found")

    await db.execute(
        "UPDATE drives SET notes=?, location=? WHERE id=?",
        (req.notes, req.location, drive_id),
    )
    await db.commit()
    return {"updated": True}


@router.post("/api/v1/drives/{drive_id}/reset")
async def reset_drive(
    drive_id: int,
    request: Request,
    body: dict,
    db: aiosqlite.Connection = Depends(get_db),
):
    """
    Clear SMART test results for a drive so it shows as fresh.
    Only allowed when no burn-in job is active (queued or running).
    Preserves all job history — just resets the display state.
    """
    cur = await db.execute("SELECT id FROM drives WHERE id=?", (drive_id,))
    if not await cur.fetchone():
        raise HTTPException(status_code=404, detail="Drive not found")

    # Reject if any active burn-in
    cur = await db.execute(
        "SELECT COUNT(*) FROM burnin_jobs WHERE drive_id=? AND state IN ('queued','running')",
        (drive_id,),
    )
    if (await cur.fetchone())[0] > 0:
        raise HTTPException(status_code=409, detail="Cannot reset while a burn-in is active")

    # Trust the logged-in user, not the body (the JS used to send a
    # literal "operator" because window._operator was never set).
    operator = operator_for(request, body.get("operator"))

    # Reset SMART test state to idle
    await db.execute(
        """UPDATE smart_tests SET state='idle', percent=0, started_at=NULL,
           eta_at=NULL, finished_at=NULL, error_text=NULL, raw_output=NULL
           WHERE drive_id=?""",
        (drive_id,),
    )
    # Clear SMART attrs cache + stamp reset time (hides prior burn-in from dashboard)
    now = datetime.now(timezone.utc).isoformat()
    await db.execute(
        "UPDATE drives SET smart_attrs=NULL, last_reset_at=? WHERE id=?",
        (now, drive_id),
    )

    # Audit event
    await db.execute(
        """INSERT INTO audit_events (event_type, drive_id, operator, message)
           VALUES (?,?,?,?)""",
        ("drive_reset", drive_id, operator, "Drive reset — SMART state cleared"),
    )
    await db.commit()

    poller._notify_subscribers()
    return {"reset": True}


@router.post("/api/v1/drives/{drive_id}/unlock")
async def unlock_pool_drive(drive_id: int, request: Request, req: UnlockPoolDriveRequest):
    operator = operator_for(request, req.operator)
    ip = client_ip(request)
    # Rate-limit by drive AND by source IP. A typo on the confirm token
    # is the common case so the threshold is loose, but a brute-force
    # attempt to guess the token still hits the IP cap.
    keys = (("drive", drive_id), ("ip", ip))
    attempt = auth.unlock_limiter.register(*keys)
    if attempt != "ok":
        raise HTTPException(
            status_code=429,
            detail="Too many unlock attempts on this drive. Try again later.",
        )
    try:
        expiry = await burnin.grant_pool_unlock(
            drive_id, req.confirm_token, operator, req.reason,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc))
    auth.unlock_limiter.clear(*keys)
    # Read from the submodule, not the package-root snapshot alias —
    # keeps tests that monkey-patch UNLOCK_TTL_SECONDS in
    # app.burnin.unlock observable from the API response.
    return {"unlocked": True, "expires_at": expiry,
            "ttl_seconds": burnin.unlock.UNLOCK_TTL_SECONDS}