"""Burn-in history pages: paginated list + per-job detail + print view.

  GET /history             — filterable + paginated list
  GET /history/{job_id}    — per-job detail with stages
  GET /history/{job_id}/print — clean print-friendly variant
"""

from __future__ import annotations

import aiosqlite
from fastapi import APIRouter, Depends, HTTPException, Query, Request
from fastapi.responses import HTMLResponse

from app import poller
from app.database import get_db
from app.renderer import templates

from ._helpers import stale_context

router = APIRouter()


_PAGE_SIZE = 50

_ALL_STATES = ("queued", "running", "passed", "failed", "cancelled", "unknown")

_HISTORY_QUERY = """
    SELECT
        bj.id, bj.drive_id, bj.profile, bj.state, bj.operator,
        bj.created_at, bj.started_at, bj.finished_at, bj.error_text,
        d.devname, d.serial, d.model, d.size_bytes,
        CAST(
            (julianday(bj.finished_at) - julianday(bj.started_at)) * 86400
            AS INTEGER
        ) AS duration_seconds
    FROM burnin_jobs bj
    JOIN drives d ON d.id = bj.drive_id
    {where}
    ORDER BY bj.id DESC
"""


def _state_where(state: str) -> tuple[str, list]:
    if state == "all":
        return "", []
    return "WHERE bj.state = ?", [state]


@router.get("/history", response_class=HTMLResponse)
async def history_list(
    request: Request,
    state: str = Query(default="all"),
    page: int = Query(default=1, ge=1),
    db: aiosqlite.Connection = Depends(get_db),
):
    if state not in ("all",) + _ALL_STATES:
        state = "all"

    where_clause, params = _state_where(state)

    # Total count
    count_sql = f"SELECT COUNT(*) FROM burnin_jobs bj JOIN drives d ON d.id = bj.drive_id {where_clause}"  # nosec B608 — `where_clause` is one of two hardcoded literals from _state_where; user input goes through bound params.
    cur = await db.execute(count_sql, params)
    total_count = (await cur.fetchone())[0]
    total_pages = max(1, (total_count + _PAGE_SIZE - 1) // _PAGE_SIZE)
    page = min(page, total_pages)
    offset = (page - 1) * _PAGE_SIZE

    # Per-state counts for badges
    cur = await db.execute(
        "SELECT state, COUNT(*) FROM burnin_jobs GROUP BY state"
    )
    counts = {"all": total_count if state == "all" else 0}
    for r in await cur.fetchall():
        counts[r[0]] = r[1]
    if state != "all":
        cur2 = await db.execute("SELECT COUNT(*) FROM burnin_jobs")
        counts["all"] = (await cur2.fetchone())[0]

    # Job rows
    sql = _HISTORY_QUERY.format(where=where_clause) + " LIMIT ? OFFSET ?"
    cur = await db.execute(sql, params + [_PAGE_SIZE, offset])
    rows = await cur.fetchall()
    jobs = [dict(r) for r in rows]

    ps = poller.get_state()
    return templates.TemplateResponse(request, "history.html", {
        "request": request,
        "jobs": jobs,
        "active_state": state,
        "counts": counts,
        "page": page,
        "total_pages": total_pages,
        "total_count": total_count,
        "poller": ps,
        **stale_context(ps),
    })


# /history/{job_id}/print MUST be registered before /history/{job_id} so
# FastAPI's route matching tries the literal "print" before the int
# coercion would attempt int("print") and 422.

@router.get("/history/{job_id}/print", response_class=HTMLResponse)
async def history_print(
    request: Request,
    job_id: int,
    db: aiosqlite.Connection = Depends(get_db),
):
    cur = await db.execute("""
        SELECT
            bj.*, d.devname, d.serial, d.model, d.size_bytes,
            CAST(
                (julianday(bj.finished_at) - julianday(bj.started_at)) * 86400
                AS INTEGER
            ) AS duration_seconds
        FROM burnin_jobs bj
        JOIN drives d ON d.id = bj.drive_id
        WHERE bj.id = ?
    """, (job_id,))
    row = await cur.fetchone()
    if not row:
        raise HTTPException(status_code=404, detail="Job not found")
    job = dict(row)

    cur = await db.execute("""
        SELECT *,
            CAST(
                (julianday(finished_at) - julianday(started_at)) * 86400
                AS INTEGER
            ) AS duration_seconds
        FROM burnin_stages WHERE burnin_job_id=? ORDER BY id
    """, (job_id,))
    job["stages"] = [dict(r) for r in await cur.fetchall()]

    return templates.TemplateResponse(request, "job_print.html", {
        "request": request,
        "job":     job,
    })


@router.get("/history/{job_id}", response_class=HTMLResponse)
async def history_detail(
    request: Request,
    job_id: int,
    db: aiosqlite.Connection = Depends(get_db),
):
    # Job + drive info
    cur = await db.execute("""
        SELECT
            bj.*, d.devname, d.serial, d.model, d.size_bytes,
            CAST(
                (julianday(bj.finished_at) - julianday(bj.started_at)) * 86400
                AS INTEGER
            ) AS duration_seconds
        FROM burnin_jobs bj
        JOIN drives d ON d.id = bj.drive_id
        WHERE bj.id = ?
    """, (job_id,))
    row = await cur.fetchone()
    if not row:
        raise HTTPException(status_code=404, detail="Burn-in job not found")
    job = dict(row)

    # Stages (with duration)
    cur = await db.execute("""
        SELECT *,
            CAST(
                (julianday(finished_at) - julianday(started_at)) * 86400
                AS INTEGER
            ) AS duration_seconds
        FROM burnin_stages
        WHERE burnin_job_id = ?
        ORDER BY id
    """, (job_id,))
    job["stages"] = [dict(r) for r in await cur.fetchall()]

    ps = poller.get_state()
    return templates.TemplateResponse(request, "job_detail.html", {
        "request": request,
        "job": job,
        "poller": ps,
        **stale_context(ps),
    })