"""Name the thing each audit entry is about.

An audit row stores an entity type and id; the page shows the entity's
current name, linked to its page, in one query per type for the whole page.
An entity deleted since keeps whatever name the entry's own detail recorded.
"""
from __future__ import annotations

from sqlalchemy import select

from steward.ansible.inventory_gen import run_title, scope_labels
from steward.models.alerts import AlertRule, MaintenanceWindow
from steward.models.ansible import AnsibleRun
from steward.models.ansible_inventory import AnsibleGroup, AnsibleTarget
from steward.models.ansible_schedule import AnsibleSchedule
from steward.models.api_tokens import ApiToken
from steward.models.hosts import Host
from steward.models.monitors import Monitor

# entity_type -> (model, its page for an id). A type named by a value rather
# than a row (plugin, ansible_playbook) is its own label.
_NAMED = {
    "host": (Host, "/hosts/{}"),
    "monitor": (Monitor, "/monitors/{}"),
    "alert_rule": (AlertRule, "/alerts/history?rule={}"),
    "maintenance_window": (MaintenanceWindow, "/alerts/maintenance"),
    "ansible_target": (AnsibleTarget, "/ansible/inventory/targets/{}"),
    "ansible_group": (AnsibleGroup, "/ansible/inventory/groups/{}"),
    "ansible_schedule": (AnsibleSchedule, "/ansible/schedules"),
    "api_token": (ApiToken, "/ai-access/"),
}
_SELF_NAMED = {"plugin": "/settings/plugins/", "ansible_playbook": None}


def _recorded_name(detail: dict) -> str | None:
    """A name the entry recorded when it was written, for a deleted entity."""
    for key in ("name", "new_name", "username", "playbook"):
        if detail.get(key):
            return str(detail[key])
    return None


async def entity_labels(db, items: list[dict]) -> dict[tuple[str, str], dict]:
    """{(entity_type, entity_id): {"label", "url", "gone"}} for the audit rows
    in `items` ({"event", "detail"}), batched one query per type."""
    ids: dict[str, set[str]] = {}
    for it in items:
        e = it["event"]
        if e.entity_type and e.entity_id:
            ids.setdefault(e.entity_type, set()).add(str(e.entity_id))

    labels: dict[tuple[str, str], dict] = {}
    for etype, wanted in ids.items():
        if etype in _NAMED:
            model, page = _NAMED[etype]
            key_col = model.id
            keys = [int(i) for i in wanted if i.isdigit()] if etype == "api_token" else list(wanted)
            if not keys:
                continue
            for row_id, name in (await db.execute(
                    select(key_col, model.name).where(key_col.in_(keys)))).all():
                labels[(etype, str(row_id))] = {"label": name, "url": page.format(row_id), "gone": False}
        elif etype == "ansible_run":
            runs = (await db.execute(
                select(AnsibleRun).where(AnsibleRun.id.in_(list(wanted))))).scalars().all()
            scopes = await scope_labels(db, [r.inventory_scope for r in runs])
            for r in runs:
                labels[(etype, r.id)] = {
                    "label": run_title(r.playbook_path, scopes.get(r.inventory_scope, r.inventory_scope)),
                    "url": f"/ansible/runs/{r.id}", "gone": False}
        elif etype in _SELF_NAMED:
            for i in wanted:
                labels[(etype, i)] = {"label": i, "url": _SELF_NAMED[etype], "gone": False}

    # What a lookup did not find was deleted since: keep the name the entry recorded.
    for it in items:
        e = it["event"]
        if not (e.entity_type and e.entity_id):
            continue
        key = (e.entity_type, str(e.entity_id))
        if key not in labels:
            recorded = _recorded_name(it["detail"] or {})
            labels[key] = {"label": recorded or f"{str(e.entity_id)[:8]}", "url": None, "gone": True}
    return labels


# What each action did, said as the rest of a sentence that starts with who
# did it: "admin  paused monitor  api check". An action not listed here is
# shown by its code, which is also every row's tooltip and what the filter
# matches.
ACTIONS = {
    "auth.login": "signed in",
    "auth.login_failed": "failed to sign in",
    "auth.setup": "set up Steward",
    "host.created": "added host",
    "host.renamed": "renamed host",
    "host.deleted": "deleted host",
    "monitor.created": "added monitor",
    "monitor.updated": "changed monitor",
    "monitor.enabled": "resumed monitor",
    "monitor.disabled": "paused monitor",
    "monitor.deleted": "deleted monitor",
    "alert_rule.created": "added alert rule",
    "alert_rule.updated": "changed alert rule",
    "alert_rule.enabled": "turned on alert rule",
    "alert_rule.disabled": "turned off alert rule",
    "alert_rule.deleted": "deleted alert rule",
    "alert_rule.acknowledged": "acknowledged the alert from",
    "alert_rule.action_set": "set the playbook run by alert rule",
    "alert_rule.action_cleared": "removed the playbook from alert rule",
    "maintenance_window.created": "scheduled maintenance",
    "maintenance_window.deleted": "deleted maintenance window",
    "maintenance_window.ended": "ended maintenance window",
    "maintenance_window.cancelled": "cancelled maintenance window",
    "ansible.run.started": "started",
    "ansible.run.cancelled": "cancelled",
    "ansible.host_run": "ran a playbook on host",
    "ansible.schedule.created": "added schedule",
    "ansible.schedule.updated": "changed schedule",
    "ansible.schedule.enabled": "resumed schedule",
    "ansible.schedule.disabled": "paused schedule",
    "ansible.schedule.deleted": "deleted schedule",
    "ansible.schedule.run_now": "ran schedule now",
    "ansible.playbook.created": "added playbook",
    "ansible.playbook.updated": "edited playbook",
    "ansible.playbook.deleted": "deleted playbook",
    "ansible.target.created": "added inventory target",
    "ansible.target.updated": "changed inventory target",
    "ansible.target.deleted": "deleted inventory target",
    "ansible.group.created": "added inventory group",
    "ansible.group.updated": "changed inventory group",
    "ansible.group.deleted": "deleted inventory group",
    "settings.saved": "saved settings",
    "settings.notification.tested": "sent a test notification",
    "plugin.enabled": "turned on plugin",
    "plugin.disabled": "turned off plugin",
    "plugin.install": "installed plugin",
    "plugin.install_failed": "failed to install plugin",
    "plugin.settings_removed": "removed the settings of plugin",
    "api_token.create": "created AI access token",
    "api_token.revoke": "revoked AI access token",
    "docker.prune.started": "started a Docker cleanup on host",
}

# The filter's choices: an area, matched as a prefix of the action code.
AREAS = (("auth.", "Sign-ins"), ("host.", "Hosts"), ("monitor.", "Monitors"),
         ("alert_rule.", "Alert rules"), ("maintenance_window.", "Maintenance"),
         ("ansible.run", "Playbook runs"), ("ansible.", "Ansible (all)"),
         ("settings.", "Settings"), ("plugin.", "Plugins"), ("api_token.", "AI access"),
         ("docker.", "Docker"))


def action_text(action: str) -> str:
    return ACTIONS.get(action, action)


# Detail keys a row does not need to repeat: the entity column already names
# and links the thing, and the scope's own wording is shown in its place.
_SKIP = {"rule_id", "monitor_id", "host_id", "window_id", "schedule_id", "scope_label"}
_LABELS = {"check": "dry run", "interval_seconds": "every", "interval_s": "every",
           "bytes": "size", "renamed_from": "was", "token_id": "AI token", "vars": "variables",
           "extra_vars": "variables", "secret_vars": "secret variables", "sent": "delivered",
           "what": "removing", "address": "address", "carried": "history carried over"}
_METHODS = {"local": "password", "ldap": "LDAP", "oidc": "single sign-on"}
_SECTIONS = {"general": "General", "thresholds": "Thresholds", "notifications": "Notifications",
             "ansible.managed_key": "Ansible: managed SSH key",
             "ansible.credentials": "Ansible: credentials", "auth": "Authentication"}


def _plain(value) -> str:
    if isinstance(value, bool):
        return "yes" if value else "no"
    if isinstance(value, (list, tuple)):
        return ", ".join(_plain(v) for v in value) if value else "none"
    if isinstance(value, dict):
        return ", ".join(f"{str(k).replace('_', ' ')} {_plain(v)}" for k, v in value.items()) or "none"
    return str(value)


def detail_facts(detail: dict, scopes: dict[str, str]) -> list[dict]:
    """An entry's detail as [{"label", "text", "url"}] a reader can take in:
    yes/no for flags, lists joined, a run's scope in words (scope_labels),
    a span as a span, and nothing the entity column already says."""
    from steward.core.formatting import human_bytes, human_duration

    facts = []
    for key, value in (detail or {}).items():
        if key in _SKIP or value is None:
            continue
        label, url = _LABELS.get(key, key.replace("_", " ")), None
        if key == "scope":
            text = scopes.get(value, value)
        elif key in ("interval_seconds", "interval_s"):
            text = human_duration(value)
        elif key == "bytes":
            text = human_bytes(value)
        elif key == "method":
            text = _METHODS.get(value, value)
        elif key == "section":
            text = _SECTIONS.get(value, value)
        elif key == "token_id":
            text = f"#{value}"
        elif key == "run_id":
            label, text, url = "run", "open", f"/ansible/runs/{value}"
        else:
            text = _plain(value)
        facts.append({"label": label, "text": text, "url": url})
    return facts