"""Sentry/GlitchTip observability and incident correlation loader for the console (#649, Phase 4).

Operators need to inspect provider connection status (Sentry/GlitchTip), error
correlations, and durable Gitea issue linkage — without treating raw incidents
as allocator work.

ADR authority model:
* Gitea owns work.
* Providers (Sentry/GlitchTip) observe incidents.
* Control-plane DB coordinates incident links.
* The #612 bridge reconciles observations into durable Gitea issues.
* The web console projects read-only state and gates mutations.

Redaction boundary:
* Provider auth tokens, DSNs, Authorization headers, and sensitive local file
  paths are ALWAYS redacted before leaving this module.
"""

from __future__ import annotations

import os
from dataclasses import dataclass
from typing import Any

from control_plane_db import ControlPlaneDB
import sentry_incident_bridge
from webui import console_redaction

OBSERVABILITY_SCHEMA_VERSION = 1


@dataclass(frozen=True)
class ProviderHealth:
    """Connection and health status of an observability provider."""

    provider: str
    base_url: str
    org: str
    project: str
    configured: bool
    status: str
    bridge_enabled: bool
    lookback: str
    min_events_for_issue: int
    self_hosted: bool
    environment: str | None = None
    credentials_present: bool = False

    def to_dict(self) -> dict[str, Any]:
        data = {
            "provider": self.provider,
            "base_url": self.base_url,
            "org": self.org,
            "project": self.project,
            "configured": self.configured,
            "status": self.status,
            "bridge_enabled": self.bridge_enabled,
            "lookback": self.lookback,
            "min_events_for_issue": self.min_events_for_issue,
            "self_hosted": self.self_hosted,
            "environment": self.environment,
            "credentials_present": self.credentials_present,
        }
        return console_redaction.redact_payload(data)


@dataclass(frozen=True)
class CorrelatedIncidentLink:
    """One linked provider incident ↔ Gitea issue correlation record."""

    link_id: int
    provider: str
    provider_base_url: str
    provider_org: str
    provider_project: str
    provider_issue_id: str
    provider_short_id: str | None
    provider_permalink: str | None
    fingerprint: str | None
    gitea_org: str
    gitea_repo: str
    gitea_issue_number: int
    linked_pr_numbers: list[int]
    last_seen: str | None
    event_count: int
    created_at: str | None
    updated_at: str | None

    def to_dict(self) -> dict[str, Any]:
        data = {
            "link_id": self.link_id,
            "provider": self.provider,
            "provider_base_url": self.provider_base_url,
            "provider_org": self.provider_org,
            "provider_project": self.provider_project,
            "provider_issue_id": self.provider_issue_id,
            "provider_short_id": self.provider_short_id,
            "provider_permalink": self.provider_permalink,
            "fingerprint": self.fingerprint,
            "gitea_org": self.gitea_org,
            "gitea_repo": self.gitea_repo,
            "gitea_issue_number": self.gitea_issue_number,
            "linked_pr_numbers": self.linked_pr_numbers,
            "last_seen": self.last_seen,
            "event_count": self.event_count,
            "created_at": self.created_at,
            "updated_at": self.updated_at,
        }
        return console_redaction.redact_payload(data)


@dataclass(frozen=True)
class ObservabilitySnapshot:
    """Read-only snapshot of observability provider status and incident correlations."""

    schema_version: int
    providers: list[ProviderHealth]
    links: list[CorrelatedIncidentLink]
    total_links: int
    sentry_links_count: int
    glitchtip_links_count: int
    bridge_active: bool

    def to_dict(self) -> dict[str, Any]:
        return {
            "schema_version": self.schema_version,
            "providers": [p.to_dict() for p in self.providers],
            "links": [link.to_dict() for link in self.links],
            "metrics": {
                "total_links": self.total_links,
                "sentry_links_count": self.sentry_links_count,
                "glitchtip_links_count": self.glitchtip_links_count,
                "bridge_active": self.bridge_active,
            },
        }


def load_provider_health(
    provider_name: str = "sentry",
    env: dict[str, str] | None = None,
) -> ProviderHealth:
    """Inspect configuration and connection health for an observability provider."""
    source_env = dict(env if env is not None else os.environ)
    if provider_name.lower() == "sentry":
        config = sentry_incident_bridge.load_bridge_config(source_env)
        token = sentry_incident_bridge.resolve_token(source_env)
        has_token = bool(token)
        configured = bool(config.org and config.project and has_token)

        if not config.org or not config.project:
            status = "not_configured"
        elif not has_token:
            status = "missing_token"
        elif not config.bridge_enabled:
            status = "disabled"
        else:
            status = "healthy"

        return ProviderHealth(
            provider="sentry",
            base_url=config.base_url,
            org=config.org or "unconfigured",
            project=config.project or "unconfigured",
            configured=configured,
            status=status,
            bridge_enabled=config.bridge_enabled,
            lookback=config.lookback,
            min_events_for_issue=config.min_events_for_issue,
            self_hosted=not config.base_url.rstrip("/").endswith("sentry.io"),
            environment=config.environment,
            credentials_present=has_token,
        )

    # GlitchTip or fallback provider configuration
    glitchtip_url = (source_env.get("GLITCHTIP_BASE_URL") or "https://glitchtip.prgs.cc").strip()
    glitchtip_org = (source_env.get("GLITCHTIP_ORG") or "").strip()
    glitchtip_proj = (source_env.get("GLITCHTIP_PROJECT") or "").strip()
    glitchtip_token = (source_env.get("GLITCHTIP_AUTH_TOKEN") or "").strip()

    has_token = bool(glitchtip_token)
    configured = bool(glitchtip_org and glitchtip_proj and has_token)
    status = "healthy" if configured else ("missing_token" if glitchtip_org and glitchtip_proj else "not_configured")

    return ProviderHealth(
        provider="glitchtip",
        base_url=glitchtip_url,
        org=glitchtip_org or "unconfigured",
        project=glitchtip_proj or "unconfigured",
        configured=configured,
        status=status,
        bridge_enabled=configured,
        lookback="24h",
        min_events_for_issue=2,
        self_hosted=True,
        environment=source_env.get("GLITCHTIP_ENVIRONMENT"),
        credentials_present=has_token,
    )


def _parse_pr_numbers(raw: Any) -> list[int]:
    if isinstance(raw, list):
        return [int(x) for x in raw if str(x).isdigit()]
    if isinstance(raw, str) and raw.strip():
        import json
        try:
            parsed = json.loads(raw)
            if isinstance(parsed, list):
                return [int(x) for x in parsed if str(x).isdigit()]
        except Exception:
            pass
    return []


def load_observability_snapshot(
    db: ControlPlaneDB | None = None,
    env: dict[str, str] | None = None,
) -> ObservabilitySnapshot:
    """Build a read-only snapshot of observability connection health and incident links."""
    sentry_health = load_provider_health("sentry", env)
    glitchtip_health = load_provider_health("glitchtip", env)
    providers = [sentry_health, glitchtip_health]

    target_db = db or ControlPlaneDB()
    raw_links = target_db.list_incident_links(limit=100)

    links: list[CorrelatedIncidentLink] = []
    sentry_cnt = 0
    glitchtip_cnt = 0

    for r in raw_links:
        prov = (r.get("provider") or "sentry").lower()
        if prov == "sentry":
            sentry_cnt += 1
        elif prov == "glitchtip":
            glitchtip_cnt += 1

        pr_nums = _parse_pr_numbers(r.get("linked_pr_numbers"))

        links.append(
            CorrelatedIncidentLink(
                link_id=int(r.get("link_id", 0)),
                provider=prov,
                provider_base_url=r.get("provider_base_url") or "",
                provider_org=r.get("provider_org") or "",
                provider_project=r.get("provider_project") or "",
                provider_issue_id=str(r.get("provider_issue_id") or ""),
                provider_short_id=r.get("provider_short_id"),
                provider_permalink=r.get("provider_permalink"),
                fingerprint=r.get("fingerprint"),
                gitea_org=r.get("gitea_org") or "Scaled-Tech-Consulting",
                gitea_repo=r.get("gitea_repo") or "Gitea-Tools",
                gitea_issue_number=int(r.get("gitea_issue_number", 0)),
                linked_pr_numbers=pr_nums,
                last_seen=r.get("last_seen"),
                event_count=int(r.get("event_count", 1)),
                created_at=r.get("created_at"),
                updated_at=r.get("updated_at"),
            )
        )

    bridge_active = any(p.bridge_enabled for p in providers)

    return ObservabilitySnapshot(
        schema_version=OBSERVABILITY_SCHEMA_VERSION,
        providers=providers,
        links=links,
        total_links=len(links),
        sentry_links_count=sentry_cnt,
        glitchtip_links_count=glitchtip_cnt,
        bridge_active=bridge_active,
    )


def snapshot_to_dict(snapshot: ObservabilitySnapshot) -> dict[str, Any]:
    return snapshot.to_dict()