"""Status, releases, staging, and manual trigger endpoints.

GET  /status              — health check
GET  /releases/{repo}     — list release versions for a repo
GET  /staging             — current staging release for a repo
POST /manual/pr/{pr_id}   — manually trigger PR processing
POST /manual/release      — manually trigger a release run
"""

import asyncio
import uuid
from datetime import datetime, timezone

from fastapi import APIRouter, Depends, Request, status
from fastapi.responses import JSONResponse

from release_agent.api.dependencies import (
    get_db_pool,
    get_graphs,
    get_staging_store,
    get_tool_clients,
    require_operator_token,
)
from release_agent.api.models import (
    HealthResponse,
    ManualReleaseRequest,
    ManualTriggerResponse,
    ReleaseVersionListResponse,
    StagingResponse,
)

router = APIRouter()

_VERSION = "0.1.0"


# ---------------------------------------------------------------------------
# GET /status
# ---------------------------------------------------------------------------

@router.get("/status")
async def get_status(request: Request) -> HealthResponse:
    """Return the health status of the agent service."""
    started_at: datetime = request.app.state.started_at
    uptime = (datetime.now(tz=timezone.utc) - started_at).total_seconds()
    return HealthResponse(
        status="ok",
        version=_VERSION,
        uptime_seconds=uptime,
    )


# ---------------------------------------------------------------------------
# GET /releases/{repo}
# ---------------------------------------------------------------------------

@router.get("/releases/{repo}")
async def list_release_versions(
    repo: str,
    staging_store=Depends(get_staging_store),
) -> ReleaseVersionListResponse:
    """List all known release versions for the given repository."""
    versions = await staging_store.list_versions(repo)
    return ReleaseVersionListResponse(repo=repo, versions=versions)


# ---------------------------------------------------------------------------
# GET /staging
# ---------------------------------------------------------------------------

@router.get("/staging")
async def get_staging(
    repo: str,
    staging_store=Depends(get_staging_store),
) -> StagingResponse:
    """Return the current staging release for the given repository."""
    staging_obj = await staging_store.load(repo)
    staging_dict = staging_obj.model_dump(mode="json") if staging_obj is not None else None
    return StagingResponse(repo=repo, staging=staging_dict)


# ---------------------------------------------------------------------------
# POST /manual/pr/{pr_id}
# ---------------------------------------------------------------------------

@router.post("/manual/pr/{pr_id}", status_code=status.HTTP_202_ACCEPTED)
async def manual_pr_trigger(
    pr_id: str,
    request: Request,
    graphs=Depends(get_graphs),
    tool_clients=Depends(get_tool_clients),
    db_pool=Depends(get_db_pool),
    _auth: None = Depends(require_operator_token),
) -> ManualTriggerResponse:
    """Manually trigger PR processing for the given PR ID.

    Fetches PR details from AzDo first to build a proper initial state
    including the synthesized webhook payload.
    """
    from release_agent.api.webhooks import _run_graph

    settings = request.app.state.settings
    thread_id = str(uuid.uuid4())

    # Fetch PR info to build webhook-compatible initial state
    try:
        pr_info = await tool_clients.azdo.get_pr(int(pr_id))
        initial_state = {
            "webhook_payload": {
                "event_type": "git.pullrequest.updated",
                "subscription_id": f"manual-{pr_id}",
                "resource": {
                    "pull_request_id": int(pr_id),
                    "title": pr_info.pr_title,
                    "status": pr_info.pr_status,
                    "source_ref_name": pr_info.branch,
                    "target_ref_name": "refs/heads/develop",
                    "closed_date": None,
                    "repository": {
                        "id": f"{pr_info.repo_name}-id",
                        "name": pr_info.repo_name,
                        "web_url": f"https://dev.azure.com/billodev/Billo%20App%20Platform/_git/{pr_info.repo_name}",
                    },
                },
            },
            "pr_id": pr_id,
            "repo_name": pr_info.repo_name,
        }
    except Exception:
        # Fallback: minimal state, let parse_webhook handle errors
        initial_state = {"pr_id": pr_id}

    task = asyncio.create_task(
        _run_graph(
            graph=graphs["pr_completed"],
            initial_state=initial_state,
            thread_id=thread_id,
            tool_clients=tool_clients,
            db_pool=db_pool,
            repos_base_dir=settings.repos_base_dir,
            graph_name="pr_completed",
            default_jira_project=settings.default_jira_project,
        )
    )
    request.app.state.background_tasks.add(task)
    task.add_done_callback(request.app.state.background_tasks.discard)

    return ManualTriggerResponse(
        thread_id=thread_id,
        message=f"PR {pr_id} processing scheduled as thread {thread_id}",
    )


# ---------------------------------------------------------------------------
# POST /manual/release
# ---------------------------------------------------------------------------

@router.post("/manual/release", status_code=status.HTTP_202_ACCEPTED)
async def manual_release_trigger(
    body: ManualReleaseRequest,
    request: Request,
    graphs=Depends(get_graphs),
    tool_clients=Depends(get_tool_clients),
    db_pool=Depends(get_db_pool),
    _auth: None = Depends(require_operator_token),
) -> ManualTriggerResponse:
    """Manually trigger a release run for the given repository."""
    from release_agent.api.webhooks import _run_graph

    thread_id = str(uuid.uuid4())
    initial_state = {"repo_name": body.repo}

    task = asyncio.create_task(
        _run_graph(
            graph=graphs["release"],
            initial_state=initial_state,
            thread_id=thread_id,
            tool_clients=tool_clients,
            db_pool=db_pool,
        )
    )
    request.app.state.background_tasks.add(task)
    task.add_done_callback(request.app.state.background_tasks.discard)

    return ManualTriggerResponse(
        thread_id=thread_id,
        message=f"Release for repo '{body.repo}' scheduled as thread {thread_id}",
    )