"""Operational Actor API — AP1.7 (Vibe-Coder / Agenten)."""

from __future__ import annotations

from typing import Any, Literal, Optional

from data_layer.attention import get_next_action_candidates_for_initiative
from data_layer.initiative_snapshot import get_initiative_steering_snapshot
from fastapi import APIRouter, Depends, HTTPException, Query
from operational_auth import require_operational_capability
from pydantic import BaseModel, Field
from services import actions as action_service
from services import backlog as backlog_service
from services import blockers as blocker_service
from services import decisions as decision_service
from services import evidence as evidence_service
from services import recurring as recurring_service
from services.audit import log_audit
from tenant_context import TenantContext

router = APIRouter(prefix="/api/operational", tags=["operational"])


def _ok(ctx: TenantContext, data: Any) -> dict[str, Any]:
    return {
        "ok": True,
        "data": data,
        "actor_id": ctx.actor_id,
    }


class ActionStatusPatch(BaseModel):
    status: Literal[
        "open", "ready", "in_progress", "blocked", "review_required", "done", "discarded"
    ]
    note: Optional[str] = None


class ActionAssignmentsBody(BaseModel):
    actor_ids: list[str] = Field(default_factory=list)


class BlockerCreateBody(BaseModel):
    initiative_id: str
    title: str = Field(min_length=1, max_length=255)
    description: str = ""
    action_id: Optional[str] = None
    status: Literal["open", "in_progress"] = "open"


class BlockerPatchBody(BaseModel):
    status: Literal["open", "in_progress", "resolved", "accepted_risk", "dismissed"]


class EvidenceCreateBody(BaseModel):
    initiative_id: str
    title: str = Field(min_length=1, max_length=255)
    body: str = ""
    action_id: Optional[str] = None
    roadmap_item_id: Optional[str] = None
    status: Literal["submitted", "accepted", "rejected"] = "submitted"


class DecisionProposalBody(BaseModel):
    initiative_id: str
    title: str = Field(min_length=1, max_length=255)
    rationale: str = ""
    proposed_status: Literal["proposed"] = "proposed"


class BacklogProposalBody(BaseModel):
    initiative_id: str
    title: str = Field(min_length=1, max_length=255)
    description: str = ""
    roadmap_item_id: Optional[str] = None


class BacklogConvertBody(BaseModel):
    work_cycle_id: Optional[str] = None
    assign_active_sprint: bool = True
    assigned_actor_ids: list[str] = Field(default_factory=list)


class RecurringStatusPatch(BaseModel):
    status: Literal["active", "paused", "ended"]


class ActionWorkCyclePatch(BaseModel):
    work_cycle_id: Optional[str] = None
    clear_work_cycle: bool = False


@router.get("/me")
def operational_me(ctx: TenantContext = Depends(require_operational_capability("kairo.action.read"))):
    return _ok(
        ctx,
        {
            "auth_source": ctx.auth_source,
            "tenant_id": ctx.tenant_id,
            "tenant_slug": ctx.tenant_slug,
            "actor_id": ctx.actor_id,
            "actor_type": ctx.actor_type,
            "display_name": ctx.display_name,
            "capabilities": sorted(ctx.capabilities),
        },
    )


@router.get("/initiatives/{initiative_id}/context")
def operational_context(
    initiative_id: str,
    ctx: TenantContext = Depends(require_operational_capability("kairo.initiative.read")),
):
    snapshot = get_initiative_steering_snapshot(ctx, initiative_id=initiative_id)
    if not snapshot:
        raise HTTPException(status_code=404, detail="Vorhaben nicht gefunden")
    subset = {
        "initiative_id": snapshot.get("initiative_id"),
        "title": snapshot.get("initiative_title"),
        "status": snapshot.get("initiative_status"),
        "method_key": snapshot.get("method_key"),
        "method_label": snapshot.get("method_label"),
        "archetype_key": snapshot.get("archetype_key"),
        "archetype_label": snapshot.get("archetype_label"),
        "steering_guidance": snapshot.get("steering_guidance"),
        "lifecycle_state": snapshot.get("lifecycle_state"),
        "lifecycle_label": snapshot.get("lifecycle_label"),
        "signals": snapshot.get("signals"),
        "attention_items": snapshot.get("attention_items"),
        "next_actions": snapshot.get("next_actions"),
        "active_work_cycle": snapshot.get("active_work_cycle"),
    }
    return _ok(ctx, subset)


@router.get("/next-action")
def operational_next_action(
    initiative_id: str = Query(...),
    limit: int = Query(default=5, ge=1, le=20),
    ctx: TenantContext = Depends(require_operational_capability("kairo.initiative.read")),
):
    items = get_next_action_candidates_for_initiative(
        ctx, initiative_id=initiative_id, limit=limit
    )
    return _ok(ctx, items)


@router.get("/actions/{action_id}")
def operational_get_action(
    action_id: str,
    ctx: TenantContext = Depends(require_operational_capability("kairo.action.read")),
):
    item = action_service.get_action(tenant_id=ctx.tenant_id, action_id=action_id)
    if not item:
        raise HTTPException(status_code=404, detail="Arbeitspaket nicht gefunden")
    return _ok(ctx, item)


@router.patch("/actions/{action_id}/status")
def operational_patch_action_status(
    action_id: str,
    body: ActionStatusPatch,
    ctx: TenantContext = Depends(require_operational_capability("kairo.action.manage")),
):
    description = None
    if body.note:
        description = body.note.strip()
    try:
        item = action_service.update_action(
            tenant_id=ctx.tenant_id,
            action_id=action_id,
            user_id=ctx.user_id or None,
            status=body.status,
            description=description,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    if not item:
        raise HTTPException(status_code=404, detail="Arbeitspaket nicht gefunden")

    log_audit(
        "operational.action.status",
        user_id=ctx.user_id or None,
        tenant_id=ctx.tenant_id,
        details={
            "action_id": action_id,
            "status": body.status,
            "actor_id": ctx.actor_id,
            "auth_source": ctx.auth_source,
        },
    )
    return _ok(ctx, item)


@router.post("/actions/{action_id}/assignments")
def operational_set_assignments(
    action_id: str,
    body: ActionAssignmentsBody,
    ctx: TenantContext = Depends(require_operational_capability("kairo.action.manage")),
):
    try:
        item = action_service.set_action_assignments(
            tenant_id=ctx.tenant_id,
            action_id=action_id,
            actor_ids=body.actor_ids,
            user_id=ctx.user_id or None,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    if not item:
        raise HTTPException(status_code=404, detail="Arbeitspaket nicht gefunden")
    return _ok(ctx, item)


@router.post("/blockers", status_code=201)
def operational_create_blocker(
    body: BlockerCreateBody,
    ctx: TenantContext = Depends(require_operational_capability("kairo.blocker.manage")),
):
    try:
        item = blocker_service.create_blocker(
            tenant_id=ctx.tenant_id,
            initiative_id=body.initiative_id,
            title=body.title,
            description=body.description,
            status=body.status,
            action_id=body.action_id,
            reported_by_actor_id=ctx.actor_id,
            user_id=ctx.user_id or None,
        )
    except ValueError as exc:
        detail = str(exc)
        if detail == "Initiative nicht gefunden":
            raise HTTPException(status_code=404, detail=detail) from exc
        raise HTTPException(status_code=400, detail=detail) from exc
    return _ok(ctx, item)


@router.patch("/blockers/{blocker_id}")
def operational_patch_blocker(
    blocker_id: str,
    body: BlockerPatchBody,
    ctx: TenantContext = Depends(require_operational_capability("kairo.blocker.manage")),
):
    try:
        item = blocker_service.update_blocker(
            tenant_id=ctx.tenant_id,
            blocker_id=blocker_id,
            user_id=ctx.user_id or None,
            status=body.status,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    if not item:
        raise HTTPException(status_code=404, detail="Blocker nicht gefunden")
    return _ok(ctx, item)


@router.post("/evidence", status_code=201)
def operational_create_evidence(
    body: EvidenceCreateBody,
    ctx: TenantContext = Depends(require_operational_capability("kairo.evidence.manage")),
):
    try:
        item = evidence_service.create_evidence(
            tenant_id=ctx.tenant_id,
            initiative_id=body.initiative_id,
            title=body.title,
            description=body.body,
            status=body.status,
            action_id=body.action_id,
            roadmap_item_id=body.roadmap_item_id,
            submitted_by_actor_id=ctx.actor_id,
            user_id=ctx.user_id or None,
        )
    except ValueError as exc:
        detail = str(exc)
        if detail == "Initiative nicht gefunden":
            raise HTTPException(status_code=404, detail=detail) from exc
        raise HTTPException(status_code=400, detail=detail) from exc
    return _ok(ctx, item)


@router.post("/decisions/proposals", status_code=201)
def operational_decision_proposal(
    body: DecisionProposalBody,
    ctx: TenantContext = Depends(require_operational_capability("kairo.decision.manage")),
):
    try:
        item = decision_service.create_decision(
            tenant_id=ctx.tenant_id,
            initiative_id=body.initiative_id,
            title=body.title,
            description=body.rationale,
            status=body.proposed_status,
            decided_by_actor_id=ctx.actor_id,
            user_id=ctx.user_id or None,
        )
    except ValueError as exc:
        detail = str(exc)
        if detail == "Initiative nicht gefunden":
            raise HTTPException(status_code=404, detail=detail) from exc
        raise HTTPException(status_code=400, detail=detail) from exc
    return _ok(ctx, item)


@router.post("/backlog/proposals", status_code=201)
def operational_backlog_proposal(
    body: BacklogProposalBody,
    ctx: TenantContext = Depends(require_operational_capability("kairo.backlog.manage")),
):
    try:
        item = backlog_service.create_backlog_item(
            tenant_id=ctx.tenant_id,
            initiative_id=body.initiative_id,
            title=body.title,
            description=body.description,
            status="new",
            roadmap_item_id=body.roadmap_item_id,
            user_id=ctx.user_id or None,
        )
    except ValueError as exc:
        detail = str(exc)
        if detail == "Initiative nicht gefunden":
            raise HTTPException(status_code=404, detail=detail) from exc
        raise HTTPException(status_code=400, detail=detail) from exc
    return _ok(ctx, item)


@router.post("/backlog/{backlog_item_id}/convert-to-action", status_code=201)
def operational_convert_backlog(
    backlog_item_id: str,
    body: BacklogConvertBody,
    ctx: TenantContext = Depends(require_operational_capability("kairo.backlog.manage")),
):
    assigned = body.assigned_actor_ids
    if not assigned and ctx.actor_id:
        assigned = [ctx.actor_id]
    try:
        result = backlog_service.convert_backlog_to_action(
            tenant_id=ctx.tenant_id,
            backlog_item_id=backlog_item_id,
            user_id=ctx.user_id or None,
            assigned_actor_ids=assigned,
            work_cycle_id=body.work_cycle_id,
            assign_active_sprint=body.assign_active_sprint,
        )
    except ValueError as exc:
        detail = str(exc)
        if detail == "Backlog-Item nicht gefunden":
            raise HTTPException(status_code=404, detail=detail) from exc
        raise HTTPException(status_code=400, detail=detail) from exc

    log_audit(
        "operational.backlog.convert",
        user_id=ctx.user_id or None,
        tenant_id=ctx.tenant_id,
        details={
            "backlog_item_id": backlog_item_id,
            "action_id": result.get("action", {}).get("id"),
            "work_cycle_id": body.work_cycle_id,
            "actor_id": ctx.actor_id,
        },
    )
    return _ok(ctx, result)


@router.patch("/recurring/{recurring_id}")
def operational_patch_recurring(
    recurring_id: str,
    body: RecurringStatusPatch,
    ctx: TenantContext = Depends(require_operational_capability("kairo.recurring.manage")),
):
    try:
        item = recurring_service.update_recurring_element(
            tenant_id=ctx.tenant_id,
            recurring_id=recurring_id,
            user_id=ctx.user_id or None,
            status=body.status,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    if not item:
        raise HTTPException(status_code=404, detail="Recurring-Element nicht gefunden")

    log_audit(
        "operational.recurring.status",
        user_id=ctx.user_id or None,
        tenant_id=ctx.tenant_id,
        details={
            "recurring_id": recurring_id,
            "status": body.status,
            "actor_id": ctx.actor_id,
        },
    )
    return _ok(ctx, item)


@router.patch("/actions/{action_id}/work-cycle")
def operational_patch_action_work_cycle(
    action_id: str,
    body: ActionWorkCyclePatch,
    ctx: TenantContext = Depends(require_operational_capability("kairo.action.manage")),
):
    try:
        item = action_service.update_action(
            tenant_id=ctx.tenant_id,
            action_id=action_id,
            user_id=ctx.user_id or None,
            work_cycle_id=body.work_cycle_id,
            clear_work_cycle=body.clear_work_cycle,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    if not item:
        raise HTTPException(status_code=404, detail="Arbeitspaket nicht gefunden")

    log_audit(
        "operational.action.work_cycle",
        user_id=ctx.user_id or None,
        tenant_id=ctx.tenant_id,
        details={
            "action_id": action_id,
            "work_cycle_id": body.work_cycle_id,
            "clear_work_cycle": body.clear_work_cycle,
            "actor_id": ctx.actor_id,
        },
    )
    return _ok(ctx, item)