"""Pydantic schemas for session suggested fixes (Phase 3).

See FLOWPILOT-MIGRATION.md Section 5.2.
"""
from __future__ import annotations

from datetime import datetime
from typing import Any, Literal
from uuid import UUID

from pydantic import BaseModel, Field

UserDecision = Literal["one_off", "draft_template", "build_template", "dismissed"]


class SessionSuggestedFixResponse(BaseModel):
    id: UUID
    session_id: UUID
    title: str
    description: str
    confidence_pct: int
    script_template_id: UUID | None
    ai_drafted_script: str | None
    ai_drafted_parameters: dict[str, Any] | None
    user_decision: UserDecision | None
    superseded_at: datetime | None
    created_at: datetime

    model_config = {"from_attributes": True}


class SessionSuggestedFixDecisionRequest(BaseModel):
    """Engineer's path choice on a suggested fix.

    Server-side side effects per Section 5.2:
    - one_off: render the script (Phase 5), no template created.
    - draft_template: render + queue a draft_templates row (Phase 5/6).
    - build_template: redirect to full template creation (Phase 5).
    - dismissed: mark the fix superseded so a fresh suggestion can take over.
    """
    decision: UserDecision


class SessionSuggestedFixDecisionResponse(BaseModel):
    """Returned after recording a decision; richer payloads land in Phase 5."""
    id: UUID
    user_decision: UserDecision
    # Set when the decision triggered side effects (e.g. a script generation).
    # Phase 3 only records the choice; this stays None until Phase 5 wires it.
    rendered_script: str | None = None
    redirect_path: str | None = Field(
        None,
        description="Where to send the engineer next (e.g. /scripts/builder?... for build_template)",
    )


# ── Resolution note preview ────────────────────────────────────────────────

class ResolutionNotePreviewResponse(BaseModel):
    markdown: str
    target_ticket_ref: str | None
    state_version: int
    from_cache: bool


# ── Phase 4: Resolve + Escalate post ───────────────────────────────────────

class ResolutionNotePostRequest(BaseModel):
    """Engineer-edited resolution markdown. Server posts to PSA + marks resolved."""
    markdown: str = Field(..., min_length=1, max_length=20_000)
    # Optional override for resolution summary shown on the session listing;
    # defaults to the first line of the markdown if omitted.
    resolution_summary: str | None = Field(None, max_length=500)


class EscalationPackagePostRequest(BaseModel):
    markdown: str = Field(..., min_length=1, max_length=20_000)
    # Free-text reason shown in session listings and escalation queue.
    escalation_reason: str | None = Field(None, max_length=500)


class ResolutionPostResponse(BaseModel):
    """Response shape for both Resolve/Escalate POST endpoints."""
    # "resolved" / "escalated" / "resolved_local" / "escalated_local"
    # The _local variants indicate the session has no linked PSA ticket —
    # markdown is stored, session state is updated, nothing was posted externally.
    outcome: str
    session_status: str
    external_id: str | None = None
    posted_at: datetime | None = None
    # Populated when a status transition was attempted and verified. None
    # when no target status is configured in account_settings.preferences.
    verified_status_id: int | None = None
    verified_status_name: str | None = None
    status_transition_skipped_reason: str | None = None