"""pydantic v2 response models for the my-deepagent HTTP API.

These shapes are stable contracts the Web GUI depends on. Internal ORM models
in `my_deepagent.persistence.models` are NOT exposed directly; routes convert
ORM rows into these DTOs.
"""

from __future__ import annotations

from pydantic import BaseModel, ConfigDict, Field


class _Strict(BaseModel):
    """Base for API DTOs — extra=forbid to catch typos at deserialization time."""

    model_config = ConfigDict(extra="forbid", frozen=True)


# ---------------------------------------------------------------------------
# /api/runs
# ---------------------------------------------------------------------------


class RunSummary(_Strict):
    id: str
    state: str
    repo_path: str
    base_branch: str
    worktree_root: str
    created_at: str
    ended_at: str | None = None
    final_report_path: str | None = None


class PhaseInfo(_Strict):
    id: str
    phase_key: str
    seq: int
    state: str
    attempts: int
    started_at: str | None = None
    ended_at: str | None = None


class ArtifactInfo(_Strict):
    id: str
    phase_id: str
    schema_id: str
    path: str
    valid: bool
    created_at: str


class EventInfo(_Strict):
    seq: int
    phase_id: str | None = None
    type: str
    ts: str
    payload: dict[str, object] | None = None


class RunDetail(_Strict):
    run: RunSummary
    phases: list[PhaseInfo]
    artifacts: list[ArtifactInfo]
    events: list[EventInfo]


# ---------------------------------------------------------------------------
# /api/runs POST body
# ---------------------------------------------------------------------------


class StartRunRequest(BaseModel):
    """User-submitted body for POST /api/runs (NOT frozen — input not response)."""

    model_config = ConfigDict(extra="forbid")
    template_path: str = Field(min_length=1)
    repo_path: str = Field(min_length=1)
    base_branch: str = "main"
    requirements_md: str = ""
    override: dict[str, str] | None = None


class StartRunResponse(_Strict):
    run_id: str
    state: str
    message: str = "started"


# ---------------------------------------------------------------------------
# /api/personas
# ---------------------------------------------------------------------------


class PersonaSummary(_Strict):
    name: str
    version: int
    description: str | None = None
    model: str
    capabilities: list[str]
    max_risk_level: str


# ---------------------------------------------------------------------------
# /api/workflows
# ---------------------------------------------------------------------------


class WorkflowRoleSummary(_Strict):
    id: str
    required_capabilities: list[str]


class WorkflowPhaseSummary(_Strict):
    key: str
    title: str
    risk: str
    role: str


class WorkflowSummary(_Strict):
    path: str  # relative path under docs/schemas/workflows/
    name: str
    version: int
    description: str | None = None
    roles: list[WorkflowRoleSummary]
    phases: list[WorkflowPhaseSummary]


# v0.4 — workflow generator UI (POST /api/workflows)


class WorkflowRoleSpec(_Strict):
    """Input shape for one role inside a CreateWorkflowRequest."""

    id: str = Field(min_length=1, pattern=r"^[a-z][a-z0-9_]*$")
    required_capabilities: list[str] = Field(min_length=1)
    preferred_backends: list[str] = Field(default_factory=list)
    fallback_personas: list[str] = Field(default_factory=list)


class WorkflowArtifactSpec(_Strict):
    """Input shape for one phase's expected_artifact (optional)."""

    path: str = Field(min_length=1)
    # YAML key is `schema`; pydantic attribute aliased to avoid BaseModel.schema clash
    schema_id: str = Field(min_length=1, alias="schema")


class WorkflowPhaseSpec(_Strict):
    """Input shape for one phase inside a CreateWorkflowRequest."""

    key: str = Field(min_length=1, pattern=r"^[a-z][a-z0-9_]*$")
    title: str = Field(min_length=1)
    risk: str = Field(min_length=1)  # low|medium|high — validated by WorkflowTemplate
    role: str = Field(min_length=1)
    instructions: str = Field(min_length=10)
    expected_artifact: WorkflowArtifactSpec | None = None
    gates: list[str] = Field(default_factory=list)
    timeout_seconds: int | None = Field(default=None, ge=1)
    max_budget_usd: float | None = Field(default=None, ge=0)


class CreateWorkflowRequest(_Strict):
    """Body for POST /api/workflows — saves a new template YAML on disk."""

    name: str = Field(min_length=1)
    version: int = Field(ge=1)
    description: str | None = None
    roles: list[WorkflowRoleSpec] = Field(min_length=1)
    phases: list[WorkflowPhaseSpec] = Field(min_length=1)
    default_gates: list[str] = Field(default_factory=list)
    max_total_budget_usd: float | None = Field(default=None, ge=0)


class CreateWorkflowResponse(_Strict):
    """Returned by POST /api/workflows."""

    path: str  # absolute path of the saved YAML
    name: str
    version: int


# ---------------------------------------------------------------------------
# /api/budget
# ---------------------------------------------------------------------------


class BudgetScopeEntry(_Strict):
    scope: str
    spent_usd: float
    cap_usd: float | None
    warn_usd: float | None = None


class BudgetSummary(_Strict):
    day: BudgetScopeEntry | None
    runs: list[BudgetScopeEntry]
    personas: list[BudgetScopeEntry]


# ---------------------------------------------------------------------------
# /api/sessions  (v0.3 PR #1)
# ---------------------------------------------------------------------------


class SessionSummary(_Strict):
    id: str
    state: str
    persona_id: str
    model: str | None
    title: str | None
    started_at: str | None
    last_message_at: str | None
    ended_at: str | None
    total_input_tokens: int
    total_output_tokens: int
    parent_session_id: str | None
    depth: int


class MessageInfo(_Strict):
    seq: int
    role: str
    content: str
    tool_calls: dict[str, object] | None = None
    token_count: int
    is_summary: bool
    archived: bool
    ts: str


class SessionDetail(_Strict):
    session: SessionSummary
    messages: list[MessageInfo]


class CreateSessionRequest(BaseModel):
    """POST /api/sessions body."""

    model_config = ConfigDict(extra="forbid")
    persona_name: str | None = Field(default=None, min_length=1)
    model_override: str | None = Field(default=None, min_length=1)
    repo_path: str = Field(default=".", min_length=1)


class PostMessageRequest(BaseModel):
    """POST /api/sessions/{id}/messages body."""

    model_config = ConfigDict(extra="forbid")
    content: str = Field(min_length=1)


class SessionAck(_Strict):
    session_id: str
    state: str
    message: str = "ok"