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backend/src/models/report.py

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+# [DEF:backend.src.models.report:Module]
+# @TIER: CRITICAL
+# @SEMANTICS: reports, models, pydantic, normalization, pagination
+# @PURPOSE: Canonical report schemas for unified task reporting across heterogeneous task types.
+# @LAYER: Domain
+# @RELATION: DEPENDS_ON -> backend.src.core.task_manager.models
+# @INVARIANT: Canonical report fields are always present for every report item.
+
+# [SECTION: IMPORTS]
+from datetime import datetime
+from enum import Enum
+from typing import Any, Dict, List, Optional
+
+from pydantic import BaseModel, Field, field_validator, model_validator
+# [/SECTION]
+
+
+# [DEF:TaskType:Class]
+# @PURPOSE: Supported normalized task report types.
+class TaskType(str, Enum):
+    LLM_VERIFICATION = "llm_verification"
+    BACKUP = "backup"
+    MIGRATION = "migration"
+    DOCUMENTATION = "documentation"
+    UNKNOWN = "unknown"
+# [/DEF:TaskType:Class]
+
+
+# [DEF:ReportStatus:Class]
+# @PURPOSE: Supported normalized report status values.
+class ReportStatus(str, Enum):
+    SUCCESS = "success"
+    FAILED = "failed"
+    IN_PROGRESS = "in_progress"
+    PARTIAL = "partial"
+# [/DEF:ReportStatus:Class]
+
+
+# [DEF:ErrorContext:Class]
+# @PURPOSE: Error and recovery context for failed/partial reports.
+class ErrorContext(BaseModel):
+    code: Optional[str] = None
+    message: str
+    next_actions: List[str] = Field(default_factory=list)
+# [/DEF:ErrorContext:Class]
+
+
+# [DEF:TaskReport:Class]
+# @PURPOSE: Canonical normalized report envelope for one task execution.
+class TaskReport(BaseModel):
+    report_id: str
+    task_id: str
+    task_type: TaskType
+    status: ReportStatus
+    started_at: Optional[datetime] = None
+    updated_at: datetime
+    summary: str
+    details: Optional[Dict[str, Any]] = None
+    error_context: Optional[ErrorContext] = None
+    source_ref: Optional[Dict[str, Any]] = None
+
+    @field_validator("report_id", "task_id", "summary")
+    @classmethod
+    def _non_empty_str(cls, value: str) -> str:
+        if not isinstance(value, str) or not value.strip():
+            raise ValueError("Value must be a non-empty string")
+        return value.strip()
+# [/DEF:TaskReport:Class]
+
+
+# [DEF:ReportQuery:Class]
+# @PURPOSE: Query object for server-side report filtering, sorting, and pagination.
+class ReportQuery(BaseModel):
+    page: int = Field(default=1, ge=1)
+    page_size: int = Field(default=20, ge=1, le=100)
+    task_types: List[TaskType] = Field(default_factory=list)
+    statuses: List[ReportStatus] = Field(default_factory=list)
+    time_from: Optional[datetime] = None
+    time_to: Optional[datetime] = None
+    search: Optional[str] = Field(default=None, max_length=200)
+    sort_by: str = Field(default="updated_at")
+    sort_order: str = Field(default="desc")
+
+    @field_validator("sort_by")
+    @classmethod
+    def _validate_sort_by(cls, value: str) -> str:
+        allowed = {"updated_at", "status", "task_type"}
+        if value not in allowed:
+            raise ValueError(f"sort_by must be one of: {', '.join(sorted(allowed))}")
+        return value
+
+    @field_validator("sort_order")
+    @classmethod
+    def _validate_sort_order(cls, value: str) -> str:
+        if value not in {"asc", "desc"}:
+            raise ValueError("sort_order must be 'asc' or 'desc'")
+        return value
+
+    @model_validator(mode="after")
+    def _validate_time_range(self):
+        if self.time_from and self.time_to and self.time_from > self.time_to:
+            raise ValueError("time_from must be less than or equal to time_to")
+        return self
+# [/DEF:ReportQuery:Class]
+
+
+# [DEF:ReportCollection:Class]
+# @PURPOSE: Paginated collection of normalized task reports.
+class ReportCollection(BaseModel):
+    items: List[TaskReport]
+    total: int = Field(ge=0)
+    page: int = Field(ge=1)
+    page_size: int = Field(ge=1)
+    has_next: bool
+    applied_filters: ReportQuery
+# [/DEF:ReportCollection:Class]
+
+
+# [DEF:ReportDetailView:Class]
+# @PURPOSE: Detailed report representation including diagnostics and recovery actions.
+class ReportDetailView(BaseModel):
+    report: TaskReport
+    timeline: List[Dict[str, Any]] = Field(default_factory=list)
+    diagnostics: Optional[Dict[str, Any]] = None
+    next_actions: List[str] = Field(default_factory=list)
+# [/DEF:ReportDetailView:Class]
+
+# [/DEF:backend.src.models.report:Module]