"""
Pydantic schemas for API request/response models.
"""

from datetime import datetime
from typing import Optional, List, Dict, Any, Union
from pydantic import BaseModel, Field


# Base schemas
class TimestampMixin(BaseModel):
    """Mixin for timestamp fields."""
    created_at: datetime
    updated_at: datetime


# Session schemas
class SessionStartRequest(BaseModel):
    """Request schema for starting a session."""
    session_type: str = Field(..., description="Type of session: startup, resume, or clear")
    working_directory: str = Field(..., description="Current working directory")
    git_branch: Optional[str] = Field(None, description="Current git branch")
    git_repo: Optional[str] = Field(None, description="Git repository URL")
    environment: Optional[Dict[str, Any]] = Field(None, description="Environment variables and context")


class SessionEndRequest(BaseModel):
    """Request schema for ending a session."""
    session_id: int = Field(..., description="ID of the session to end")
    end_reason: str = Field(default="normal", description="Reason for ending: normal, interrupted, or timeout")


class SessionResponse(BaseModel):
    """Response schema for session operations."""
    session_id: int
    project_id: int
    status: str
    message: Optional[str] = None
    
    class Config:
        from_attributes = True


# Conversation schemas
class ConversationRequest(BaseModel):
    """Request schema for logging conversations."""
    session_id: int = Field(..., description="Associated session ID")
    timestamp: datetime = Field(default_factory=datetime.utcnow, description="When the exchange occurred")
    user_prompt: Optional[str] = Field(None, description="User's input message")
    claude_response: Optional[str] = Field(None, description="Claude's response")
    tools_used: Optional[List[str]] = Field(None, description="Tools used in the response")
    files_affected: Optional[List[str]] = Field(None, description="Files mentioned or modified")
    context: Optional[Dict[str, Any]] = Field(None, description="Additional context")
    tokens_input: Optional[int] = Field(None, description="Estimated input token count")
    tokens_output: Optional[int] = Field(None, description="Estimated output token count")
    exchange_type: str = Field(..., description="Type of exchange: user_prompt or claude_response")


class ConversationResponse(BaseModel):
    """Response schema for conversation operations."""
    id: int
    session_id: int
    timestamp: datetime
    exchange_type: str
    content_length: int
    
    class Config:
        from_attributes = True


# Activity schemas
class ActivityRequest(BaseModel):
    """Request schema for recording activities."""
    session_id: int = Field(..., description="Associated session ID")
    conversation_id: Optional[int] = Field(None, description="Associated conversation ID")
    timestamp: datetime = Field(default_factory=datetime.utcnow, description="When the activity occurred")
    tool_name: str = Field(..., description="Name of the tool used")
    action: str = Field(..., description="Specific action taken")
    file_path: Optional[str] = Field(None, description="Target file path if applicable")
    metadata: Optional[Dict[str, Any]] = Field(None, description="Tool-specific metadata")
    success: bool = Field(default=True, description="Whether the operation succeeded")
    error_message: Optional[str] = Field(None, description="Error details if failed")
    lines_added: Optional[int] = Field(None, description="Lines added for Edit/Write operations")
    lines_removed: Optional[int] = Field(None, description="Lines removed for Edit operations")


class ActivityResponse(BaseModel):
    """Response schema for activity operations."""
    id: int
    session_id: int
    tool_name: str
    action: str
    timestamp: datetime
    success: bool
    
    class Config:
        from_attributes = True


# Waiting period schemas
class WaitingStartRequest(BaseModel):
    """Request schema for starting a waiting period."""
    session_id: int = Field(..., description="Associated session ID")
    timestamp: datetime = Field(default_factory=datetime.utcnow, description="When waiting started")
    context_before: Optional[str] = Field(None, description="Context before waiting")


class WaitingEndRequest(BaseModel):
    """Request schema for ending a waiting period."""
    session_id: int = Field(..., description="Associated session ID")
    timestamp: datetime = Field(default_factory=datetime.utcnow, description="When waiting ended")
    duration_seconds: Optional[int] = Field(None, description="Total waiting duration")
    context_after: Optional[str] = Field(None, description="Context after waiting")


class WaitingPeriodResponse(BaseModel):
    """Response schema for waiting period operations."""
    id: int
    session_id: int
    start_time: datetime
    end_time: Optional[datetime]
    duration_seconds: Optional[int]
    engagement_score: float
    
    class Config:
        from_attributes = True


# Git operation schemas
class GitOperationRequest(BaseModel):
    """Request schema for git operations."""
    session_id: int = Field(..., description="Associated session ID")
    timestamp: datetime = Field(default_factory=datetime.utcnow, description="When the operation occurred")
    operation: str = Field(..., description="Type of git operation")
    command: str = Field(..., description="Full git command executed")
    result: Optional[str] = Field(None, description="Command output")
    success: bool = Field(default=True, description="Whether the command succeeded")
    files_changed: Optional[List[str]] = Field(None, description="Files affected by the operation")
    lines_added: Optional[int] = Field(None, description="Lines added")
    lines_removed: Optional[int] = Field(None, description="Lines removed")
    commit_hash: Optional[str] = Field(None, description="Git commit SHA")
    branch_from: Optional[str] = Field(None, description="Source branch")
    branch_to: Optional[str] = Field(None, description="Target branch")


class GitOperationResponse(BaseModel):
    """Response schema for git operations."""
    id: int
    session_id: int
    operation: str
    timestamp: datetime
    success: bool
    commit_hash: Optional[str]
    
    class Config:
        from_attributes = True


# Project schemas
class ProjectSummary(BaseModel):
    """Summary information about a project."""
    id: int
    name: str
    path: str
    git_repo: Optional[str]
    languages: Optional[List[str]]
    total_sessions: int
    total_time_minutes: int
    last_activity: Optional[datetime]
    files_modified_count: int
    lines_changed_count: int
    
    class Config:
        from_attributes = True


class TimelineEvent(BaseModel):
    """Individual event in project timeline."""
    timestamp: datetime
    type: str  # session_start, session_end, conversation, activity, git_operation
    data: Dict[str, Any]


class ProjectTimeline(BaseModel):
    """Project timeline with events."""
    project: ProjectSummary
    timeline: List[TimelineEvent]


# Analytics schemas
class ProductivityMetrics(BaseModel):
    """Productivity analytics response."""
    engagement_score: float = Field(..., description="Overall engagement level (0-100)")
    average_session_length: float = Field(..., description="Minutes per session")
    think_time_average: float = Field(..., description="Average waiting time between interactions")
    files_per_session: float = Field(..., description="Average files touched per session")
    tools_most_used: List[Dict[str, Union[str, int]]] = Field(..., description="Most frequently used tools")
    productivity_trends: List[Dict[str, Union[str, float]]] = Field(..., description="Daily productivity scores")


class ConversationSearchResult(BaseModel):
    """Search result for conversation search."""
    id: int
    project_name: str
    timestamp: datetime
    user_prompt: Optional[str]
    claude_response: Optional[str]
    relevance_score: float
    context: List[str]
    
    class Config:
        from_attributes = True


# Error schemas
class ErrorResponse(BaseModel):
    """Standard error response."""
    error: str
    message: str
    details: Optional[Dict[str, Any]] = None