"""
Configuration module for AI Agent system.
"""
import os
from dataclasses import dataclass
from pathlib import Path
from typing import Optional


@dataclass
class AgentConfig:
    """Configuration for AI agent execution."""
    
    # Project paths
    project_root: Path
    component: str  # 'web_v2', 'backend', 'common'
    
    # Agent limits
    max_iterations: int = 10
    max_retries: int = 5
    timeout_hours: int = 6
    
    # Cursor CLI settings
    cursor_api_key: Optional[str] = None
    cursor_model: str = "claude-3-5-sonnet-20241022"
    
    # State file paths
    @property
    def agent_dir(self) -> Path:
        return self.project_root / "ai_docs" / "agent" / self.component
    
    @property
    def task_list_path(self) -> Path:
        return self.agent_dir / "task_list.json"
    
    @property
    def agent_state_path(self) -> Path:
        return self.agent_dir / "agent_state.json"
    
    @property
    def global_lock_path(self) -> Path:
        return self.project_root / "ai_docs" / "agent" / "global_lock.json"
    
    @property
    def prompts_dir(self) -> Path:
        return self.project_root / "ai_docs" / "agent" / "prompts"
    
    @property
    def component_root(self) -> Path:
        """Root directory of the component being worked on."""
        if self.component == "web_v2":
            return self.project_root / "mnemo_cards_web_v2"
        elif self.component == "backend":
            return self.project_root / "mnemo_cards_backend"
        elif self.component == "common":
            return self.project_root / "mnemo_cards_common"
        else:
            raise ValueError(f"Unknown component: {self.component}")
    
    @classmethod
    def from_env(cls, component: str) -> "AgentConfig":
        """Create configuration from environment variables."""
        project_root = Path(os.getenv("PROJECT_ROOT", os.getcwd()))
        
        return cls(
            project_root=project_root,
            component=component,
            max_iterations=int(os.getenv("MAX_ITERATIONS", "10")),
            max_retries=int(os.getenv("MAX_RETRIES", "3")),
            timeout_hours=int(os.getenv("TIMEOUT_HOURS", "6")),
            cursor_api_key=os.getenv("CURSOR_API_KEY"),
            cursor_model=os.getenv("CURSOR_MODEL", "claude-3-5-sonnet-20241022"),
        )
    
    def validate(self) -> None:
        """Validate configuration."""
        if not self.project_root.exists():
            raise ValueError(f"Project root does not exist: {self.project_root}")
        
        if not self.cursor_api_key:
            raise ValueError("CURSOR_API_KEY environment variable is required")
        
        if self.component not in ["web_v2", "backend", "common"]:
            raise ValueError(f"Invalid component: {self.component}")
        
        if not self.component_root.exists():
            raise ValueError(f"Component root does not exist: {self.component_root}")


# Component-specific configurations
COMPONENT_CONFIGS = {
    "web_v2": {
        "test_command": "cd mnemo_cards_web_v2 && flutter test",
        "lint_command": "cd mnemo_cards_web_v2 && flutter analyze",
        "build_command": "cd mnemo_cards_web_v2 && flutter build web",
    },
    "backend": {
        "test_command": "cd mnemo_cards_backend && dart test",
        "lint_command": "cd mnemo_cards_backend && dart analyze",
        "build_command": "cd mnemo_cards_backend && dart compile exe bin/server.dart",
    },
    "common": {
        "test_command": "cd mnemo_cards_common && dart test",
        "lint_command": "cd mnemo_cards_common && dart analyze",
        "build_command": None,  # No build for common package
    },
}


def get_test_command(component: str) -> str:
    """Get test command for component."""
    return COMPONENT_CONFIGS[component]["test_command"]


def get_lint_command(component: str) -> str:
    """Get lint command for component."""
    return COMPONENT_CONFIGS[component]["lint_command"]


def get_build_command(component: str) -> Optional[str]:
    """Get build command for component."""
    return COMPONENT_CONFIGS[component]["build_command"]