"""
ProcessingJob data model: Batch configuration and execution tracking.

Represents a voice extraction job with configuration and state.
"""

from dataclasses import dataclass, field
from datetime import datetime
from enum import Enum
from typing import List, Literal, Optional


class ExtractionMode(Enum):
    """Extraction mode for audio processing."""

    SPEECH = "speech"
    NONVERBAL = "nonverbal"
    BOTH = "both"


class JobStatus(Enum):
    """Processing job status."""

    PENDING = "pending"
    RUNNING = "running"
    COMPLETED = "completed"
    FAILED = "failed"
    CANCELLED = "cancelled"


@dataclass
class ProcessingJob:
    """
    Voice extraction processing job.

    Represents a batch processing job with configuration, state tracking,
    and results collection.
    """

    # Input configuration
    reference_file: str
    input_files: List[str]
    output_dir: str

    # Processing options
    extraction_mode: ExtractionMode = ExtractionMode.SPEECH
    apply_denoising: bool = False
    vad_threshold: float = 0.5
    quality_threshold_enabled: bool = True

    # Job state
    status: JobStatus = JobStatus.PENDING
    job_id: Optional[str] = None
    created_at: Optional[str] = None
    started_at: Optional[str] = None
    completed_at: Optional[str] = None

    # Progress tracking
    total_files: int = 0
    files_processed: int = 0
    files_failed: int = 0
    current_file: Optional[str] = None

    # Results
    output_files: List[str] = field(default_factory=list)
    failed_files: List[dict] = field(default_factory=list)  # {file, error}

    # Statistics
    total_input_duration: float = 0.0
    total_extracted_duration: float = 0.0
    total_processing_time: float = 0.0

    def __post_init__(self):
        """Initialize job after creation."""
        if self.job_id is None:
            # Generate job ID from timestamp
            timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
            self.job_id = f"job_{timestamp}"

        if self.created_at is None:
            self.created_at = datetime.now().isoformat()

        self.total_files = len(self.input_files)

    @property
    def progress_percentage(self) -> float:
        """
        Get job progress as percentage.

        Returns:
            Progress percentage (0-100)
        """
        if self.total_files == 0:
            return 0.0

        return (self.files_processed / self.total_files) * 100

    @property
    def success_rate(self) -> float:
        """
        Get success rate for processed files.

        Returns:
            Success rate as percentage (0-100)
        """
        processed = self.files_processed
        if processed == 0:
            return 0.0

        succeeded = processed - self.files_failed
        return (succeeded / processed) * 100

    @property
    def extraction_yield(self) -> float:
        """
        Get extraction yield percentage.

        Returns:
            Yield as percentage of input duration (0-100)
        """
        if self.total_input_duration == 0:
            return 0.0

        return (self.total_extracted_duration / self.total_input_duration) * 100

    @property
    def is_complete(self) -> bool:
        """Check if job is complete."""
        return self.status in (JobStatus.COMPLETED, JobStatus.FAILED, JobStatus.CANCELLED)

    @property
    def is_running(self) -> bool:
        """Check if job is currently running."""
        return self.status == JobStatus.RUNNING

    def start(self):
        """Mark job as started."""
        self.status = JobStatus.RUNNING
        self.started_at = datetime.now().isoformat()

    def complete(self):
        """Mark job as completed."""
        self.status = JobStatus.COMPLETED
        self.completed_at = datetime.now().isoformat()

        # Calculate total processing time
        if self.started_at and self.completed_at:
            start = datetime.fromisoformat(self.started_at)
            end = datetime.fromisoformat(self.completed_at)
            self.total_processing_time = (end - start).total_seconds()

    def fail(self, error: str):
        """Mark job as failed."""
        self.status = JobStatus.FAILED
        self.completed_at = datetime.now().isoformat()

        # Add general error to failed files
        self.failed_files.append(
            {
                "file": "JOB",
                "error": error,
            }
        )

    def cancel(self):
        """Mark job as cancelled."""
        self.status = JobStatus.CANCELLED
        self.completed_at = datetime.now().isoformat()

    def add_success(
        self, input_file: str, output_file: str, input_duration: float, extracted_duration: float
    ):
        """
        Record successful file processing.

        Args:
            input_file: Input file path
            output_file: Output file path
            input_duration: Input file duration in seconds
            extracted_duration: Extracted audio duration in seconds
        """
        self.files_processed += 1
        self.output_files.append(output_file)
        self.total_input_duration += input_duration
        self.total_extracted_duration += extracted_duration

    def add_failure(self, input_file: str, error: str):
        """
        Record failed file processing.

        Args:
            input_file: Input file path that failed
            error: Error message
        """
        self.files_processed += 1
        self.files_failed += 1
        self.failed_files.append(
            {
                "file": input_file,
                "error": error,
            }
        )

    def update_progress(self, current_file: str):
        """
        Update current processing file.

        Args:
            current_file: Currently processing file path
        """
        self.current_file = current_file

    def get_summary(self) -> dict:
        """
        Get job summary statistics.

        Returns:
            Dictionary with summary information
        """
        return {
            "job_id": self.job_id,
            "status": self.status.value,
            "extraction_mode": self.extraction_mode.value,
            "apply_denoising": self.apply_denoising,
            "total_files": self.total_files,
            "files_processed": self.files_processed,
            "files_succeeded": self.files_processed - self.files_failed,
            "files_failed": self.files_failed,
            "progress_percentage": self.progress_percentage,
            "success_rate": self.success_rate,
            "total_input_duration": self.total_input_duration,
            "total_extracted_duration": self.total_extracted_duration,
            "extraction_yield": self.extraction_yield,
            "total_processing_time": self.total_processing_time,
            "created_at": self.created_at,
            "started_at": self.started_at,
            "completed_at": self.completed_at,
        }

    def to_dict(self) -> dict:
        """Convert job to dictionary."""
        return {
            "job_id": self.job_id,
            "reference_file": self.reference_file,
            "input_files": self.input_files,
            "output_dir": self.output_dir,
            "extraction_mode": self.extraction_mode.value,
            "apply_denoising": self.apply_denoising,
            "vad_threshold": self.vad_threshold,
            "quality_threshold_enabled": self.quality_threshold_enabled,
            "status": self.status.value,
            "created_at": self.created_at,
            "started_at": self.started_at,
            "completed_at": self.completed_at,
            "total_files": self.total_files,
            "files_processed": self.files_processed,
            "files_failed": self.files_failed,
            "current_file": self.current_file,
            "output_files": self.output_files,
            "failed_files": self.failed_files,
            "total_input_duration": self.total_input_duration,
            "total_extracted_duration": self.total_extracted_duration,
            "total_processing_time": self.total_processing_time,
            "summary": self.get_summary(),
        }

    @classmethod
    def from_dict(cls, data: dict) -> "ProcessingJob":
        """Create job from dictionary."""
        data = data.copy()

        # Convert enum strings to enums
        if isinstance(data.get("extraction_mode"), str):
            data["extraction_mode"] = ExtractionMode(data["extraction_mode"])

        if isinstance(data.get("status"), str):
            data["status"] = JobStatus(data["status"])

        # Remove computed properties
        data.pop("summary", None)

        return cls(**data)

    def generate_report(self) -> str:
        """
        Generate human-readable job report.

        Returns:
            Formatted report string
        """
        report = ["=== Voice Extraction Job Report ===", ""]

        report.append(f"Job ID: {self.job_id}")
        report.append(f"Status: {self.status.value.upper()}")
        report.append(f"Mode: {self.extraction_mode.value}")
        report.append(f"Denoising: {'Enabled' if self.apply_denoising else 'Disabled'}")
        report.append("")

        report.append(f"Files Processed: {self.files_processed}/{self.total_files}")
        report.append(f"Success Rate: {self.success_rate:.1f}%")
        report.append(f"Progress: {self.progress_percentage:.1f}%")
        report.append("")

        report.append(f"Input Duration: {self.total_input_duration / 60:.1f} minutes")
        report.append(f"Extracted Duration: {self.total_extracted_duration / 60:.1f} minutes")
        report.append(f"Extraction Yield: {self.extraction_yield:.1f}%")

        if self.total_processing_time > 0:
            report.append(f"Processing Time: {self.total_processing_time / 60:.1f} minutes")

        if self.files_failed > 0:
            report.append("")
            report.append(f"Failed Files ({self.files_failed}):")
            for failure in self.failed_files[:5]:  # Show first 5
                report.append(f"  - {failure['file']}: {failure['error']}")

            if len(self.failed_files) > 5:
                report.append(f"  ... and {len(self.failed_files) - 5} more")

        return "\n".join(report)