"""
UNIX Pipeline Paradigm - Stream processing with awk, sed, perl.
"""

import time
from typing import Dict, Any, List, Optional

from ..base import BaseQueryParadigm, QueryResult


class UNIXPipelineParadigm(BaseQueryParadigm):
    """UNIX pipeline paradigm for stream processing."""

    @property
    def name(self) -> str:
        return "UNIX Pipeline"

    @property
    def description(self) -> str:
        return "Stream processing with UNIX tools like awk, sed, grep, sort for line-by-line data manipulation"

    @property
    def category(self) -> str:
        return "procedural"

    @property
    def complexity(self) -> str:
        return "advanced"

    def execute(self, query: str, config: Dict[str, Any] = None) -> QueryResult:
        """Execute UNIX pipeline (not yet implemented)."""
        start_time = time.time()
        execution_time = (time.time() - start_time) * 1000

        return QueryResult(
            paradigm=self.name,
            query=query,
            execution_time_ms=execution_time,
            result_count=0,
            results=[],
            metadata={
                "status": "not_implemented",
                "implementation_issue": "TBD - to be created",
                "description": "UNIX pipelines enable powerful stream processing of MarkiTect data"
            },
            success=False,
            error_message="UNIX Pipeline paradigm not yet implemented."
        )

    def get_examples(self) -> List[Dict[str, str]]:
        """Get example UNIX pipeline commands."""
        return [
            {
                "name": "Filter and count",
                "description": "Find files by author and count",
                "query": "markitect export --format=csv | grep 'Alice' | wc -l"
            },
            {
                "name": "Extract and sort",
                "description": "Extract unique authors and sort",
                "query": "markitect export --format=csv | cut -d',' -f3 | sort | uniq -c | sort -rn"
            },
            {
                "name": "Complex awk processing",
                "description": "Process file metadata with awk",
                "query": "markitect export --format=csv | awk -F',' '{if($4>1000) print $1,$2}' | sort"
            },
            {
                "name": "Sed text transformation",
                "description": "Transform file paths using sed",
                "query": "markitect list-files | sed 's|/old/path|/new/path|g' | sort"
            }
        ]

    def validate_query(self, query: str) -> tuple[bool, Optional[str]]:
        """Validate UNIX pipeline command."""
        if not query.strip():
            return False, "UNIX pipeline cannot be empty"

        if '|' not in query and not any(cmd in query for cmd in ['grep', 'awk', 'sed', 'sort', 'cut', 'wc']):
            return False, "Query should contain UNIX pipeline commands"

        return True, None

    def get_syntax_help(self) -> str:
        """Get syntax help for UNIX pipelines."""
        return """UNIX Pipeline Syntax:

Basic Structure:
markitect <export_command> | <unix_tools> | <more_tools>

Common Tools:
- grep: Filter lines matching pattern
- awk: Process fields and records
- sed: Stream editor for text transformation
- sort: Sort lines
- uniq: Remove duplicate lines
- cut: Extract fields
- wc: Count lines/words/characters

Examples:
markitect export --format=csv | grep 'documentation' | cut -d',' -f1,2
markitect list-files | awk '{print $1}' | sort | uniq
markitect export --format=csv | sed 's/old/new/g' | grep -v '^#'

The pipeline starts with MarkiTect data export and processes it through UNIX tools.
"""