"""Summary Reporter module for the PAT Manager system.

Generates a human-readable summary report of PAT lifecycle check results
suitable for GitHub Actions log output.
"""

from __future__ import annotations

from .models import CheckResult, PatStatus, RotationResult


class SummaryReporter:
    """Produces a formatted summary report of PAT check and rotation results.

    The report includes a table of all checked PATs with their status and
    details, plus a rotation results section if any tokens were rotated.
    """

    def report(
        self, results: list[CheckResult], rotations: list[RotationResult]
    ) -> str:
        """Generate a plain-text summary report.

        Args:
            results: List of check results for all PATs in the registry.
            rotations: List of rotation results for tokens that were rotated.

        Returns:
            A formatted plain-text string suitable for printing to the
            GitHub Actions log.
        """
        lines: list[str] = []
        lines.append("=== PAT Lifecycle Check Summary ===")
        lines.append("")

        # Build the table
        lines.append(self._build_table(results))

        # Add rotation section if there are rotation results
        successful_rotations = [r for r in rotations if r.success]
        if successful_rotations:
            lines.append("")
            lines.append("--- Rotation Results ---")
            for rotation in successful_rotations:
                lines.append(self._format_rotation(rotation))

        return "\n".join(lines)

    def _build_table(self, results: list[CheckResult]) -> str:
        """Build the formatted results table.

        Args:
            results: List of check results to display.

        Returns:
            Formatted table string with header, separator, and data rows.
        """
        # Column headers
        header_service = "Service"
        header_token = "Token Name"
        header_status = "Status"
        header_details = "Details"

        # Calculate column widths based on content
        service_width = max(
            len(header_service),
            *(len(r.entry.service) for r in results) if results else [0],
        )
        token_width = max(
            len(header_token),
            *(len(r.entry.token_name) for r in results) if results else [0],
        )
        status_width = max(
            len(header_status),
            *(len(r.status.value) for r in results) if results else [0],
        )
        details_width = max(
            len(header_details),
            *(len(self._get_details(r)) for r in results) if results else [0],
        )

        # Format header
        header = (
            f"{header_service:<{service_width}} | "
            f"{header_token:<{token_width}} | "
            f"{header_status:<{status_width}} | "
            f"{header_details:<{details_width}}"
        )

        # Format separator
        separator = (
            f"{'-' * service_width}-+-"
            f"{'-' * token_width}-+-"
            f"{'-' * status_width}-+-"
            f"{'-' * details_width}"
        )

        # Format data rows
        rows: list[str] = []
        for result in results:
            details = self._get_details(result)
            row = (
                f"{result.entry.service:<{service_width}} | "
                f"{result.entry.token_name:<{token_width}} | "
                f"{result.status.value:<{status_width}} | "
                f"{details:<{details_width}}"
            )
            rows.append(row)

        table_lines = [header, separator] + rows
        return "\n".join(table_lines)

    def _get_details(self, result: CheckResult) -> str:
        """Get the details string for a check result.

        Args:
            result: The check result to describe.

        Returns:
            A human-readable details string based on the PAT status.
        """
        if result.status == PatStatus.CHECK_FAILED:
            return result.error_message or "Unknown error"
        if result.status == PatStatus.EXPIRED:
            return "0 days remaining"
        if result.days_remaining is not None:
            return f"{result.days_remaining} days remaining"
        return ""

    def _format_rotation(self, rotation: RotationResult) -> str:
        """Format a single rotation result line.

        Args:
            rotation: A successful rotation result.

        Returns:
            Formatted string like:
            "GitLab/token-name: Rotated successfully (old: 2025-07-01, new: 2025-08-01)"
        """
        if rotation.entry is not None:
            service = rotation.entry.service
            token_name = rotation.entry.token_name
        else:
            service = "Unknown"
            token_name = "unknown-token"

        old_date = rotation.old_expiry_date or "N/A"
        new_date = rotation.new_expiry_date or "N/A"

        return (
            f"{service}/{token_name}: "
            f"Rotated successfully (old: {old_date}, new: {new_date})"
        )