"""Service for writing progress log entries."""

from datetime import date
from pathlib import Path

from development_hub.paths import paths


class ProgressWriter:
    """Writes daily progress log entries to markdown files."""

    def __init__(self, progress_dir: Path | None = None):
        """Initialize progress writer.

        Args:
            progress_dir: Directory for progress files. Defaults to settings value.
        """
        self._progress_dir = progress_dir or paths.progress_dir

    def get_today_path(self) -> Path:
        """Get path to today's progress file."""
        today = date.today()
        filename = today.strftime("%Y-%m-%d.md")
        return self._progress_dir / filename

    def file_exists(self) -> bool:
        """Check if today's progress file already exists."""
        return self.get_today_path().exists()

    def create_progress_entry(
        self,
        projects: list[str],
        focus: list[str],
        completed: list[str],
        in_progress: list[str],
        blocked: list[str] | None = None,
        next_tasks: list[str] | None = None,
        notes: str | None = None,
    ) -> Path:
        """Create or update today's progress log entry.

        Args:
            projects: List of project keys worked on
            focus: Primary focus items
            completed: Completed tasks
            in_progress: Tasks in progress
            blocked: Blocked items (optional)
            next_tasks: Next up items (optional)
            notes: Additional notes (optional)

        Returns:
            Path to the created/updated file
        """
        today = date.today()
        path = self.get_today_path()

        # Build content
        lines = [
            "---",
            f"date: {today.isoformat()}",
            f"projects: [{', '.join(projects)}]",
            "---",
            "",
        ]

        # Focus section
        if focus:
            lines.append("## Focus")
            for item in focus:
                lines.append(f"- {item}")
            lines.append("")

        # Completed section
        lines.append("## Completed")
        if completed:
            for item in completed:
                lines.append(f"- [x] {item}")
        else:
            lines.append("(none yet)")
        lines.append("")

        # In Progress section
        lines.append("## In Progress")
        if in_progress:
            for item in in_progress:
                lines.append(f"- [ ] {item}")
        else:
            lines.append("(none)")
        lines.append("")

        # Blocked section
        lines.append("## Blocked")
        if blocked:
            for item in blocked:
                lines.append(f"- {item}")
        else:
            lines.append("(none)")
        lines.append("")

        # Next section
        if next_tasks:
            lines.append("## Next")
            for i, item in enumerate(next_tasks, 1):
                lines.append(f"{i}. {item}")
            lines.append("")

        # Notes section
        if notes:
            lines.append("## Notes")
            lines.append(notes)
            lines.append("")

        # Write file
        self._progress_dir.mkdir(parents=True, exist_ok=True)
        path.write_text("\n".join(lines))

        return path

    def append_completed(self, task: str) -> bool:
        """Append a completed task to today's progress.

        Args:
            task: The completed task description

        Returns:
            True if successful, False if no progress file exists
        """
        path = self.get_today_path()
        if not path.exists():
            return False

        content = path.read_text()
        lines = content.split("\n")

        # Find the Completed section
        for i, line in enumerate(lines):
            if line.strip() == "## Completed":
                # Find where to insert (after the header)
                insert_idx = i + 1
                # Skip (none yet) if present
                if insert_idx < len(lines) and lines[insert_idx].strip() == "(none yet)":
                    lines[insert_idx] = f"- [x] {task}"
                else:
                    lines.insert(insert_idx, f"- [x] {task}")
                path.write_text("\n".join(lines))
                return True

        return False

    def append_in_progress(self, task: str) -> bool:
        """Append an in-progress task to today's progress.

        Args:
            task: The task description

        Returns:
            True if successful, False if no progress file exists
        """
        path = self.get_today_path()
        if not path.exists():
            return False

        content = path.read_text()
        lines = content.split("\n")

        # Find the In Progress section
        for i, line in enumerate(lines):
            if line.strip() == "## In Progress":
                insert_idx = i + 1
                if insert_idx < len(lines) and lines[insert_idx].strip() == "(none)":
                    lines[insert_idx] = f"- [ ] {task}"
                else:
                    lines.insert(insert_idx, f"- [ ] {task}")
                path.write_text("\n".join(lines))
                return True

        return False