"""Changelog generation command."""


import click

from src.config import Config
from src.git_utils import GitError, NotGitRepositoryError, get_commit_history, get_repo
from src.ollama_client import OllamaClient, OllamaConnectionError
from src.output import (
    console,
    display_changelog,
    display_error,
    display_info,
    display_model_info,
)


@click.command()
@click.option("--from", "-f", "from_ref", help="Starting reference (tag, commit, branch)")
@click.option("--to", "-t", "to_ref", help="Ending reference (default: HEAD)")
@click.option("--limit", "-l", default=100, help="Maximum number of commits to process")
@click.option("--format", "output_format", type=click.Choice(["markdown", "json"]), default="markdown", help="Output format")
@click.pass_context
def changelog(ctx: click.Context, from_ref: str | None, to_ref: str | None, limit: int, output_format: str) -> None:
    """Generate a changelog from git commit history."""
    config: Config = ctx.obj["config"]
    client = OllamaClient(config)

    try:
        display_info("Connecting to Ollama...")
        client.connect_with_retry()
        display_model_info(config.ollama_host, config.model)
    except OllamaConnectionError as e:
        display_error(str(e))
        return

    try:
        repo = get_repo()
    except NotGitRepositoryError:
        display_error("Current directory is not a git repository")
        return

    with console.status("Fetching commit history..."):
        try:
            commits = get_commit_history(repo, from_ref, to_ref, limit)
        except GitError as e:
            display_error(str(e))
            return

        if not commits:
            display_info("No commits found in the specified range")
            return

    commit_data = [
        {
            "sha": c.sha,
            "message": c.message,
            "author": c.author,
            "date": c.date.isoformat() if c.date else None,
            "type": c.commit_type,
            "scope": c.scope,
        }
        for c in commits
    ]

    with console.status("Generating changelog..."):
        try:
            changelog_text = client.generate_changelog(
                commit_data,
                from_version=from_ref,
                to_version=to_ref,
            )
            display_changelog(changelog_text, from_ref, to_ref or "current")
        except OllamaConnectionError as e:
            display_error(str(e))