"""Prepare selected repositories by committing reviewed dirty worktrees."""

from __future__ import annotations

from pathlib import Path
import subprocess

from .git_state import collect_repository_snapshot
from .repository_push import command_text, compact_output
from .workspace import load_repository_specs, resolve_repo_path, resolve_workspace_root


def prepare_repositories(
    *,
    repos: tuple[str, ...],
    repo_versions: dict[str, str] | None = None,
    message: str | None = None,
    workspace_root: Path | str | None = None,
    apply: bool = False,  # noqa: A002 - mirrors API field.
) -> dict[str, object]:
    workspace = resolve_workspace_root(workspace_root)
    specs = {spec.name: spec for spec in load_repository_specs(include_website=False)}
    selected = tuple(dict.fromkeys(repos))
    versions = repo_versions or {}
    results: list[dict[str, object]] = []

    for repo in selected:
        spec = specs.get(repo)
        if spec is None:
            results.append({"repo": repo, "status": "blocked", "detail": "repository is not listed in repositories.json"})
            continue
        snapshot = collect_repository_snapshot(spec, workspace_root=workspace, target_tag=None, online=False)
        commit_message = resolve_message(repo=repo, version=versions.get(repo), message=message)
        command = f"{command_text(('git', 'add', '-A'))} && {command_text(('git', 'commit', '-m', commit_message))}"
        row: dict[str, object] = {
            "repo": repo,
            "cwd": snapshot.absolute_path,
            "branch": snapshot.branch,
            "upstream": snapshot.upstream,
            "head": snapshot.head,
            "ahead": int(snapshot.ahead or 0),
            "behind": int(snapshot.behind or 0),
            "dirty_count": len(snapshot.dirty_entries),
            "dirty_entries": snapshot.dirty_entries,
            "message": commit_message,
            "command": command,
        }
        if not snapshot.exists or not snapshot.is_git:
            results.append({**row, "status": "blocked", "detail": "repository is missing or is not a Git repository"})
            continue
        if snapshot.safe_directory_required:
            results.append({**row, "status": "blocked", "detail": "Git safe.directory approval is required"})
            continue
        if not snapshot.has_head:
            results.append({**row, "status": "blocked", "detail": "repository has no HEAD; initialize it outside the release prepare step"})
            continue
        if not snapshot.branch:
            results.append({**row, "status": "blocked", "detail": "repository is not on a named branch"})
            continue
        if snapshot.behind:
            results.append({**row, "status": "blocked", "detail": f"repository is behind {snapshot.upstream}; sync/update before committing"})
            continue
        if not snapshot.dirty_entries:
            results.append({**row, "status": "noop", "detail": "worktree is clean; no prepare commit needed"})
            continue
        if not apply:
            results.append({**row, "status": "planned", "detail": f"{len(snapshot.dirty_entries)} dirty/untracked path(s) will be committed"})
            continue

        path = resolve_repo_path(spec, workspace)
        add_result = run(("git", "add", "-A"), cwd=path)
        if add_result.returncode != 0:
            results.append(
                {
                    **row,
                    "status": "failed",
                    "returncode": add_result.returncode,
                    "detail": "git add failed",
                    "stdout": compact_output(add_result.stdout),
                    "stderr": compact_output(add_result.stderr),
                }
            )
            continue
        if run(("git", "diff", "--cached", "--quiet"), cwd=path).returncode == 0:
            results.append({**row, "status": "noop", "detail": "nothing staged after git add -A"})
            continue
        commit_result = run(("git", "commit", "-m", commit_message), cwd=path)
        if commit_result.returncode != 0:
            results.append(
                {
                    **row,
                    "status": "failed",
                    "returncode": commit_result.returncode,
                    "detail": "git commit failed",
                    "stdout": compact_output(commit_result.stdout),
                    "stderr": compact_output(commit_result.stderr),
                }
            )
            continue
        after = collect_repository_snapshot(spec, workspace_root=workspace, target_tag=None, online=False)
        results.append(
            {
                **row,
                "status": "committed",
                "returncode": commit_result.returncode,
                "detail": f"created commit {after.head or 'HEAD'}",
                "after_head": after.head,
                "after_ahead": int(after.ahead or 0),
                "after_dirty_count": len(after.dirty_entries),
                "stdout": compact_output(commit_result.stdout),
                "stderr": compact_output(commit_result.stderr),
            }
        )

    if any(item["status"] in {"blocked", "failed"} for item in results):
        status = "blocked" if not apply else "partial"
    elif any(item["status"] == "committed" for item in results):
        status = "committed"
    elif any(item["status"] == "planned" for item in results):
        status = "planned"
    else:
        status = "noop"
    return {"status": status, "apply": apply, "repositories": results}


def resolve_message(*, repo: str, version: str | None, message: str | None) -> str:
    if message and message.strip():
        return message.strip()
    target = f"v{version.removeprefix('v')}" if version else "release"
    return f"Release {repo} {target}"


def run(command: tuple[str, ...], *, cwd: Path) -> subprocess.CompletedProcess[str]:
    try:
        return subprocess.run(command, cwd=cwd, check=False, text=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, timeout=120)
    except subprocess.TimeoutExpired as exc:
        return subprocess.CompletedProcess(command, 124, exc.stdout or "", exc.stderr or "git command timed out")