from __future__ import annotations

import os
import shlex
from typing import List, Dict, Any, Optional

import docker

from .container_io import exec_shell
from .progress import progress
from .deps_pipeline import (
    find_manifest_paths_in_container,
    extract_deps_from_container,
    extract_deps_from_repo,
)


def _get_source_labels(all_labels: Dict[str, str]) -> tuple[Optional[str], Optional[str], Optional[str]]:
    source_url = (
        all_labels.get("org.opencontainers.image.source")
        or all_labels.get("org.opencontainers.image.url")
        or all_labels.get("org.opencontainers.image.documentation")
        or all_labels.get("org.label-schema.vcs-url")
        or all_labels.get("org.label-schema.url")
    )
    source_revision = (
        all_labels.get("org.opencontainers.image.revision")
        or all_labels.get("org.label-schema.vcs-ref")
    )
    image_version_label = (
        all_labels.get("org.opencontainers.image.version")
        or all_labels.get("org.label-schema.version")
    )
    return source_url, source_revision, image_version_label


def _guess_language_from_manifests(paths: List[str]) -> Optional[str]:
    for p in paths:
        base = os.path.basename(p)
        lower = base.lower()
        if lower.startswith("requirements") or base in ("Pipfile", "pyproject.toml", "poetry.lock"):
            return "python"
        if base in ("package.json", "package-lock.json", "yarn.lock", "pnpm-lock.yaml"):
            return "nodejs"
        if base in ("go.mod", "go.sum"):
            return "go"
        if base in ("Cargo.toml", "Cargo.lock"):
            return "rust"
        if base in ("pom.xml", "build.gradle", "build.gradle.kts"):
            return "java"
        if lower.endswith((".csproj", ".fsproj")) or base == "packages.config":
            return ".net"
    return None


def _find_code_files(container, workdir: str, max_depth: int = 4, limit: int = 10) -> List[str]:
    wd_q = shlex.quote(workdir or "/")
    cmd = (
        f"cd {wd_q} 2>/dev/null || cd /; "
        f"find . -maxdepth {max_depth} -type f \\( -name 'main.*' -o -name 'app.*' -o -name 'index.*' \\) "
        f"2>/dev/null | head -n {limit}"
    )
    exit_code, out = exec_shell(container, cmd)
    if exit_code != 0:
        return []
    return [line.strip() for line in out.splitlines() if line.strip()]


def _guess_language_from_code_files(code_paths: List[str]) -> Optional[str]:
    for p in code_paths:
        pl = p.lower()
        if pl.endswith(".py"):
            return "python"
        if pl.endswith((".js", ".mjs", ".cjs")):
            return "nodejs"
        if pl.endswith(".go"):
            return "go"
        if pl.endswith(".rs"):
            return "rust"
        if pl.endswith((".java", ".kt")):
            return "java"
        if pl.endswith((".cs", ".fs")):
            return ".net"
    return None


def scan_running_containers(*, progress_enabled: bool = True) -> List[Dict[str, Any]]:
    client = docker.from_env()
    result: List[Dict[str, Any]] = []

    containers = client.containers.list()
    it = progress(containers, total=len(containers), desc="Сканирование контейнеров") if progress_enabled else iter(containers)
    for c in it:
        info = c.attrs

        image = info["Config"]["Image"]
        created = info["Created"]
        ports = info["NetworkSettings"]["Ports"]
        mounts = info.get("Mounts", [])
        status = c.status

        labels_container = info["Config"].get("Labels", {}) or {}
        image_cfg = c.image.attrs.get("Config", {}) or {}
        image_labels = image_cfg.get("Labels", {}) or {}
        all_labels = {**image_labels, **labels_container}

        source_url, source_revision, image_version_label = _get_source_labels(all_labels)

        tags = c.image.tags
        tag_version = tags[0].split(":", 1)[-1] if tags else None

        workdir = info["Config"].get("WorkingDir") or "/"

        dep_paths = find_manifest_paths_in_container(c, workdir)
        language = _guess_language_from_manifests(dep_paths)

        code_paths = _find_code_files(c, workdir)
        if language is None:
            language = _guess_language_from_code_files(code_paths)

        container_data: Dict[str, Any] = {
            "name": c.name,
            "image": image,
            "id": c.id[:12],
            "status": status,
            "create_time": created,
            "ports": ports,
            "mounted_data": mounts,
            "version": tag_version,
            "image_version_label": image_version_label,
            "labels": labels_container,
            "all_labels": all_labels,
            "source_url": source_url,
            "source_revision": source_revision,
            "language": language,
            "dep_files": dep_paths,
            "code_files": code_paths,
        }

        deps_source = "none"
        deps_info: Dict[str, Any] = {"manifests": [], "dependencies": [], "errors": []}

        if dep_paths:
            deps_source = "container"
            deps_info = extract_deps_from_container(c, workdir, dep_paths)
        elif source_url:
            deps_source = "git"
            deps_info = extract_deps_from_repo(source_url, source_revision)

        container_data["deps_source"] = deps_source
        container_data["dep_manifests_used"] = deps_info.get("manifests", [])
        container_data["dependencies"] = deps_info.get("dependencies", [])
        container_data["dep_errors"] = deps_info.get("errors", [])

        result.append(container_data)

    return result