import glob
import re
from pathlib import Path

from ansible.errors import AnsibleError
from ansible.plugins.loader import lookup_loader
from ansible.plugins.lookup import LookupBase

from utils.cache.files import read_text
from utils.cache.yaml import load_yaml_any
from utils.roles.applications.config import get
from utils.roles.mapping import (
    ROLE_FILE_META_INFO,
    ROLE_FILE_META_MAIN,
    ROLE_FILE_VARS_MAIN,
)


class LookupModule(LookupBase):
    def run(self, terms, variables=None, **kwargs):
        """
        This lookup iterates over all roles whose folder name starts with 'web-app-'
        and generates a list of dictionaries (cards). For each role, it:

          - Reads application_id from the role's vars/main.yml
          - Reads the title from the role's README.md (the first H1 line)
          - Retrieves the description from galaxy_info.description in meta/main.yml
          - Retrieves the icon class from meta/info.yml.logo.class
          - Retrieves the display flag from meta/info.yml.display
          - Retrieves the tags from galaxy_info.galaxy_tags
          - Builds the URL using the 'domains' variable
          - Sets the iframe flag from applications

        Only cards whose application_id is included in the variable group_names are returned.
        """
        roles_dir = terms[0] if len(terms) > 0 else "roles"
        cards = []

        variables = variables or {}

        group_names = variables.get("group_names", [])

        applications = lookup_loader.get(
            "applications", loader=self._loader, templar=getattr(self, "_templar", None)
        ).run([], variables=variables, roles_dir=roles_dir)[0]

        pattern = str(Path(roles_dir) / "web-app-*")
        for role_path in glob.glob(pattern):
            role_dir = role_path.rstrip("/")
            role_basename = Path(role_dir).name

            if not role_basename.startswith("web-app-"):
                continue

            vars_path = str(Path(role_dir) / ROLE_FILE_VARS_MAIN)
            try:
                if not Path(vars_path).is_file():
                    # nocheck (TRY301): wrapped with role context by the
                    raise AnsibleError(  # noqa: TRY301
                        f"Vars file not found for role '{role_basename}': {vars_path}"
                    )
                vars_data = load_yaml_any(vars_path, default_if_missing={}) or {}
                application_id = (
                    vars_data.get("application_id")
                    if isinstance(vars_data, dict)
                    else None
                )
                if not application_id:
                    # nocheck (TRY301): wrapped with role context by the
                    raise AnsibleError(  # noqa: TRY301
                        f"Key 'application_id' not found in {vars_path}"
                    )
            except Exception as e:
                raise AnsibleError(
                    f"Error getting application_id for role '{role_basename}': {e}"
                ) from e

            if application_id not in group_names:
                continue

            readme_path = str(Path(role_dir) / "README.md")
            meta_path = str(Path(role_dir) / ROLE_FILE_META_MAIN)
            info_path = str(Path(role_dir) / ROLE_FILE_META_INFO)

            if not Path(readme_path).exists() or not Path(meta_path).exists():
                continue

            try:
                readme_content = read_text(readme_path)
                title_match = re.search(r"^#\s+(.*)$", readme_content, re.MULTILINE)
                title = title_match.group(1).strip() if title_match else application_id
            except Exception as e:
                raise AnsibleError(f"Error reading '{readme_path}': {e}") from e

            try:
                meta_data = load_yaml_any(meta_path, default_if_missing={}) or {}
                galaxy_info = (
                    meta_data.get("galaxy_info", {})
                    if isinstance(meta_data, dict)
                    else {}
                )
                description = galaxy_info.get("description", "")
                tags = galaxy_info.get("galaxy_tags", [])
            except Exception as e:
                raise AnsibleError(f"Error reading '{meta_path}': {e}") from e

            info_data: dict = {}
            if Path(info_path).is_file():
                try:
                    loaded = load_yaml_any(info_path, default_if_missing={}) or {}
                    info_data = loaded if isinstance(loaded, dict) else {}
                except Exception as e:
                    raise AnsibleError(f"Error reading '{info_path}': {e}") from e

            if not info_data.get("display", True):
                continue

            logo = info_data.get("logo") or {}
            icon_class = logo.get("class", "fa-solid fa-cube")

            domains = lookup_loader.get(
                "domains", loader=self._loader, templar=getattr(self, "_templar", None)
            ).run([], variables=variables, roles_dir=roles_dir)[0]
            domain_url = domains.get(application_id, "")

            if isinstance(domain_url, list):
                domain_url = domain_url[0]
            elif isinstance(domain_url, dict):
                domain_url = next(iter(domain_url.values()))

            domain_url = (
                self._templar.template(domain_url).strip() if domain_url else ""
            )

            url = ""
            if domain_url:
                try:
                    tls_lookup = lookup_loader.get(
                        "tls", loader=self._loader, templar=self._templar
                    )
                    base_url = tls_lookup.run(
                        [application_id, "url.base"], variables=variables
                    )[0]
                    url = str(base_url).strip().rstrip("/")
                except Exception as e:
                    raise AnsibleError(
                        f"Error building URL via tls for '{application_id}': {e}"
                    ) from e

            dashboard_cfg = get(
                applications,
                application_id,
                "services.dashboard",
                strict=False,
                default={},
            )
            if isinstance(dashboard_cfg, dict) and "iframe" in dashboard_cfg:
                iframe = dashboard_cfg["iframe"]
            else:
                iframe = get(
                    applications,
                    application_id,
                    "services.dashboard.enabled",
                    strict=False,
                    default=False,
                )

            card = {
                "icon": {"class": icon_class},
                "title": title,
                "text": description,
                "url": url,
                "link_text": f"Explore {title}",
                "iframe": iframe,
                "tags": tags,
            }

            cards.append(card)

        cards.sort(key=lambda c: c["title"].lower())

        return [cards]