# -*- coding: utf-8 -*-
# vim: ft=jinja

{#- Get the `tplroot` from `tpldir` #}
{%- set tplroot = tpldir.split("/")[0] %}
{%- from tplroot ~ "/libmatchers.jinja" import parse_matchers, query_map %}

{#- Where to lookup parameters source files #}
{%- set map_sources_dir = tplroot ~ "/parameters" %}

{#- List of sources to lookup for parameters #}
{#- Fallback to previously used grains plus minion `id` #}
{%- set map_sources = [
      "Y:G@osarch",
      "Y:G@os_family",
      "Y:G@os",
      "Y:G@osfinger",
      "C@" ~ tplroot ~ ":lookup",
      "C@" ~ tplroot,
      "Y:G@id",
    ] %}
{%- do salt["log.debug"](
      "map.jinja: built-in configuration sources:\n"
      ~ {"values": {
          "map_jinja": {"sources": map_sources}
          }
        }
      | yaml(False)
    ) %}

{#- Allow centralised map.jinja configuration #}
{%- set _global_map_filename = "parameters/map_jinja.yaml" %}
{%- do salt["log.debug"](
      "map.jinja: load global map.jinja values from "
      ~ _global_map_filename
    ) %}
{%- load_yaml as global_map_settings %}
{%-   include _global_map_filename ignore missing %}
{%- endload %}

{%- if global_map_settings %}
{%-   do salt["log.debug"](
        "map.jinja: configure sources from global map.jinja configuration "
        ~ _global_map_filename
        ~ ":\n"
        ~ {"map_jinja": global_map_settings}
        | yaml(False)
      ) %}
{%-   set map_sources = global_map_settings
        | traverse(
          "values:sources",
          map_sources,
      ) %}
{%- endif %}

{#- Allow per formula map.jinja configuration #}
{%- set _map_filename = map_sources_dir ~ "/map_jinja.yaml" %}
{%- do salt["log.debug"](
      "map.jinja: load per formula map.jinja values from "
      ~ _map_filename
    ) %}
{%- load_yaml as map_settings %}
{%-   include _map_filename ignore missing %}
{%- endload %}

{%- if map_settings %}
{%-   do salt["log.debug"](
        "map.jinja: configure sources from formula map.jinja configuration "
        ~ _map_filename
        ~ ":\n"
        ~ {"map_jinja": map_settings}
        | yaml(False)
      ) %}
{%-   set map_sources = map_settings
      | traverse(
        "values:sources",
        map_sources,
      ) %}
{%- endif %}

{%- do salt["log.debug"](
      "map.jinja: load parameters from sources:\n"
      ~ map_sources
      | yaml(False)
    ) %}

{#- Load formula defaults values #}
{%- set _defaults_filename = map_sources_dir ~ "/defaults.yaml" %}
{%- do salt["log.debug"](
      "map.jinja: load per formula default values from "
      ~ _defaults_filename
    ) %}
{%- load_yaml as default_settings %}
{%-   include _defaults_filename ignore missing %}
{%- endload %}

{%- if not default_settings %}
{%-   set default_settings = {'values': {} } %}
{%- endif %}

{#- Make sure to track `map.jinja` configuration with `_mapdata` #}
{%- do default_settings["values"].update(
      {
        "map_jinja": map_settings
        | traverse("values", {})
      }
    ) %}

{#- Work around assignment inside for loop #}
{#- load configuration values used in `config.get` merging strategies #}
{%- set _config = {
      "stack": default_settings.get("values", {}),
      "merge_strategy": salt["config.get"](tplroot ~ ":strategy", None),
      "merge_lists": salt["config.get"](tplroot ~ ":merge_lists", False),
    } %}

{#- `parse_matchers` returns a `list` of `dict` with #}
{#-  - type: `F` to load file, `C`, `G`, `I` for lookup #}
{#-  - option: specific to the type #}
{#-  - query: which key is requested #}
{#-  - query_method: the salt method doing the query `config.get`, `pillar.get` and `grains.get` #}
{#-  - value: the result of the `salt[<query_method>](<query>)` #}
{%- set map_matchers = parse_matchers(
      matchers=map_sources,
      config_get_strategy=_config["merge_strategy"],
      log_prefix="map.jinja: "
    )
    | load_yaml %}

{%- for matcher in map_matchers %}

{%-   if matcher.type in query_map.keys() %}
{#-     Merge in `mapdata.<query>` instead of directcly in `mapdata` #}
{%-     set is_sub_key = matcher.option | default(False) == "SUB" %}

{#-     `slsutil.merge` defaults to `smart` instead of `None` for `config.get` #}
{%-     set _strategy = _config["merge_strategy"] | default("smart", boolean=True) %}
{%-     do salt["log.debug"](
          "map.jinja: merge "
          ~ "sub key " * is_sub_key
          ~ "'"
          ~ matcher.query
          ~ "' retrieved with '"
          ~ matcher.query_method
          ~ "', merge: strategy='"
          ~ _strategy
          ~ "', lists='"
          ~ _config["merge_lists"]
          ~ "'"
        ) %}

{#-     empty value is an empty list, it must be an empty dict for `.update` #}
{%-     set value = matcher.value | default({}, boolean=True) %}
{%-     if is_sub_key %}
{#-       Merge values with `mapdata.<key>`, `<key>` and `<key>:lookup` are merged together #}
{%-       set value = { matcher.query | regex_replace("(:lookup)?$", ""): value } %}
{%-     endif %}
{%-     do _config.update(
          {
            "stack": salt["slsutil.merge"](
              _config["stack"],
              value,
              strategy=_strategy,
              merge_lists=_config["merge_lists"],
            )
          }
        ) %}
{%-   else %}
{#-     Load YAML file matching the grain/pillar/... #}
{#-     Fallback to use the source name as a direct filename #}
{#-     Mangle `source_key` to use it as literal path #}
{%-     if matcher.value | length == 0 %}
{%-       set query_parts = matcher.query.split("/") %}
{%-       set map_dirname = query_parts[0:-1] | join("/") %}
{%-       set map_values = query_parts[-1] | regex_replace("(\.yaml)?$", ".yaml") %}
{%-     else %}
{%-       set map_dirname = matcher.query %}
{%-       set map_values = matcher.value %}
{%-     endif %}

{#-     Some configuration return list #}
{%-     if map_values is string %}
{%-       set map_values = [map_values] %}
{%-     endif %}

{#-     `map_dirname` can be an empty string with literal path like `myconf.yaml` #}
{%-     set yaml_dir = [
          map_sources_dir,
          map_dirname
        ]
        | select
        | join("/") %}

{%-     for map_value in map_values %}
{%-       set yamlfile = [
            yaml_dir,
            map_value ~ ".yaml"
          ]
          | join("/") %}
{%-       do salt["log.debug"]("map.jinja: load parameters from file " ~ yamlfile) %}
{%-       load_yaml as loaded_values %}
{%-         include yamlfile ignore missing %}
{%-       endload %}

{%-       if loaded_values %}
{#-         Merge loaded values on the stack #}
{%-         do salt["log.debug"]("map.jinja: merge parameters from " ~ yamlfile) %}
{%-         do _config.update(
              {
                "stack": salt["slsutil.merge"](
                  _config["stack"],
                  loaded_values.get("values", {}),
                  strategy=loaded_values.get("strategy", "smart"),
                  merge_lists=loaded_values.get("merge_lists", False)
                  | to_bool,
                )
              }
            ) %}
{%-       endif %}
{%-     endfor %}
{%-   endif %}
{%- endfor %}

{%- do salt["log.debug"]("map.jinja: save parameters in variable 'mapdata'") %}
{%- set mapdata = _config["stack"] %}