evening_lights_apply:
  alias: Evening Lights - Apply Schedule
  description: >-
    Sets each evening light to its scheduled brightness for the current time,
    blending linearly between the points in `schedule`. apply=force turns the
    lights on (sunset, TV off); apply=ramp only eases lights that are already
    on, and leaves alone any light someone has changed by hand. While TV mode
    is on the living room and the lights that glare on the TV are left alone.
  mode: queued
  fields:
    apply:
      description: "force: turn lights on at the target. ramp: only adjust lights that are already on."
      example: ramp
      selector:
        select:
          options:
          - force
          - ramp
  variables:
    # [minute of day, brightness %] - 1230 = 20:30, 1260 = 21:00,
    # 1290 = 21:30, 1350 = 22:30. Before the first point a light sits at the
    # first value; after the last it holds the last value until lights-out.
    schedule:
      light.kitchen_lights: [[1230, 100], [1260, 50], [1290, 25], [1350, 1]]
      light.kitchen_wall_light: [[1230, 100], [1260, 50], [1290, 25], [1350, 1]]
      light.bathroom_hallway: [[1230, 75], [1260, 50], [1290, 25], [1350, 10]]
      light.living_room: [[1230, 100], [1260, 50], [1290, 25], [1350, 10]]
      light.dining_hall: [[1290, 25], [1350, 15]]
    tv_mode_lights:
    - light.living_room
    - light.kitchen_wall_light
    - light.dining_hall
    - light.bathroom_hallway
    apply_mode: "{{ apply | default('ramp') }}"
  sequence:
  - repeat:
      for_each: "{{ schedule.keys() | list }}"
      sequence:
      - variables:
          light: "{{ repeat.item }}"
          # [target now, target 5 minutes ago - what the last ramp tick set]
          levels: >-
            {%- macro at(pts, t) -%}
              {%- if t <= pts[0][0] -%}{{ pts[0][1] }}
              {%- elif t >= pts[-1][0] -%}{{ pts[-1][1] }}
              {%- else -%}
                {%- for i in range(pts | length - 1) if pts[i][0] <= t < pts[i + 1][0] -%}
                  {{ (pts[i][1] + (pts[i + 1][1] - pts[i][1]) * (t - pts[i][0]) / (pts[i + 1][0] - pts[i][0])) | round(0) | int }}
                {%- endfor -%}
              {%- endif -%}
            {%- endmacro -%}
            {%- set t = now().hour * 60 + now().minute -%}
            {{ [at(schedule[repeat.item], t) | int, at(schedule[repeat.item], t - 5) | int] }}
          current: "{{ ((state_attr(repeat.item, 'brightness') or 0) / 2.55) | round(0) | int }}"
          skip: "{{ is_state('input_boolean.tv_mode', 'on') and repeat.item in tv_mode_lights }}"
      - choose:
        - conditions: "{{ not skip and apply_mode == 'force' }}"
          sequence:
          - action: light.turn_on
            target:
              entity_id: "{{ light }}"
            data:
              brightness_pct: "{{ levels[0] }}"
              transition: 2
        # A light more than 10 points off the last tick was set by hand; the
        # biggest scheduled change in 5 minutes is ~8
        - conditions: >-
            {{ not skip and apply_mode == 'ramp' and is_state(light, 'on')
               and (current - levels[1]) | abs <= 10 and current != levels[0] }}
          sequence:
          - action: light.turn_on
            target:
              entity_id: "{{ light }}"
            data:
              brightness_pct: "{{ levels[0] }}"
              transition: 60