# =============================================================================
# sky-cam.conf — master configuration for all sky-cam scripts
# =============================================================================
#
# This is the ONLY file you need to edit.  After editing, run:
#
#   ./install.sh           # installs systemd timers (no root needed)
#   ./install.sh --system  # system-wide install (requires sudo)
#
# Re-run install.sh any time this file changes.
#
# -----------------------------------------------------------------------------
# MANUAL SYSTEMD SETUP (if you prefer not to use install.sh)
# -----------------------------------------------------------------------------
# After editing this file, generate the unit files:
#
#   mkdir -p ~/.config/systemd/user
#   cp systemd/*.service systemd/*.timer ~/.config/systemd/user/
#
# Then edit ExecStart= in each .service file to match your SCRIPT_DIR, then:
#
#   systemctl --user daemon-reload
#   systemctl --user enable --now sky-cam-sunrise.timer
#   # one sky-cam-seasons-<cam>.timer per camera, e.g.:
#   systemctl --user enable --now sky-cam-seasons-east.timer
#
# Check status:
#   systemctl --user list-timers 'sky-cam-*'
#   journalctl --user -u sky-cam-seasons-sunrise.service -f
#
# System-wide (replace --user with no flag, prepend sudo):
#   sudo cp systemd/*.service systemd/*.timer /etc/systemd/system/
#   sudo systemctl daemon-reload && sudo systemctl enable --now sky-cam-*.timer
#
# -----------------------------------------------------------------------------
# SCRIPT MAP — what each file does and when it runs
# -----------------------------------------------------------------------------
#
#  You run / schedule:
#    daily_sunrise_video.sh — daily at SCHEDULE_SUNRISE (via systemd, SUNRISE_CAM only)
#                             grabs images around sunrise, makes a short video,
#                             uploads it to Mattermost
#
#    4-seasons.sh <cam>     — daily at SCHEDULE_SEASONS_<cam> (via systemd, per camera)
#                             makes yesterday's daily clip sized to its share
#                             of the matching Vivaldi movement's music duration;
#                             on the last day of a movement, auto-triggers
#                             montage-mvt.sh
#
#    moon-track.sh          — nightly at SCHEDULE_MOON_TRACK (SUNRISE_CAM only)
#                             detects the moon in each east night frame, crops
#                             a tracked sequence, stitches into an mp4
#
#    moon-phase-monthly.sh  — daily at SCHEDULE_MOON_PHASE (SUNRISE_CAM only)
#                             no-ops except on phase post-days, when it
#                             confirms east saw the moon during the
#                             collection window, fetches NASA SVS Dial-a-Moon
#                             for that exact UTC hour, renders the moon
#                             full-screen on a black background, and posts to
#                             Mattermost.  Handles full moon, first quarter
#                             (waxing half), and third quarter (waning half).
#
#
#    install.sh             — run once at setup, and again if this file changes
#                             generates and installs systemd units from conf
#
#    stitch-cameras.py      — run manually when needed
#                             stitches north + sunrise into a panorama
#                             usage: python3 stitch-cameras.py north.jpg sunrise.jpg prefix [focal]
#
#  Auto-triggered (do not run directly):
#    montage-mvt.sh         — called by 4-seasons.sh on last day of each movement
#                             concatenates all daily clips for the movement,
#                             speed-adjusts to match music, overlays attribution,
#                             sends completion notification; on last Autumn
#                             movement also triggers year-end-join.sh
#
#    year-end-join.sh       — called by montage-mvt.sh at end of Autumn Mvt 3
#                             concatenates all 12 movement montages into one
#                             Four Seasons year video, sends notification
#
#  Helpers (called by the scripts above, not run directly):
#    notify.sh              — sends notifications via ntfy / email / Mattermost
#    season_info.py         — outputs astronomical season/movement/year for a date
#    sunrise.py             — outputs today's sunrise time (used by daily_sunrise_video)
#    sunrise2mm.py          — uploads the sunrise video to Mattermost
#    sunrise_overlay.py     — burns a timestamp overlay onto the sunrise video
#
# -----------------------------------------------------------------------------
# FILE DEPENDENCIES — who calls whom, and what to update if you rename a file
# -----------------------------------------------------------------------------
#
#  sky-cam.conf  (this file)
#    ← sourced by every .sh script; read by sunrise.py, sunrise2mm.py
#    → if renamed: update the 'source' line at the top of ALL scripts
#                  (don't rename it — just edit it in place)
#
#  install.sh
#    ← run manually; reads this conf
#    → if renamed: update the note at the top of this conf file only
#    generates → systemd unit files (sky-cam-*.service / .timer)
#                and sky-cam-notify-failure@.service
#
#  daily_sunrise_video.sh
#    ← called by systemd sky-cam-sunrise.timer (SCHEDULE_SUNRISE)
#    → if renamed: update install.sh (write_service call ~line 70)
#                  then re-run install.sh to regenerate the unit
#    calls → sunrise.py, sunrise_overlay.py, sunrise2mm.py
#
#  4-seasons.sh
#    ← called by systemd sky-cam-seasons-<cam>.timer (SCHEDULE_SEASONS_<cam>)
#    → if renamed: update install.sh (write_service call ~line 85)
#                  then re-run install.sh
#    calls → season_info.py, montage-mvt.sh
#
#  montage-mvt.sh
#    ← called by 4-seasons.sh on the last day of each movement
#    → if renamed: update 4-seasons.sh (the exec line near the bottom)
#    calls → season_info.py, notify.sh, year-end-join.sh
#
#  year-end-join.sh
#    ← called by montage-mvt.sh at end of Autumn Mvt 3
#    → if renamed: update montage-mvt.sh (the exec line at the bottom)
#    calls → notify.sh
#
#  notify.sh
#    ← called by montage-mvt.sh, year-end-join.sh
#       also referenced in install.sh for the OnFailure= failure template
#    → if renamed: update montage-mvt.sh, year-end-join.sh, install.sh
#
#  season_info.py
#    ← called by 4-seasons.sh and montage-mvt.sh
#    → if renamed: update 4-seasons.sh and montage-mvt.sh (the eval lines)
#
#  sunrise.py
#    ← called by daily_sunrise_video.sh
#    → if renamed: update daily_sunrise_video.sh
#
#  sunrise_overlay.py
#    ← called by daily_sunrise_video.sh
#    → if renamed: update daily_sunrise_video.sh
#
#  sunrise2mm.py
#    ← called by daily_sunrise_video.sh
#    → if renamed: update daily_sunrise_video.sh
#
#  stitch-cameras.py
#    ← run manually only; no script calls it
#    → safe to rename with no other changes needed
#
#  moon-track.sh
#    ← called by systemd sky-cam-moon-track.timer (SCHEDULE_MOON_TRACK)
#    → if renamed: update install.sh (the moon-track write_service block)
#    calls → moon_detect.py (Python lib via heredoc), ffmpeg
#
#  moon-phase-monthly.sh
#    ← called by systemd sky-cam-moon-phase.timer (SCHEDULE_MOON_PHASE)
#    → if renamed: update install.sh (the moon-phase write_service block)
#    calls → moon_phase_monthly.py
#
#  moon_phase_monthly.py
#    ← called by moon-phase-monthly.sh
#    → if renamed: update moon-phase-monthly.sh (the exec line at the bottom)
#    calls → moon_phase.py, moon_detect.py, moon_composite.py, notify.sh
#
#  moon_phase.py / moon_detect.py / moon_composite.py
#    ← Python libraries used by moon-track.sh and moon_phase_monthly.py
#    → if renamed: update moon-track.sh, moon_phase_monthly.py, README
#
# =============================================================================

# ── Install location ──────────────────────────────────────────────────────────
# Auto-detected from where this file lives — override only if you move the
# scripts to a different location after install.
SCRIPT_DIR="${SCRIPT_DIR:-$(dirname "$(realpath "${BASH_SOURCE[0]}")")}"

# ── Storage ───────────────────────────────────────────────────────────────────
# BASE_DIR: root folder where camera images are stored.
#   Structure created automatically: BASE_DIR/<cam>/YYYY-MM-DD/HH-MM-SS.jpg
# Defaults to a 'data' subfolder next to the scripts; override to point at
# an external drive or network mount (recommended for production).
BASE_DIR="${BASE_DIR:-$SCRIPT_DIR/data}"
MOVIES_DIR="${MOVIES_DIR:-$BASE_DIR/movies}"  # override if videos live on a different drive
MUSIC_DIR="${MUSIC_DIR:-$SCRIPT_DIR/music}"
AUDIO_DIR="${AUDIO_DIR:-$BASE_DIR/audio}"     # root for all audio recordings; override in .env
#   Structure: AUDIO_DIR/<cam>/YYYY-MM-DD/HH-MM-SS.m4a         (ambient)
#              AUDIO_DIR/sunrise/<cam>/YYYY-MM-DD/sunrise-audio.m4a  (sunrise clips)

# ── Location & timezone ───────────────────────────────────────────────────────
# Used by sunrise.py to calculate sunrise time each day.
#
# To find your coordinates:
#   Google Maps — right-click your location → the first item shown is "lat, lon"
#   Or: maps.google.com, drop a pin, coordinates appear in the URL and sidebar
#
# ── Location & timezone ───────────────────────────────────────────────────────
# Set your real values in .env — do not put exact coordinates here since
# this file is committed to git.  Add these three lines to your .env:
#
#   LATITUDE=43.1234
#   LONGITUDE=-76.5678
#   TIMEZONE=America/Chicago
#
# Placeholder values below are used only if .env has not set them.
LATITUDE="${LATITUDE:-0.0000}"
LONGITUDE="${LONGITUDE:-0.0000}"
TIMEZONE="${TIMEZONE:-America/New_York}"

# ── Weather tagging (OpenWeather) ─────────────────────────────────────────────
# When enabled, ambient-record.sh queries OpenWeather's "Current weather"
# endpoint just before each 30-minute audio chunk and appends a one-word
# weather tag to the filename, e.g.:
#     east-08-30-00-thunderstorm.m4a
#     east-09-00-00-rain.m4a
#     east-09-30-00-cloudy.m4a
# That way each chunk is labelled with what was happening DURING that chunk —
# a foggy dawn won't mislabel the sunny afternoon files.
#
# Tag vocabulary (fixed set — only conditions that change the audio):
#     thunderstorm  rain  rainstorm  snow  snowstorm
# Clear / cloudy / fog / wind sound the same on the recordings, so those
# conditions fall through to the un-tagged filename.
#
# Setup:
#   1. Get a free API key: https://openweathermap.org/api
#      (the free "Current weather" tier — 60 calls/min — is plenty)
#   2. Add to .env:   OPENWEATHER_API_KEY=xxxxxxxxxxxxxxxxxxxxxxxx
#   3. Confirm LATITUDE / LONGITUDE are set in .env (already needed by sunrise.py)
#   4. Flip WEATHER_ENABLED=true below
#
# The query uses the same LATITUDE / LONGITUDE configured above — one location
# for the whole installation; per-camera coordinates are not supported.
#
# Failure-safe: if the toggle is off, the key is missing, the network is down,
# or the API errors out, weather-tag.sh prints nothing and the recorder falls
# back to the un-tagged filename.  ambient-record.sh never blocks on this.
#
# Manual test:   ./weather-tag.sh        (prints e.g. "cloudy" or nothing)
WEATHER_ENABLED=false
OPENWEATHER_API_KEY="${OPENWEATHER_API_KEY:-}"

# ── Cameras ───────────────────────────────────────────────────────────────────
# List every camera name here (space-separated inside the parentheses).
# Each name becomes a subfolder under BASE_DIR (images) and BASE_DIR/movies.
# To add a camera: add its name here, add its schedules below, re-run install.sh.
#
CAMERAS=(east north south)         # add west here + uncomment its schedule below when ready
SUNRISE_CAM=east                   # which camera faces east (gets the sunrise video job)

# ── Schedules ─────────────────────────────────────────────────────────────────
# All times are HH:MM:SS (24-hour local time).
# install.sh reads these and generates one systemd timer per camera per job.
#
# SCHEDULE_SUNRISE
#   When to START the sunrise video job.  The script wakes up, calculates
#   today's sunrise time, then WAITS internally until the capture window is
#   fully finished before touching any images.  Set this early enough to
#   cover your earliest possible sunrise minus SUNRISE_PRE_MIN — 03:00 works
#   year-round for most locations.  The video is ready a few minutes after the
#   capture window closes, not at this start time.
#
# SCHEDULE_SEASONS_<cam>  (one per camera in CAMERAS)
#   When to run the Four Seasons daily clip job.  Processes YESTERDAY'S images
#   (not today's) — always runs after midnight.  On the last day of a season
#   movement this automatically triggers the movement montage build.
#   Space multiple cameras at least 30 min apart to avoid disk contention.
#
SCHEDULE_SUNRISE=03:00:00

# Moon jobs (see "Moon jobs" section further down)
SCHEDULE_MOON_TRACK=02:30:00       # nightly tracker — runs after midnight, before seasons
SCHEDULE_MOON_PHASE=09:30:00       # daily check; no-ops except on phase post-days

# Four Seasons daily clip — one per camera, staggered 30 min apart.
# Processes yesterday's images; on the last day of a movement auto-triggers
# montage-mvt.sh.  Space cameras at least 30 min apart to avoid disk contention.
SCHEDULE_SEASONS_east=01:00:00
SCHEDULE_SEASONS_north=01:30:00
SCHEDULE_SEASONS_south=02:00:00
# To add west: uncomment below, add west to CAMERAS above, add CAM_RTSP_west to .env
#SCHEDULE_SEASONS_west=02:30:00

# ── Sunrise video tuning ──────────────────────────────────────────────────────
# Capture window around sunrise:
#   Images from (sunrise - SUNRISE_PRE_MIN) to (sunrise + SUNRISE_POST_MIN)
#   are included in the clip.  Larger windows give more context; they are all
#   speed-adjusted to fit SUNRISE_TARGET_SECS regardless of window size.
SUNRISE_PRE_MIN=70         # minutes before sunrise to start capturing
SUNRISE_POST_MIN=10        # minutes after sunrise to stop capturing
# Target length of the final sunrise video (seconds).
SUNRISE_TARGET_SECS=10
# Burn the local sunrise time vertically on the right side of the video.
# Set false to skip the overlay entirely (cleaner look, faster encoding).
SUNRISE_OVERLAY_ENABLED=true
# Opacity of the sunrise-time text (0.0 = invisible, 1.0 = fully opaque).
SUNRISE_OVERLAY_OPACITY=0.45
# Delete daily sunrise videos older than this many days (rolling window).
# Set 0 to keep forever.
SUNRISE_RETENTION_DAYS=10
# Delete unpinned sunrise posts from Mattermost older than this many days.
# Pinned posts are always kept regardless.  Set 0 to disable Mattermost cleanup.
MM_SUNRISE_RETENTION_DAYS=8
# Output directory for --test runs.  Kept separate from production sunrise videos.
# Test files older than DEMO_RETENTION_DAYS are deleted automatically.
DEMO_DIR="${DEMO_DIR:-$MOVIES_DIR/demoio}"
DEMO_RETENTION_DAYS=8

# ── Video encoding quality ────────────────────────────────────────────────────
# FFmpeg CRF: lower = higher quality / larger files.  Typical range 18–30.
#   18 ≈ visually lossless     23 = ffmpeg default     28 = smaller/lower
# H.265 (libx265) CRF is not directly comparable — H.265 CRF 22 ≈ H.264 CRF 26
# in visual quality but ~40-50% smaller file.  Final montages use H.265;
# intermediates (deleted after use) stay H.264.
#
# ENCODE_PRESET: slow = better compression, same CRF quality, ~2× encode time.
# Use 'medium' on slower machines, 'slow' or 'slower' on fast ones.
# All encodes run at night so 'slow' is the right default.
#
CRF_SUNRISE=28           # daily_sunrise_video.sh   — daily Mattermost upload (H.264)
CRF_SEASONS_RAW=28       # 4-seasons.sh             — raw concat before speed-adjust (H.264)
CRF_SEASONS_FINAL=26     # 4-seasons.sh             — final daily clip (goes into montage) (H.264)
CRF_MONTAGE=28           # montage-mvt.sh           — intermediate concat + sped steps (H.264)
CRF_MONTAGE_FINAL=22     # montage-mvt.sh           — final archive montage (H.265)
ENCODE_PRESET=slow       # ffmpeg preset for all encodes (slow/medium/fast)
AUDIO_BITRATE=192k       # montage-mvt.sh           — music track on movement montages

# ── Frame validation (4-seasons.sh) ──────────────────────────────────────────
# Empty (0-byte) frames are always skipped.  No config needed for that.
#
# SEASONS_GREY_STDDEV_MIN / SEASONS_GREY_DARK_FLOOR — optional bad-signal filter.
# Catches uniform-colour frames caused by a bad RTSP signal: solid green, grey, etc.
# These are valid JPEGs but contain no real image content.
# Uncomment both lines to enable.  A frame is dropped only when BOTH are true:
#   1. pixel standard deviation (0–255) < SEASONS_GREY_STDDEV_MIN  (frame is uniform)
#   2. mean brightness (0–255)          > SEASONS_GREY_DARK_FLOOR  (frame is not dark)
# Night frames are dark so they always pass even if stddev is low.
# Requires ImageMagick (convert).  Start with these values and tune from there:
SEASONS_GREY_STDDEV_MIN=5    # skip if stdev < 5 (very uniform colour)
SEASONS_GREY_DARK_FLOOR=30   # …but only if mean brightness > 30 (not a night frame)
#
# Performance: ImageMagick is only called on files below SEASONS_LARGE_FRAME_BYTES.
# Files above that threshold are always good and skip the check entirely.
# Default 1 MB — adjust if your camera produces larger bad-signal frames.
#SEASONS_LARGE_FRAME_BYTES=1048576

# ── Montage attribution overlay ───────────────────────────────────────────────
# A translucent bar across the top of each movement montage, naming the
# music source ("The Four Seasons — Antonio Vivaldi ...").
# Appears for MONTAGE_ATTR_DUR seconds from the start, with ATTR_FADE-second
# fade in and fade out.  FADE_DUR controls the video/audio fade in/out at
# the very start and very end of the montage.
#
MONTAGE_FADE_DUR=2.0   # video + audio fade in/out (seconds)
MONTAGE_ATTR_DUR=6     # attribution overlay total duration (seconds)
MONTAGE_ATTR_FADE=1    # attribution fade-in and fade-out length (seconds)

# ── Music loop multiplier ─────────────────────────────────────────────────────
# Short movements (especially Mvt 2 adagios) give each day only 3-5 seconds of
# screen time.  Looping the music N times multiplies the per-day target so days
# are less compressed and more watchable.  Per-movement overrides take the form
# MONTAGE_MUSIC_LOOPS_<Season>_<MvtNum>.
#
# Recommended starting point based on movement durations:
#   Summer Mvt 2 (107s) → 3×   Winter Mvt 2 (132s) → 3×
#   Autumn Mvt 2 (152s) → 2×   Summer Mvt 3 (159s) → 2×
#   Spring Mvt 2 (171s) → 2×   others 1× (already ≥10 s/day)
#
MONTAGE_MUSIC_LOOPS=1              # default for all movements
MONTAGE_MUSIC_LOOPS_Summer_2=3
MONTAGE_MUSIC_LOOPS_Winter_2=3
MONTAGE_MUSIC_LOOPS_Autumn_2=2
MONTAGE_MUSIC_LOOPS_Summer_3=2
MONTAGE_MUSIC_LOOPS_Spring_2=2

# ── Direct RTSP capture (replaces MotionEye / any NVR) ────────────────────────
# capture.sh pulls frames directly from each camera's RTSP stream.
# No NVR software required — just ffmpeg and the camera's stream URL.
#
# Per-camera RTSP URL: CAM_RTSP_<cam>=rtsp://user:pass@host:port/path
# Find the URL in your camera's web UI (usually under Network → Video → RTSP)
# or check your camera's manual.
#
# CAM_RTSP_<cam> goes in .env (see bottom of this file), not here.

# Seconds between captured frames (applies to all cameras).
# Lower = smoother timelapse + larger storage footprint:
#   10 s →  8,640 frames/day ~2.5 GB/day     (default, good balance)
#    5 s → 17,280 frames/day ~5 GB/day        (smoother motion)
#    2 s → 43,200 frames/day ~12 GB/day       (very smooth, high storage)
# CAPTURE_STALE_SECS should always be at least 2× CAPTURE_INTERVAL.
CAPTURE_INTERVAL=10

# Per-camera overrides — uncomment and set to override the global value above.
# Useful when cameras serve different purposes (e.g. south records ambient audio
# so fewer frames is fine; north faces a busy scene and benefits from 5s).
#CAPTURE_INTERVAL_east=10
#CAPTURE_INTERVAL_north=10
#CAPTURE_INTERVAL_south=30

# Seconds without a new frame before the watchdog sends a stall notification.
# A recovery notification fires automatically when capture resumes.
# Must always be at least 2× the effective CAPTURE_INTERVAL for that camera.
CAPTURE_STALE_SECS=500

# ── Sunrise audio capture ──────────────────────────────────────────────────────
# Records the camera's RTSP audio stream during the sunrise window so that
# daily_sunrise_video.sh can mix in natural ambient sound (birds, rain, wind)
# at real speed, while the video plays as the sped-up timelapse.
# The audio file is deleted automatically after it is mixed into the video.
#
AUDIO_ENABLED=true           # set true if your camera has a working mic
CAPTURE_AUDIO_BITRATE=96k     # bitrate for the sunrise audio recording
# Audio is recorded for exactly SUNRISE_TARGET_SECS, centred on actual sunrise:
# floor(TARGET/2) seconds before, ceil(TARGET/2) after (odd second → post-sunrise).
# Clips are saved to AUDIO_DIR/sunrise/<cam>/YYYY-MM-DD/sunrise-audio.m4a.
# After mixing into the video the clip is kept for SUNRISE_AUDIO_RETENTION_DAYS, then deleted.
SUNRISE_AUDIO_RETENTION_DAYS=7

# ── Ambient audio library ──────────────────────────────────────────────────────
# Continuously records natural sounds (birds, rain, wind) from AMBIENT_CAMS to
# build a reusable audio library.  Runs as a permanent systemd service alongside
# capture.sh.  Camera audio is 8 kHz mono (phone quality) — enough for nature
# sounds and white-noise style playback.
#
AMBIENT_ENABLED=false
AMBIENT_CAMS=(south)                    # cameras to record from
AMBIENT_CHUNK_SECS=1800                 # seconds per file (default 30 min)
AMBIENT_BITRATE=96k                     # AAC bitrate; 64–96k is plenty at 8 kHz
# Retention — global default, then optional per-camera overrides.
# Uncomment and set per-cam lines to keep different cameras for different durations.
AMBIENT_RETENTION_DAYS=30              # global default; 0 = keep forever
#AMBIENT_RETENTION_DAYS_east=14
#AMBIENT_RETENTION_DAYS_north=30
#AMBIENT_RETENTION_DAYS_south=60       # keep south longer for nature sound library

# ── Moon jobs (nightly tracker + monthly phase close-ups) ────────────────────
# All moon jobs operate on the SUNRISE_CAM (the east-facing camera that already
# has a clear view of the eastern sky).  They share three Python helpers
# (moon_phase.py, moon_detect.py, moon_composite.py) and one cached lunar
# reference texture downloaded by install.sh.
#
#   moon-track.sh             nightly batch — detects the moon in each frame,
#                             crops a 480×480 box around it, stitches the
#                             tracked sequence into an mp4.  Output:
#                             $MOVIES_DIR/<cam>/moon-track/YYYY/YYYY-MM-DD-moon-track.mp4
#
#   moon-phase-monthly.sh     daily check; runs whichever phase composite is
#                             due today.  Three phases handled:
#                               🌕 Full Moon          posts D + MOON_FULL_POST_DELAY_DAYS
#                               🌓 First Quarter      posts D + MOON_QUARTER_POST_DELAY_DAYS
#                               🌗 Third Quarter      posts D + MOON_QUARTER_POST_DELAY_DAYS
#                             East acts as the WITNESS — it confirms the moon
#                             was actually visible in your sky during the
#                             collection window and supplies the timestamp.
#                             The image itself is a NASA SVS Dial-a-Moon
#                             render for that exact UTC hour, sized to fill
#                             the frame on a black background (like the look
#                             of a long-telephoto shot).  Output:
#                             $MOVIES_DIR/<cam>/full-moons/YYYY-MM-full.jpg
#                             $MOVIES_DIR/<cam>/first-quarter/YYYY-MM-first-quarter.jpg
#                             $MOVIES_DIR/<cam>/third-quarter/YYYY-MM-third-quarter.jpg
#
# Honest-by-design: a 38-px white blob from a wide-field IP camera cannot be
# enhanced into crater detail.  The image you see in Mattermost is a NASA
# render for the exact moment east captured the moon — the strongest possible
# match for what your sky actually looked like, with full real-physics
# crater shadows, libration, and phase.  East's role is verifying that you
# had a clear view of the moon that night.
#
# Geometry caveat: east only sees the eastern sky.  At first quarter the moon
# is up only from noon to midnight, transiting south at sunset, so east only
# catches it during DAYTIME.  The brightness-based detector often fails on
# daytime moon shots — first quarter is best-effort.  Full moon and third
# quarter both rise after dark and stay in east's view; those should land
# cleanly most months.
#
# Toggles (any can be disabled independently):
MOON_TRACK_ENABLED=true
MOON_FULL_ENABLED=true
MOON_FIRST_QUARTER_ENABLED=true    # set false if daytime-detection misses are noisy
MOON_THIRD_QUARTER_ENABLED=true

# Set false to skip east verification entirely and post the NASA render for
# the exact phase moment regardless of clouds / camera outage.  Default true
# means "only post when east actually saw the moon that month."
MOON_REQUIRE_EAST_VERIFY=true

# Nightly tracker tuning ──────────────────────────────────────────────────────
MOON_TRACK_CROP_PX=480             # pixels — box size around the moon (source coords)
MOON_TRACK_FPS=12                  # output mp4 framerate
MOON_TRACK_CRF=24                  # output mp4 CRF
MOON_TRACK_RETENTION_DAYS=90       # delete tracker mp4s older than this; 0 = forever

# Dark-sky observation window ─────────────────────────────────────────────────
# The script searches ±24h around the exact phase moment using actual computed
# sunset and sunrise times for the configured location.  The dark window for
# each night starts at (sunset + MOON_DARK_START_MIN) and ends at sunrise.
# Within that window, only frames where the moon is above MOON_MIN_ALTITUDE_DEG
# are considered.
#
# The east camera faces east, so the moon is visible to it from moonrise through
# roughly south — typically from dusk through midnight for a full moon.
# MOON_DARK_START_MIN=30 means the script starts looking 30 min after the sun
# sets, when the sky is dark enough for a clean moon shot but east can still
# catch the moon low on the eastern horizon.
#
# Of all qualifying frames, the one temporally closest to the exact phase moment
# is used (not the first one).  This picks the frame when the moon was most
# precisely full / at quarter.  Its timestamp drives the NASA Dial-a-Moon fetch
# and the parallactic angle rotation; the caption shows illumination% at that
# moment.  If no clear frame is found, the month is skipped entirely.
#
# If the phase falls early in the day (e.g. 01:30 local), the ±24h window
# covers the previous evening through the following dusk — both nights where
# the moon is essentially full.  If the phase falls just before midnight
# (e.g. 23:55), both the same evening and the next morning are included.
MOON_DARK_START_MIN=30

# Post delay ──────────────────────────────────────────────────────────────────
# How many days after the exact phase to run the post.  The post delay gives
# time for the obs-night frames to land on disk before the job runs.
MOON_FULL_POST_DELAY_DAYS=1         # post the morning after the full moon
MOON_QUARTER_POST_DELAY_DAYS=1      # post the morning after each quarter
MOON_QUARTER_MIN_ILLUMINATION=0.46
MOON_QUARTER_MAX_ILLUMINATION=0.54

# Frame-acceptance thresholds — a candidate must beat all three to qualify.
# Lower = more permissive (accept hazier nights / lower moon).  If you find
# the script never finds a clear shot, loosen these.
MOON_MIN_QUALITY=0.55              # 0..1 from moon_detect (roundness × halo × isolation)
MOON_MIN_ALTITUDE_DEG=15           # below this the moon is in trees / on the horizon
MOON_FULL_MIN_ILLUMINATION=0.96    # ±4% of 100%: accept 96–100% illumination for full moon

# Output frame.  Default 1920×1080 to match the sunrise videos.
MOON_OUTPUT_W=1920
MOON_OUTPUT_H=1080
MOON_HEIGHT_PCT=0.92               # moon disk fills this fraction of frame height (full-screen feel)

# NASA SVS Dial-a-Moon ────────────────────────────────────────────────────────
# Hourly pre-rendered moon images, free, public domain, real physics
# (correct phase, libration, crater shadows for any UTC hour).
# https://svs.gsfc.nasa.gov/api/dialamoon/<ISO-DATE>
# We hit it once per phase event (~36 calls/year), cache the result forever.
#MOON_DIALAMOON_API=https://svs.gsfc.nasa.gov/api/dialamoon
#MOON_DIALAMOON_CACHE_DIR="$SCRIPT_DIR/moon-ref/dialamoon"
MOON_DIALAMOON_TARGET_PX=2048      # cached PNG longest side; downsampled on save
MOON_DIALAMOON_TIMEOUT_SEC=30

# ── Mattermost — daily sunrise upload ─────────────────────────────────────────
# mattermost_url, access_token, channel_id go in .env (see bottom of this file).

# ── Notifications — montage / year-end complete + any job failure ─────────────
# Notifications fire when a movement montage or the year video finishes,
# and via systemd OnFailure= if any daily job fails.
# Uncomment and configure one or more methods to enable.

# ntfy — push notifications, zero signup for self-hosted or free cloud tier:
#   Self-hosted: https://docs.ntfy.sh/install/
#   Cloud: pick any topic name at ntfy.sh (no account needed)
#   Set NTFY_URL=https://ntfy.sh/your-topic in .env, then flip the toggle below.
NTFY_ENABLED=true
NTFY_URL="${NTFY_URL:-}"

# Email — requires the 'mail' command (package: mailutils or s-nail).
# Configure outbound SMTP via /etc/ssmtp/ssmtp.conf or msmtp.
#   Set EMAIL_TO and EMAIL_FROM in .env, then flip the toggle below.
EMAIL_ENABLED=false
EMAIL_TO="${EMAIL_TO:-}"
EMAIL_FROM="${EMAIL_FROM:-skycam@localhost}"

# Mattermost text post — reuses mattermost_url and access_token above.
# Can be the same daily channel or a separate admin/private channel.
#   Set MM_NOTIFY_CHANNEL_ID in .env, then flip the toggle below.
MM_NOTIFY_ENABLED=false
MM_NOTIFY_CHANNEL_ID="${MM_NOTIFY_CHANNEL_ID:-}"

# ── Credentials (.env override) ───────────────────────────────────────────────
# Sensitive values (RTSP URLs with passwords, API tokens) can be kept out of
# this file — and out of git — by placing them in a .env file in the same
# directory.  install.sh generates .env.example showing exactly which variables
# to define for your camera list.
#
# To use:
#   cp .env.example .env
#   $EDITOR .env          ← fill in real values
#   (never commit .env)
#
_conf_dir="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
[ -f "$_conf_dir/.env" ] && source "$_conf_dir/.env"
unset _conf_dir
