#!/bin/sh

# Configuration
LOADER="https://dev.azure.com/EverestAPI/Everest/_apis/build/builds?api-version=7.0"
BRANCH="stable"

# Output
RST="\033[0;00m"
RED="\033[0;31m"
RDB="\033[1;31m"

# Required
for pkg in curl jq unzip rsync mono; do
  if ! command -v "$pkg" > /dev/null; then
    printf "%b\n" "${RDB}error${RST}: package '${RED}$pkg${RST}' not found"
    exit 1
  fi
done

# Celeste
if [ ! -f Celeste.exe ]; then
  printf "%b\n" "${RDB}error${RST}: executable '${RED}$(realpath Celeste.exe)${RST}' not found"
  exit 1
fi

# Everest
if command -v nc > /dev/null; then
  if ! nc -z -w 10 "$(printf "%s" "$LOADER" |
    sed "s#https://##g" | cut -d / -f 1)" 443 > /dev/null 2>&1; then
    printf "%b\n" "${RDB}error${RST}: server '${RED}$LOADER${RST}' not available"
    exit 1
  fi
fi

# Setup
CACHE=$(mktemp -d "${XDG_RUNTIME_DIR:-/tmp}/everest-XXXXXXXXX")
trap "rm -rf '$CACHE'; exit 1" 1 2 3 6 15

# Parse
parse() {
  if [ "$(printf "%s" "$1" | sed "s#refs/heads/##g")" != "$BRANCH" ]; then
    return 1
  elif [ "$2" != completed ]; then
    return 1
  elif [ "$3" != succeeded ]; then
    return 1
  elif [ "$4" != manual ] && [ "$4" != individualCI ]; then
    return 1
  else
    return 0
  fi
}

# Process
curl -sL "$LOADER" | jq -r '.value[] | .sourceBranch + " " + .status + " "
  + .result + " " + .reason + " " + (.id|tostring)' | while read -r json; do
  # Parse
  if parse $json; then
    # Setup
    EVEREST=$(printf "%s" "$LOADER" | cut -d \? -f 1)
    VERSION=$(printf "%s" "$json" | cut -d " " -f 5)
    ARCHIVE="$EVEREST/$VERSION/artifacts?artifactName=main&api-version=7.0&%24format=zip"

    # Download
    curl -sL "$ARCHIVE" -o "$CACHE/everest.zip"
    break
  fi
done

# Extract
if [ -f "$CACHE/everest.zip" ]; then
  unzip "$CACHE/everest.zip" -d "$CACHE" > /dev/null 2>&1
else
  rm -rf "$CACHE"
  printf "%b\n" "${RDB}error${RST}: archive '${RED}$CACHE/everest.zip${RST}' not found"
  exit 1
fi

# Replace
if [ -d "$CACHE/main" ]; then
  rsync -aAX --checksum "$CACHE/main/" ./
else
  rm -rf "$CACHE"
  printf "%b\n" "${RDB}error${RST}: directory '${RED}$CACHE/main${RST}' not found"
  exit 1
fi

# Destroy
rm -rf "$CACHE"

# Patch
if [ -f MiniInstaller.exe ]; then
  mono MiniInstaller.exe
else
  printf "%b\n" \
    "${RDB}error${RST}: executable '${RED}$(realpath MiniInstaller.exe)${RST}' not found"
  exit 1
fi

# Close
exit 0