#!/usr/bin/env bash

set -euo pipefail

readonly REPOSITORY="lutinglt/gitea-github-theme"
readonly SCRIPT_DIRECTORY="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"

usage() {
  printf 'Usage: %s <gitea-version> <custom-path>\n' "${0##*/}" >&2
  printf 'Example: %s 1.27.0 "$(gitea help | awk '\''/CustomPath:/ {print $2}'\'')"\n' "${0##*/}" >&2
  exit 2
}

require_command() {
  command -v "$1" >/dev/null 2>&1 || {
    printf 'Required command not found: %s\n' "$1" >&2
    exit 1
  }
}

[[ $# -eq 2 ]] || usage

gitea_version="$1"
custom_path="$2"

if [[ -z "$custom_path" || "$custom_path" == *$'\n'* ]]; then
  printf 'CustomPath must be exactly one non-empty path.\n' >&2
  exit 1
fi
manifest_path="$("$SCRIPT_DIRECTORY/install-gitea-github-theme.sh" --print-manifest-path \
  "$custom_path/public/assets/css" "$custom_path/templates")"

# Move manifests written by earlier script versions out of CustomPath before Gitea dump scans it.
for legacy_manifest in \
  "$custom_path/.gitea-github-theme-files" \
  "$custom_path/templates/.gitea-github-theme-files"; do
  if [[ -f "$legacy_manifest" && ! -e "$manifest_path" ]]; then
    mkdir -p "$(dirname "$manifest_path")"
    mv -- "$legacy_manifest" "$manifest_path"
    printf 'Moved theme manifest to %s.\n' "$manifest_path"
    break
  fi
done

if [[ ! "$gitea_version" =~ ^v?([0-9]+\.[0-9]+) ]]; then
  printf 'Unable to determine major.minor from Gitea version: %s\n' "$gitea_version" >&2
  exit 1
fi
release_prefix="v${BASH_REMATCH[1]}."

require_command curl
require_command jq

theme_version="$(
  curl --connect-timeout 10 --fail --silent --show-error --location \
    "https://api.github.com/repos/${REPOSITORY}/releases" \
    | jq -r --arg prefix "$release_prefix" '
        [ .[]
          | select(.prerelease == false and (.tag_name | startswith($prefix)))
          | .tag_name
        ]
        | first // empty
      '
)"

if [[ -z "$theme_version" ]]; then
  printf 'No stable %s* theme release was found; removing any installed matching theme files.\n' "$release_prefix" >&2
  exec "$SCRIPT_DIRECTORY/install-gitea-github-theme.sh" --remove \
    "$custom_path/public/assets/css" \
    "$custom_path/templates" \
    "$manifest_path"
fi

exec "$SCRIPT_DIRECTORY/install-gitea-github-theme.sh" \
  "$theme_version" \
  "$custom_path/public/assets/css" \
  "$custom_path/templates" \
  "$manifest_path"