#!/usr/bin/env bash

# This script downloads the current version (as defined by android-version-name.txt) from
# release.mullvad.net and verify that the signature.
# It then extract the changelog entries for that version and uploads it to github with the
# apk file and the signature.

set -eu

SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
cd "$SCRIPT_DIR"

REPO_ROOT=../../../
PRODUCT_VERSION_PATH=$REPO_ROOT/dist-assets/android-version-name.txt
PRODUCT_VERSION=$(cat $PRODUCT_VERSION_PATH)
CHANGELOG_PATH=$REPO_ROOT/android/CHANGELOG.md

$REPO_ROOT/scripts/utils/gh-ready-check
$REPO_ROOT/scripts/utils/commit-verification
"$SCRIPT_DIR/verify-version-is-release"

# shellcheck source=desktop/scripts/release/release-config.sh
source "$SCRIPT_DIR/release-config.sh"
source $REPO_ROOT/scripts/utils/log

function cleanup {
    log "Cleaning up temp artifact dir..."
    rm -rf -- "$ARTIFACT_DIR"
}

function setup {
    # We must provide a template for mktemp to work properly on macOS.
    ARTIFACT_DIR=$(mktemp -d -t artifact-XXX)

    export ARTIFACT_DIR

    log_header "Artifact directory"
    log_info "artifact dir: $ARTIFACT_DIR"
}

function publish_release {
    log_header "Parse changelog"

    # For stable versions, include all changelog entries for all beta versions since the last stable version.
    changelog_end_version_pattern="android\/20[0-9]\{2\}\.[0-9]\{1,2\}"
    if [[ $PRODUCT_VERSION == *-beta* ]]; then
        changelog_end_version_pattern=".*"
    fi

    changelog_extract=$(sed -n "/^## \[android\/$PRODUCT_VERSION\]/,/^## \[$changelog_end_version_pattern\]/p" "$CHANGELOG_PATH")

    changelog=$(echo "$changelog_extract" | sed '$d' | \
        awk 'NF { last = last ? last ORS $0 : $0 } END { print last }')

    release_flags=(
      --repo "git@github.com:mullvad/mullvadvpn-app"
      --verify-tag
      --notes-file -
      --title "android/$PRODUCT_VERSION"
      --draft
    )

    previous_release=$(echo "$changelog_extract" | tail -1 | awk -F'[][]' '/^## \[/{print $2}')

    if [[ $PRODUCT_VERSION == *-beta* ]]; then
        release_flags+=(--prerelease)
    else
        body+="Here is a list of all changes since last stable release [$previous_release](https://github.com/mullvad/mullvadvpn-app/releases/tag/$previous_release):"
        release_flags+=(--latest)
    fi

    version_count=$(echo "$changelog" | grep -cE '^## \[android\/[0-9]+\.[0-9]+(-beta[0-9]+)?\] - [0-9]{4}-[0-9]{2}-[0-9]{2}')
    if [ "$version_count" -eq 1 ]; then
        changelog=$(echo "$changelog" | tail -n +2)
    fi

    body+="\n$changelog"

    read -rp "The suggested changelog will be opened in an editor, please finalize and save it before exiting. Press enter to open changelog..."

    tmp_changelog_file=$(mktemp -t changelog-XXX)
    {
      printf "%b" "$body"
      printf "%b" "\n\n<!--\nThe following artifacts will be included:\n"
      # shellcheck disable=SC2012
      ls -lh "$ARTIFACT_DIR" | tail -n +2 | awk '{print $9,"( Size:",$5,")"}'
      echo "-->"
    } > "$tmp_changelog_file"

    "${EDITOR:-"vim"}" "$tmp_changelog_file"

    log_header "Creating GitHub release"
    # shellcheck disable=SC2046
    gh release create "${release_flags[@]}" "android/$PRODUCT_VERSION" $(printf "%s " "$ARTIFACT_DIR"/*) < "$tmp_changelog_file"

    rm tmp_changelog_file
}

trap cleanup EXIT
setup
echo "$PRODUCT_VERSION"
./download-release-artifacts "$PRODUCT_VERSION" "$ARTIFACT_DIR"
publish_release