#!/usr/bin/env bash
# Submit RECCoon to F-Droid by opening a merge request against fdroiddata.
#
# It needs a GitLab Personal Access Token with the "api" scope:
#   1. Create/account:  https://gitlab.com/users/sign_up
#   2. Create a token:  https://gitlab.com/-/user_settings/personal_access_tokens
#      name it "fdroid-submit", tick the "api" scope, then copy the glpat-... value.
#   3. Save it locally (never commit it):
#        mkdir -p ~/.config
#        printf '%s' 'glpat-...' > ~/.config/gitlab-token
#        chmod 600 ~/.config/gitlab-token
#   4. Run:  ./tools/submit-to-fdroid.sh
#
# The script forks fdroid/fdroiddata, adds metadata/com.tomcooks.reccoon.yml on a
# branch, and opens the merge request. It is safe to run more than once.
set -euo pipefail

API="https://gitlab.com/api/v4"
UPSTREAM_PATH="fdroid%2Ffdroiddata"
BRANCH="reccoon-1.0.0"
FILE_PATH="metadata/com.tomcooks.reccoon.yml"
FILE_PATH_ENC="metadata%2Fcom.tomcooks.reccoon.yml"
HERE="$(cd "$(dirname "$0")" && pwd)"
SOURCE_YAML="$HERE/../f-droid/com.tomcooks.reccoon.yml"

TOKEN="${GITLAB_TOKEN:-}"
if [ -z "$TOKEN" ] && [ -f "$HOME/.config/gitlab-token" ]; then
    TOKEN="$(tr -d '\r\n' < "$HOME/.config/gitlab-token")"
fi
if [ -z "$TOKEN" ]; then
    echo "No GitLab token found. See the comment at the top of this script." >&2
    exit 1
fi
if [ ! -f "$SOURCE_YAML" ]; then
    echo "Missing $SOURCE_YAML" >&2
    exit 1
fi

gl() { curl -sf -H "PRIVATE-TOKEN: $TOKEN" "$@"; }

USERNAME="$(gl "$API/user" | jq -r .username)"
UPSTREAM_ID="$(gl "$API/projects/$UPSTREAM_PATH" | jq -r .id)"
echo "Authenticated as @$USERNAME (upstream id $UPSTREAM_ID)"

echo "==> Forking fdroid/fdroiddata (no-op if it already exists)"
curl -s -o /dev/null -H "PRIVATE-TOKEN: $TOKEN" -X POST \
    "$API/projects/$UPSTREAM_PATH/fork" || true

FORK_ID=""
for _ in $(seq 1 40); do
    FORK_ID="$(gl "$API/projects/$USERNAME%2Ffdroiddata" 2>/dev/null | jq -r .id 2>/dev/null || true)"
    if [ -n "$FORK_ID" ] && [ "$FORK_ID" != "null" ]; then
        break
    fi
    sleep 3
done
if [ -z "$FORK_ID" ] || [ "$FORK_ID" = "null" ]; then
    echo "Fork did not become ready in time." >&2
    exit 1
fi
echo "    fork id: $FORK_ID"

echo "==> Creating branch $BRANCH"
curl -s -o /dev/null -H "PRIVATE-TOKEN: $TOKEN" -X POST \
    "$API/projects/$FORK_ID/repository/branches?branch=$BRANCH&ref=master" || true

echo "==> Writing $FILE_PATH"
BODY="$(jq -n --arg b "$BRANCH" --arg c "$(cat "$SOURCE_YAML")" \
    '{branch:$b, content:$c, commit_message:"Add RECCoon 1.0.0 build metadata"}')"
CODE="$(curl -s -o /tmp/fdroid-file.json -w '%{http_code}' \
    -H "PRIVATE-TOKEN: $TOKEN" -H 'Content-Type: application/json' \
    -X POST "$API/projects/$FORK_ID/repository/files/$FILE_PATH_ENC" -d "$BODY")"
if [ "$CODE" = "201" ]; then
    echo "    created"
elif [ "$CODE" = "400" ] && grep -q "already exists" /tmp/fdroid-file.json; then
    echo "    already present"
else
    echo "    unexpected response (HTTP $CODE):" >&2
    cat /tmp/fdroid-file.json >&2
    exit 1
fi

echo "==> Opening merge request"
MR_BODY="$(jq -n --arg b "$BRANCH" --argjson up "$UPSTREAM_ID" \
    '{source_branch:$b, target_branch:"master", target_project_id:$up,
      title:"New app: RECCoon (com.tomcooks.reccoon)",
      description:"Adds metadata for RECCoon, an offline audio recorder with on-device Parakeet transcription.\n\n- Source: https://git.tomcooks.com/reccoon\n- License: GPL-3.0-or-later\n- Gradle build; the sherpa-onnx runtime is fetched from JitPack\n- Fastlane metadata and the v1.0.0 tag are in the repository"}')"
MR_CODE="$(curl -s -o /tmp/fdroid-mr.json -w '%{http_code}' \
    -H "PRIVATE-TOKEN: $TOKEN" -H 'Content-Type: application/json' \
    -X POST "$API/projects/$FORK_ID/merge_requests" -d "$MR_BODY")"
if [ "$MR_CODE" = "201" ]; then
    echo "    merge request: $(jq -r .web_url /tmp/fdroid-mr.json)"
else
    echo "    response (HTTP $MR_CODE):" >&2
    cat /tmp/fdroid-mr.json >&2
    exit 1
fi