#!/usr/bin/env bash
# Regression harness for Gitea PR metadata normalization.

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
WORK_DIR="${MOSAIC_TEST_WORK_DIR:-$PWD/.mosaic-test-work/pr-metadata-gitea}"
REPO_DIR="$WORK_DIR/repo"
FIXTURE_DIR="$WORK_DIR/fixtures"

rm -rf "$WORK_DIR"
mkdir -p "$REPO_DIR" "$FIXTURE_DIR"

git -C "$REPO_DIR" init -q
git -C "$REPO_DIR" remote add origin https://git.uscllc.com/USC/uconnect.git

cat > "$FIXTURE_DIR/gitea-standard.json" <<'JSON'
{
  "number": 1905,
  "title": "Smoke gate fix",
  "state": "open",
  "user": {"login": "edith"},
  "head": {"ref": "edith/t_39ce717c-authentik-smoke-gate"},
  "base": {"ref": "main"},
  "labels": [{"name": "ci"}],
  "assignees": [{"login": "edith"}],
  "html_url": "https://git.uscllc.com/USC/uconnect/pulls/1905"
}
JSON

cat > "$FIXTURE_DIR/gitea-fallback.json" <<'JSON'
{
  "number": 1908,
  "title": "Fallback branch fields",
  "state": "open",
  "user": {"login": "edith"},
  "head_branch": "fix/fallback-head",
  "base_branch": "main",
  "html_url": "https://git.uscllc.com/USC/uconnect/pulls/1908"
}
JSON

cat > "$FIXTURE_DIR/gitea-refs-pull-label.json" <<'JSON'
{
  "number": 1908,
  "title": "Closed merged PR with synthetic pull ref",
  "state": "closed",
  "user": {"login": "edith"},
  "head": {"ref": "refs/pull/1908/head", "label": "fix/t_23fa9e1d-portal-health-backend"},
  "base": {"ref": "main"},
  "html_url": "https://git.uscllc.com/USC/uconnect/pulls/1908"
}
JSON

cat > "$FIXTURE_DIR/gitea-error.json" <<'JSON'
{"message": "user does not exist [uid: 0, name: ]", "url": "https://git.uscllc.com/api/swagger"}
JSON

run_case() {
    local fixture="$1" expected_number="$2" expected_head="$3"
    local output
    output=$(cd "$REPO_DIR" && MOSAIC_GITEA_PR_METADATA_RAW_FILE="$fixture" "$SCRIPT_DIR/pr-metadata.sh" -n "$expected_number")
    PR_METADATA_OUTPUT="$output" python3 - "$expected_number" "$expected_head" <<'PY'
import json
import os
import sys

data = json.loads(os.environ["PR_METADATA_OUTPUT"])
expected_number = int(sys.argv[1])
expected_head = sys.argv[2]
assert data["number"] == expected_number, data
assert data["baseRefName"] == "main", data
assert data["headRefName"] == expected_head, data
PY
}

run_case "$FIXTURE_DIR/gitea-standard.json" 1905 edith/t_39ce717c-authentik-smoke-gate
run_case "$FIXTURE_DIR/gitea-fallback.json" 1908 fix/fallback-head
run_case "$FIXTURE_DIR/gitea-refs-pull-label.json" 1908 fix/t_23fa9e1d-portal-health-backend

if cd "$REPO_DIR" && MOSAIC_GITEA_PR_METADATA_RAW_FILE="$FIXTURE_DIR/gitea-error.json" "$SCRIPT_DIR/pr-metadata.sh" -n 1909 >/dev/null 2>"$WORK_DIR/error.log"; then
    echo "Expected API error fixture to fail" >&2
    exit 1
fi
grep -q "Gitea API error" "$WORK_DIR/error.log"

echo "Gitea PR metadata regression harness passed"