#!/usr/bin/env bash
set -euo pipefail

PROJECT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
TEST_ROOT="$(mktemp -d)"
trap 'rm -rf "$TEST_ROOT"' EXIT

FIXTURE_REPO="$TEST_ROOT/repo"
TEST_HOME="$TEST_ROOT/home"
mkdir -p "$FIXTURE_REPO/skills-dev/example-plugin/.claude-plugin"
mkdir -p "$FIXTURE_REPO/skills-dev/example-plugin/skills/references"
mkdir -p "$TEST_HOME"
cp "$PROJECT_DIR/install-skills.sh" "$FIXTURE_REPO/install-skills.sh"

write_manifest() {
  local plugin="$1" name="$2" version="$3"
  mkdir -p "$FIXTURE_REPO/skills-dev/${plugin}-plugin/.claude-plugin"
  cat > "$FIXTURE_REPO/skills-dev/${plugin}-plugin/.claude-plugin/plugin.json" <<JSON
{"name":"${plugin}-plugin","version":"${version}","install_name":"${name}","install_type":"skill","dir_category":"dev"}
JSON
}

write_manifest example example 1.0.0
cat > "$FIXTURE_REPO/skills-dev/example-plugin/skills/SKILL.md" <<'EOF'
---
name: example
description: Installer fixture version one.
---
version one
EOF
printf 'reference one\n' > "$FIXTURE_REPO/skills-dev/example-plugin/skills/references/guide.md"

HOME="$TEST_HOME" "$FIXTURE_REPO/install-skills.sh" >/dev/null
test -f "$TEST_HOME/.claude/skills/example/references/guide.md"

# A repository version upgrade replaces an unchanged prior install.
write_manifest example example 2.0.0
cat > "$FIXTURE_REPO/skills-dev/example-plugin/skills/SKILL.md" <<'EOF'
---
name: example
description: Installer fixture version two.
---
version two
EOF
HOME="$TEST_HOME" "$FIXTURE_REPO/install-skills.sh" >/dev/null
grep -q 'version two' "$TEST_HOME/.claude/skills/example/SKILL.md"
grep -q '"version": "2.0.0"' "$TEST_HOME/.claude/.installed-skills.json"

# A local edit is preserved even when the repository advances again.
printf 'local edit\n' >> "$TEST_HOME/.claude/skills/example/SKILL.md"
write_manifest example example 3.0.0
printf 'repository version three\n' >> "$FIXTURE_REPO/skills-dev/example-plugin/skills/SKILL.md"
output="$(HOME="$TEST_HOME" "$FIXTURE_REPO/install-skills.sh")"
grep -q 'local files were modified' <<<"$output"
grep -q 'local edit' "$TEST_HOME/.claude/skills/example/SKILL.md"
if grep -q 'repository version three' "$TEST_HOME/.claude/skills/example/SKILL.md"; then
  echo 'local modification was overwritten' >&2
  exit 1
fi

# Legacy SKILL.md-only installs gain missing repository resources when their
# existing content is an unchanged subset of the source.
write_manifest legacy legacy 1.0.0
mkdir -p "$FIXTURE_REPO/skills-dev/legacy-plugin/skills/references"
cat > "$FIXTURE_REPO/skills-dev/legacy-plugin/skills/SKILL.md" <<'EOF'
---
name: legacy
description: Legacy installation fixture.
---
legacy content
EOF
printf 'legacy reference\n' > "$FIXTURE_REPO/skills-dev/legacy-plugin/skills/references/guide.md"
mkdir -p "$TEST_HOME/.claude/skills/legacy"
cp "$FIXTURE_REPO/skills-dev/legacy-plugin/skills/SKILL.md" "$TEST_HOME/.claude/skills/legacy/SKILL.md"
HOME="$TEST_HOME" "$FIXTURE_REPO/install-skills.sh" >/dev/null
test -f "$TEST_HOME/.claude/skills/legacy/references/guide.md"

echo 'install-skills tests passed'