#!/usr/bin/env bats

setup() {
    REPO_ROOT="$(cd "$BATS_TEST_DIRNAME/../../../../../" && pwd)"
    load "$REPO_ROOT/tests/test_helper/bats-support/load"
    load "$REPO_ROOT/tests/test_helper/bats-assert/load"

    SCRIPT="$(cd "$(dirname "$BATS_TEST_FILENAME")" && pwd)/validate.sh"
    TMPDIR="$(mktemp -d)"

    # Helper: create a minimal valid skill directory
    make_valid_skill() {
        local dir="$1"
        local name
        name="$(basename "$dir")"
        mkdir -p "$dir/scripts"
        cat > "$dir/SKILL.md" <<EOF
---
name: $name
description: A valid skill description that is well within the limit.
---

## Step 1

Do the thing.
EOF
    }
}

teardown() {
    rm -rf "$TMPDIR"
}

# ---------------------------------------------------------------------------
# Passing cases
# ---------------------------------------------------------------------------

@test "passes on a valid minimal skill" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    run bash "$SCRIPT" "$skill"
    assert_success
}

@test "--help exits 0" {
    run bash "$SCRIPT" --help
    assert_success
    assert_output --partial "Usage:"
}

@test "passes when scripts/ directory is absent" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    rmdir "$skill/scripts"
    run bash "$SCRIPT" "$skill"
    assert_success
}

@test "FILL IN: inside backticks does not fail" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    echo "Use \`FILL IN: value\` as an example." >> "$skill/SKILL.md"
    run bash "$SCRIPT" "$skill"
    assert_success
}

@test "passes at exactly 1024-char description" {
    local skill="$TMPDIR/my-skill"
    local name
    name="$(basename "$skill")"
    mkdir -p "$skill"
    local desc
    desc="$(python3 -c "print('x' * 1024)")"
    cat > "$skill/SKILL.md" <<EOF
---
name: $name
description: $desc
---

## Step 1

Do the thing.
EOF
    run bash "$SCRIPT" "$skill"
    assert_success
}

@test "passes at exactly 500 lines" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    local current
    current="$(wc -l < "$skill/SKILL.md")"
    local needed=$(( 500 - current ))
    python3 -c "print('\n' * $needed, end='')" >> "$skill/SKILL.md"
    run bash "$SCRIPT" "$skill"
    assert_success
}

# ---------------------------------------------------------------------------
# Failing cases
# ---------------------------------------------------------------------------

@test "fails when SKILL.md is missing" {
    local skill="$TMPDIR/my-skill"
    mkdir -p "$skill"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when name does not match directory" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    sed -i 's/^name: .*/name: wrong-name/' "$skill/SKILL.md"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when description exceeds 1024 chars" {
    local skill="$TMPDIR/my-skill"
    local name
    name="$(basename "$skill")"
    mkdir -p "$skill"
    local desc
    desc="$(python3 -c "print('x' * 1025)")"
    cat > "$skill/SKILL.md" <<EOF
---
name: $name
description: $desc
---

## Step 1

Do the thing.
EOF
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when SKILL.md exceeds 500 lines" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    python3 -c "print('\n' * 500)" >> "$skill/SKILL.md"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when body contains unfilled FILL IN: placeholder" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    echo "FILL IN: replace this" >> "$skill/SKILL.md"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when a script is not executable" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    echo "#!/usr/bin/env bash" > "$skill/scripts/helper.sh"
    chmod -x "$skill/scripts/helper.sh"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when a script has an interactive prompt" {
    local skill="$TMPDIR/my-skill"
    make_valid_skill "$skill"
    printf '#!/usr/bin/env bash\nread -p "Enter value: " VAL\n' > "$skill/scripts/helper.sh"
    chmod +x "$skill/scripts/helper.sh"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when name contains consecutive hyphens" {
    local skill="$TMPDIR/my--skill"
    make_valid_skill "$skill"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when name has a leading hyphen" {
    local skill="$TMPDIR/-my-skill"
    make_valid_skill "$skill"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when no frontmatter block is present" {
    local skill="$TMPDIR/my-skill"
    mkdir -p "$skill"
    echo "Just some content with no frontmatter." > "$skill/SKILL.md"
    run bash "$SCRIPT" "$skill"
    assert_failure
}

@test "fails when no arguments are given" {
    run bash "$SCRIPT"
    assert_failure
}