#!/usr/bin/env bats
# Tests for scripts/monitor/log-metrics.sh — metric collection

load test_helper.sh

setup() {
    source_lib common.sh
    OUTPUT_FILE="$(mktemp)"
}

teardown() {
    rm -f "$OUTPUT_FILE"
}

@test "log-metrics: produces CSV with correct header" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --duration 2 --interval 1 --output "$OUTPUT_FILE"
    assert_success
    head -1 "$OUTPUT_FILE" | grep -q "timestamp,gpu_busy_pct,vram_used_mib,gtt_used_mib,gpu_temp_c,gpu_power_w,cpu_pct,ram_used_mib"
}

@test "log-metrics: produces at least 1 data row in 3 seconds" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --duration 3 --interval 1 --output "$OUTPUT_FILE"
    assert_success
    local lines
    lines=$(wc -l < "$OUTPUT_FILE")
    (( lines >= 2 ))  # header + at least 1 data row
}

@test "log-metrics: data rows have 8 comma-separated fields" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --duration 3 --interval 1 --output "$OUTPUT_FILE"
    assert_success
    local row
    row=$(sed -n '2p' "$OUTPUT_FILE")
    [ -n "$row" ]  # ensure a data row exists
    local field_count
    field_count=$(echo "$row" | awk -F, '{print NF}')
    [ "$field_count" -eq 8 ]
}

@test "log-metrics: rejects non-numeric interval" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --interval abc --duration 1 --output "$OUTPUT_FILE"
    assert_failure
    assert_output --partial "positive integer"
}

@test "log-metrics: rejects non-numeric duration" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --duration abc --interval 1 --output "$OUTPUT_FILE"
    assert_failure
    assert_output --partial "positive integer"
}

@test "log-metrics: creates output file in specified path" {
    local custom_dir
    custom_dir="$(mktemp -d)"
    local custom_output="$custom_dir/custom-metrics.csv"
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --duration 2 --interval 1 --output "$custom_output"
    assert_success
    [ -f "$custom_output" ]
    rm -rf "$custom_dir"
}

@test "log-metrics: warns on unknown argument" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --bogus-flag --duration 1 --interval 1 --output "$OUTPUT_FILE"
    assert_success  # script continues despite unknown arg
    assert_output --partial "Unknown argument"
}

@test "log-metrics: shows help with --help" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" --help
    assert_success
    assert_output --partial "Usage"
}

@test "log-metrics: timestamp column has valid datetime format" {
    run bash "$PROJECT_ROOT/scripts/monitor/log-metrics.sh" \
        --duration 2 --interval 1 --output "$OUTPUT_FILE"
    assert_success
    local ts
    ts=$(sed -n '2p' "$OUTPUT_FILE" | cut -d, -f1)
    [[ "$ts" =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}\ [0-9]{2}:[0-9]{2}:[0-9]{2}$ ]]
}