// 入队计时含具体编码和外层提交；执行计时含真实生成分派、任务作用域、解码、业务写入和确认。
// 单阶段对照把 claim 放在计时外；完整循环另计入入队、claim、执行和确认。
struct JobInput {
    name: String,
    amount: i64,
    key: String,
}

fn inputs(count: usize) -> Vec<JobInput> {
    (0..count)
        .map(|index| JobInput {
            name: format!("job-{index:04} 中文\""),
            amount: index as i64 % 997,
            key: format!("key-{index:04}"),
        })
        .collect()
}

async fn submit(
    generated: bool,
    input: &JobInput,
    scope: &Scope<'_>,
    registry: &Arc<Registry>,
) -> String {
    let mut database = DbContext::new(registry.clone());
    let owner = database.enter();
    let execution = Execution::System { tenant: None };
    let id = if generated {
        GENERATED_SUBMIT(
            &input.name,
            input.amount,
            &input.key,
            scope,
            &mut database,
            &execution,
        )
        .await
        .unwrap()
    } else {
        rust_submit(
            &input.name,
            input.amount,
            &input.key,
            scope,
            &mut database,
            &execution,
        )
        .await
        .unwrap()
    };
    database.finish(scope, owner, true).await.unwrap();
    id.into_text()
}

async fn execute(
    generated: bool,
    claim: Arc<Claim>,
    scope: &Scope<'_>,
    registry: &Arc<Registry>,
) -> Result<(), JobFailure> {
    let registry = registry.clone();
    let timeout = claim.policy.timeout_ms;
    let outcome = if generated {
        scope
            .spawn(move |child| job_execute(JOB_BINDING, None, claim, child, registry))
            .unwrap()
            .timeout(timeout)
            .await
            .unwrap()
    } else {
        scope
            .spawn(move |child| rust_execute(JOB_BINDING, claim, child, registry))
            .unwrap()
            .timeout(timeout)
            .await
            .unwrap()
    };
    match outcome {
        dever_runtime::task::Timed::Ready(value) => value,
        _ => panic!("benchmark handler timed out"),
    }
}

async fn claims(scope: &Scope<'_>, registry: &Arc<Registry>, count: usize) -> Vec<Arc<Claim>> {
    let mut database = DbContext::new(registry.clone());
    let executor = database.on(JOB_BINDING, scope).await.unwrap();
    let mut claims = Vec::with_capacity(count);
    for _ in 0..count {
        let claim = job::claim(
            executor,
            scope,
            dever_runtime::database::now().unwrap(),
            60000,
        )
        .await
        .unwrap()
        .unwrap();
        assert_eq!(claim.schema, SCHEMA);
        assert_eq!(claim.target, TARGET);
        assert_eq!(claim.attempt, 1);
        claims.push(Arc::new(claim));
    }
    assert!(
        job::claim(
            executor,
            scope,
            dever_runtime::database::now().unwrap(),
            60000
        )
        .await
        .unwrap()
        .is_none()
    );
    claims
}

fn measure_jobs(
    runtime: &Runtime,
    registry: &Arc<Registry>,
    generated: bool,
    handler: bool,
    inputs: Vec<JobInput>,
) -> (u128, u64) {
    runtime
        .run(async |scope| {
            clear(scope, registry).await;
            let claims = if handler {
                for input in &inputs {
                    black_box(submit(false, input, scope, registry).await);
                }
                claims(scope, registry, inputs.len()).await
            } else {
                Vec::new()
            };
            let mut checksum = 0u64;
            let start = Instant::now();
            if handler {
                for claim in claims {
                    execute(generated, black_box(claim), scope, registry)
                        .await
                        .unwrap();
                    checksum += black_box(1);
                }
            } else {
                for input in &inputs {
                    let id = black_box(submit(generated, black_box(input), scope, registry).await);
                    checksum += id.len() as u64 + input.name.len() as u64 + input.amount as u64;
                }
            }
            let elapsed = start.elapsed().as_nanos();
            check_rows(scope, registry, &inputs, handler).await;
            (elapsed, checksum)
        })
        .unwrap()
}

fn main() {
    let (directory, path) = directory("jobs", r#""runtime":{"mode":"worker"}"#);
    let runtime = runtime();
    let registry = runtime
        .run(async |scope| database_registry(&path, scope).await)
        .unwrap()
        .unwrap();
    check_jobs(&runtime, &registry);
    header();
    for (name, handler) in [("job_enqueue_commit", false), ("job_handler_commit", true)] {
        samples(name, |generated, count| {
            measure_jobs(&runtime, &registry, generated, handler, inputs(count))
        });
    }
    samples("job_enqueue_large_payload_commit", |generated, count| {
        let mut inputs = inputs(count.div_ceil(64));
        for input in &mut inputs {
            input.name.push_str(&"a".repeat(64 * 1024));
        }
        measure_jobs(&runtime, &registry, generated, false, inputs)
    });
    samples("job_submit_claim_complete", |generated, count| {
        // 完整循环的每个样本包含 250 项实际任务；初始化及独立 SQL 核验不计时。
        measure_cycle(&runtime, &registry, generated, count.div_ceil(8), false)
    });
    samples("job_backlog_claim_complete", |generated, count| {
        measure_cycle(&runtime, &registry, generated, count.div_ceil(8), true)
    });
    samples("job_enqueue_duplicate_commit", |generated, count| {
        measure_duplicate(&runtime, &registry, generated, inputs(count))
    });
    drop(registry);
    drop(runtime);
    drop(directory);
}

fn measure_duplicate(
    runtime: &Runtime,
    registry: &Arc<Registry>,
    generated: bool,
    inputs: Vec<JobInput>,
) -> (u128, u64) {
    runtime
        .run(async |scope| {
            clear(scope, registry).await;
            let mut expected = Vec::with_capacity(inputs.len());
            for input in &inputs {
                expected.push(submit(false, input, scope, registry).await);
            }
            let mut actual = Vec::with_capacity(inputs.len());
            let mut checksum = 0u64;
            let start = Instant::now();
            for input in &inputs {
                let id = submit(generated, black_box(input), scope, registry).await;
                checksum += black_box(id.len() as u64);
                actual.push(id);
            }
            let elapsed = start.elapsed().as_nanos();
            assert_eq!(actual, expected);
            check_rows(scope, registry, &inputs, false).await;
            (elapsed, checksum)
        })
        .unwrap()
}

fn measure_cycle(
    runtime: &Runtime,
    registry: &Arc<Registry>,
    generated: bool,
    count: usize,
    backlog: bool,
) -> (u128, u64) {
    let inputs = inputs(count);
    runtime
        .run(async |scope| {
            clear(scope, registry).await;
            if backlog {
                for input in &inputs {
                    submit(generated, input, scope, registry).await;
                }
            }
            let start = Instant::now();
            let mut checksum = 0u64;
            for input in &inputs {
                if !backlog {
                    submit(generated, black_box(input), scope, registry).await;
                }
                let claim = {
                    let mut database = DbContext::new(registry.clone());
                    let executor = database.on(JOB_BINDING, scope).await.unwrap();
                    job::claim(
                        executor,
                        scope,
                        dever_runtime::database::now().unwrap(),
                        60000,
                    )
                    .await
                    .unwrap()
                    .unwrap()
                };
                execute(generated, Arc::new(claim), scope, registry)
                    .await
                    .unwrap();
                checksum += black_box(1);
            }
            let elapsed = start.elapsed().as_nanos();
            check_rows(scope, registry, &inputs, true).await;
            (elapsed, checksum)
        })
        .unwrap()
}