package api_test

import (
	"testing"

	"github.com/jfraeys/fetch_ml/internal/api/helpers"
	"github.com/jfraeys/fetch_ml/internal/queue"
)

// ProcessTest demonstrates the duplicate detection process step by step
func TestDuplicateDetectionProcess(t *testing.T) {
	t.Log("=== Duplicate Detection Process Test ===")

	// Step 1: First job submission
	t.Log("\n1. First job submission:")
	commitID := "abc123def456"
	args1 := "--epochs 10 --lr 0.001"
	datasets := []queue.DatasetSpec{{Name: "mnist", Checksum: "sha256:abc123"}}

	datasetID1 := helpers.ComputeDatasetID(datasets, nil)
	paramsHash1 := helpers.ComputeParamsHash(args1)

	t.Logf("   Commit ID: %s", commitID)
	t.Logf("   Dataset ID: %s (computed from %d datasets)", datasetID1, len(datasets))
	t.Logf("   Params Hash: %s (computed from args: %s)", paramsHash1, args1)
	t.Logf("   Composite Key: (%s, %s, %s)", commitID, datasetID1, paramsHash1)

	// Step 2: Second job with SAME parameters (should be duplicate)
	t.Log("\n2. Second job submission (same params):")
	args2 := "--epochs 10 --lr 0.001"                                            // Same args
	datasets2 := []queue.DatasetSpec{{Name: "mnist", Checksum: "sha256:abc123"}} // Same dataset

	datasetID2 := helpers.ComputeDatasetID(datasets2, nil)
	paramsHash2 := helpers.ComputeParamsHash(args2)

	t.Logf("   Commit ID: %s", commitID)
	t.Logf("   Dataset ID: %s", datasetID2)
	t.Logf("   Params Hash: %s", paramsHash2)
	t.Logf("   Composite Key: (%s, %s, %s)", commitID, datasetID2, paramsHash2)

	// Verify they're the same
	if datasetID1 == datasetID2 && paramsHash1 == paramsHash2 {
		t.Log("   ✓ DUPLICATE DETECTED - same composite key!")
	} else {
		t.Error("   ✗ Should have been detected as duplicate")
	}

	// Step 3: Third job with DIFFERENT parameters (not duplicate)
	t.Log("\n3. Third job submission (different params):")
	args3 := "--epochs 20 --lr 0.01"                                             // Different args
	datasets3 := []queue.DatasetSpec{{Name: "mnist", Checksum: "sha256:abc123"}} // Same dataset

	datasetID3 := helpers.ComputeDatasetID(datasets3, nil)
	paramsHash3 := helpers.ComputeParamsHash(args3)

	t.Logf("   Commit ID: %s", commitID)
	t.Logf("   Dataset ID: %s", datasetID3)
	t.Logf("   Params Hash: %s", paramsHash3)
	t.Logf("   Composite Key: (%s, %s, %s)", commitID, datasetID3, paramsHash3)

	// Verify they're different
	if paramsHash1 != paramsHash3 {
		t.Log("   ✓ NOT A DUPLICATE - different params_hash")
	} else {
		t.Error("   ✗ Should have different params_hash")
	}

	// Step 4: Fourth job with DIFFERENT dataset (not duplicate)
	t.Log("\n4. Fourth job submission (different dataset):")
	args4 := "--epochs 10 --lr 0.001"                                              // Same args
	datasets4 := []queue.DatasetSpec{{Name: "cifar10", Checksum: "sha256:def456"}} // Different dataset

	datasetID4 := helpers.ComputeDatasetID(datasets4, nil)
	paramsHash4 := helpers.ComputeParamsHash(args4)

	t.Logf("   Commit ID: %s", commitID)
	t.Logf("   Dataset ID: %s", datasetID4)
	t.Logf("   Params Hash: %s", paramsHash4)
	t.Logf("   Composite Key: (%s, %s, %s)", commitID, datasetID4, paramsHash4)

	// Verify they're different
	if datasetID1 != datasetID4 {
		t.Log("   ✓ NOT A DUPLICATE - different dataset_id")
	} else {
		t.Error("   ✗ Should have different dataset_id")
	}

	// Step 5: Summary
	t.Log("\n5. Summary:")
	t.Log("   - Jobs 1 & 2: Same commit_id + dataset_id + params_hash = DUPLICATE")
	t.Log("   - Job 3: Different params_hash = NOT DUPLICATE")
	t.Log("   - Job 4: Different dataset_id = NOT DUPLICATE")
	t.Log("\n   The composite key (commit_id, dataset_id, params_hash) ensures")
	t.Log("   only truly identical experiments are flagged as duplicates.")
}