package redis

import (
	"context"
	"testing"
	"time"
)

func TestRPushPipelineRejectsNonPositiveBatchSize(t *testing.T) {
	client := &Client{}
	if _, err := client.RPushPipeline("queue", []string{"video-1"}, 0); err == nil {
		t.Fatal("RPushPipeline() should reject a non-positive batch size")
	}
}

func TestRPushPipelineEmptyValuesDoesNotUseClient(t *testing.T) {
	client := &Client{}
	length, err := client.RPushPipeline("queue", nil, 1000)
	if err != nil {
		t.Fatalf("RPushPipeline() error = %v", err)
	}
	if length != 0 {
		t.Fatalf("RPushPipeline() length = %d, want 0", length)
	}
}

func TestRPushPipelineContextValidatesExpiration(t *testing.T) {
	client := &Client{}
	for _, expirations := range [][]time.Duration{
		{0},
		{-time.Second},
		{time.Second, time.Minute},
	} {
		if _, err := client.RPushPipelineContext(
			context.Background(),
			"queue",
			[]string{"video-1"},
			1,
			expirations...,
		); err == nil {
			t.Fatalf("expirations=%v should be rejected", expirations)
		}
	}
}

func TestScriptHashIsStable(t *testing.T) {
	first := NewScript("return ARGV[1]")
	second := NewScript("return ARGV[1]")
	if first.Hash() == "" || first.Hash() != second.Hash() {
		t.Fatalf("script hashes differ: first=%q second=%q", first.Hash(), second.Hash())
	}
}

func TestRunScriptContextValidatesArguments(t *testing.T) {
	client := &Client{}
	if _, err := client.RunScriptContext(nil, NewScript("return 1"), nil); err == nil {
		t.Fatal("RunScriptContext() should reject a nil context")
	}
	if _, err := client.RunScriptContext(context.Background(), nil, nil); err == nil {
		t.Fatal("RunScriptContext() should reject a nil script")
	}
	if _, err := client.RunScriptContext(context.Background(), NewScript("return 1"), nil); err == nil {
		t.Fatal("RunScriptContext() should reject an uninitialized client")
	}
}

func TestContextRedisHelpersValidateContextAndClient(t *testing.T) {
	var client *Client
	if _, err := client.DelContext(context.Background(), "key"); err == nil {
		t.Fatal("DelContext() should reject nil client")
	}
	if _, err := client.EvalContext(context.Background(), "return 1", nil); err == nil {
		t.Fatal("EvalContext() should reject nil client")
	}
	if _, err := client.RPushPipelineContext(
		context.Background(), "queue", []string{"video-1"}, 1,
	); err == nil {
		t.Fatal("RPushPipelineContext() should reject nil client")
	}
	if _, err := client.SetNXContext(context.Background(), "key", "value", 0); err == nil {
		t.Fatal("SetNXContext() should reject nil client")
	}

	empty := &Client{}
	if _, err := empty.DelContext(nil, "key"); err == nil {
		t.Fatal("DelContext() should reject nil context")
	}
	if _, err := empty.EvalContext(nil, "return 1", nil); err == nil {
		t.Fatal("EvalContext() should reject nil context")
	}
	if _, err := empty.RPushPipelineContext(nil, "queue", []string{"video-1"}, 1); err == nil {
		t.Fatal("RPushPipelineContext() should reject nil context")
	}
	if _, err := empty.SetNXContext(nil, "key", "value", 0); err == nil {
		t.Fatal("SetNXContext() should reject nil context")
	}
}