package be.simplenotes.search

import be.simplenotes.types.PersistedNote
import be.simplenotes.types.PersistedNoteMetadata
import org.assertj.core.api.Assertions.assertThat
import org.intellij.lang.annotations.Language
import org.junit.jupiter.api.AfterAll
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.parallel.ResourceLock
import java.nio.file.Path
import java.time.LocalDateTime
import java.util.*

@ResourceLock("lucene")
internal class NoteSearcherImplTest {

    // region setup
    private val searcher = NoteSearcherImpl(Path.of("/tmp", "lucene"))

    private fun index(
        title: String,
        tags: List<String> = emptyList(),
        content: String = "",
        uuid: UUID = UUID.randomUUID(),
    ): PersistedNote {
        val note = PersistedNote(
            title = title,
            tags = tags,
            markdown = content,
            html = "",
            updatedAt = LocalDateTime.MIN,
            uuid = uuid,
            public = false,
        )
        searcher.indexNote(1, note)
        return note
    }

    private fun search(
        title: String? = null,
        tag: String? = null,
        content: String? = null,
        all: String? = null,
    ): List<PersistedNoteMetadata> = searcher.search(1, SearchTerms(title, tag, content, all))

    @BeforeEach
    @AfterAll
    fun dropIndexes() {
        searcher.dropIndex(1)
    }

    @Language("markdown")
    val markdownSample =
        """
            # Apache Lucene Core

            Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java.
            It is a technology suitable for nearly any application that requires full-text search, especially cross-platform.

            Apache Lucene is an open source project available for free download. Please use the links on the right to access Lucene.

            # Lucene Features

            Lucene offers powerful features through a simple API:

            ## Scalable, High-Performance Indexing

            *   over [150GB/hour on modern hardware](http://home.apache.org/~mikemccand/lucenebench/indexing.html)
            *   small RAM requirements -- only 1MB heap
            *   incremental indexing as fast as batch indexing
            *   index size roughly 20-30% the size of text indexed
        """.trimIndent()
    // endregion

    @Test
    fun `exact title search`() {
        index("first")
        index("second")
        index("flip")

        assertThat(search("first"))
            .hasSizeGreaterThanOrEqualTo(1)
            .anyMatch { it.title == "first" }

        assertThat(search("nothing")).isEmpty()
    }

    @Test
    fun `fuzzy title search`() {
        index("first")
        index("second")
        index("flip")

        @Suppress("SpellCheckingInspection")
        assertThat(search("firt"))
            .hasSizeGreaterThanOrEqualTo(1)
            .anyMatch { it.title == "first" }

        assertThat(search("nothing")).isEmpty()
    }

    @Test
    fun `exact tags search`() {
        index("first", tags = listOf("example", "flamingo"))
        index("second", tags = listOf("yes"))
        index("second")

        assertThat(search(tag = "example"))
            .hasSize(1)
            .anyMatch { it.title == "first" }
    }

    @Test
    fun `exact content search`() {
        index("first", content = markdownSample)

        assertThat(search(content = "fast"))
            .hasSize(1)
            .anyMatch { it.title == "first" }

        @Suppress("SpellCheckingInspection")
        assertThat(search(content = "preformance")) // <- note the error
            .hasSize(1)
            .anyMatch { it.title == "first" }
    }

    @Test
    fun `combined search`() {
        index("first", content = markdownSample, tags = listOf("abc"))

        assertThat(search(title = "fir", tag = "abc", content = "20"))
            .hasSize(1)
    }

    @Test
    fun `search all`() {
        index("first", content = markdownSample, tags = listOf("abc"))

        assertThat(search(all = "abc", title = "first"))
            .hasSize(1)
    }

    @Test
    fun `delete index`() {
        val uuid = index("first").uuid
        searcher.deleteIndex(1, uuid)
        assertThat(search("first")).isEmpty()
    }

    @Test
    fun `update index`() {
        val note = index("first")
        searcher.updateIndex(1, note.copy(title = "new"))
        assertThat(search("first")).isEmpty()
        assertThat(search("new")).hasSize(1)
    }
}