use std::collections::BTreeMap;

use meili_snap::{json_string, snapshot};
use wiremock::matchers::{method, path};
use wiremock::{Mock, MockServer, Request, ResponseTemplate};

use crate::common::Value;
use crate::json;
use crate::vector::{get_server_vector, GetAllDocumentsOptions};

async fn create_mock(indexing_fragments: Value, search_fragments: Value) -> (MockServer, Value) {
    let mock_server = MockServer::start().await;

    let text_to_embedding: BTreeMap<_, _> = vec![
        ("kefir", [0.5, -0.5, 0.0]),
        ("intel", [1.0, 1.0, 0.0]),
        ("dustin", [-0.5, 0.5, 0.0]),
        ("bulldog", [0.0, 0.0, 1.0]),
        ("labrador", [0.0, 0.0, -1.0]),
    ]
    .into_iter()
    .collect();

    Mock::given(method("POST"))
        .and(path("/"))
        .respond_with(move |req: &Request| {
            let text = String::from_utf8_lossy(&req.body).to_string();
            let mut data = [0.0, 0.0, 0.0];
            for (inner_text, inner_data) in &text_to_embedding {
                if text.contains(inner_text) {
                    for (i, &value) in inner_data.iter().enumerate() {
                        data[i] += value;
                    }
                }
            }
            ResponseTemplate::new(200).set_body_json(
                json!({ "data": data })
            )
        })
        .mount(&mock_server)
        .await;
    let url = mock_server.uri();

    let embedder_settings = json!({
        "source": "rest",
        "url": url,
        "dimensions": 3,
        "request": "{{fragment}}",
        "response": {
          "data": "{{embedding}}"
        },
        "indexingFragments": indexing_fragments,
        "searchFragments": search_fragments,
        "documentTemplate": "document template: {{dog.name}}",
    });

    (mock_server, embedder_settings)
}


#[actix_rt::test]
async fn test_fragment_indexing() {
    let (_mock, settings) = create_mock(
        json!({
            "withBreed": {"value": "{{ doc.name }} is a {{ doc.breed }}"},
            "basic": {"value": "{{ doc.name }} is a dog"},
        }),
        json!({
            "withBreed": {"value": "{{ doc.name }} is a {{ doc.breed }}"},
            "basic": {"value": "{{ doc.name }} is a dog"},
        })
    ).await;
    let server = get_server_vector().await;
    let index = server.index("doggo");

    // Enable the experimental feature
    let (_response, code) = server.set_features(json!({"multimodal": true})).await;
    snapshot!(code, @"200 OK");

    // Configure the index to use our mock embedder
    let (response, code) = index
        .update_settings(json!({
            "embedders": {
                "rest": settings,
            },
        }))
        .await;
    snapshot!(code, @"202 Accepted");
    
    let task = server.wait_task(response.uid()).await;
    println!("[task] {:?}", task);
    snapshot!(task["status"], @r###""succeeded""###);

    // Send documents
    let documents = json!([
        {"id": 0, "name": "kefir"},
        {"id": 1, "name": "echo", "_vectors": { "rest": [1, 1, 1] }},
        {"id": 2, "name": "intel", "breed": "labrador"},
        {"id": 3, "name": "dustin", "breed": "bulldog"},
    ]);
    let (value, code) = index.add_documents(documents, None).await;
    snapshot!(code, @"202 Accepted");
    
    let task = index.wait_task(value.uid()).await;
    snapshot!(task["status"], @r###""succeeded""###);

    // Make sure the documents have been indexed and their embeddings retrieved
    let (documents, code) = index
        .get_all_documents(GetAllDocumentsOptions { retrieve_vectors: true, ..Default::default() })
        .await;
    snapshot!(code, @"200 OK");
    snapshot!(json_string!(documents), @r#"
    {
      "results": [
        {
          "id": 0,
          "name": "kefir",
          "_vectors": {
            "rest": {
              "embeddings": [
                [
                  0.5,
                  -0.5,
                  2.0
                ]
              ],
              "regenerate": true
            }
          }
        },
        {
          "id": 1,
          "name": "echo",
          "_vectors": {
            "rest": {
              "embeddings": [
                [
                  1.0,
                  1.0,
                  1.0
                ]
              ],
              "regenerate": false
            }
          }
        },
        {
          "id": 2,
          "name": "intel",
          "breed": "labrador",
          "_vectors": {
            "rest": {
              "embeddings": [
                [
                  1.0,
                  1.0,
                  1.0
                ],
                [
                  -2.5,
                  1.5,
                  0.0
                ]
              ],
              "regenerate": true
            }
          }
        },
        {
          "id": 3,
          "name": "dustin",
          "breed": "bulldog",
          "_vectors": {
            "rest": {
              "embeddings": [
                [
                  -0.5,
                  0.5,
                  2.5
                ],
                [
                  1.0,
                  -2.0,
                  2.5
                ]
              ],
              "regenerate": true
            }
          }
        }
      ],
      "offset": 0,
      "limit": 20,
      "total": 4
    }
    "#);
}

#[actix_rt::test]
async fn test_search_fragments() {
    let (_mock, settings) = create_mock(
        json!({
            "withBreed": {"value": "{{ doc.name }} is a {{ doc.breed }}"},
            "basic": {"value": "{{ doc.name }} is a dog"},
        }),
        json!({
            "justBreed": {"value": "It's a {{ media.breed }}"},
            "justName": {"value": "{{ media.name }} is a dog"},
            "query": {"value": "Some pre-prompt for query {{ q }}"},
        })
    ).await;
    let server = get_server_vector().await;
    let index = server.index("doggo");

    // Enable the experimental feature
    let (_response, code) = server.set_features(json!({"multimodal": true})).await;
    snapshot!(code, @"200 OK");

    // Configure the index to use our mock embedder
    let (response, code) = index
        .update_settings(json!({
            "embedders": {
                "rest": settings,
            },
        }))
        .await;
    snapshot!(code, @"202 Accepted");
    
    let task = server.wait_task(response.uid()).await;
    snapshot!(task["status"], @r###""succeeded""###);

    // Send documents
    let documents = json!([
        {"id": 0, "name": "kefir"},
        {"id": 1, "name": "echo", "_vectors": { "rest": [1, 1, 1] }},
        {"id": 2, "name": "intel", "breed": "labrador"},
        {"id": 3, "name": "dustin", "breed": "bulldog"},
    ]);
    let (value, code) = index.add_documents(documents, None).await;
    snapshot!(code, @"202 Accepted");
    
    let task = index.wait_task(value.uid()).await;
    snapshot!(task["status"], @r###""succeeded""###);

    // Perform a search with a provided vector
    let (value, code) = index.search_post(
        json!({"vector": [1.0, 1.0, 1.0], "hybrid": {"semanticRatio": 1.0, "embedder": "rest"}, "limit": 1}
    )).await;
    snapshot!(code, @"200 OK");
    snapshot!(value, @r#"
    {
      "hits": [
        {
          "id": 1,
          "name": "echo"
        }
      ],
      "query": "",
      "processingTimeMs": "[duration]",
      "limit": 1,
      "offset": 0,
      "estimatedTotalHits": 4,
      "semanticHitCount": 1
    }
    "#);

    // Perform a search with some media
    let (value, code) = index.search_post(
        json!({
            "media": { "breed": "labrador" },
            "hybrid": {"semanticRatio": 1.0, "embedder": "rest"},
            "limit": 1
        }
    )).await;
    snapshot!(code, @"200 OK");
    snapshot!(value, @r#"
    {
      "hits": [
        {
          "id": 2,
          "name": "intel",
          "breed": "labrador"
        }
      ],
      "query": "",
      "processingTimeMs": "[duration]",
      "limit": 1,
      "offset": 0,
      "estimatedTotalHits": 4,
      "semanticHitCount": 1
    }
    "#);

    // Perform a search that matches multiple media
    let (value, code) = index.search_post(
        json!({
            "media": { "name": "dustin", "breed": "labrador" },
            "hybrid": {"semanticRatio": 1.0, "embedder": "rest"},
            "limit": 1
        }
    )).await;
    snapshot!(code, @"400 Bad Request");
    snapshot!(value, @r#"
    {
      "message": "Error while generating embeddings: user error: Query matches multiple search fragments.\n  - Note: First matched fragment `justBreed`.\n  - Note: Second matched fragment `justName`.\n  - Note: {\"q\":null,\"media\":{\"name\":\"dustin\",\"breed\":\"labrador\"}}",
      "code": "vector_embedding_error",
      "type": "invalid_request",
      "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
    }
    "#);

    // Perform a search that matches no media
    let (value, code) = index.search_post(
        json!({
            "media": { "ticker": "GME", "section": "portfolio" },
            "hybrid": {"semanticRatio": 1.0, "embedder": "rest"},
            "limit": 1
        }
    )).await;
    snapshot!(code, @"400 Bad Request");
    snapshot!(value, @r#"
    {
      "message": "Error while generating embeddings: user error: Query matches no search fragment.\n  - Note: {\"q\":null,\"media\":{\"ticker\":\"GME\",\"section\":\"portfolio\"}}",
      "code": "vector_embedding_error",
      "type": "invalid_request",
      "link": "https://docs.meilisearch.com/errors#vector_embedding_error"
    }
    "#);

    // Perform a search with a query media
    let (value, code) = index.search_post(
        json!({
            "q": "bulldog",
            "hybrid": {"semanticRatio": 1.0, "embedder": "rest"},
            "limit": 1
        }
    )).await;
    snapshot!(code, @"200 OK");
    snapshot!(value, @r#"
    {
      "hits": [
        {
          "id": 3,
          "name": "dustin",
          "breed": "bulldog"
        }
      ],
      "query": "bulldog",
      "processingTimeMs": "[duration]",
      "limit": 1,
      "offset": 0,
      "estimatedTotalHits": 4,
      "semanticHitCount": 1
    }
    "#);
}