//! Tests for the request body. Do not edit.
//!
//! Bodies are compared as JSON values, so key order is free. What is not free: which keys
//! appear, and that the same input always gives the same bytes.

mod support;

use loopd::llama::request::build_body;
use loopd::llama::{ChatMessage, ChatRequest, ToolSchema};
use serde_json::{Value, json};
use std::path::Path;

fn body(req: &ChatRequest) -> Value {
    let cfg = support::test_config(Path::new("/tmp/unused.sock"));
    serde_json::from_str(&build_body(&cfg, req).unwrap()).unwrap()
}

fn user(text: &str) -> ChatMessage {
    ChatMessage::User {
        content: text.to_string(),
    }
}

fn read_file_tool() -> ToolSchema {
    ToolSchema {
        name: "read_file".to_string(),
        description: "Read a text file.".to_string(),
        parameters: json!({"type": "object", "properties": {"path": {"type": "string"}}, "required": ["path"]}),
    }
}

#[test]
fn a_plain_request_carries_every_setting() {
    let req = ChatRequest {
        slot: 1,
        messages: vec![user("hi")],
        tools: vec![],
        thinking: true,
    };
    let want = json!({
        "model": "test-model",
        "messages": [{"role": "user", "content": "hi"}],
        "id_slot": 1,
        "cache_prompt": true,
        "stream": true,
        "return_progress": true,
        "timings_per_token": true,
        "reasoning_control": true,
        "max_tokens": 8192,
        "temperature": 0.6,
        "top_p": 0.95,
        "top_k": 20,
        "chat_template_kwargs": {"enable_thinking": true},
    });
    assert_eq!(body(&req), want, "no `tools` key when there are no tools");
}

#[test]
fn thinking_off_and_tools() {
    let req = ChatRequest {
        slot: 0,
        messages: vec![user("hi")],
        tools: vec![read_file_tool()],
        thinking: false,
    };
    let got = body(&req);
    assert_eq!(
        got["chat_template_kwargs"],
        json!({"enable_thinking": false})
    );
    let want_tools = json!([{
        "type": "function",
        "function": {
            "name": "read_file",
            "description": "Read a text file.",
            "parameters": {"type": "object", "properties": {"path": {"type": "string"}}, "required": ["path"]},
        },
    }]);
    assert_eq!(got["tools"], want_tools);
}

/// One message of every kind, and both shapes of assistant message. An example of each is
/// here on purpose: they are rendered differently.
#[test]
fn every_kind_of_message() {
    let call = proto::ToolCall {
        id: "call_1".to_string(),
        name: "read_file".to_string(),
        arguments: r#"{"path":"/etc/hostname"}"#.to_string(),
    };
    let messages = vec![
        ChatMessage::System {
            content: "be careful".to_string(),
        },
        user("read it"),
        ChatMessage::Assistant {
            content: None,
            reasoning_content: Some("I should read the file.".to_string()),
            tool_calls: vec![call],
        },
        ChatMessage::Tool {
            tool_call_id: "call_1".to_string(),
            content: "straylight\n".to_string(),
        },
        ChatMessage::Assistant {
            content: Some("It says straylight.".to_string()),
            reasoning_content: None,
            tool_calls: vec![],
        },
    ];
    let req = ChatRequest {
        slot: 0,
        messages,
        tools: vec![read_file_tool()],
        thinking: true,
    };
    let want = json!([
        {"role": "system", "content": "be careful"},
        {"role": "user", "content": "read it"},
        {
            "role": "assistant",
            "content": "",
            "reasoning_content": "I should read the file.",
            "tool_calls": [{
                "id": "call_1",
                "type": "function",
                "function": {"name": "read_file", "arguments": "{\"path\":\"/etc/hostname\"}"},
            }],
        },
        {"role": "tool", "tool_call_id": "call_1", "content": "straylight\n"},
        {"role": "assistant", "content": "It says straylight."},
    ]);
    assert_eq!(body(&req)["messages"], want);
}

#[test]
fn values_come_from_the_config() {
    let mut cfg = support::test_config(Path::new("/tmp/unused.sock"));
    cfg.infer.model = "another-model".to_string();
    cfg.limits.max_tokens = 99;
    cfg.sampling.temperature = 0.25;
    cfg.sampling.top_p = 0.5;
    cfg.sampling.top_k = 7;
    let req = ChatRequest {
        slot: 3,
        messages: vec![user("hi")],
        tools: vec![],
        thinking: false,
    };
    let got: Value = serde_json::from_str(&build_body(&cfg, &req).unwrap()).unwrap();
    assert_eq!(got["model"], "another-model");
    assert_eq!(got["max_tokens"], 99);
    assert_eq!(got["temperature"], 0.25);
    assert_eq!(got["top_p"], 0.5);
    assert_eq!(got["top_k"], 7);
    assert_eq!(got["id_slot"], 3);
}

#[test]
fn the_same_input_gives_the_same_bytes() {
    let cfg = support::test_config(Path::new("/tmp/unused.sock"));
    let req = ChatRequest {
        slot: 0,
        messages: vec![user(
            "text with \"quotes\", a \\ backslash, a\nnewline and caf\u{e9} \u{1f4e6}",
        )],
        tools: vec![read_file_tool()],
        thinking: true,
    };
    let first = build_body(&cfg, &req).unwrap();
    for _ in 0..20 {
        assert_eq!(build_body(&cfg, &req).unwrap(), first);
    }
    let back: Value = serde_json::from_str(&first).unwrap();
    assert_eq!(
        back["messages"][0]["content"],
        "text with \"quotes\", a \\ backslash, a\nnewline and caf\u{e9} \u{1f4e6}"
    );
}