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use serde::{Deserialize, Serialize};

use super::{ContentBlock, Role, StopReason, Usage};

#[derive(Debug, Deserialize, Default, Clone, PartialEq, Serialize)]
pub struct Response {
    pub id: String,
    pub r#type: String,
    pub role: Role,
    pub content: Vec<ContentBlock>,
    pub model: String,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub stop_reason: Option<StopReason>,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub stop_sequence: Option<String>,
    pub usage: Usage,
}

#[cfg(test)]
mod tests {
    use crate::messages::{ContentBlock, Role};

    use super::*;
    #[test]
    fn serde() {
        let tests = vec![
            (
                "simple",
                r#"{
                "content": [
                  {
                    "text": "Hi! My name is Claude.",
                    "type": "text"
                  }
                ],
                "id": "msg_013Zva2CMHLNnXjNJJKqJ2EF",
                "model": "claude-3-opus-20240229",
                "role": "assistant",
                "stop_reason": "end_turn",
                "stop_sequence": null,
                "type": "message",
                "usage": {
                  "input_tokens": 10,
                  "output_tokens": 25
                }
              }"#,
                Response {
                    id: "msg_013Zva2CMHLNnXjNJJKqJ2EF".to_string(),
                    model: "claude-3-opus-20240229".to_string(),
                    content: vec![
                        ContentBlock::Text {
                            text: "Hi! My name is Claude.".to_string(),
                        },
                    ],
                    role: Role::Assistant,
                    stop_reason: Some(StopReason::EndTurn),
                    stop_sequence: None,
                    r#type: "message".to_string(),
                    usage: Usage {
                        input_tokens: Some(10),
                        output_tokens: 25,
                    },
                },
            ),
            (
                "tool_use",
                r#"{
                    "id": "msg_01Aq9w938a90dw8q",
                    "type": "message",
                    "model": "claude-3-opus-20240229",
                    "stop_reason": "tool_use",
                    "role": "assistant",
                    "stop_sequence": null,
                    "content": [
                      {
                        "type": "text",
                        "text": "<thinking>I need to call the get_weather function, and the user wants SF, which is likely San Francisco, CA.</thinking>"
                      },
                      {
                        "type": "tool_use",
                        "id": "toolu_01A09q90qw90lq917835lq9",
                        "name": "get_weather",
                        "input": {"location": "San Francisco, CA", "unit": "celsius"}
                      }
                    ],
                    "usage": {
                        "input_tokens": 527,
                        "output_tokens": 137
                    }
                  }"#,
                Response {
                    id: "msg_01Aq9w938a90dw8q".to_string(),
                    model: "claude-3-opus-20240229".to_string(),
                    content: vec![
                        ContentBlock::Text {
                            text: "<thinking>I need to call the get_weather function, and the user wants SF, which is likely San Francisco, CA.</thinking>".to_string(),
                        },
                        ContentBlock::ToolUse {
                             id: "toolu_01A09q90qw90lq917835lq9".to_string(),
                             name: "get_weather".to_string(), input:serde_json::json!({"location": "San Francisco, CA", "unit": "celsius"})
                            }
                    ],
                    role: Role::Assistant,
                    stop_reason: Some(StopReason::ToolUse),
                    stop_sequence: None,
                    r#type: "message".to_string(),
                    usage: Usage {
                        input_tokens: Some(527),
                        output_tokens: 137,
                    },
                },
            ),
        ];
        for (name, json, expected) in tests {
            //test deserialize
            let actual: Response = serde_json::from_str(json).unwrap();
            assert_eq!(actual, expected, "deserialize test failed: {}", name);
            //test serialize
            let serialized = serde_json::to_string(&expected).unwrap();
            let actual: Response = serde_json::from_str(&serialized).unwrap();
            assert_eq!(actual, expected, "serialize test failed: {}", name);
        }
    }
}