//! 评估量表插件 — 标准化医学评估（PHQ-9, GAD-7 等）

use serde_json::json;

wit_bindgen::generate!({
    path: "../erp-plugin-prototype/wit/plugin.wit",
    world: "plugin-world",
});

use crate::erp::plugin::host_api;
use crate::exports::erp::plugin::plugin_api::Guest;

struct AssessmentPlugin;

impl Guest for AssessmentPlugin {
    fn init() -> Result<(), String> {
        host_api::log_write("info", "AssessmentPlugin initialized");
        Ok(())
    }

    fn on_tenant_created(tenant_id: String) -> Result<(), String> {
        host_api::log_write(
            "info",
            &format!(
                "AssessmentPlugin: tenant {} created, inserting default scales",
                tenant_id
            ),
        );

        insert_phq9_scale(&tenant_id)?;

        Ok(())
    }

    fn handle_event(event_type: String, payload: Vec<u8>) -> Result<(), String> {
        host_api::log_write(
            "debug",
            &format!("AssessmentPlugin received: {}", event_type),
        );

        if event_type == "assessment_completed" {
            let data: serde_json::Value =
                serde_json::from_slice(&payload).map_err(|e| format!("解析失败: {}", e))?;
            host_api::log_write(
                "info",
                &format!(
                    "评估完成: scale_id={}, patient_id={}",
                    data["scale_id"].as_str().unwrap_or("?"),
                    data["patient_id"].as_str().unwrap_or("?")
                ),
            );
        }

        Ok(())
    }
}

/// 插入 PHQ-9 抑郁筛查量表默认数据
fn insert_phq9_scale(tenant_id: &str) -> Result<(), String> {
    let questions = json!([
        {"id": 1, "text": "做事时提不起劲或没有兴趣", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 2, "text": "感到心情低落、沮丧或绝望", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 3, "text": "入睡困难、睡不安稳或睡眠过多", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 4, "text": "感觉疲倦或没有活力", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 5, "text": "食欲不振或吃太多", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 6, "text": "觉得自己很糟，或觉得自己失败了，或让自己和家人失望", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 7, "text": "对事物专注有困难（例如阅读或看电视）", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 8, "text": "动作或说话速度缓慢到别人可以察觉，或正好相反——烦躁不安地动来动去", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]},
        {"id": 9, "text": "有不如死掉或者用某种方式伤害自己的念头", "options": [
            {"label": "完全不会", "score": 0},
            {"label": "好几天", "score": 1},
            {"label": "一半以上的天数", "score": 2},
            {"label": "几乎每天", "score": 3}
        ]}
    ]);

    let scoring_rules = json!([
        {"min": 0, "max": 4, "level": "normal", "label": "无抑郁症状"},
        {"min": 5, "max": 9, "level": "mild", "label": "轻度抑郁"},
        {"min": 10, "max": 14, "level": "moderate", "label": "中度抑郁"},
        {"min": 15, "max": 19, "level": "moderate_severe", "label": "中重度抑郁"},
        {"min": 20, "max": 27, "level": "severe", "label": "重度抑郁"}
    ]);

    let data = json!({
        "scale_code": "PHQ-9",
        "title": "PHQ-9 患者健康问卷（抑郁筛查）",
        "description": "Patient Health Questionnaire-9，用于抑郁症状筛查和严重程度评估",
        "questions_json": questions,
        "scoring_rules_json": scoring_rules,
        "status": "active",
        "tenant_id": tenant_id,
    });

    let result = host_api::db_insert("assessment_scale", data.to_string().as_bytes())
        .map_err(|e| format!("插入 PHQ-9 默认量表失败: {}", e))?;

    let record: serde_json::Value =
        serde_json::from_slice(&result).map_err(|e| format!("解析结果失败: {}", e))?;

    host_api::log_write(
        "info",
        &format!(
            "PHQ-9 默认量表已创建: id={}",
            record["id"].as_str().unwrap_or("?")
        ),
    );

    Ok(())
}

export!(AssessmentPlugin);