# encoding:utf-8

import json
import os
from bridge.context import ContextType
from bridge.reply import Reply, ReplyType
import plugins
from plugins import *
from common.log import logger
import webuiapi
import io


@plugins.register(name="sdwebui", desc="利用stable-diffusion webui来画图", version="2.0", author="lanvent")
class SDWebUI(Plugin):
    def __init__(self):
        super().__init__()
        curdir = os.path.dirname(__file__)
        config_path = os.path.join(curdir, "config.json")
        try:
            with open(config_path, "r", encoding="utf-8") as f:
                config = json.load(f)
                self.rules = config["rules"]
                defaults = config["defaults"]
                self.default_params = defaults["params"]
                self.default_options = defaults["options"]
                self.start_args = config["start"]
                self.api = webuiapi.WebUIApi(**self.start_args)
            self.handlers[Event.ON_HANDLE_CONTEXT] = self.on_handle_context
            logger.info("[SD] inited")
        except FileNotFoundError:
            logger.error(f"[SD] init failed, {config_path} not found")
        except Exception as e:
            logger.error("[SD] init failed, exception: %s" % e)
    
    def on_handle_context(self, e_context: EventContext):

        if e_context['context'].type != ContextType.IMAGE_CREATE:
            return

        logger.debug("[SD] on_handle_context. content: %s" %e_context['context'].content)

        logger.info("[SD] image_query={}".format(e_context['context'].content))
        reply = Reply()
        try:
            content = e_context['context'].content[:]
            # 解析用户输入 如"横版 高清 二次元:cat"
            keywords, prompt = content.split(":", 1)
            keywords = keywords.split()

            rule_params = {}
            rule_options = {}
            for keyword in keywords:
                matched = False
                for rule in self.rules:
                    if keyword in rule["keywords"]:
                        for key in rule["params"]:
                            rule_params[key] = rule["params"][key]
                        if "options" in rule:
                            for key in rule["options"]:
                                rule_options[key] = rule["options"][key]
                        matched = True
                        break  # 一个关键词只匹配一个规则
                if not matched:
                    logger.warning("[SD] keyword not matched: %s" % keyword)
            
            params = {**self.default_params, **rule_params}
            options = {**self.default_options, **rule_options}
            params["prompt"] = params.get("prompt", "")+f", {prompt}"
            if len(options) > 0:
                logger.info("[SD] cover rule_options={}".format(rule_options))
                self.api.set_options(options)
            logger.info("[SD] params={}".format(params))
            result = self.api.txt2img(
                **params
            )
            reply.type = ReplyType.IMAGE
            b_img = io.BytesIO()
            result.image.save(b_img, format="PNG")
            reply.content = b_img
            e_context.action = EventAction.BREAK_PASS  # 事件结束后，不跳过处理context的默认逻辑
        except Exception as e:
            reply.type = ReplyType.ERROR
            reply.content = "[SD] "+str(e)
            logger.error("[SD] exception: %s" % e)
            e_context.action = EventAction.CONTINUE  # 事件继续，交付给下个插件或默认逻辑
        finally:
            e_context['reply'] = reply