"""공용 스니펫 — 로컬 SQLite(snippets/usage) 를 그대로 서버 PostgreSQL 로. 전원 읽기, 사용 기록은 사람별."""

from django.conf import settings
from django.db import models


class Snippet(models.Model):
    name = models.CharField(max_length=200, primary_key=True)  # 대문자·공백→_ 정규화된 이름(옛 DB 와 동일)
    desc = models.CharField(max_length=500, blank=True, default="")
    body = models.TextField()
    category = models.CharField(max_length=100, default="코드")
    created_by = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, on_delete=models.SET_NULL, related_name="+")
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ["name"]

    def as_dto(self, usage: "SnippetUsage | None" = None) -> dict:
        return {
            "name": self.name,
            "desc": self.desc,
            "body": self.body,
            "category": self.category,
            "usageCount": usage.count if usage else 0,
            "lastUsed": int(usage.last_used.timestamp()) if usage and usage.last_used else 0,
        }


class SnippetUsage(models.Model):
    """사람별 사용 횟수 — 랭킹은 내 기준으로."""

    snippet = models.ForeignKey(Snippet, on_delete=models.CASCADE, related_name="usages")
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="+")
    count = models.IntegerField(default=0)
    last_used = models.DateTimeField(null=True)

    class Meta:
        unique_together = [("snippet", "user")]