import secrets

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



# GitHub Actions 运行状态 -> 中文展示文案
STATUS_LABELS = {
    "Starting generator...please wait": "正在启动构建任务",
    "queued": "排队中",
    "in_progress": "构建中",
    "success": "构建成功",
    "failure": "构建失败",
    "cancelled": "已取消",
    "timed_out": "已超时",
    "skipped": "已跳过",
    "action_required": "等待人工处理",
}

# 状态对应的徽标样式（模板中使用）
STATUS_BADGE = {
    "Starting generator...please wait": "badge-info",
    "queued": "badge-info",
    "in_progress": "badge-info",
    "success": "badge-success",
    "failure": "badge-danger",
    "cancelled": "badge-warning",
    "timed_out": "badge-warning",
    "skipped": "badge-secondary",
    "action_required": "badge-warning",
}

PLATFORM_LABELS = {
    "windows": "Windows 64 位",
    "windows-x86": "Windows 32 位",
    "linux": "Linux",
    "android": "Android",
    "macos": "macOS",
}


def generate_token_key():
    return secrets.token_hex(20)


class GithubRun(models.Model):
    uuid = models.CharField("任务 UUID", max_length=100, db_index=True)
    status = models.CharField("构建状态", max_length=100, default="queued")
    github_run_id = models.BigIntegerField("GitHub 运行编号", null=True, blank=True)
    # 构建平台：github / gitea；历史任务默认 github。切换平台后旧任务仍按此值查询状态
    backend = models.CharField("构建平台", max_length=20, default="github")
    platform = models.CharField("目标平台", max_length=20, blank=True, default="")
    filename = models.CharField("文件名", max_length=200, blank=True, default="")
    # 提交时的表单快照（纯字符串/数值，图片为 data URL），供失败后「一键重试」重新派发
    config_data = models.JSONField("构建配置快照", blank=True, default=dict)
    created_by = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name="提交用户",
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name="builds",
    )
    created_at = models.DateTimeField("提交时间", auto_now_add=True)
    updated_at = models.DateTimeField("更新时间", auto_now=True)

    class Meta:
        verbose_name = "构建任务"
        verbose_name_plural = "构建任务"
        ordering = ["-created_at"]

    def __str__(self):
        return f"{self.filename or self.uuid}（{self.status_label()}）"

    def status_label(self):
        return STATUS_LABELS.get(self.status, self.status)

    def status_badge(self):
        return STATUS_BADGE.get(self.status, "badge-secondary")

    def platform_label(self):
        return PLATFORM_LABELS.get(self.platform, self.platform or "未知平台")

    def is_finished(self):
        return self.status in ("success", "failure", "cancelled", "timed_out", "skipped")

    @property
    def github_log_url(self):
        if self.github_run_id:
            # 局部导入避免循环依赖；按任务记录的平台生成对应站点的日志链接
            from .build_backends import get_backend
            return get_backend(self.backend or 'github').log_url(self.github_run_id)
        return ""

    @property
    def backend_label(self):
        """任务所属构建平台的展示名（用于日志链接等文案）。"""
        return "Gitea Actions" if (self.backend or "github") == "gitea" else "GitHub Actions"

    @property
    def backend_badge_class(self):
        """任务所属构建平台对应的徽章样式类。"""
        return "badge-gitea" if (self.backend or "github") == "gitea" else "badge-github"

    def short_uuid(self):
        return self.uuid[:8] if len(self.uuid) >= 8 else self.uuid


class SiteSetting(models.Model):
    """后台可改的站点配置（键值存储）。

    取值优先级由 app_settings 统一处理：后台配置（本表）→ 环境变量 → 默认值，
    因此历史的环境变量部署方式继续有效。
    """

    key = models.CharField("配置项", max_length=50, primary_key=True)
    value = models.TextField("配置值", blank=True, default='')
    updated_at = models.DateTimeField("更新时间", auto_now=True)

    class Meta:
        verbose_name = "站点配置"
        verbose_name_plural = "站点配置"

    def __str__(self):
        return self.key


class SavedConfig(models.Model):
    """用户保存的客户端构建配置方案（与账号绑定，可在定制页直接载入、可导出/导入）。"""

    owner = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name="所属用户",
        on_delete=models.CASCADE,
        related_name="saved_configs",
    )
    name = models.CharField("方案名称", max_length=100)
    data = models.JSONField("配置内容", default=dict)
    created_at = models.DateTimeField("创建时间", auto_now_add=True)
    updated_at = models.DateTimeField("更新时间", auto_now=True)

    class Meta:
        verbose_name = "构建配置方案"
        verbose_name_plural = "构建配置方案"
        unique_together = [('owner', 'name')]
        ordering = ["-updated_at"]

    def __str__(self):
        return f"{self.name}（{self.owner}）"

    def platform_label(self):
        return PLATFORM_LABELS.get(self.data.get('platform', ''), '未指定平台')

    @property
    def version_label(self):
        return self.data.get('version', '') or '未指定版本'


class ApiToken(models.Model):
    """供 JSON API（如 rdgen-cli）使用的个人访问令牌"""

    key = models.CharField("令牌", max_length=64, primary_key=True, default=generate_token_key, editable=False)
    name = models.CharField("令牌名称", max_length=100, help_text="便于识别用途，例如：CI 构建机")
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        verbose_name="所属用户",
        on_delete=models.CASCADE,
        related_name="api_tokens",
    )
    is_active = models.BooleanField("启用", default=True)
    created_at = models.DateTimeField("创建时间", auto_now_add=True)
    last_used_at = models.DateTimeField("最后使用时间", null=True, blank=True)

    class Meta:
        verbose_name = "API 令牌"
        verbose_name_plural = "API 令牌"
        ordering = ["-created_at"]

    def __str__(self):
        return f"{self.name}（{self.user}）"