from __future__ import annotations
from pydantic import BaseModel, Field
from typing import Optional, Literal, List, Dict, Any
from enum import Enum

class Severity(str, Enum):
    CRITICAL = "critical"
    HIGH = "high"
    MEDIUM = "medium"
    LOW = "low"
    INFO = "info"

class Confidence(str, Enum):
    HIGH = "high"
    MEDIUM = "medium"
    LOW = "low"

class FileRole(str, Enum):
    PRODUCTION = "production"
    TEST = "test"
    FIXTURE = "fixture"
    CI = "ci"
    CONFIG = "config"
    INFRA = "infra"
    VENDOR = "vendor"

class ScanDomain(str, Enum):
    SECRETS = "secrets"
    DEPS = "deps"
    IAC = "iac"
    SAST = "sast"
    CONFIG = "config"
    FRONTEND = "frontend"
    LLM_VULNS = "llm_vulns"
    DAST = "dast"
    CHAIN = "chain"

class TaintPath(BaseModel):
    source_file: str
    source_line: int
    source_type: str  # req.body | query_param | cookie | header | file
    intermediate_calls: List[Dict[str, Any]] = Field(default_factory=list)
    sink_file: str
    sink_line: int
    sink_type: str  # sql | exec | eval | html_render | redirect | external_request
    sanitizers_found: List[str] = Field(default_factory=list)

class Evidence(BaseModel):
    tool_call: str
    result_summary: str
    file_path: Optional[str] = None
    line_number: Optional[int] = None

class Finding(BaseModel):
    id: str = Field(default_factory=lambda: __import__("uuid").uuid4().hex)
    title: str
    description: str
    severity: Severity
    confidence: Confidence = Confidence.MEDIUM
    domain: ScanDomain
    check_id: Optional[str] = None
    check_category: Optional[str] = None
    policy_reference: Optional[str] = None
    file_path: Optional[str] = None
    line_number: Optional[int] = None
    file_role: Optional[FileRole] = None
    explanation: str = ""
    suggested_fix: str = ""
    evidence: List[Evidence] = Field(default_factory=list)
    taint_path: Optional[TaintPath] = None
    is_false_positive: bool = False
    false_positive_reason: Optional[str] = None
    reachability_unconfirmed: bool = False
    dismissed_at: Optional[str] = None
    confirmed_runtime: bool = False  # DAST confirmed
    chained_from: List[str] = Field(default_factory=list)  # IDs of contributing findings
    category: Optional[str] = None
    validity: Optional[Literal["active", "revoked", "unknown"]] = None
    secret_type: Optional[str] = None
    raw_secret_value: Optional[str] = None
    secret_value_encrypted: Optional[str] = None
    exploitable_by: Optional[str] = None  # unauthenticated | authenticated | admin
    taint_confirmed: bool = False
    verdict: Optional[str] = None
    validation_reason: Optional[str] = None
    requires_llm_gate: bool = Field(default=False)

    @property
    def file(self) -> Optional[str]:
        return self.file_path

    @file.setter
    def file(self, value: Optional[str]):
        self.file_path = value

class ScanResult(BaseModel):
    scan_id: str
    status: Literal["completed", "failed", "partial"]
    score: int
    findings: List[Finding]
    findings_count: int
    chain_findings: List[Finding] = Field(default_factory=list)
    scan_metadata: Dict[str, Any] = Field(default_factory=dict)
    suppressed_findings: List[Finding] = Field(default_factory=list)

class ScanRequest(BaseModel):
    repo_url: Optional[str] = None
    local_files: Optional[List[Dict[str, str]]] = None  # [{path, content}, ...]
    runtime_url: Optional[str] = None
    scan_id: Optional[str] = None
    project_id: Optional[str] = None
    user_id: Optional[str] = None
    plan_tier: Literal["free", "pro", "team", "enterprise"] = "free"
    enable_dast: bool = False
    github_token: Optional[str] = None