from typing import List, Dict, Optional
from enum import Enum
from pydantic import BaseModel, Field  # , EmailStr


class MatchLabel(str, Enum):
    OVER_QUALIFIED = "Over Qualified"
    MATCHED = "Matched"
    PARTIALLY_MATCHED = "Partially Matched"
    NOT_MATCHED = "Not Matched"


class ApplicantEducation(BaseModel):
    degree: str = Field(..., description="The degree obtained by the applicant")
    institution: str = Field(
        ..., description="The institution where the degree was obtained"
    )
    graduation_date: str = Field(
        ..., description="The date of graduation in YYYY-MM format"
    )


class ApplicantSkills(BaseModel):
    skill_name: str = Field(..., description="The name of the skill")
    proficiency: str = Field(
        ...,
        description="The proficiency level of the skill (e.g., Advanced if more than 5 years of experience, intermediate if more than 2 years of experience, otherwise Beginner)",
    )
    years_of_experience: int = Field(
        ..., description="Number of years of experience with the skill"
    )


class ApplicantExperience(BaseModel):
    job_title: str = Field(
        ..., description="The title of the job held by the applicant"
    )
    company: str = Field(..., description="The company where the applicant worked")
    start_date: str = Field(
        ..., description="The start date of the job in YYYY-MM format"
    )
    end_date: str = Field(..., description="The end date of the job in YYYY-MM format")
    description: str = Field(
        ...,
        description="A brief description of the job responsibilities and achievements",
    )
    years_of_experience: int = Field(
        ...,
        description="Number of years of experience in this role. Rounded to the nearest integer, e.g., 1.5 years becomes 2 years",
    )


class ApplicantDocument(BaseModel):
    fullname: str = Field(..., description="The full name of the applicant")
    email: str = Field(..., description="The email address of the applicant")
    phone: str = Field(..., description="The phone number of the applicant")
    description: str = Field(
        ..., description="A brief description or summary of the applicant's profile"
    )
    skills: list[ApplicantSkills] = Field(
        ..., description="A list of skills possessed by the applicant"
    )
    experiences: list[ApplicantExperience] = Field(
        ..., description="A list of work experiences of the applicant"
    )
    education: list[ApplicantEducation] = Field(
        ..., description="A list of educational qualifications of the applicant"
    )


class JobDocument(BaseModel):
    title: str = Field(..., description="The title of the job position")
    responsibilities: list[str] = Field(
        ...,
        description="A list of responsibilities associated with the job position",
    )
    requirements: list[str] = Field(
        ..., description="A list of requirements for the job position"
    )
    location: Optional[str] = Field(None, description="The location of the job")
    salary_range: Optional[str] = Field(
        None, description="The salary range for the job position, if applicable"
    )


class ApplicantEvaluation(BaseModel):
    match_score: float = Field(
        ...,
        description="The match score between the applicant and the job position, ranging from 0 to 1",
    )
    match_reasoning: str = Field(
        ...,
        description="The reasoning behind the match score, explaining how the applicant's qualifications align with the job requirements",
    )
    match_labels: MatchLabel = Field(
        ...,
        description="The label indicating the match status between the applicant and the job position",
    )


class DocumentAnnotationResponse(BaseModel):
    applicant: ApplicantDocument = Field(
        ..., description="The applicant's information extracted from the CV"
    )
    job: JobDocument = Field(
        ..., description="The job information extracted from the job description"
    )
    match_score: float = Field(
        ...,
        description="The match score between the applicant and the job position, ranging from 0 to 1",
    )
    match_reasoning: str = Field(
        ...,
        description="The reasoning behind the match score, explaining how the applicant's qualifications align with the job requirements",
    )
    match_labels: MatchLabel = Field(
        ...,
        description="The label indicating the match status between the applicant and the job position",
    )


class DocumentAnnotationRequest(BaseModel):
    applicant_cv: str = Field(..., description="Base64 encoded CV of the applicant")
    job_description: str = Field(..., description="Base64 encoded job description")
    applicant_email: Optional[str] = Field(
        None, description="Email address of the applicant, if available"
    )
    applicant_phone: Optional[str] = Field(
        None, description="Phone number of the applicant, if available"
    )
    applicant_fullname: Optional[str] = Field(
        None, description="Full name of the applicant, if available"
    )