from datetime import datetime, timezone
from typing import Any, Dict, List, Literal, Optional

from pydantic import BaseModel, Field, model_validator

from app.models.common import SourceMetadata


# ---------------------------------------------------------------------------
# Request models
# ---------------------------------------------------------------------------


class GenerateTextRequest(BaseModel):
    question: str = Field(..., min_length=1)
    profile: Literal["A", "B", "C"]
    label: str = ""


class EvaluatorConfig(BaseModel):
    model_name: str
    base_url: str
    api_key_env: str
    enable_thinking: bool = False


class EvaluationConfigRequest(BaseModel):
    key_questions_evaluators: List[EvaluatorConfig]
    chunk_evaluator: EvaluatorConfig
    response_evaluator: EvaluatorConfig


class EvaluateRequest(BaseModel):
    result_id: str = ""
    results: Optional["GenerateResult"] = None
    evaluation_config: EvaluationConfigRequest

    @model_validator(mode="after")
    def _require_result_source(self) -> "EvaluateRequest":
        if not self.result_id and self.results is None:
            raise ValueError("Either result_id or inline results must be provided")
        return self


# ---------------------------------------------------------------------------
# Result models (output of generation endpoints)
# ---------------------------------------------------------------------------


class ChunkEntry(BaseModel):
    chunk_index: int
    text: str
    metadata: Dict[str, Any]
    distance: float = 0.0


class SubQuestionChunks(BaseModel):
    sub_question_index: int
    sub_question_text: str
    chunks: List[ChunkEntry]


class RetrievalResult(BaseModel):
    per_sub_question: List[SubQuestionChunks]
    total_chunks_retrieved: int
    retriever_time_ms: int


class FilteredResult(BaseModel):
    per_sub_question: List[SubQuestionChunks]
    total_chunks_filtered: int
    filter_time_ms: int


class SubQuestionSources(BaseModel):
    sub_question_index: int
    sub_question_text: str
    sources: List[SourceMetadata]


class ResponseResult(BaseModel):
    final_answer: str
    sub_question_sources: List[SubQuestionSources]
    generate_time_ms: int


class InputInfo(BaseModel):
    text: str
    reference_transcript: str = ""
    audio_filename: str = ""
    audio_duration_seconds: float = 0.0
    asr_language: str = ""


class TimingInfo(BaseModel):
    decomposer_time_ms: int
    retriever_time_ms: int
    filter_time_ms: int
    generator_time_ms: int
    total_time_ms: int
    asr_time_ms: int = 0


class GenerateResult(BaseModel):
    result_id: str
    input_type: Literal["text", "audio"]
    profile: str
    label: str = ""
    created_at: str = Field(default_factory=lambda: datetime.now(timezone.utc).isoformat())
    input: InputInfo
    extracted_key_questions: List[str]
    retrieval: RetrievalResult
    filtered: FilteredResult
    response: ResponseResult
    timing: TimingInfo


# ---------------------------------------------------------------------------
# Evaluation models
# ---------------------------------------------------------------------------


class DimensionScores(BaseModel):
    dimension_1_準確性: int = Field(ge=0, le=40)
    dimension_2_完整性: int = Field(ge=0, le=25)
    dimension_3_清晰度: int = Field(ge=0, le=20)
    dimension_4_簡潔性: int = Field(ge=0, le=15)


class KeyQuestionsEvalEntry(BaseModel):
    model_name: str
    scores: DimensionScores
    total_score: int = Field(ge=0, le=100)
    max_score: int = 100
    comments: str
    thinking_trace: str
    time_ms: int


class KeyQuestionsEvalResult(BaseModel):
    evaluations: List[KeyQuestionsEvalEntry]
    average_scores: DimensionScores
    average_total: float


class AudioEvalResult(BaseModel):
    status: Literal["completed", "na"] = "completed"
    cer: Optional[float] = None
    wer: Optional[float] = None
    reference_length: int = 0
    transcribed_length: int = 0
    substitutions: int = 0
    deletions: int = 0
    insertions: int = 0
    hits: int = 0


class ChunkAccuracy(BaseModel):
    precision: float
    recall: float
    f1: float
    pipeline_chunks: int
    relevant_in_pipeline: int


class GroundTruthInfo(BaseModel):
    relevant_documents: List[str]
    relevant_chunks: List[Dict[str, Any]]
    total_relevant_chunks: int
    chunk_evaluation_time_ms: int


class SubQuestionChunkEval(BaseModel):
    sub_question_index: int
    sub_question_text: str
    ground_truth: GroundTruthInfo
    unfiltered_accuracy: ChunkAccuracy
    filtered_accuracy: ChunkAccuracy


class ChunkEvalResult(BaseModel):
    per_sub_question: List[SubQuestionChunkEval]
    overall_unfiltered: ChunkAccuracy
    overall_filtered: ChunkAccuracy


class SubQuestionResponseEval(BaseModel):
    sub_question_index: int
    sub_question_text: str
    ground_truth_response: str
    pipeline_response_section: str
    completeness_score: float
    factual_accuracy_score: float
    comments: str
    ground_truth_generation_time_ms: int
    comparison_time_ms: int


class ResponseEvalResult(BaseModel):
    per_sub_question: List[SubQuestionResponseEval]
    overall_completeness: float
    overall_factual_accuracy: float


class EvaluationTiming(BaseModel):
    audio_evaluation_time_ms: int
    key_questions_evaluation_time_ms: int
    chunk_evaluation_time_ms: int
    response_evaluation_time_ms: int
    total_evaluation_time_ms: int


class EvaluationResult(BaseModel):
    evaluation_id: str
    result_id: str
    created_at: str = Field(default_factory=lambda: datetime.now(timezone.utc).isoformat())
    status: Literal["completed", "partial", "failed"]
    audio_evaluation: Optional[AudioEvalResult] = None
    key_questions_evaluation: Optional[KeyQuestionsEvalResult] = None
    chunk_evaluation: Optional[ChunkEvalResult] = None
    response_evaluation: Optional[ResponseEvalResult] = None
    timing: EvaluationTiming


# ---------------------------------------------------------------------------
# Listing response models
# ---------------------------------------------------------------------------


class ListItemInfo(BaseModel):
    result_id: str
    input_type: str
    profile: str
    label: str
    created_at: str
    file_size_bytes: int


LIST_RESULTS_RESPONSE = List[ListItemInfo]
LIST_EVALUATIONS_RESPONSE = List[ListItemInfo]

TABLE_RESULTS_RESPONSE = ListItemInfo
TABLE_EVALUATIONS_RESPONSE = ListItemInfo