"""Repository functions for job_posting, application, artifact, approval, outbox, task_run."""

from __future__ import annotations

import hashlib
import json
from datetime import datetime, timezone
from typing import Any

from app.db import execute, fetch_all, fetch_one


# --- Job Posting ---

def create_job_posting(
    source: str,
    url: str,
    company: str,
    title: str,
    location: str | None = None,
    description: str = "",
    external_id: str | None = None,
    raw: dict[str, Any] | None = None,
) -> dict[str, Any]:
    row = execute(
        """
        INSERT INTO job_posting (source, external_id, url, company, title, location, description, raw)
        VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
        ON CONFLICT (source, url) DO UPDATE SET
            company = EXCLUDED.company,
            title = EXCLUDED.title,
            fetched_at = now()
        RETURNING *
        """,
        (
            source,
            external_id,
            url,
            company,
            title,
            location,
            description,
            json.dumps(raw or {}),
        ),
    )
    if row is None:
        raise RuntimeError("insert job_posting failed")
    return _normalize_posting(row)


def get_job_posting(posting_id: str) -> dict[str, Any] | None:
    row = fetch_one("SELECT * FROM job_posting WHERE id = %s", (posting_id,))
    if row is None:
        return None
    return _normalize_posting(row)


def list_postings() -> list[dict[str, Any]]:
    rows = fetch_all("SELECT * FROM job_posting ORDER BY fetched_at DESC")
    return [_normalize_posting(r) for r in rows]


def _normalize_posting(row: dict[str, Any]) -> dict[str, Any]:
    return {
        "id": str(row["id"]),
        "source": row["source"],
        "external_id": row.get("external_id"),
        "url": row["url"],
        "company": row["company"],
        "title": row["title"],
        "location": row.get("location"),
        "description": row.get("description", ""),
        "fetched_at": row["fetched_at"].isoformat() if row.get("fetched_at") else None,
    }


# --- Application ---

def create_application(job_posting_id: str) -> dict[str, Any]:
    row = execute(
        """
        INSERT INTO application (job_posting_id, state)
        VALUES (%s, 'discovered')
        RETURNING *
        """,
        (job_posting_id,),
    )
    if row is None:
        raise RuntimeError("insert application failed")
    return _normalize_application(row)


def get_application(app_id: str) -> dict[str, Any] | None:
    row = fetch_one(
        """
        SELECT a.*, j.company, j.title, j.location
        FROM application a
        JOIN job_posting j ON a.job_posting_id = j.id
        WHERE a.id = %s
        """,
        (app_id,),
    )
    if row is None:
        return None
    return _normalize_application(row)


def list_applications() -> list[dict[str, Any]]:
    rows = fetch_all(
        """
        SELECT a.*, j.company, j.title, j.location
        FROM application a
        JOIN job_posting j ON a.job_posting_id = j.id
        ORDER BY a.created_at DESC
        """
    )
    return [_normalize_application(r) for r in rows]


def update_application_state(
    app_id: str,
    new_state: str,
) -> dict[str, Any] | None:
    row = execute(
        """
        UPDATE application
        SET state = %s, state_changed_at = now()
        WHERE id = %s
        RETURNING *
        """,
        (new_state, app_id),
    )
    if row is None:
        return None
    return _normalize_application(row)


def update_application_score(
    app_id: str,
    score: float,
    rationale: dict[str, Any],
) -> dict[str, Any] | None:
    row = execute(
        """
        UPDATE application
        SET score = %s, score_rationale = %s, state = 'scored', state_changed_at = now()
        WHERE id = %s
        RETURNING *
        """,
        (score, json.dumps(rationale), app_id),
    )
    if row is None:
        return None
    return _normalize_application(row)


def _normalize_application(row: dict[str, Any]) -> dict[str, Any]:
    rationale = row.get("score_rationale")
    if rationale is not None and not isinstance(rationale, dict):
        rationale = json.loads(rationale) if isinstance(rationale, str) else rationale
    return {
        "id": str(row["id"]),
        "job_posting_id": str(row["job_posting_id"]),
        "state": row["state"],
        "score": float(row["score"]) if row.get("score") is not None else None,
        "score_rationale": rationale,
        "notes": row.get("notes"),
        "state_changed_at": row["state_changed_at"].isoformat() if row.get("state_changed_at") else None,
        "created_at": row["created_at"].isoformat() if row.get("created_at") else None,
        "company": row.get("company"),
        "title": row.get("title"),
        "location": row.get("location"),
    }


# --- Artifact ---

def create_artifact(
    application_id: str,
    kind: str,
    filename: str,
    content_bytes: bytes,
    storage_path: str,
    origin: str = "ai_reviewed",
    version: int = 1,
) -> dict[str, Any]:
    content_hash = hashlib.sha256(content_bytes).hexdigest()
    row = execute(
        """
        INSERT INTO artifact (application_id, kind, filename, content_hash, storage_path, version, origin)
        VALUES (%s, %s, %s, %s, %s, %s, %s)
        RETURNING *
        """,
        (application_id, kind, filename, content_hash, storage_path, version, origin),
    )
    if row is None:
        raise RuntimeError("insert artifact failed")
    return _normalize_artifact(row)


def list_artifacts(application_id: str) -> list[dict[str, Any]]:
    rows = fetch_all(
        "SELECT * FROM artifact WHERE application_id = %s ORDER BY created_at DESC",
        (application_id,),
    )
    return [_normalize_artifact(r) for r in rows]


def get_artifact(artifact_id: str) -> dict[str, Any] | None:
    row = fetch_one("SELECT * FROM artifact WHERE id = %s", (artifact_id,))
    if row is None:
        return None
    return _normalize_artifact(row)


def _normalize_artifact(row: dict[str, Any]) -> dict[str, Any]:
    return {
        "id": str(row["id"]),
        "application_id": str(row["application_id"]),
        "kind": row["kind"],
        "filename": row["filename"],
        "content_hash": row["content_hash"],
        "storage_path": row["storage_path"],
        "version": row["version"],
        "origin": row["origin"],
    }


# --- Approval ---

def create_approval(
    application_id: str,
    artifact_id: str,
    artifact_hash: str,
    action: str,
) -> dict[str, Any]:
    row = execute(
        """
        INSERT INTO approval (application_id, artifact_id, artifact_hash, action, expires_at)
        VALUES (%s, %s, %s, %s, now() + interval '24 hours')
        RETURNING *
        """,
        (application_id, artifact_id, artifact_hash, action),
    )
    if row is None:
        raise RuntimeError("insert approval failed")
    return _normalize_approval(row)


def get_approval(approval_id: str) -> dict[str, Any] | None:
    row = fetch_one("SELECT * FROM approval WHERE id = %s", (approval_id,))
    if row is None:
        return None
    return _normalize_approval(row)


def confirm_approval(approval_id: str) -> dict[str, Any] | None:
    row = execute(
        """
        UPDATE approval
        SET confirmed_by_user = true, confirmed_at = now()
        WHERE id = %s
        RETURNING *
        """,
        (approval_id,),
    )
    if row is None:
        return None
    return _normalize_approval(row)


def reject_approval(approval_id: str) -> dict[str, Any] | None:
    row = execute(
        """
        UPDATE approval
        SET confirmed_by_user = false, confirmed_at = now()
        WHERE id = %s
        RETURNING *
        """,
        (approval_id,),
    )
    if row is None:
        return None
    return _normalize_approval(row)


def _normalize_approval(row: dict[str, Any]) -> dict[str, Any]:
    return {
        "id": str(row["id"]),
        "application_id": str(row["application_id"]),
        "artifact_id": str(row["artifact_id"]),
        "artifact_hash": row["artifact_hash"],
        "action": row["action"],
        "confirmed_by_user": row["confirmed_by_user"],
        "confirmed_at": row["confirmed_at"].isoformat() if row.get("confirmed_at") else None,
        "expires_at": row["expires_at"].isoformat() if row.get("expires_at") else None,
        "created_at": row["created_at"].isoformat() if row.get("created_at") else None,
    }


# --- Outbox ---

def create_outbox(approval_id: str, payload: dict[str, Any]) -> dict[str, Any]:
    row = execute(
        """
        INSERT INTO outbox (approval_id, payload, status)
        VALUES (%s, %s, 'pending')
        RETURNING *
        """,
        (approval_id, json.dumps(payload)),
    )
    if row is None:
        raise RuntimeError("insert outbox failed")
    return _normalize_outbox(row)


def update_outbox_sent(outbox_id: str) -> dict[str, Any] | None:
    row = execute(
        """
        UPDATE outbox
        SET status = 'sent', sent_at = now()
        WHERE id = %s
        RETURNING *
        """,
        (outbox_id,),
    )
    if row is None:
        return None
    return _normalize_outbox(row)


def _normalize_outbox(row: dict[str, Any]) -> dict[str, Any]:
    payload = row.get("payload")
    if payload is not None and not isinstance(payload, dict):
        payload = json.loads(payload) if isinstance(payload, str) else payload
    return {
        "id": str(row["id"]),
        "approval_id": str(row["approval_id"]),
        "kind": row.get("kind", "email"),
        "payload": payload or {},
        "status": row["status"],
        "sent_at": row["sent_at"].isoformat() if row.get("sent_at") else None,
        "error": row.get("error"),
    }


# --- Task Run (telemetry) ---

def create_task_run(data: dict[str, Any]) -> dict[str, Any]:
    row = execute(
        """
        INSERT INTO task_run (task, model, provider, input_tokens, output_tokens, cost_usd, duration_ms, application_id)
        VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
        RETURNING *
        """,
        (
            data["task"],
            data["model"],
            data["provider"],
            data["input_tokens"],
            data["output_tokens"],
            data.get("cost_usd"),
            data["duration_ms"],
            data.get("application_id"),
        ),
    )
    if row is None:
        raise RuntimeError("insert task_run failed")
    return _normalize_task_run(row)


def list_task_runs() -> list[dict[str, Any]]:
    rows = fetch_all("SELECT * FROM task_run ORDER BY created_at DESC LIMIT 100")
    return [_normalize_task_run(r) for r in rows]


def _normalize_task_run(row: dict[str, Any]) -> dict[str, Any]:
    return {
        "id": str(row["id"]),
        "task": row["task"],
        "model": row["model"],
        "provider": row["provider"],
        "input_tokens": row["input_tokens"],
        "output_tokens": row["output_tokens"],
        "cost_usd": float(row["cost_usd"]) if row.get("cost_usd") is not None else None,
        "duration_ms": row["duration_ms"],
        "application_id": str(row["application_id"]) if row.get("application_id") else None,
        "created_at": row["created_at"].isoformat() if row.get("created_at") else None,
    }