"""Unit tests for Redmine client, mapper, and CRM upsert."""

from __future__ import annotations

import re
from http import HTTPStatus
from unittest import mock

import pytest
import responses

from redmine_crm.crm_client import CrmClient, CrmError
from redmine_crm.mapper import enrich, map_contact
from redmine_crm.redmine_client import (
    RedmineAuthError,
    RedmineClient,
    RedmineNotFoundError,
    RedmineTransientError,
    RetryConfig,
)
from redmine_crm.sync import SyncState, run_sync


BASE_URL = "https://redmine.example.com"


@responses.activate
def test_fetch_contacts_success():
    contacts = [{"id": 1, "first_name": "Ada", "last_name": "Lovelace"}]
    responses.add(
        responses.GET,
        f"{BASE_URL}/contacts.json",
        json={"contacts": contacts},
        status=200,
    )

    client = RedmineClient(BASE_URL, "secret")
    result = client.fetch_contacts()

    assert result == contacts
    request = responses.calls[0].request
    assert request.headers["X-Redmine-API-Key"] == "secret"


@responses.activate
def test_fetch_contacts_transient_retry_then_success():
    responses.add(responses.GET, f"{BASE_URL}/contacts.json", status=503)
    responses.add(
        responses.GET,
        f"{BASE_URL}/contacts.json",
        json={"contacts": [{"id": 1, "first_name": "Grace", "last_name": "Hopper"}]},
        status=200,
    )

    client = RedmineClient(
        BASE_URL,
        "secret",
        retry=RetryConfig(max_attempts=2, base_delay_seconds=0.001),
    )
    result = client.fetch_contacts()

    assert len(result) == 1
    assert len(responses.calls) == 2


@responses.activate
def test_fetch_contacts_permanent_failure_after_retries():
    responses.add(responses.GET, f"{BASE_URL}/contacts.json", status=503)

    client = RedmineClient(
        BASE_URL,
        "secret",
        retry=RetryConfig(max_attempts=1, base_delay_seconds=0.001),
    )
    with pytest.raises(RedmineTransientError):
        client.fetch_contacts()


@responses.activate
def test_fetch_contact_not_found_raises():
    responses.add(responses.GET, f"{BASE_URL}/contacts/99.json", status=404)

    client = RedmineClient(BASE_URL, "secret")
    with pytest.raises(RedmineNotFoundError):
        client.fetch_contact(99)


@responses.activate
def test_auth_error_is_permanent():
    responses.add(responses.GET, f"{BASE_URL}/contacts.json", status=401)

    client = RedmineClient(BASE_URL, "secret")
    with pytest.raises(RedmineAuthError):
        client.fetch_contacts()


def test_map_contact_basic():
    raw = {
        "id": 7,
        "first_name": "Alan",
        "last_name": "Turing",
        "company": "Bletchley Park",
        "job_title": "Mathematician",
        "email": "alan@example.com",
        "phone": "+44 345 678",
        "website": "https://turing.example.com",
        "birthday": "1912-06-23",
        "background": "Father of computer science.",
        "tag_list": ["Hero", "pioneer"],
        "updated_at": "2026-07-01T12:00:00Z",
        "address_attributes": {
            "street": "1 Enigma Way",
            "city": "Bletchley",
            "state": "England",
            "country": "UK",
            "zip": "MK3 9HB",
        },
        "custom_fields": [
            {"name": "LinkedIn", "value": "https://linkedin.com/in/alan"},
            {"name": "Source", "value": "conference"},
        ],
    }

    mapped = map_contact(raw, base_url=BASE_URL)

    assert mapped["redmine_contact_id"] == 7
    assert mapped["full_name"] == "Alan Turing"
    assert mapped["company"] == "Bletchley Park"
    assert mapped["title"] == "Mathematician"
    assert mapped["emails"] == [{"value": "alan@example.com", "type": "work"}]
    assert mapped["urls"] == [
        {"value": "https://turing.example.com", "type": "work"},
        {"value": "https://linkedin.com/in/alan", "type": "linkedin"},
    ]
    assert mapped["address"]["city"] == "Bletchley"
    assert mapped["address"]["postal_code"] == "MK3 9HB"
    assert "Father of computer science" in mapped["notes"]
    assert "LinkedIn" not in mapped["notes"]  # promoted to URL
    assert "Source" in mapped["notes"]
    assert "from-redmine" in mapped["tags"]
    assert mapped["tags"] == sorted({"hero", "pioneer", "from-redmine"})
    assert mapped["last_redmine_update"] is not None


def test_map_company_record():
    raw = {
        "id": 8,
        "is_company": True,
        "company": "Acme Corp",
        "email": "info@acme.example.com",
        "updated_at": "2026-07-02T10:00:00Z",
    }
    mapped = map_contact(raw, base_url=BASE_URL)
    assert mapped["full_name"] == "Acme Corp"
    assert mapped["is_company"] is True


def test_enrich_fills_email_from_background():
    raw = {
        "id": 9,
        "first_name": "Linus",
        "last_name": "Torvalds",
        "background": "Reach me at linus@linux.org for kernel stuff.",
        "updated_at": "2026-07-03T10:00:00Z",
    }
    mapped = map_contact(raw, base_url=BASE_URL)
    assert mapped["emails"] == []
    enriched, meta = enrich(mapped, raw)
    assert enriched["emails"] == [{"value": "linus@linux.org", "type": "work"}]
    assert meta.email_source == "background"
    assert enriched["enriched_at"] is not None


def test_enrich_derives_company_from_domain():
    raw = {
        "id": 10,
        "first_name": "Tim",
        "last_name": "Berners-Lee",
        "email": "tim@w3.org",
        "updated_at": "2026-07-03T10:00:00Z",
    }
    mapped = map_contact(raw, base_url=BASE_URL)
    mapped.pop("company", None)
    enriched, meta = enrich(mapped, raw)
    assert enriched["company"] == "W3 Inc"
    assert meta.company_source == "domain_heuristic"


def test_crm_create_and_update_by_redmine_id():
    crm = CrmClient()
    record = {
        "redmine_contact_id": 1,
        "full_name": "Ada Lovelace",
        "emails": [{"value": "ada@example.com", "type": "work"}],
        "last_redmine_update": "2026-07-01T00:00:00Z",
    }

    result1 = crm.upsert(record)
    assert result1.created is True

    result2 = crm.upsert(record)
    assert result2.skipped_unchanged is True

    updated = dict(record)
    updated["last_redmine_update"] = "2026-07-02T00:00:00Z"
    result3 = crm.upsert(updated)
    assert result3.updated is True


def test_crm_email_fallback_links_record():
    crm = CrmClient()
    crm.upsert({
        "redmine_contact_id": 2,
        "full_name": "Old Name",
        "emails": [{"value": "match@example.com", "type": "work"}],
        "last_redmine_update": "2026-07-01T00:00:00Z",
    })

    result = crm.upsert({
        "redmine_contact_id": 3,
        "full_name": "New Name",
        "emails": [{"value": "match@example.com", "type": "work"}],
        "last_redmine_update": "2026-07-02T00:00:00Z",
    })
    assert result.updated is True


@responses.activate
def test_run_sync_end_to_end():
    contacts = [
        {
            "id": 1,
            "first_name": "Grace",
            "last_name": "Hopper",
            "email": "grace@example.com",
            "updated_at": "2026-07-04T12:00:00Z",
        }
    ]
    responses.add(
        responses.GET,
        f"{BASE_URL}/contacts.json",
        json={"contacts": contacts},
        status=200,
    )

    redmine = RedmineClient(BASE_URL, "secret")
    crm = CrmClient()
    crm._store.clear()
    state = SyncState()

    stats = run_sync(redmine, crm, state, base_url=BASE_URL, batch_size=100)

    assert stats["processed"] == 1
    assert stats["created"] == 1
    assert stats["errors"] == 0


def test_upsert_requires_redmine_id():
    crm = CrmClient()
    with pytest.raises(CrmError):
        crm.upsert({"full_name": "No ID"})


def test_map_contact_notes_include_redmine_source_url():
    raw = {
        "id": 42,
        "first_name": "Marie",
        "last_name": "Curie",
        "updated_at": "2026-07-01T00:00:00Z",
    }
    mapped = map_contact(raw, base_url=BASE_URL)
    assert re.search(r"Redmine source: https://redmine\.example\.com/contacts/42", mapped["notes"])