import pytest
from fastapi import HTTPException

from api.v1.modules.crm.opportunities import service
from api.v1.modules.crm.opportunities.dto import OpportunityCreate, OpportunityUpdate
from api.v1.modules.crm.pipelines import service as pipelines_service
from api.v1.modules.crm.pipelines.dto import PipelineCreate, StageCreate

T, C = 1, 1


def _pipeline_with_stages(db):
    pipeline = pipelines_service.create_pipeline(db, PipelineCreate(name="Ventas", is_default=True), T, C)
    s_open = pipelines_service.create_stage(
        db, StageCreate(pipeline_id=pipeline.id, name="Prospecto", position=0, probability=10), T, C
    )
    s_won = pipelines_service.create_stage(
        db, StageCreate(pipeline_id=pipeline.id, name="Ganada", position=1, probability=100, is_won=True), T, C
    )
    s_lost = pipelines_service.create_stage(
        db, StageCreate(pipeline_id=pipeline.id, name="Perdida", position=2, is_lost=True), T, C
    )
    return pipeline, s_open, s_won, s_lost


def test_create_opportunity(db):
    pipeline, s_open, _, _ = _pipeline_with_stages(db)
    opp = service.create_opportunity(
        db,
        OpportunityCreate(name="Licencia Aduanasoft", pipeline_id=pipeline.id, stage_id=s_open.id, amount=15000),
        T, C,
    )
    assert opp.status == "open"
    assert opp.currency == "MXN"


def test_move_to_won_closes_and_sets_probability(db):
    pipeline, s_open, s_won, _ = _pipeline_with_stages(db)
    opp = service.create_opportunity(db, OpportunityCreate(name="Deal", pipeline_id=pipeline.id, stage_id=s_open.id), T, C)
    moved = service.move_opportunity(db, opp.id, s_won.id, T, C)
    assert moved.status == "won"
    assert moved.probability == 100
    assert moved.closed_at is not None
    assert moved.stage_id == s_won.id


def test_move_to_lost(db):
    pipeline, s_open, _, s_lost = _pipeline_with_stages(db)
    opp = service.create_opportunity(db, OpportunityCreate(name="Deal", pipeline_id=pipeline.id, stage_id=s_open.id), T, C)
    moved = service.move_opportunity(db, opp.id, s_lost.id, T, C)
    assert moved.status == "lost"
    assert moved.probability == 0
    assert moved.closed_at is not None


def test_move_back_to_open_reopens(db):
    pipeline, s_open, s_won, _ = _pipeline_with_stages(db)
    opp = service.create_opportunity(db, OpportunityCreate(name="Deal", pipeline_id=pipeline.id, stage_id=s_open.id), T, C)
    service.move_opportunity(db, opp.id, s_won.id, T, C)
    reopened = service.move_opportunity(db, opp.id, s_open.id, T, C)
    assert reopened.status == "open"
    assert reopened.probability == 10
    assert reopened.closed_at is None


def test_create_rejects_unknown_account(db):
    with pytest.raises(HTTPException) as exc:
        service.create_opportunity(db, OpportunityCreate(name="X", account_id=999), T, C)
    assert exc.value.status_code == 422


def test_only_one_default_pipeline(db):
    pipelines_service.create_pipeline(db, PipelineCreate(name="P1", is_default=True), T, C)
    pipelines_service.create_pipeline(db, PipelineCreate(name="P2", is_default=True), T, C)
    pipelines = pipelines_service.get_pipelines(db, T, C)
    defaults = [p for p in pipelines if p.is_default]
    assert len(defaults) == 1 and defaults[0].name == "P2"


def test_create_in_won_stage_derives_state(db):
    pipeline, _s_open, s_won, _ = _pipeline_with_stages(db)
    opp = service.create_opportunity(
        db,
        OpportunityCreate(name="Directo a ganada", pipeline_id=pipeline.id, stage_id=s_won.id, amount=500),
        T, C,
    )
    assert opp.status == "won"
    assert opp.probability == 100
    assert opp.closed_at is not None


def test_update_to_lost_stage_derives_state(db):
    pipeline, s_open, _s_won, s_lost = _pipeline_with_stages(db)
    opp = service.create_opportunity(db, OpportunityCreate(name="Z", pipeline_id=pipeline.id, stage_id=s_open.id), T, C)
    updated = service.update_opportunity(db, opp.id, OpportunityUpdate(stage_id=s_lost.id), T, C)
    assert updated.status == "lost"
    assert updated.probability == 0
    assert updated.closed_at is not None


def test_create_rejects_stage_from_other_pipeline(db):
    pipeline, _s_open, _s_won, _s_lost = _pipeline_with_stages(db)
    other = pipelines_service.create_pipeline(db, PipelineCreate(name="Otro"), T, C)
    other_stage = pipelines_service.create_stage(db, StageCreate(pipeline_id=other.id, name="X"), T, C)
    with pytest.raises(HTTPException) as exc:
        service.create_opportunity(
            db, OpportunityCreate(name="Y", pipeline_id=pipeline.id, stage_id=other_stage.id), T, C
        )
    assert exc.value.status_code == 422