#!/usr/bin/env python3
"""
Post-import QA validation for vehicle dropdown data.
Runs basic duplicate and range checks against the motovaultpro Postgres container.
"""

import os
import subprocess
import sys


def run_psql(query: str) -> str:
    cmd = [
        "docker",
        "exec",
        "mvp-postgres",
        "psql",
        "-U",
        "postgres",
        "-d",
        "motovaultpro",
        "-At",
        "-c",
        query,
    ]
    return subprocess.check_output(cmd, text=True)


def check_container():
    try:
        subprocess.check_output(["docker", "ps"], text=True)
    except Exception:
        print("❌ Docker not available.")
        sys.exit(1)

    try:
        containers = subprocess.check_output(
            ["docker", "ps", "--filter", "name=mvp-postgres", "--format", "{{.Names}}"],
            text=True,
        ).strip()
        if not containers:
            print("❌ mvp-postgres container not running.")
            sys.exit(1)
    except Exception as exc:
        print(f"❌ Failed to check containers: {exc}")
        sys.exit(1)

def check_invalid_combinations():
    """Verify known invalid combinations do not exist."""
    invalid_combos = [
        (1992, "Chevrolet", "Corvette", "Z06"),  # Z06 started 2001
        (2000, "Chevrolet", "Corvette", "35th Anniversary Edition"),  # Was 1988
        (2000, "Chevrolet", "Corvette", "Stingray"),  # Stingray started 2014
        (1995, "Ford", "Mustang", "Mach-E"),  # Mach-E is 2021+
        (2020, "Tesla", "Cybertruck", "Base"),  # Not in production until later
    ]

    issues = []
    for year, make, model, trim in invalid_combos:
        query = f"""
            SELECT COUNT(*) FROM vehicle_options
            WHERE year = {year}
            AND make = '{make}'
            AND model = '{model}'
            AND trim = '{trim}'
        """
        count = int(run_psql(query).strip())
        if count > 0:
            issues.append(f"Invalid combo found: {year} {make} {model} {trim}")

    return issues

def check_trim_coverage():
    """Report on trim coverage statistics."""
    query = """
        SELECT
            COUNT(DISTINCT (year, make, model)) as total_models,
            COUNT(DISTINCT (year, make, model)) FILTER (WHERE trim = 'Base') as base_only,
            COUNT(DISTINCT (year, make, model)) FILTER (WHERE trim != 'Base') as has_specific_trims
        FROM vehicle_options
    """
    result = run_psql(query).strip()
    print(f"Trim coverage (total/base_only/has_specific_trims): {result}")


def main():
    check_container()

    print("🔍 Running QA checks...\n")

    queries = {
        "engine_duplicate_names": """
            SELECT COUNT(*) FROM (
                SELECT LOWER(name) as n, COUNT(*) c
                FROM engines
                GROUP BY 1 HAVING COUNT(*) > 1
            ) t;
        """,
        "transmission_duplicate_types": """
            SELECT COUNT(*) FROM (
                SELECT LOWER(type) as t, COUNT(*) c
                FROM transmissions
                GROUP BY 1 HAVING COUNT(*) > 1
            ) t;
        """,
        "vehicle_option_duplicates": """
            SELECT COUNT(*) FROM (
                SELECT year, make, model, trim, engine_id, transmission_id, COUNT(*) c
                FROM vehicle_options
                GROUP BY 1,2,3,4,5,6 HAVING COUNT(*) > 1
            ) t;
        """,
        "year_range": """
            SELECT MIN(year) || ' - ' || MAX(year) FROM vehicle_options;
        """,
        "year_range_valid": """
            SELECT COUNT(*) FROM (
              SELECT 1 FROM vehicle_options WHERE year < 2015 OR year > 2022 LIMIT 1
            ) t;
        """,
        "counts": """
            SELECT
              (SELECT COUNT(*) FROM engines) AS engines,
              (SELECT COUNT(*) FROM transmissions) AS transmissions,
              (SELECT COUNT(*) FROM vehicle_options) AS vehicle_options;
        """,
        "cross_join_gaps": """
            SELECT COUNT(*) FROM (
              SELECT base.year, base.make, base.model, base.trim, e.engine_id, t.transmission_id
              FROM (
                SELECT DISTINCT year, make, model, trim FROM vehicle_options
              ) base
              JOIN (
                SELECT DISTINCT year, make, model, trim, engine_id FROM vehicle_options
              ) e ON base.year = e.year AND base.make = e.make AND base.model = e.model AND base.trim = e.trim
              JOIN (
                SELECT DISTINCT year, make, model, trim, transmission_id FROM vehicle_options
              ) t ON base.year = t.year AND base.make = t.make AND base.model = t.model AND base.trim = t.trim
              EXCEPT
              SELECT year, make, model, trim, engine_id, transmission_id FROM vehicle_options
            ) gap;
        """,
    }

    results = {}
    for key, query in queries.items():
        try:
            results[key] = run_psql(query).strip()
        except subprocess.CalledProcessError as exc:
            print(f"❌ Query failed ({key}): {exc}")
            sys.exit(1)

    issues_found = False

    print(f"Engine duplicate names: {results['engine_duplicate_names']}")
    print(f"Transmission duplicate types: {results['transmission_duplicate_types']}")
    print(f"Vehicle option duplicates: {results['vehicle_option_duplicates']}")
    print(f"Year range: {results['year_range']}")
    print(f"Out-of-range years (should be 0): {results['year_range_valid']}")
    print(f"Counts (engines, transmissions, vehicle_options): {results['counts']}")
    print(f"Cross-join gaps (should be 0 to avoid impossible pairs): {results['cross_join_gaps']}")

    if (
        results["engine_duplicate_names"] != "0"
        or results["transmission_duplicate_types"] != "0"
        or results["vehicle_option_duplicates"] != "0"
        or results["year_range_valid"] != "0"
        or results["cross_join_gaps"] != "0"
    ):
        issues_found = True

    invalids = check_invalid_combinations()
    if invalids:
        issues_found = True
        print("\n❌ Invalid combinations detected:")
        for issue in invalids:
            print(f" - {issue}")
    else:
        print("\n✅ No known invalid year/make/model/trim combos found.")

    check_trim_coverage()

    if not issues_found:
        print("\n✅ QA checks passed.")
    else:
        print("\n❌ QA checks found issues.")


if __name__ == "__main__":
    main()