#!/usr/bin/env python3
"""Display the test coverage matrix and test catalog without running tests.

Reads test_results.json and static/test_coverage.json, then prints
the latest result for each OS + robot + test-suite combination plus
a summary of what's tested.

Usage:
    cd marionette
    python tests/show_matrix.py
"""

import json
import sys
from datetime import datetime
from pathlib import Path

RESULTS_FILE = Path(__file__).parent / "test_results.json"
WEB_COVERAGE_FILE = Path(__file__).parent.parent / "marionette" / "static" / "test_coverage.json"

OS_LIST = ["Linux", "macOS", "Windows"]
ROBOT_LIST = ["None", "Lite", "Wireless"]
SUITES = [
    ("unit", None, "Unit Tests"),
    ("e2e", "chromium", "Chromium"),
    ("e2e", "firefox", "Firefox"),
    ("e2e", "webkit", "WebKit"),
    ("hardware", None, "Hardware"),
]


def print_matrix(results: list[dict]) -> None:
    """Print the coverage matrix from a list of result entries."""
    # Build lookup: (os, robot, suite, browser) -> latest result
    latest: dict[tuple, dict] = {}
    for r in results:
        key = (r["os"], r["robot"], r["suite"], r.get("browser"))
        existing = latest.get(key)
        if existing is None or r["timestamp"] >= existing["timestamp"]:
            latest[key] = r

    # Only show columns that have at least one result
    active_suites = [
        s for s in SUITES
        if any(
            latest.get((os_name, robot, s[0], s[1]))
            for os_name in OS_LIST
            for robot in ROBOT_LIST
        )
    ]
    if not active_suites:
        active_suites = SUITES[:4]  # Show defaults even if empty

    col_w = 11
    label_w = 13

    print("Coverage Matrix (latest result per combination)\n")

    # Header row
    header = f"{'':>{label_w}} \u2502 " + " \u2502 ".join(
        f"{s[2]:^{col_w}}" for s in active_suites
    )
    print(header)

    # Separator
    sep = "\u2500" * label_w + "\u2500\u253c\u2500" + "\u2500\u253c\u2500".join(
        "\u2500" * (col_w + 1) for _ in active_suites
    )
    print(sep)

    # Data rows
    for os_name in OS_LIST:
        for robot in ROBOT_LIST:
            short = robot[:4] + "." if len(robot) > 4 else robot
            combo = f"{os_name}/{short}"
            cells = []
            for suite, browser, _ in active_suites:
                key = (os_name, robot, suite, browser)
                r = latest.get(key)
                if r is None:
                    cells.append(f"{'—':^{col_w}}")
                else:
                    dt = datetime.fromisoformat(r["timestamp"])
                    date_str = dt.strftime("%b %d")
                    icon = "\u2705" if r["status"] == "pass" else "\u274c"
                    cells.append(f"{icon + ' ' + date_str:^{col_w}}")
            row = f"{combo:>{label_w}} \u2502 " + " \u2502 ".join(cells)
            print(row)

    print()


def print_catalog(catalog: list[dict]) -> None:
    """Print a grouped test catalog summary."""
    if not catalog:
        return

    print("Test Catalog\n")

    tier_order = ["unit", "e2e", "hardware", "unknown"]
    tier_labels = {
        "unit": "Unit Tests",
        "e2e": "E2E Browser Tests",
        "hardware": "Hardware Tests",
        "unknown": "Other",
    }

    tiers: dict[str, list[dict]] = {}
    for entry in catalog:
        tiers.setdefault(entry["tier"], []).append(entry)

    for tier in tier_order:
        entries = tiers.get(tier)
        if not entries:
            continue
        total = sum(e["count"] for e in entries)
        label = tier_labels.get(tier, tier)
        print(f"  {label} — {total} tests")
        for e in entries:
            pad = max(1, 28 - len(e["class"]) - len(str(e["count"])))
            print(f"    {e['class']} ({e['count']}){' ' * pad} {e['description']}")
        print()


def main() -> None:
    if not RESULTS_FILE.exists():
        print(f"No results file found at {RESULTS_FILE}")
        print("Run tests first: python tests/run_tests.py")
        sys.exit(1)

    results = json.loads(RESULTS_FILE.read_text())
    if not results:
        print("No test results recorded yet.")
        print("Run tests first: python tests/run_tests.py")
        sys.exit(1)

    print_matrix(results)

    # Summary stats
    total_combos = len(OS_LIST) * len(ROBOT_LIST) * len(SUITES)
    tested = len({
        (r["os"], r["robot"], r["suite"], r.get("browser"))
        for r in results
    })
    print(f"Coverage: {tested}/{total_combos} combinations tested\n")

    # Show test catalog from web coverage file if available
    if WEB_COVERAGE_FILE.exists():
        try:
            coverage = json.loads(WEB_COVERAGE_FILE.read_text())
            catalog = coverage.get("test_catalog", [])
            if catalog:
                print_catalog(catalog)
        except (json.JSONDecodeError, KeyError):
            pass
    else:
        print("Tip: Run python tests/run_tests.py to generate the test catalog.\n")


if __name__ == "__main__":
    main()