const fullData = [
    { x: new Date('2025-03-05'), y: 6.34 },
    { x: new Date('2025-03-06'), y: 6.44 },
    { x: new Date('2025-03-07'), y: 6.37 },
    { x: new Date('2025-03-08'), y: 6.43 },
    { x: new Date('2025-03-10'), y: 6.41 },
    { x: new Date('2025-03-11'), y: 6.37 },
    { x: new Date('2025-03-12'), y: 6.45 },
    { x: new Date('2025-03-13'), y: 6.45 },
    { x: new Date('2025-03-14'), y: 6.41 },
    { x: new Date('2025-03-15'), y: 6.45 },
    { x: new Date('2025-03-16'), y: 6.45 },
    { x: new Date('2025-03-17'), y: 6.45 },
    { x: new Date('2025-03-18'), y: 6.46 },
    { x: new Date('2025-03-19'), y: 6.53 },
    { x: new Date('2025-03-20'), y: 6.51 },
    { x: new Date('2025-03-21'), y: 6.44 },
    { x: new Date('2025-03-22'), y: 6.46 },
    { x: new Date('2025-03-23'), y: 6.46 },
    { x: new Date('2025-03-24'), y: 6.47 },
    { x: new Date('2025-03-25'), y: 6.51 },
    { x: new Date('2025-03-26'), y: 6.51 },
    { x: new Date('2025-03-27'), y: 6.49 },
    { x: new Date('2025-03-28'), y: 6.52 },
    { x: new Date('2025-03-29'), y: 6.50 },
    { x: new Date('2025-03-30'), y: 6.50 },
    { x: new Date('2025-03-31'), y: 6.49 },
    { x: new Date('2025-04-01'), y: 6.48 },
    { x: new Date('2025-04-02'), y: 6.47 },
    { x: new Date('2025-04-03'), y: 6.45 },
    { x: new Date('2025-04-04'), y: 6.45 },
    { x: new Date('2025-04-05'), y: 6.40 },
    { x: new Date('2025-04-06'), y: 6.40 },
    { x: new Date('2025-04-07'), y: 6.32 },
    { x: new Date('2025-04-08'), y: 6.39 },
    { x: new Date('2025-04-09'), y: 6.38 },
    { x: new Date('2025-04-10'), y: 6.39 },
    { x: new Date('2025-04-11'), y: 6.43 },
    { x: new Date('2025-04-12'), y: 6.47 },
    { x: new Date('2025-04-13'), y: 6.47 },
    { x: new Date('2025-04-14'), y: 6.48 },
    { x: new Date('2025-04-15'), y: 6.48 },
    { x: new Date('2025-04-16'), y: 6.45 },
    { x: new Date('2025-04-17'), y: 6.47 },
    { x: new Date('2025-04-18'), y: 6.46 },
    { x: new Date('2025-04-19'), y: 6.46 },
    { x: new Date('2025-04-20'), y: 6.46 },
    { x: new Date('2025-04-21'), y: 6.46 },
    { x: new Date('2025-04-22'), y: 6.48 },
    { x: new Date('2025-04-23'), y: 6.44 },
    { x: new Date('2025-04-24'), y: 6.47 },
    { x: new Date('2025-04-25'), y: 6.49 },
    { x: new Date('2025-04-26'), y: 6.53 },
    { x: new Date('2025-04-27'), y: 6.53 },
    { x: new Date('2025-04-28'), y: 6.53 },
    { x: new Date('2025-05-02'), y: 6.54 },
    { x: new Date('2025-05-03'), y: 6.57 },
    { x: new Date('2025-05-05'), y: 6.56 },
    { x: new Date('2025-05-06'), y: 6.56 },
    { x: new Date('2025-05-07'), y: 6.50 },
    { x: new Date('2025-05-08'), y: 6.52 },
    { x: new Date('2025-05-09'), y: 6.56 },
    { x: new Date('2025-05-10'), y: 6.55 },
    { x: new Date('2025-05-11'), y: 6.55 },
    { x: new Date('2025-05-12'), y: 6.56 },
    { x: new Date('2025-05-13'), y: 6.58 },
    { x: new Date('2025-05-14'), y: 6.60 },
    { x: new Date('2025-05-15'), y: 6.58 },
    { x: new Date('2025-05-16'), y: 6.54 },
    { x: new Date('2025-05-17'), y: 6.54 },
    { x: new Date('2025-05-19'), y: 6.52 },
    { x: new Date('2025-05-20'), y: 6.54 },
    { x: new Date('2025-05-21'), y: 6.53 },
    { x: new Date('2025-05-22'), y: 6.54 },
    { x: new Date('2025-05-24'), y: 6.52 },
    { x: new Date('2025-05-26'), y: 6.53 },
    { x: new Date('2025-05-27'), y: 6.53 },
    { x: new Date('2025-05-29'), y: 6.56 },
    { x: new Date('2025-06-02'), y: 6.55 },
    { x: new Date('2025-06-06'), y: 6.61 },
    { x: new Date('2025-06-10'), y: 6.65 },
    { x: new Date('2025-06-11'), y: 6.67 },
    { x: new Date('2025-06-12'), y: 6.70 },
    { x: new Date('2025-06-14'), y: 6.69 },
    { x: new Date('2025-06-15'), y: 6.69 },
    { x: new Date('2025-06-16'), y: 6.71 },
    { x: new Date('2025-06-17'), y: 6.73 },
    { x: new Date('2025-06-18'), y: 6.73 },
    { x: new Date('2025-06-20'), y: 6.73 },
    { x: new Date('2025-06-21'), y: 6.76 },
    { x: new Date('2025-06-22'), y: 6.76 },
    { x: new Date('2025-06-23'), y: 6.77 },
    { x: new Date('2025-06-24'), y: 6.81 },
    { x: new Date('2025-06-25'), y: 6.78 },
    { x: new Date('2025-06-26'), y: 6.83 },
    { x: new Date('2025-06-27'), y: 6.82 },
    { x: new Date('2025-06-28'), y: 6.84 },
    { x: new Date('2025-06-29'), y: 6.84 },
    { x: new Date('2025-06-30'), y: 6.84 },
    { x: new Date('2025-07-01'), y: 6.84 },
    { x: new Date('2025-07-02'), y: 6.85 },
    { x: new Date('2025-07-04'), y: 6.90 },
    { x: new Date('2025-07-05'), y: 6.90 },
    { x: new Date('2025-07-06'), y: 6.90 },
    { x: new Date('2025-07-07'), y: 6.90 },
    { x: new Date('2025-07-08'), y: 6.94 },
    { x: new Date('2025-07-09'), y: 6.97 },
    { x: new Date('2025-07-10'), y: 6.95 },
    { x: new Date('2025-07-11'), y: 6.9490 },
    { x: new Date('2025-07-12'), y: 6.97 },
    { x: new Date('2025-07-13'), y: 6.9733 },
    { x: new Date('2025-07-14'), y: 6.9673 },
    { x: new Date('2025-07-15'), y: 6.985 },
    { x: new Date('2025-07-16'), y: 6.9985 },
    { x: new Date('2025-07-17'), y: 6.9943 },
    { x: new Date('2025-07-19'), y: 7.0214 },
    { x: new Date('2025-07-20'), y: 7.0221 },
    { x: new Date('2025-07-21'), y: 7.0181 },
    { x: new Date('2025-07-22'), y: 6.9968 },
    { x: new Date('2025-07-23'), y: 6.9997 },
    { x: new Date('2025-07-24'), y: 6.9958 },
    { x: new Date('2025-07-25'), y: 7.0287 },
    { x: new Date('2025-07-26'), y: 7.0597 },
    { x: new Date('2025-07-27'), y: 7.0591 },
    { x: new Date('2025-07-29'), y: 7.0128 },
    { x: new Date('2025-07-30'), y: 6.9718 },
    { x: new Date('2025-07-31'), y: 6.9467 },
    { x: new Date('2025-08-01'), y: 6.9939 },
    { x: new Date('2025-08-02'), y: 6.9678 },
    { x: new Date('2025-08-03'), y: 6.9688 },
    { x: new Date('2025-08-04'), y: 6.9483 },
    { x: new Date('2025-08-05'), y: 6.9274 },
    { x: new Date('2025-08-07'), y: 6.9790 },
    { x: new Date('2025-08-08'), y: 7.0076 },
    { x: new Date('2025-08-09'), y: 7.0410 },
    { x: new Date('2025-08-10'), y: 7.0395 },
    { x: new Date('2025-08-11'), y: 7.0375 },
    { x: new Date('2025-08-12'), y: 7.0282 },
    { x: new Date('2025-08-13'), y: 7.0499 },
    { x: new Date('2025-08-14'), y: 7.0482 },
    { x: new Date('2025-08-15'), y: 7.0161 },
    { x: new Date('2025-08-16'), y: 7.0339 },
    { x: new Date('2025-08-18'), y: 7.0394 },
    { x: new Date('2025-08-19'), y: 7.0434 },
    { x: new Date('2025-08-20'), y: 7.0416 },
    { x: new Date('2025-08-21'), y: 7.0121 },
    { x: new Date('2025-08-22'), y: 7.0109 },
    { x: new Date('2025-08-23'), y: 7.0128 },
    { x: new Date('2025-08-24'), y: 7.015 },
    { x: new Date('2025-08-25'), y: 7.0176 },
    { x: new Date('2025-08-26'), y: 7.0106 },
    { x: new Date('2025-08-27'), y: 6.9983 },
    { x: new Date('2025-08-28'), y: 6.9909 },
    { x: new Date('2025-08-29'), y: 6.99 },
    { x: new Date('2025-08-30'), y: 7.0142 },
    { x: new Date('2025-08-31'), y: 7.0127 },
    { x: new Date('2025-09-01'), y: 7.0342 },
    { x: new Date('2025-09-02'), y: 7.0563 },
    { x: new Date('2025-09-03'), y: 7.0602 },
    { x: new Date('2025-09-04'), y: 7.0706 },
    { x: new Date('2025-09-05'), y: 7.0721 },
    { x: new Date('2025-09-06'), y: 7.0838 },
    { x: new Date('2025-09-07'), y: 7.0838 },
    { x: new Date('2025-09-08'), y: 7.1098 },
    { x: new Date('2025-09-09'), y: 7.1202 },
    { x: new Date('2025-09-10'), y: 7.0902 },
    { x: new Date('2025-09-11'), y: 7.0739 },
    { x: new Date('2025-09-12'), y: 7.0903 },
    { x: new Date('2025-09-13'), y: 7.1187 },
    { x: new Date('2025-09-14'), y: 7.1198 },
    { x: new Date('2025-09-15'), y: 7.1213 },
    { x: new Date('2025-09-16'), y: 7.1267 },
    { x: new Date('2025-09-17'), y: 7.1395 },
    { x: new Date('2025-09-18'), y: 7.1321 },
    { x: new Date('2025-09-19'), y: 7.1699 },
    { x: new Date('2025-09-20'), y: 7.1596 },
    { x: new Date('2025-09-21'), y: 7.1589 },
    { x: new Date('2025-09-22'), y: 7.1517 },
    { x: new Date('2025-09-23'), y: 7.1841 },
    { x: new Date('2025-09-24'), y: 7.1914 },
    { x: new Date('2025-09-25'), y: 7.1874 },
    { x: new Date('2025-09-26'), y: 7.1836 },
    { x: new Date('2025-09-27'), y: 7.1972 },
    { x: new Date('2025-09-28'), y: 7.1971 },
    { x: new Date('2025-09-29'), y: 7.1955 },
    { x: new Date('2025-09-30'), y: 7.1722 },
    { x: new Date('2025-10-01'), y: 7.1369 },
    { x: new Date('2025-10-02'), y: 7.1115 },
    { x: new Date('2025-10-03'), y: 7.1099 },
    { x: new Date('2025-10-04'), y: 7.1337 },
    { x: new Date('2025-10-05'), y: 7.1323 },
    { x: new Date('2025-10-06'), y: 7.1851 },
    { x: new Date('2025-10-06'), y: 7.1851 },
    { x: new Date('2025-10-07'), y: 7.2334 },
    { x: new Date('2025-10-08'), y: 7.2452 },
    { x: new Date('2025-10-09'), y: 7.2778 },
    { x: new Date('2025-10-10'), y: 7.2749 },
    { x: new Date('2025-10-11'), y: 7.2491 },
    { x: new Date('2025-10-12'), y: 7.2502 },
    { x: new Date('2025-10-13'), y: 7.2533 },
    { x: new Date('2025-10-14'), y: 7.2445 },
    { x: new Date('2025-10-15'), y: 7.237 },
    { x: new Date('2025-10-16'), y: 7.2459 },
    { x: new Date('2025-10-17'), y: 7.2451 },
    { x: new Date('2025-10-18'), y: 7.229 },
    { x: new Date('2025-10-20'), y: 7.2268 },
    { x: new Date('2025-10-21'), y: 7.2324 },
    { x: new Date('2025-10-22'), y: 7.2512 },
    { x: new Date('2025-10-23'), y: 7.2528 },
    { x: new Date('2025-10-24'), y: 7.2847 },
    { x: new Date('2025-10-25'), y: 7.3022 },
    { x: new Date('2025-10-26'), y: 7.3022 },
    { x: new Date('2025-10-27'), y: 7.3022 },
    { x: new Date('2025-10-28'), y: 7.3173 },
    { x: new Date('2025-10-29'), y: 7.3161 },
    { x: new Date('2025-10-30'), y: 7.2875 },
    { x: new Date('2025-10-31'), y: 7.2745 },
    { x: new Date('2025-11-01'), y: 7.31359496 },
    { x: new Date('2025-11-02'), y: 7.3131 },
    { x: new Date('2025-11-03'), y: 7.307 },
    { x: new Date('2025-11-04'), y: 7.2987 },
    { x: new Date('2025-11-05'), y: 7.243 },
    { x: new Date('2025-11-06'), y: 7.2616 },
    { x: new Date('2025-11-07'), y: 7.26577719 },
    { x: new Date('2025-11-08'), y: 7.2655 },
    { x: new Date('2025-11-09'), y: 7.2881 },
    { x: new Date('2025-11-10'), y: 7.2885 },
    { x: new Date('2025-11-11'), y: 7.2969 },
    { x: new Date('2025-11-12'), y: 7.3338 },
    { x: new Date('2025-11-13'), y: 7.3557 },
    { x: new Date('2025-11-14'), y: 7.3954 },
    { x: new Date('2025-11-15'), y: 7.4288 },
    { x: new Date('2025-11-16'), y: 7.4266 },
    { x: new Date('2025-11-17'), y: 7.4266 },
    { x: new Date('2025-11-18'), y: 7.4283 },
    { x: new Date('2025-11-19'), y: 7.439 },
    { x: new Date('2025-11-20'), y: 7.4447 },
    { x: new Date('2025-11-21'), y: 7.4885 },
    { x: new Date('2025-11-22'), y: 7.5051 },
    { x: new Date('2025-11-23'), y: 7.4446 },
    { x: new Date('2025-11-24'), y: 7.4446 },
    { x: new Date('2025-11-25'), y: 7.4809 },
    { x: new Date('2025-11-26'), y: 7.4809 },
    { x: new Date('2025-11-27'), y: 7.4761 },
    { x: new Date('2025-11-28'), y: 7.4973 },
    { x: new Date('2025-11-29'), y: 7.4962 },
    { x: new Date('2025-11-30'), y: 7.4899 },
    { x: new Date('2025-12-01'), y: 7.4855 },
    { x: new Date('2025-12-02'), y: 7.4671 },
    { x: new Date('2025-12-03'), y: 7.4977 },
    { x: new Date('2025-12-04'), y: 7.5096 },
    { x: new Date('2025-12-05'), y: 7.4659 },
    { x: new Date('2025-12-06'), y: 7.4671 },
    { x: new Date('2025-12-07'), y: 7.4689 },
    { x: new Date('2025-12-08'), y: 7.4653 },
    { x: new Date('2025-12-09'), y: 7.471 },
    { x: new Date('2025-12-10'), y: 7.5095 },
    { x: new Date('2025-12-11'), y: 7.5169 },
    { x: new Date('2025-12-12'), y: 7.5316 },
    { x: new Date('2025-12-13'), y: 7.5419 },
    { x: new Date('2025-12-14'), y: 7.5422 },
    { x: new Date('2025-12-15'), y: 7.5388 },
    { x: new Date('2025-12-16'), y: 7.4997 },
    { x: new Date('2025-12-17'), y: 7.4814 },
    { x: new Date('2025-12-18'), y: 7.492 },
    { x: new Date('2025-12-19'), y: 7.4877 },
    { x: new Date('2025-12-20'), y: 7.5788 },
    { x: new Date('2025-12-21'), y: 7.5777 },
    { x: new Date('2025-12-22'), y: 7.587 },
    { x: new Date('2025-12-23'), y: 7.5885 },
    { x: new Date('2025-12-24'), y: 7.5712 },
    { x: new Date('2025-12-25'), y: 7.5674 },
    { x: new Date('2025-12-26'), y: 7.5628 },
    { x: new Date('2025-12-27'), y: 7.5931 },
    { x: new Date('2025-12-29'), y: 7.5974 },
    { x: new Date('2025-12-30'), y: 7.5958 },
    { x: new Date('2025-12-31'), y: 7.5724 },
    { x: new Date('2026-01-01'), y: 7.5791 },
    { x: new Date('2026-01-02'), y: 7.6026 },
    { x: new Date('2026-01-03'), y: 7.6146 },
    { x: new Date('2026-01-04'), y: 7.6117 },
    { x: new Date('2026-01-05'), y: 7.6124 },
    { x: new Date('2026-01-06'), y: 7.6073 },
    { x: new Date('2026-01-07'), y: 7.5764 },
    { x: new Date('2026-01-08'), y: 7.5742 },
    { x: new Date('2026-01-09'), y: 7.5403 },
    { x: new Date('2026-01-10'), y: 7.5345 },
    { x: new Date('2026-01-11'), y: 7.5565 },
    { x: new Date('2026-01-12'), y: 7.5573 },
    { x: new Date('2026-01-13'), y: 7.5661 },
    { x: new Date('2026-01-14'), y: 7.5956 },
    { x: new Date('2026-01-15'), y: 7.6423 },
    { x: new Date('2026-01-16'), y: 7.6163 },
    { x: new Date('2026-01-17'), y: 7.5877 },
    { x: new Date('2026-01-18'), y: 7.5592 },
    { x: new Date('2026-01-19'), y: 7.5596 },
    { x: new Date('2026-01-20'), y: 7.5443 },
    { x: new Date('2026-01-21'), y: 7.5681 },
    { x: new Date('2026-01-22'), y: 7.6144 },
    { x: new Date('2026-01-23'), y: 7.6036 },
    { x: new Date('2026-01-24'), y: 7.6591 },
    { x: new Date('2026-01-25'), y: 7.6152 },
    { x: new Date('2026-01-26'), y: 7.628 },
    { x: new Date('2026-01-27'), y: 7.5995 },
    { x: new Date('2026-01-28'), y: 7.5423 },
    { x: new Date('2026-01-29'), y: 7.5508 },
    { x: new Date('2026-01-30'), y: 7.5384 },
    { x: new Date('2026-01-31'), y: 7.5331 },
    { x: new Date('2026-02-01'), y: 7.5411 },
    { x: new Date('2026-02-02'), y: 7.5406 },
    { x: new Date('2026-02-03'), y: 7.5563 },
    { x: new Date('2026-02-04'), y: 7.548 },
    { x: new Date('2026-02-05'), y: 7.5645 },
    { x: new Date('2026-02-06'), y: 7.5961 },
    { x: new Date('2026-02-07'), y: 7.6213 },
    { x: new Date('2026-02-08'), y: 7.6501 },
    { x: new Date('2026-02-09'), y: 7.6512 },
    { x: new Date('2026-02-10'), y: 7.6693 },
    { x: new Date('2026-02-11'), y: 7.6695 },
    { x: new Date('2026-02-12'), y: 7.5882 },
    { x: new Date('2026-02-13'), y: 7.512 },
    { x: new Date('2026-02-14'), y: 7.4893 },
    { x: new Date('2026-02-15'), y: 7.4809 },
    { x: new Date('2026-02-16'), y: 7.4812 },
    { x: new Date('2026-02-17'), y: 7.4765 },
    { x: new Date('2026-02-18'), y: 7.4973 },
    { x: new Date('2026-02-19'), y: 7.4755 },
    { x: new Date('2026-02-20'), y: 7.5115 },
    { x: new Date('2026-02-21'), y: 7.5268 },
    { x: new Date('2026-02-22'), y: 7.537 },
    { x: new Date('2026-02-23'), y: 7.5374 },
    { x: new Date('2026-02-24'), y: 7.5359 },
    { x: new Date('2026-02-25'), y: 7.5282 },
    { x: new Date('2026-02-26'), y: 7.5753 },
    { x: new Date('2026-02-27'), y: 7.6179 },
    { x: new Date('2026-02-28'), y: 7.5944 },
    { x: new Date('2026-03-01'), y: 7.5997 },
    { x: new Date('2026-03-02'), y: 7.5981 },
    { x: new Date('2026-03-03'), y: 7.5836 },
    { x: new Date('2026-03-04'), y: 7.5841 },
    { x: new Date('2026-03-05'), y: 7.52 },
    { x: new Date('2026-03-06'), y: 7.5017 },
    { x: new Date('2026-03-07'), y: 7.4968 },
    { x: new Date('2026-03-08'), y: 7.5041 },
    { x: new Date('2026-03-09'), y: 7.5043 },
    { x: new Date('2026-03-10'), y: 7.4901 },
    { x: new Date('2026-03-11'), y: 7.5122 },
    { x: new Date('2026-03-12'), y: 7.529 },
    { x: new Date('2026-03-13'), y: 7.5339 },
    { x: new Date('2026-03-14'), y: 7.5107 },
    { x: new Date('2026-03-15'), y: 7.4683 }];

const options = {
    chart: {
        type: 'area',
        height: 300,
        toolbar: { show: false },
        zoom: { enabled: false }
    },
    series: [{ name: '', data: fullData }],
    xaxis: {
        type: 'datetime'
    },
    yaxis: {
        tickAmount: 7,
        labels: {
            formatter: val => `${val.toLocaleString('ja-JP')}円`,
            offsetX: -17
        }
    },
    grid: {
        padding: {
            left: -10,
            right: 0
        }
    },
    tooltip: {
        x: {
                formatter: val => {
                    const date = new Date(val);
                    return new Intl.DateTimeFormat('ja-JP', {
                        year: 'numeric',
                        month: 'long',
                        day: 'numeric',
                        weekday: 'short'
                }).format(date);
            }
        },
        y: {
            formatter: val => `${val.toLocaleString('ja-JP')}円`
        }
    },
    stroke: {
        curve: 'smooth',
        width: 2
    },
    fill: {
        type: 'gradient',
        gradient: {
            shadeIntensity: 1,
            opacityFrom: 0.8,
            opacityTo: 0,
            stops: [0, 90, 100]
        }
    },
    colors: ['#007bff'],
    legend: { show: false },
    dataLabels: { enabled: false }
};

const chart = new ApexCharts(document.querySelector("#chart"), options);
chart.render();

function updateChart(months) {
    const sortedData = [...fullData].sort((a, b) => a.x - b.x);
    const latestDate = sortedData[sortedData.length - 1].x;
    const start = new Date(latestDate);
    start.setMonth(start.getMonth() - months);

    const filtered = fullData.filter(item => item.x >= start && item.x <= latestDate);
    chart.updateSeries([{ name: '', data: filtered }]);
}

document.querySelectorAll('.filter-btn').forEach(btn => {
    btn.addEventListener('click', () => {
        document.querySelectorAll('.filter-btn').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        const months = parseInt(btn.dataset.months);
        updateChart(months);
    });
});
updateChart(1);