const fullData = [
    { x: new Date('2025-04-06'), y: 189.52 },
    { x: new Date('2025-04-07'), y: 188.15 },
    { x: new Date('2025-04-08'), y: 188.22 },
    { x: new Date('2025-04-09'), y: 187.18 },
    { x: new Date('2025-04-10'), y: 187.18 },
    { x: new Date('2025-04-11'), y: 187.29 },
    { x: new Date('2025-04-12'), y: 187.48 },
    { x: new Date('2025-04-13'), y: 187.41 },
    { x: new Date('2025-04-14'), y: 187.95 },
    { x: new Date('2025-04-15'), y: 188.51 },
    { x: new Date('2025-04-16'), y: 189.24 },
    { x: new Date('2025-04-17'), y: 188.48 },
    { x: new Date('2025-04-18'), y: 188.74 },
    { x: new Date('2025-04-19'), y: 188.88 },
    { x: new Date('2025-04-20'), y: 188.85 },
    { x: new Date('2025-04-21'), y: 188.58 },
    { x: new Date('2025-04-22'), y: 188.41 },
    { x: new Date('2025-04-23'), y: 188.62 },
    { x: new Date('2025-04-24'), y: 189.50 },
    { x: new Date('2025-04-25'), y: 189.98 },
    { x: new Date('2025-04-26'), y: 191.12 },
    { x: new Date('2025-04-27'), y: 191.08 },
    { x: new Date('2025-04-28'), y: 191.23 },
    { x: new Date('2025-05-02'), y: 192.42 },
    { x: new Date('2025-05-03'), y: 192.22 },
    { x: new Date('2025-05-05'), y: 191.87 },
    { x: new Date('2025-05-06'), y: 191.87 },
    { x: new Date('2025-05-07'), y: 190.94 },
    { x: new Date('2025-05-08'), y: 191.21 },
    { x: new Date('2025-05-09'), y: 192.84 },
    { x: new Date('2025-05-10'), y: 193.15 },
    { x: new Date('2025-05-11'), y: 193.05 },
    { x: new Date('2025-05-12'), y: 193.66 },
    { x: new Date('2025-05-13'), y: 195.17 },
    { x: new Date('2025-05-14'), y: 195.97 },
    { x: new Date('2025-05-15'), y: 194.66 },
    { x: new Date('2025-05-16'), y: 193.76 },
    { x: new Date('2025-05-17'), y: 193.52 },
    { x: new Date('2025-05-19'), y: 193.24 },
    { x: new Date('2025-05-20'), y: 193.66 },
    { x: new Date('2025-05-21'), y: 193.34 },
    { x: new Date('2025-05-22'), y: 192.92 },
    { x: new Date('2025-05-24'), y: 192.85 },
    { x: new Date('2025-05-26'), y: 193.23 },
    { x: new Date('2025-05-27'), y: 193.56 },
    { x: new Date('2025-05-29'), y: 195.21 },
    { x: new Date('2025-06-02'), y: 193.75 },
    { x: new Date('2025-06-06'), y: 194.77 },
    { x: new Date('2025-06-10'), y: 195.85 },
    { x: new Date('2025-06-11'), y: 195.60 },
    { x: new Date('2025-06-12'), y: 195.61 },
    { x: new Date('2025-06-14'), y: 195.34 },
    { x: new Date('2025-06-15'), y: 195.31 },
    { x: new Date('2025-06-16'), y: 195.78 },
    { x: new Date('2025-06-17'), y: 196.17 },
    { x: new Date('2025-06-18'), y: 195.63 },
    { x: new Date('2025-06-20'), y: 195.64 },
    { x: new Date('2025-06-21'), y: 196.35 },
    { x: new Date('2025-06-22'), y: 196.31 },
    { x: new Date('2025-06-23'), y: 196.42 },
    { x: new Date('2025-06-24'), y: 197.52 },
    { x: new Date('2025-06-25'), y: 197.25 },
    { x: new Date('2025-06-26'), y: 198.25 },
    { x: new Date('2025-06-27'), y: 198.31 },
    { x: new Date('2025-06-28'), y: 198.45 },
    { x: new Date('2025-06-29'), y: 198.46 },
    { x: new Date('2025-06-30'), y: 198.29 },
    { x: new Date('2025-07-01'), y: 197.66 },
    { x: new Date('2025-07-02'), y: 197.11 },
    { x: new Date('2025-07-04'), y: 197.36 },
    { x: new Date('2025-07-05'), y: 197.23 },
    { x: new Date('2025-07-06'), y: 197.23 },
    { x: new Date('2025-07-07'), y: 197.21 },
    { x: new Date('2025-07-08'), y: 198.51 },
    { x: new Date('2025-07-09'), y: 199.22 },
    { x: new Date('2025-07-10'), y: 198.86 },
    { x: new Date('2025-07-11'), y: 198.5950 },
    { x: new Date('2025-07-12'), y: 198.84 },
    { x: new Date('2025-07-13'), y: 198.8148 },
    { x: new Date('2025-07-14'), y: 198.6572 },
    { x: new Date('2025-07-15'), y: 198.4839 },
    { x: new Date('2025-07-16'), y: 199.077 },
    { x: new Date('2025-07-17'), y: 198.7419 },
    { x: new Date('2025-07-19'), y: 199.5943 },
    { x: new Date('2025-07-20'), y: 199.5703 },
    { x: new Date('2025-07-21'), y: 199.3458 },
    { x: new Date('2025-07-22'), y: 198.8373 },
    { x: new Date('2025-07-23'), y: 198.4267 },
    { x: new Date('2025-07-24'), y: 198.5754 },
    { x: new Date('2025-07-25'), y: 198.5645 },
    { x: new Date('2025-07-26'), y: 198.4752 },
    { x: new Date('2025-07-27'), y: 198.4976 },
    { x: new Date('2025-07-29'), y: 198.6040 },
    { x: new Date('2025-07-30'), y: 198.2273 },
    { x: new Date('2025-07-31'), y: 197.9432 },
    { x: new Date('2025-08-01'), y: 198.8199 },
    { x: new Date('2025-08-02'), y: 196.5526 },
    { x: new Date('2025-08-03'), y: 196.6871 },
    { x: new Date('2025-08-04'), y: 195.8827 },
    { x: new Date('2025-08-05'), y: 195.5227 },
    { x: new Date('2025-08-07'), y: 196.5392 },
    { x: new Date('2025-08-08'), y: 197.5258 },
    { x: new Date('2025-08-09'), y: 198.5057 },
    { x: new Date('2025-08-10'), y: 198.4434 },
    { x: new Date('2025-08-11'), y: 198.4799 },
    { x: new Date('2025-08-12'), y: 198.8090 },
    { x: new Date('2025-08-13'), y: 199.5740 },
    { x: new Date('2025-08-14'), y: 199.8737 },
    { x: new Date('2025-08-15'), y: 199.6647 },
    { x: new Date('2025-08-16'), y: 199.4085 },
    { x: new Date('2025-08-18'), y: 199.5919 },
    { x: new Date('2025-08-19'), y: 199.7574 },
    { x: new Date('2025-08-20'), y: 199.3553 },
    { x: new Date('2025-08-21'), y: 198.4323 },
    { x: new Date('2025-08-22'), y: 198.9117 },
    { x: new Date('2025-08-23'), y: 198.8352 },
    { x: new Date('2025-08-24'), y: 198.8876 },
    { x: new Date('2025-08-25'), y: 198.9047 },
    { x: new Date('2025-08-26'), y: 198.9333 },
    { x: new Date('2025-08-27'), y: 198.6978 },
    { x: new Date('2025-08-28'), y: 198.8885 },
    { x: new Date('2025-08-29'), y: 198.5524 },
    { x: new Date('2025-08-30'), y: 198.436 },
    { x: new Date('2025-08-31'), y: 198.3988 },
    { x: new Date('2025-09-01'), y: 198.6157 },
    { x: new Date('2025-09-02'), y: 199.1886 },
    { x: new Date('2025-09-03'), y: 198.8551 },
    { x: new Date('2025-09-04'), y: 199.0202 },
    { x: new Date('2025-09-05'), y: 199.4449 },
    { x: new Date('2025-09-06'), y: 199.2125 },
    { x: new Date('2025-09-07'), y: 199.2493 },
    { x: new Date('2025-09-08'), y: 200.012 },
    { x: new Date('2025-09-09'), y: 199.8103 },
    { x: new Date('2025-09-10'), y: 199.3051 },
    { x: new Date('2025-09-11'), y: 199.5019 },
    { x: new Date('2025-09-12'), y: 199.7903 },
    { x: new Date('2025-09-13'), y: 200.1478 },
    { x: new Date('2025-09-14'), y: 200.1354 },
    { x: new Date('2025-09-15'), y: 200.2128 },
    { x: new Date('2025-09-16'), y: 200.4313 },
    { x: new Date('2025-09-17'), y: 200.1091 },
    { x: new Date('2025-09-18'), y: 200.0282 },
    { x: new Date('2025-09-19'), y: 200.4032 },
    { x: new Date('2025-09-20'), y: 199.5132 },
    { x: new Date('2025-09-21'), y: 199.5857 },
    { x: new Date('2025-09-22'), y: 199.4389 },
    { x: new Date('2025-09-23'), y: 199.6118 },
    { x: new Date('2025-09-24'), y: 199.6536 },
    { x: new Date('2025-09-25'), y: 200.0412 },
    { x: new Date('2025-09-26'), y: 199.8584 },
    { x: new Date('2025-09-27'), y: 200.2696 },
    { x: new Date('2025-09-28'), y: 200.2234 },
    { x: new Date('2025-09-29'), y: 200.2952 },
    { x: new Date('2025-09-30'), y: 199.7028 },
    { x: new Date('2025-10-01'), y: 198.974 },
    { x: new Date('2025-10-02'), y: 198.3004 },
    { x: new Date('2025-10-03'), y: 197.8914 },
    { x: new Date('2025-10-04'), y: 198.6001 },
    { x: new Date('2025-10-05'), y: 198.5275 },
    { x: new Date('2025-10-06'), y: 200.2119 },
    { x: new Date('2025-10-06'), y: 200.2119 },
    { x: new Date('2025-10-07'), y: 202.201 },
    { x: new Date('2025-10-08'), y: 203.2454 },
    { x: new Date('2025-10-09'), y: 204.3984 },
    { x: new Date('2025-10-10'), y: 203.8211 },
    { x: new Date('2025-10-11'), y: 202.446 },
    { x: new Date('2025-10-12'), y: 202.4781 },
    { x: new Date('2025-10-13'), y: 202.6681 },
    { x: new Date('2025-10-14'), y: 202.8838 },
    { x: new Date('2025-10-15'), y: 202.1336 },
    { x: new Date('2025-10-16'), y: 202.2025 },
    { x: new Date('2025-10-17'), y: 202.1781 },
    { x: new Date('2025-10-18'), y: 202.0087 },
    { x: new Date('2025-10-20'), y: 201.9664 },
    { x: new Date('2025-10-21'), y: 202.3852 },
    { x: new Date('2025-10-22'), y: 202.713 },
    { x: new Date('2025-10-23'), y: 202.7348 },
    { x: new Date('2025-10-24'), y: 203.2896 },
    { x: new Date('2025-10-25'), y: 203.4269 },
    { x: new Date('2025-10-26'), y: 203.4269 },
    { x: new Date('2025-10-27'), y: 203.4536 },
    { x: new Date('2025-10-28'), y: 203.7735 },
    { x: new Date('2025-10-29'), y: 203.8117 },
    { x: new Date('2025-10-30'), y: 202.0766 },
    { x: new Date('2025-10-31'), y: 201.2678 },
    { x: new Date('2025-11-01'), y: 202.48520723 },
    { x: new Date('2025-11-02'), y: 202.4891 },
    { x: new Date('2025-11-03'), y: 202.4558 },
    { x: new Date('2025-11-04'), y: 202.5211 },
    { x: new Date('2025-11-05'), y: 200.3332 },
    { x: new Date('2025-11-06'), y: 200.7964 },
    { x: new Date('2025-11-07'), y: 200.84737571 },
    { x: new Date('2025-11-08'), y: 200.9717 },
    { x: new Date('2025-11-09'), y: 201.4984 },
    { x: new Date('2025-11-10'), y: 201.5091 },
    { x: new Date('2025-11-11'), y: 201.8937 },
    { x: new Date('2025-11-12'), y: 202.867 },
    { x: new Date('2025-11-13'), y: 202.7606 },
    { x: new Date('2025-11-14'), y: 203.0677 },
    { x: new Date('2025-11-15'), y: 203.465 },
    { x: new Date('2025-11-16'), y: 203.3485 },
    { x: new Date('2025-11-17'), y: 203.3485 },
    { x: new Date('2025-11-18'), y: 203.3469 },
    { x: new Date('2025-11-19'), y: 204.1024 },
    { x: new Date('2025-11-20'), y: 204.347 },
    { x: new Date('2025-11-21'), y: 204.9357 },
    { x: new Date('2025-11-22'), y: 205.8509 },
    { x: new Date('2025-11-23'), y: 205.2138 },
    { x: new Date('2025-11-24'), y: 205.2138 },
    { x: new Date('2025-11-25'), y: 205.5779 },
    { x: new Date('2025-11-26'), y: 205.5779 },
    { x: new Date('2025-11-27'), y: 205.5395 },
    { x: new Date('2025-11-28'), y: 206.7297 },
    { x: new Date('2025-11-29'), y: 206.892 },
    { x: new Date('2025-11-30'), y: 206.6295 },
    { x: new Date('2025-12-01'), y: 206.5494 },
    { x: new Date('2025-12-02'), y: 205.4745 },
    { x: new Date('2025-12-03'), y: 205.8945 },
    { x: new Date('2025-12-04'), y: 206.8315 },
    { x: new Date('2025-12-05'), y: 206.6981 },
    { x: new Date('2025-12-06'), y: 206.9912 },
    { x: new Date('2025-12-07'), y: 206.9902 },
    { x: new Date('2025-12-08'), y: 206.9371 },
    { x: new Date('2025-12-09'), y: 207.5058 },
    { x: new Date('2025-12-10'), y: 208.4688 },
    { x: new Date('2025-12-11'), y: 208.5562 },
    { x: new Date('2025-12-12'), y: 208.3126 },
    { x: new Date('2025-12-13'), y: 208.4005 },
    { x: new Date('2025-12-14'), y: 208.3976 },
    { x: new Date('2025-12-15'), y: 208.3461 },
    { x: new Date('2025-12-16'), y: 207.6222 },
    { x: new Date('2025-12-17'), y: 207.6872 },
    { x: new Date('2025-12-18'), y: 207.9228 },
    { x: new Date('2025-12-19'), y: 208.2976 },
    { x: new Date('2025-12-20'), y: 210.4801 },
    { x: new Date('2025-12-21'), y: 210.3223 },
    { x: new Date('2025-12-22'), y: 210.8121 },
    { x: new Date('2025-12-23'), y: 211.2218 },
    { x: new Date('2025-12-24'), y: 210.8717 },
    { x: new Date('2025-12-25'), y: 210.5911 },
    { x: new Date('2025-12-26'), y: 210.6812 },
    { x: new Date('2025-12-27'), y: 211.2408 },
    { x: new Date('2025-12-29'), y: 211.2426 },
    { x: new Date('2025-12-30'), y: 211.1975 },
    { x: new Date('2025-12-31'), y: 210.7921 },
    { x: new Date('2026-01-01'), y: 210.6416 },
    { x: new Date('2026-01-02'), y: 210.8912 },
    { x: new Date('2026-01-03'), y: 210.9952 },
    { x: new Date('2026-01-04'), y: 211.1009 },
    { x: new Date('2026-01-05'), y: 211.099 },
    { x: new Date('2026-01-06'), y: 210.9251 },
    { x: new Date('2026-01-07'), y: 211.485 },
    { x: new Date('2026-01-08'), y: 211.541 },
    { x: new Date('2026-01-09'), y: 211.0754 },
    { x: new Date('2026-01-10'), y: 210.7517 },
    { x: new Date('2026-01-11'), y: 211.5821 },
    { x: new Date('2026-01-12'), y: 211.5777 },
    { x: new Date('2026-01-13'), y: 211.7782 },
    { x: new Date('2026-01-14'), y: 212.6793 },
    { x: new Date('2026-01-15'), y: 213.7239 },
    { x: new Date('2026-01-16'), y: 213.0547 },
    { x: new Date('2026-01-17'), y: 212.3716 },
    { x: new Date('2026-01-18'), y: 211.6911 },
    { x: new Date('2026-01-19'), y: 211.7293 },
    { x: new Date('2026-01-20'), y: 211.2131 },
    { x: new Date('2026-01-21'), y: 212.0404 },
    { x: new Date('2026-01-22'), y: 212.4925 },
    { x: new Date('2026-01-23'), y: 212.4041 },
    { x: new Date('2026-01-24'), y: 213.5196 },
    { x: new Date('2026-01-25'), y: 212.9682 },
    { x: new Date('2026-01-26'), y: 213.3078 },
    { x: new Date('2026-01-27'), y: 212.1436 },
    { x: new Date('2026-01-28'), y: 210.7732 },
    { x: new Date('2026-01-29'), y: 210.7713 },
    { x: new Date('2026-01-30'), y: 211.3053 },
    { x: new Date('2026-01-31'), y: 211.3919 },
    { x: new Date('2026-02-01'), y: 211.7925 },
    { x: new Date('2026-02-02'), y: 211.7719 },
    { x: new Date('2026-02-03'), y: 212.2618 },
    { x: new Date('2026-02-04'), y: 212.3481 },
    { x: new Date('2026-02-05'), y: 213.2359 },
    { x: new Date('2026-02-06'), y: 214.2163 },
    { x: new Date('2026-02-07'), y: 212.6651 },
    { x: new Date('2026-02-08'), y: 213.5879 },
    { x: new Date('2026-02-09'), y: 213.4839 },
    { x: new Date('2026-02-10'), y: 213.9192 },
    { x: new Date('2026-02-11'), y: 213.3611 },
    { x: new Date('2026-02-12'), y: 211.1085 },
    { x: new Date('2026-02-13'), y: 209.205 },
    { x: new Date('2026-02-14'), y: 208.4188 },
    { x: new Date('2026-02-15'), y: 208.5577 },
    { x: new Date('2026-02-16'), y: 208.5659 },
    { x: new Date('2026-02-17'), y: 208.4461 },
    { x: new Date('2026-02-18'), y: 209.2082 },
    { x: new Date('2026-02-19'), y: 207.8432 },
    { x: new Date('2026-02-20'), y: 208.8053 },
    { x: new Date('2026-02-21'), y: 208.6857 },
    { x: new Date('2026-02-22'), y: 209.1135 },
    { x: new Date('2026-02-23'), y: 209.1179 },
    { x: new Date('2026-02-24'), y: 208.9443 },
    { x: new Date('2026-02-25'), y: 208.6964 },
    { x: new Date('2026-02-26'), y: 210.229 },
    { x: new Date('2026-02-27'), y: 211.6787 },
    { x: new Date('2026-02-28'), y: 210.7459 },
    { x: new Date('2026-03-01'), y: 210.3082 },
    { x: new Date('2026-03-02'), y: 210.2849 },
    { x: new Date('2026-03-03'), y: 209.814 },
    { x: new Date('2026-03-04'), y: 210.7473 },
    { x: new Date('2026-03-05'), y: 210.3836 },
    { x: new Date('2026-03-06'), y: 209.9769 },
    { x: new Date('2026-03-07'), y: 210.2586 },
    { x: new Date('2026-03-08'), y: 211.0839 },
    { x: new Date('2026-03-09'), y: 210.939 },
    { x: new Date('2026-03-10'), y: 210.9708 },
    { x: new Date('2026-03-11'), y: 211.7468 },
    { x: new Date('2026-03-12'), y: 212.1345 },
    { x: new Date('2026-03-13'), y: 212.8371 },
    { x: new Date('2026-03-14'), y: 212.6643 },
    { x: new Date('2026-03-15'), y: 211.4272 },
    { x: new Date('2026-03-16'), y: 211.4794 },
    { x: new Date('2026-03-17'), y: 211.2632 },
    { x: new Date('2026-03-18'), y: 211.687 },
    { x: new Date('2026-03-19'), y: 212.1901 },
    { x: new Date('2026-03-20'), y: 211.5105 },
    { x: new Date('2026-03-21'), y: 211.9564 },
    { x: new Date('2026-03-22'), y: 212.2772 },
    { x: new Date('2026-03-23'), y: 212.2556 },
    { x: new Date('2026-03-24'), y: 212.2074 },
    { x: new Date('2026-03-25'), y: 212.627 },
    { x: new Date('2026-03-26'), y: 212.7542 },
    { x: new Date('2026-03-27'), y: 212.9686 },
    { x: new Date('2026-03-28'), y: 212.9582 },
    { x: new Date('2026-03-29'), y: 212.6152 },
    { x: new Date('2026-03-30'), y: 212.6396 },
    { x: new Date('2026-03-31'), y: 212.3618 },
    { x: new Date('2026-04-01'), y: 210.7343 },
    { x: new Date('2026-04-02'), y: 211.07713769 },
    { x: new Date('2026-04-03'), y: 211.0225 },
    { x: new Date('2026-04-04'), y: 210.9435 },
    { x: new Date('2026-04-05'), y: 210.7598 },
    { x: new Date('2026-04-06'), y: 210.7738 },
    { x: new Date('2026-04-07'), y: 210.7085 },
    { x: new Date('2026-04-08'), y: 211.258 },
    { x: new Date('2026-04-09'), y: 212.1185 },
    { x: new Date('2026-04-10'), y: 212.6015 },
    { x: new Date('2026-04-11'), y: 213.4467 },
    { x: new Date('2026-04-12'), y: 214.2414 },
    { x: new Date('2026-04-13'), y: 214.1607 },
    { x: new Date('2026-04-14'), y: 214.0743 },
    { x: new Date('2026-04-15'), y: 214.9073 }];

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 startTime = start.getTime();

    const filtered = fullData.filter(item =>
        item.x >= startTime && item.x <= latestDate
    );

    chart.updateSeries([{ name: '', data: filtered }], true);

    chart.updateOptions({
        xaxis: {
            type: 'datetime',
            min: startTime,
            max: latestDate
        }
    });
}

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);