import { Ref, computed, ref, watchEffect } from 'vue';
import { defineStore } from 'pinia';
import { listen } from '@tauri-apps/api/event';
import * as path from '@tauri-apps/api/path';
import { invoke } from './invoke';
import { Dirs, Game, Package, Profile, ProfileMeta } from './types';
import { changePrimaryColor, pkgKey } from './util';

type InstallStatus = {
    pkg: string;
};

export const useGeneralStore = defineStore('general', () => {
    const dirs: Ref<Dirs | null> = ref(null);

    const configDir = computed(() => {
        if (dirs.value === null) {
            throw new Error('Invalid directory access');
        }
        return dirs.value.config_dir;
    });
    const dataDir = computed(() => {
        if (dirs.value === null) {
            throw new Error('Invalid directory access');
        }
        return dirs.value.data_dir;
    });
    const cacheDir = computed(() => {
        if (dirs.value === null) {
            throw new Error('Invalid directory access');
        }
        return dirs.value.cache_dir;
    });

    return { dirs, configDir, dataDir, cacheDir };
});

export const usePkgStore = defineStore('pkg', {
    state: (): { pkg: { [key: string]: Package } } => {
        return {
            pkg: {},
        };
    },
    getters: {
        fromDepString: (state) => (str: string) => state.pkg[str] ?? null,
        fromName: (state) => (namespace: string, name: string) =>
            state.pkg[`${namespace}-${name}`] ?? null,
        all: (state) => Object.values(state),
        allLocal: (state) => Object.values(state.pkg).filter((p) => p.loc),
        allRemote: (state) => Object.values(state.pkg).filter((p) => p.rmt),
    },
    actions: {
        setupListeners() {
            listen<InstallStatus>('install-start', async (ev) => {
                const key = ev.payload.pkg;
                await this.reload(key);
                this.pkg[key].js.busy = true;
            });

            listen<InstallStatus>('install-end', async (ev) => {
                const key = ev.payload.pkg;
                await this.reload(key);
                this.pkg[key].js.busy = false;
            });
        },

        async reloadAll() {
            await invoke('reload_all_packages');
            const data = (await invoke('get_all_packages')) as {
                [key: string]: Package;
            };

            for (const [k, v] of Object.entries(data)) {
                this.reloadWith(k, v);
            }
        },

        async reload(pkgOrKey: string | Package) {
            const key =
                typeof pkgOrKey === 'string' ? pkgOrKey : pkgKey(pkgOrKey);
            const pkg: Package = await invoke('get_package', {
                key,
            });
            this.reloadWith(key, pkg);
        },

        async reloadWith(key: string, pkg: Package) {
            if (this.pkg[key] === undefined) {
                this.pkg[key] = { js: { busy: false } } as Package;
            } else {
                this.pkg[key].loc = null;
                this.pkg[key].rmt = null;
            }
            Object.assign(this.pkg[key], pkg);
        },

        async fetch() {
            await invoke('fetch_listings');
            await this.reloadAll();
        },
    },
});

export const usePrfStore = defineStore('prf', () => {
    const current: Ref<Profile | null> = ref(null);
    const list: Ref<ProfileMeta[]> = ref([]);

    const isPkgEnabled = (pkg: Package | undefined) =>
        computed(
            () =>
                pkg !== undefined &&
                current.value !== null &&
                current.value?.mods.includes(pkgKey(pkg))
        );

    const reload = async () => {
        const p = (await invoke('get_current_profile')) as any;
        if (p != null && 'OngekiProfile' in p) {
            current.value = { ...p.OngekiProfile, game: 'ongeki' };
        } else {
            current.value = null;
        }
        if (current.value !== null) {
            changePrimaryColor(current.value.game);
        } else {
            changePrimaryColor(null);
        }
    };

    const create = async (game: Game) => {
        try {
            await invoke('init_profile', {
                game,
                name: 'new-profile',
            });
            await reload();
            await reloadList();
        } catch (e) {
            current.value = null;
        }

        if (current.value !== null) {
            const pkgs = usePkgStore();
            pkgs.reloadAll();
        }
    };

    const rename = async (profile: ProfileMeta, name: string) => {
        await invoke('rename_profile', {
            profile,
            name,
        });

        if (
            current.value?.game === profile.game &&
            current.value.name === profile.name
        ) {
            current.value.name = name;
        }

        await reloadList();
    };

    const switchTo = async (game: Game, name: string) => {
        await invoke('load_profile', { game, name });
        await reload();
        if (current.value !== null) {
            const pkgs = usePkgStore();
            pkgs.reloadAll();
        }
    };

    const reloadList = async () => {
        list.value = (await invoke('list_profiles')) as ProfileMeta[];
    };

    const togglePkg = async (pkg: Package | undefined, enable: boolean) => {
        if (pkg === undefined) {
            return;
        }
        await invoke('toggle_package', { key: pkgKey(pkg), enable });
        await reload();
    };

    const generalStore = useGeneralStore();

    const configDir = computed(async () => {
        return await path.join(
            generalStore.configDir,
            `profile-${current.value?.game}-${current.value?.name}`
        );
    });

    listen<InstallStatus>('install-end', async () => {
        await reload();
    });

    watchEffect(async () => {
        if (current.value !== null) {
            await invoke('save_current_profile', {
                profile: { OngekiProfile: current.value },
            });
        }
    });

    return {
        current,
        list,
        isPkgEnabled,
        reload,
        create,
        rename,
        switchTo,
        reloadList,
        togglePkg,
        configDir,
    };
});